ATLAS Pixel Detector Upgrade: The Insertable B-Layer
|
|
- Derrick George
- 6 years ago
- Views:
Transcription
1 UNIVERSITY OF OKLAHOMA GRADUATE COLLEGE HOMER L. DODGE DEPARTMENT OF PHYSICS AND ASTRONOMY ATLAS Pixel Detector Upgrade: The Insertable B-Layer A REPORT SUBMITTED TO THE GRADUATE FACULTY in partial fulfillment of the requirements for the SPECIALIST S EXAMINATION by DAVID BERTSCHE October 31, 2012
2 Abstract The Insertable B-Layer (IBL) is an upgrade to the ATLAS Pixel Detector with installation planned for mid In addition to increasing the lifespan of the detector, this upgrade will improve its capabilities. This paper discusses the physics motivation behind the pixel detector and how semiconductors are used in particle detectors. The design, manufacturing, installation and commissioning of the IBL are also discussed.
3 Contents 1 Introduction 1 2 Motivation: b Physics Top Physics Higgs Studies Pixel Detector Design Requirements LHC Accelerator The ATLAS Detector Tracking and Vertexing Tracking Vertexing b Tagging IBL Engineering Solid State Detectors Radiation Passage Through Semiconductors IBL Design Requirements Modules Sensor Readout Electronics Radiation Hardness Layout Supporting Hardware Manufacturing Installation Commissioning 14 6 Conclusion 15 A Appendix 16
4 1 Introduction The ATLAS 1 experiment is a large collaboration involving 174 institutions from 38 nations; it is one of four major detectors participating in the Large Hadron Collider (LHC) experiment. The detector contains many specialized subsystems including the Inner Detector. The ATLAS Inner Detector contains a Pixel Detector that specializes in identifying interaction vertices. The inner layer of this Pixel Detector, known as the B-layer, suffers so much radiation damage that the efficiency of the Pixel Detector deteriorates. After approximately five years of LHC operation, it is expected that the B-Layer will have received the maximum cumulative radiation dose for which it was designed. Figure 1: The Inner Detector is at the center of the ATLAS detector.[1] Rather than replacing the B-Layer, the solution is to insert a new layer of detector modules between the beam pipe and the present detector; this is the Insertable B-Layer (IBL). In addition to extending the lifespan of the detector, the upgrade will enhance its functionality. The Pixel Detector specializes in identifying interaction vertices; this is useful for many physics analyses. b physics, which is discussed in the following section, uses this technology. 2 Motivation: b Physics A chart of the particles in the Standard Model of Particle Physics (SM) is shown in Figure 3. The bottom (b) quark is an unstable, heavy, third generation fermion. 2 Any free quarks created by the LHC rapidly hadronize to form mesons 3 and baryons 4, and these soon fragment into a collimated spray of particles called a jet. If the jet progenitor is a particle containing a b quark then the jet 1 ATLAS: A Toroidal Lhc ApparatuS 2 Fermions are half integer spin particles. 3 Mesons are formed from a quark and an anti-quark. 4 Baryons are formed from three quarks. The proton and neutron are examples of baryons. 1
5 (a) The Pixel Detector is at the center of the Inner Detector. (b) The B -Layer is at the center of the Pixel Detector. Figure 2: Inner (a) and Pixel (b) Detectors [1] is called a b jet. The identification of a b jet is called b tagging. The IBL upgrade will enhance the detector s ability to b tag (technical details are discussed in section 3). Top physics and Higgs studies exhibit the usefulness of b tagging. 2.1 Top Physics Top quarks are very short lived, with a lifetime on the order of s. Since this is an order of magnitude lower than hadronization timescales, this does not provide enough time to form top-flavored hadrons or tt -quarkonium-bound states.[2] The proton-proton collisions of the LHC most commonly produce top and anti-top pairs through gluon interactions (gg tt ). The most common decay products of the top quark are the bottom quark and an accompanying W boson, as shown in Figure 4. The SM predicts that this decay channel has a probability of nearly 100%. Experimental evidence of a BR(t W b)5 that deviates significantly from 1 could be evidence for physics beyond the SM.[3] Since the top quark is not detected directly, it must be studied through its decay products; thus a detector that can efficiently b tag aids top physics by removing a large amount of background. 2.2 Higgs Studies The H bb decay channel is one of the channels used in the Higgs Boson search. Even though this channel does not yet provide enough statistical significance for discovery, the Higgs is expected to couple preferentially to high mass particles such as the b quark. In fact, if the SM Higgs mass is indeed 125 GeV, H bb is the dominant decay mode (Figure 5). So this channel is expected to prove powerful in measuring the relative Higgs branching ratios and its spin.[4] 3 Pixel Detector Design Requirements This section gives a brief overview of some of the aspects of the LHC and ATLAS that are relevant to the IBL, with a focus on the IBL s importance for current particle physics research. 5 BR: Branching Ratio. The probability that a certain decay will occur relative to other possible decays. 2
6 Figure 3: The elementary particles of the Standard Model. 3.1 LHC Accelerator Since the ATLAS detector is part of the LHC experiment, the LHC design determines the luminosity delivered to each detector. Luminosity is a function of the number of particles per bunch and the collision rate. These parameters in turn determine the design parameters of the detectors, such as radiation hardness requirements and readout speed requirements. The LHC was constructed in the 27 kilometer long circular tunnel remaining after the Large Electron-Positron (LEP) accelerator was decommissioned in It is designed to accelerate both protons (p) and heavy ions (A), in particular lead nuclei.[5] Stronger, superconducting electromagnets were designed and installed in order to bend the heavier particles to a sufficient radius of curvature. The LHC is planned for an ultimate p-p energy of 14 TeV at a design luminosity of cm 2 s 1 and an ultimate A-A energy of 5.5 TeV at a design luminosity of cm 2 s 1. 6 The LHC is designed for counterrotating particle beams containing 2808 bunches of particles per bunch that travel through two beam pipes. The beam pipes converge at the detectors allowing bunches to cross every ns with average of particle collisions per bunch crossing. These collision rates, energies and luminosities are unprecedented and required the development of faster and more radiation-hard electronics. 6 The maximum p-p energy reached as of writing this paper is 8 TeV at a peak luminosity of cm 2 s 1. 3
7 Figure 4: t W b and subsequent decays Figure 5: Standard Model Higgs Boson branching ratios, including theoretical uncertainties.[2] 3.2 The ATLAS Detector ATLAS is a 4π particle detector, which means that it covers almost the entirety of the solid angle around the interaction point. Each subsystem of the detector consists of a barrel section and two end caps, as shown in Figure 1 and Figure 2, which does leave small cracks through which particles can escape undetected. ATLAS uses a right-handed coordinate system; the x-axis points towards the center of the LHC ring, the z-axis points along the beam pipe and the y-axis is vertical. The Inner Detector (ID) is comprised of the Transition Radiation Tracker (TRT), the Silicon Microstrip Tracker (SCT) and the Pixel Detector, as shown in Figure 6. The ID is operated in a 2 T solenoidal field in order to curve the trajectory of charged particles. The TRT and SMT are both used to track charged particles; the TRT is made of straw tubes containing a xenon-based gas and the SMT is made of silicon strips. The main function of the Pixel Detector is vertexing and measuring impact parameters (IP). 3.3 Tracking and Vertexing Tracking and vertexing performance are critical in exploiting the full power of the LHC. Pixel detectors have the high space resolution, time resolution and granularity needed to provide this performance. Simulations show that the IBL will improve primary vertex reconstruction RMS 4
8 Figure 6: Cut-away view of the Inner Detector.[4] resolution from 15 µm to 11 µm (in the x and y directions) and from 34 µm to 24 µm (in the z direction).[4] The gains in vertex and IP resolution significantly improve b tagging performance Tracking The tracking systems of the ATLAS detector establish the presence and trajectory of charged particles. These particles can originate from the interaction point 7 or from subsequent decays. Because a magnetic field permeates the tracking systems, these charged particles travel in a curved trajectory. The transverse momentum 8 of a charged particle can be determined from the radius of curvature of its path and charge can be determined from the direction of curvature. The IBL will improve tracking by improving the IP resolution (Figure 7). This is because it is closer to the beam and has modules with a smaller z pitch than the present B-Layer. However, since the overall track length will be nearly unchanged, there is only a small contribution to the measurement of track curvature Vertexing Vertexing means tracing tracks back to their origin and deducing the location of primary and secondary interaction vertices in three dimensional space. The primary vertex is the point where two accelerated particles (such as protons) in the beam pipe collided head-on and produced many particles. In Figure 7 a particle of interest is labeled the primary particle. The secondary vertex 7 The point two particles in the beam (e.g. protons) collide head-on. 8 Transverse momentum (p T ) is the projection of total momentum onto the x-y plane. 5
9 is the point where the primary particle decayed into two or more other particles. Identifying the vertex locations aids in measuring the transverse momenta of individual particles and in identifying the flavor 9 of jets. Figure 7: The Impact Parameter (IP) is determined from the relative geometry of the primary and secondary vertices. Tracks 1 and 2 represent decay products of the primary particle. 3.4 b Tagging Jets from up, down and strange quarks are called light jets and usually cannot be distinguished from each other. Jets from charm quarks are sometimes grouped with light jets and sometimes uniquely identified. The short lifetime of the top (t) quark means the secondary decay vertex cannot readily be distinguished from the primary interaction vertex and jets are not directly t tagged. In contrast, the b quark must cross generations to decay, and thus most mesons and baryons containing the b quark have a relatively long lifetime of s. Thus these particles can travel a few millimeters from the primary vertex before decaying. Therefore b jets can be identified by a secondary vertex with a large positive IP. 10 In addition the presence of a soft 11 lepton with the appropriate relative transverse momentum can be used to b tag and can be particularly useful in distinguishing between b and c jets.[6] Computer algorithms are used to b tag; their parameters are adjusted with the goal of maximizing efficiency while minimizing the number of jets erroneously b tagged (i.e. mistagged). 12 These algorithms are tested and optimized using Monte Carlo simulations of detector events before being used on data from the experiment. Efficiency = # of jets that were b tagged actual # of b jets 9 The type of quark that the jet originated from. 10 A negative IP means the secondary vertex comes before the primary vertex with respect to the primary particle direction. This indicates that the detector resolution was not fine enough to accurately draw the particle tracks. 11 Low momentum, 5 GeV. 12 Typical efficiencies are 60%-70%, with a mistag rate of 1%. 6
10 4 IBL Engineering 4.1 Solid State Detectors Semiconducting material is used to detect ionizing radiation by operating it as a solid state ionization chamber. When ionizing radiation passes through a semiconductor, an electron in the crystal lattice can be excited from the valence band into the conduction band leaving a hole behind. This creates so-called electron-hole pairs. The electrons are then collected for preliminary processing and amplification into a signal that is sent off the detector for subsequent analysis. The basic solid state detector is essentially a silicon p-on-n diode operated with a reversed bias voltage. Pure silicon forms a hexagonal crystal structure with each atom having four valence electrons. Impurities can be added to the silicon crystal structure in a process called doping. If the dopant atom has 5 valence electrons then they are called donors (because they can donate an electron to the crystal). Silicon doped with donors is called n-type. If the dopant atom has 3 valence electrons then they act as acceptors (because they can accept an electron from the crystal). Silicon doped with acceptors is called p-type. When n-type and p-type silicon are brought together, some electrons and holes near the junction diffuse and combine creating a depleted junction region. This creates a net negative charge on the p side and a net positive charge on the n side leading to an electric field that prevents further diffusion. In the band model shown in Figure 8 this equilibrium condition can be represented by the alignment of the Fermi levels (E F ) of the two sides. Figure 8: n-type and p-type silicon in isolation (a) and after combination (b) into a diode. The central region around the junction has an absence of electrons or holes and is known as the depletion zone. E F is the Fermi level (potential energy) of the electron/hole, E C is the top of the conduction band, E V is the bottom of the valence band, E i is the intrinsic Fermi level that undoped silicon would have and V bi is the built in voltage produced. [7] Ionizing radiation can produce electron-hole pairs anywhere in the silicon sensor. However if they form outside of the depletion zone they will soon recombine. If they form in the depletion zone, the electric field present there will cause the electrons and holes to move in opposite directions. In order to increase the useful volume of the silicon sensor, a reverse bias voltage is applied by means of conducting electrodes so that the depletion zone grows. This applied voltage must be less than the breakdown voltage at which point the electric field is too high for the internal structure of the diode 7
11 and leakage current 13 is produced. This means the movable charge carriers are accelerated strongly enough by the external field that they collide with the lattice atoms creating more electron-hole pairs in an avalanche multiplication process. The same electrodes that apply the bias voltage are used to collect the electrons produced in the sensor. Figure 9 shows one cell of a pixel detector. The sensor bulk is divided into many pixels by using a pixel implant (as shown in Figure 10). The collected electrons are transferred to the electronics chip through a conducting bump bond.[8] The close proximity of the sensor and readout electronics allow for the high readout speeds required by ATLAS. Figure 9: One cell of a pixel detector.[8] Figure 10: A pixel detector module showing the sensor, bump bonds and readout electronics.[8] 13 Leakage currents contribute to noise and should be avoided, but small leakage currents are always present, even in the absence of radiation. Some additional sources are diffusion of charge carriers from the undepleted to the depleted volume and thermal generation of charge carriers at generation-recombination centers.[8] 8
12 (a) Rate of energy loss due to ionization as a function of kinetic energy of a charged pion traveling through silicon. The dotted line shows density and shell correction terms.[7] (b) Number of electron-hole pairs generated in a 300 µm thick sample of silicon.[8] Figure 11: The Bethe-Bloch formula applied to silicon. 4.2 Radiation Passage Through Semiconductors A charged particle traveling through matter experiences elastic collisions with the electrons in that material. This causes the charged particle to lose energy based on the distance traveled through the material. For moderately relativistic charged particles, other than electrons, this process is described by the Bethe-Bloch formula, [ de dx = 2πN orem 2 e c 2 ρ Zz2 Aβ 2 ln ( 2me γ 2 v 2 W max See Appendix A for an explanation of the variables. I 2 ) 2β 2 δ 2 C ]. Z As shown in Figure 11a, the amount of energy deposited by the charged particle has a minimum value. Most relativistic particles (such as muons) have a mean energy loss close to the minimum and are know as mip s (minimum ionizing particles).[2] The rise after the minimum is known as the relativistic rise and comes from rare large energy transfers to a few electrons. Approximately a third of the energy lost by a charged particle while traversing silicon goes into electron-hole production; the rest is eventually dissipated as thermal energy. 4.3 IBL Design Requirements The primary motivations for the B-Layer upgrade are to alleviate radiation damage and to provide improved measurement accuracy, with a long term motivation to provide the capacity to handle the increased luminosity associated with operating the LHC at increasingly higher energies and culminating with the installation of the High Luminosity LHC (HL-LHC) in The present B-Layer was designed for a lifetime integrated luminosity of 300 fb 1, and radiation damage will appear in it over time. This decreases the impact parameter resolution, which seriously deteriorates the efficiency of b tagging and vertexing. The IBL has a lifetime integrated luminosity of 550 fb 1 and is capable of restoring full b tagging functionality to the pixel detector even if the present B-Layer fails completely from radiation damage. The beam pipe section currently inside the 9
13 ID will be removed and replaced with one of a smaller radius. This will place the innermost layer of the detector closer to the interaction point, thus improving vertexing and track reconstruction. The present LHC is expected to achieve a peak luminosity of cm 2 s 1, twice what the current Pixel Detector was designed for. The predicted maximum rate of 50 interactions per bunch crossing will lead to event pileup 14 and increased readout inefficiencies. The IBL is designed for a peak luminosity of cm 2 s 1 and has a comparatively low occupancy 15 which will restore readout efficiencies even with increased luminosities. Better vertex resolution will also better distinguish between primary and secondary vertices.[4] The IBL project has some unique constraints that require the application of novel engineering solutions. The small size of the IBL introduces tight tolerances and clearances thus increasing the complexity and precision required in general. It also means the sensor elements can t be overlapped in the z direction and sensors with thin edges must be developed and used. Minimizing materials are critical to performance optimization and are being integrated into all elements of the IBL: a new thin sensor design, low density carbon foam staves, CO 2 evaporative cooling and aluminum electrical conduits. 4.4 Modules Sensor Two sensor designs with a pixel size of µm 2 were chosen (both of them developed out of the p-on-n sensor introduced above): planar thin edge n-in-n sensors for the low η 16 region and double-sided 3D thin edge sensors for the high η region where tracking and z-resolution will most benefit from the electrode orientation. Radiation damage will increase the full depletion voltage required to an expected value of more than 1000V. Since the maximum reverse bias voltage expected to be available is 700V, this means that under-depleted operation of the sensors will be necessary for a significant part of the detector lifetime. To cope with this, a planar n-in-n sensor design was chosen as shown in Figure 12. The double-sided processing allows for a guard ring concept that maintains the sensor edge at ground potential.[11] 3D sensors are very similar in design and operation to planar sensors except that the electrodes extend into the sensor bulk as shown in Figure Readout Electronics A new Front-End (FE) Integrated Circuit (IC), named the FE-I4 chip, has been developed with 130 nm feature size technology for use in the both the IBL and HL-LHC upgrades. The motivations for creating this chip are to decrease the power and material requirements while increasing radiation tolerance and data capacity associated with the higher hit rates expected. The overall chip size will be increased from the previous FE-I3 chip in order to reduce manufacturing costs, but the peripheral chip area will decrease so that the active fraction of the module grows from 74% to almost 90%. The hit data from each pixel are stored in an on-chip buffer until triggering is completed and then the data are either read out or dumped. The architecture of the FE-I4 chip has been designed 14 Pileup happens when data from multiple events overlap, because the pixels can t be read out and reset rapidly enough. 15 Occupancy is the fraction of pixels that register a hit for a given event. Low occupancy is desireable because this improves track reconstruction. 16 η = ln[tan( θ )] where θ is the angle in degrees measured from the beam (or z) direction. η (psuedorapidity) is 2 the zero mass approximation of rapidity, which is Lorentz invariant and thus used in preference to θ. 10
14 Figure 12: n-in-n sensor design. The p-n diode junction is near the bottom edge. The distance between the outer edge and the first pixel is decreased from 450 µm to 100 µm in a slim edge sensor design.[11] to exploit the prediction that 99.75% of the hits will not pass triggers so that data will not be read out.[9] Negative charges are collected from the sensor, and each pixel has independent amplification, discrimination and threshold adjustment. An externally supplied 40 MHz clock provides timing, and time over threshold measurements (ToT) are stored with 4-bit resolution (Figure 14). Data from a maximum of 256 clock cycles are stored in the buffer for retrieval by the trigger. Data from a triggered pixel and its four neighbors are retrieved to enhance tracking resolution. 4.5 Radiation Hardness Exposing solid state sensors to intense nuclear radiation can drastically change the basic material bulk properties. These damages include the displacement of lattice atoms and nucleus transmutation through neutron capture. These defects can act as recombination-generation centers (meaning they spontaneously absorb and emit charge carriers) which increases the reverse bias current. They can act as trapping centers (meaning they trap charge carriers and re-emit them after some delay) which reduces detection efficiency. And they can change the charge density in the depletion zone, thus requiring an increased bias voltage to restore full sensor sensitivity. This eventually leads to type inversion.[7] Some steps can be taken to prevent and remedy radiation damage in the Pixel Detector. The introduction of oxygen impurities into the sensor bulk increases its tolerance to damage caused by charged hadrons. Room temperature annealing for about a week allows displaced lattice atoms to naturally move back to their positions. Because irradiation of the sensor bulk will eventually change the effective doping concentration leading to type inversion (from n-type to p-type), an n-in-n sensor design is used. After type inversion, the junction moves to the top side of the sensor allowing operation even if the bulk can 11
15 Figure 13: Double-sided slim edge 3D sensor design. An un-etched distance (d) of 20 µm is left for mechanical integrity.[11] not be fully depleted. This process is illustrated in Figure 15. Thus the sensor can still be operated even if the voltage required for full depletion exceeds the breakdown voltage. The FE electronics are also made of semiconductor material and suffer similar damage to that described for the sensors. Radiation-hard electronics are produced by using high quality gate oxides, guard rings around individual transistors and silicon on insulator (SOI) techniques. 4.6 Layout Figure 16 is a schematic showing a quarter section of the new beam pipe and IBL. There presently exists a radial free space of 8.5 mm between the beam pipe and the Pixel Detector; in addition, the inner radius of the beam pipe will be reduced from 29 mm to 25 mm. This gives a radial space of 12.5 mm into which the IBL will be inserted. The modules will be mounted on 14 staves arranged cylindrically around the beam pipe. Full hermetic coverage in φ is possible by tilting the staves by about 27 compared to the radial direction. However full coverage in the z direction is not possible due to space constraints. The coverage gap in the z direction is minimized by using sensors with slim edges. 4.7 Supporting Hardware Cooling fluid (CO 2 ) will run through a cooling channel in each stave to carry away heat generated by the modules to maintain the IBL at close to the target temperature of -15 C. Low voltage supplies, high voltage supplies and optical data links are delivered to the modules through service cables Manufacturing A flip chip bump bonding process is used to integrate the FE-I4 chips and the sensors into a bare module. The sensor and readout chip wafers are thinned and diced before bump bonding through a 17 Copper-clad aluminum wires are used for the low voltage supply. Pure copper would be sturdier and more compact, but would increase the overall radiation length of the electrical service material. 12
16 Figure 14: Calculation of time over threshold(tot). If the amplified analog signal crosses the threshold value then a hit is registered. The ToT value measures the strength of the signal and is read out digitally.[10] Figure 15: Before type inversion (a) the electric field grows from the bottom and must reach up to the pixel implants for the sensor to be operational. After type inversion (b) the electric field grows from the top and allows operation even if the bulk is only partially depleted.[4] reflow 18 operation. A carrier wafer support element is used to prevent heat-induced bowing during bonding and is removed from the flip chip assembly during the final step. A flexible printed circuit board (flex) and wire bonds for external connections are then added to the bare module to create a flex module. The support staves have integrated cables into which the flex modules will directly connect; this technique reduces the amount of dead material in the detector compared to previous connection methods. A number of modules will be reserved for qualification and testing. Radiation tolerance testing will be done to ensure that hit efficiency and position resolution remains above the minimum required values after receiving expected levels of radiation. A burn-in program involving 50 thermal cycles between 40 C and -35 C with the power on will be carried out to verify that an acceptable fraction of channels remains live. A sample of wire bonds will be destructively pulled to track any change of bond strength throughout the assembly and test process. 18 Reflow refers to the process of first applying the bump bond metal in a patch then heating to 180 C. Surface tension causes the metal to form into a sphere. 13
17 Figure 16: Schematic showing an x-y cross-section of the IBL design.[4] 4.9 Installation During the planned LHC shut down in 2013 the ATLAS end caps will be removed (see Figure 1) to gain access to the ID. Before installing the IBL, a 7.3 m section of the existing beryllium 19 beam pipe will be removed. This involves disconnecting associated supports, flanges, collars and wires; special tooling has been developed for this delicate task. Each step will first be tested on a full scale mock-up of the Pixel Detector. In order to support the IBL during the insertion process an IBL Support Tube (IST) will first be inserted. The tooling to insert the IST must be able to remotely anchor it to the wire suspension system of the present beam pipe. 5 Commissioning Even though the IBL contains many unique components, it is designed to be a subsystem of the current Pixel Detector rather than a new sub-detector of its own. The technology and software that will be used to collect and process IBL data are shared with the Pixel Detector.[4] 19 Because of its low atomic number (4) beryllium is relatively transparent to ionizing radiation. 14
18 After installing the IBL, the various systems will be commissioned. For example, commissioning the cooling system involves verifying that the cooling fluid connections are within leakage tolerances, verifying the thermal properties (ability to dissipate heat) of the modules, and testing each part of the cooling system loop. It is important to verify that power cuts off automatically if the cooling system fails. Having power on without cooling could damage the IBL modules if the temperature exceeds 40 C. A calibration and tuning software suite will test the communication links, front-end electronics, sensors and modules. Basic checks verify functionality, such as the integrity of bump bonds, wire bonds and optical communication links. Calibration refers to measuring the basic functionality of the IBL. For example, leakage current is measured initially and then monitored throughout operation in order to keep track of radiation damage. Tuning refers to adjusting parameters to optimize functionality. For example, the discriminator threshold (the level at which a signal is considered a hit) can be set at a module by module and a pixel by pixel basis. It must be high enough to filter out noise but low enough to provide efficient hit detection. Before operation with the LHC beam, data will be taken from random noise triggers and cosmic rays. Random trigger data are useful for testing data flow through the complete readout chain. Cosmic ray data will be used to align the IBL with respect to the rest of ATLAS; this is valuable preparation for further tracker alignment with the LHC beam data. 6 Conclusion A vertex system capable of b tagging with a high degree of accuracy is essential for the physics goals of the ATLAS detector. Radiation damage seriously deteriorates the efficiency of the Pixel Detector s performance of this function. The IBL will restore full vertexing functionality to the Pixel Detector while also improving its resolution. Many novel engineering solutions have been developed for the design, manufacture and installation of the IBL. The current schedule plans for installation to take place in mid
19 A Appendix Bethe-Bloch formula is given by [ ( de dx = 2πN orem 2 e c 2 ρ Zz2 2me γ 2 v 2 ) W max Aβ 2 ln I 2 2β 2 δ 2 C ]. Z where 2πN o rem 2 e c 2 = MeVc 2 /g; x is the path length in g/cm 2 ; r e = e2 4πm ec = cm and is the classical electron radius; 2 m e is the electron mass; N o = mol 1 and is Avogadro s number; I is the effective ionization potential averaged over all electrons; Z is the atomic number of the medium; A is the atomic weight of the medium; ρ is the density of the medium; z is the charge of a traversing particle; β = v c, the velocity of the traversing particle in units of the speed of light; γ = 1 ; 1 β 2 δ is a density correction; C is a shell correction; and 2m W max = ec 2 βγ me M 1+β 2 γ 2 +( me M )2 is the maximum energy transfer possible in a single collision.[7] 16
20 References [1] The ATLAS Collaboration, The ATLAS Experiment at the CERN Large Hadron Collider, JINST 3 S08003, (2008). [2] J. Beringer et al. (Particle Data Group), The Review of Particle Physics, Phys. Rev. D86, (2012). [3] R. Kehoe, M. Narain and A. Kumar, Review of Top Quark Physics Results, Int. J. Mod. Phys. A 23, 353 (2008). [4] The ATLAS Collaboration, ATLAS Insertable B-Layer Technical Design Report, ATLAS- TDR-19, (2010). [5] L. Evans and P. Bryant, LHC Machine, JINST 3, S08001 (2008). [6] G. Aad et al. [ATLAS Collaboration], Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics, (2008). [7] G. Lutz, Semiconductor Radiation Detectors, Springer, Germany, (1999). [8] L. Rossi et al., Pixel Detectors, Springer, The Netherlands, (2006). [9] M. Karagounis et al., Development of the ATLAS FE-I4 pixel readout IC for b-layer Upgrade and Super-LHC, TWEPP proceedings, (2008). [10] M. Lindner et al., Comparison of hybrid pixel detectors with Si and GaAs sensors, Nuclear Inst. and Methods in Phys. Research A 466, 1 (2001). [11] T. Rohe, Sensor Concepts for Pixel Detectors in High Energy Physics.,
Non-collision Background Monitoring Using the Semi-Conductor Tracker of ATLAS at LHC
WDS'12 Proceedings of Contributed Papers, Part III, 142 146, 212. ISBN 978-8-7378-226-9 MATFYZPRESS Non-collision Background Monitoring Using the Semi-Conductor Tracker of ATLAS at LHC I. Chalupková, Z.
More informationComponents of a generic collider detector
Lecture 24 Components of a generic collider detector electrons - ionization + bremsstrahlung photons - pair production in high Z material charged hadrons - ionization + shower of secondary interactions
More informationMuon reconstruction performance in ATLAS at Run-2
2 Muon reconstruction performance in ATLAS at Run-2 Hannah Herde on behalf of the ATLAS Collaboration Brandeis University (US) E-mail: hannah.herde@cern.ch ATL-PHYS-PROC-205-2 5 October 205 The ATLAS muon
More informationPoS(Vertex 2016)004. ATLAS IBL operational experience
ATLAS IBL operational experience High Energy Accelerator Research Organization (KEK) - Oho Tsukuba Ibaraki, 0-080, Japan E-mail: yosuke.takubo@kek.jp The Insertable B-Layer (IBL) is the inner most pixel
More information(a) (b) Fig. 1 - The LEP/LHC tunnel map and (b) the CERN accelerator system.
Introduction One of the main events in the field of particle physics at the beginning of the next century will be the construction of the Large Hadron Collider (LHC). This machine will be installed into
More informationParticle detection 1
Particle detection 1 Recall Particle detectors Detectors usually specialize in: Tracking: measuring positions / trajectories / momenta of charged particles, e.g.: Silicon detectors Drift chambers Calorimetry:
More informationDesign of the new ATLAS Inner Tracker for the High Luminosity LHC era
Design of the new ATLAS Inner Tracker for the High Luminosity LHC era Trevor Vickey on behalf of the ATLAS Collaboration University of Sheffield, United Kingdom July 3, 2017 19th iworid Krakow, Poland
More informationCMS Note Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on CMS information server CMS NOTE 1996/005 The Compact Muon Solenoid Experiment CMS Note Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland Performance of the Silicon Detectors for the
More informationLHC status and upgrade plan (physics & detector) 17 3/30 Yosuke Takubo (KEK)
1 LHC status and upgrade plan (physics & detector) 17 3/30 Yosuke Takubo (KEK) ATLAS experiment in 2016 2 3 ATLAS experiment The experiment started in 2008. Discovered Higgs in 2012. Run-2 operation started
More informationPERFORMANCE OF THE ATLAS MUON TRIGGER IN RUN 2
PERFORMANCE OF THE ATLAS MUON TRIGGER IN RUN 2 M.M. Morgenstern On behalf of the ATLAS collaboration Nikhef, National institute for subatomic physics, Amsterdam, The Netherlands E-mail: a marcus.matthias.morgenstern@cern.ch
More informationExpected Performance of the ATLAS Inner Tracker at the High-Luminosity LHC
Expected Performance of the ATLAS Inner Tracker at the High-Luminosity LHC Matthias Hamer on behalf of the ATLAS collaboration Introduction The ATLAS Phase II Inner Tracker Expected Tracking Performance
More informationThe ATLAS C. Gemme, F.Parodi
The ATLAS Experiment@LHC C. Gemme, F.Parodi LHC physics test the Standard Model, hopefully find physics beyond SM find clues to the EWK symmetry breaking - Higgs(ses)? Standard Model is a gauge theory
More informationThe ATLAS Silicon Microstrip Tracker
9th 9th Topical Seminar on Innovative Particle and Radiation Detectors 23-26 May 2004 Siena3 The ATLAS Silicon Microstrip Tracker Zdenek Dolezal, Charles University at Prague, for the ATLAS SCT Collaboration
More informationRisultati dell esperimento ATLAS dopo il run 1 di LHC. C. Gemme (INFN Genova), F. Parodi (INFN/University Genova) Genova, 28 Maggio 2013
Risultati dell esperimento ATLAS dopo il run 1 di LHC C. Gemme (INFN Genova), F. Parodi (INFN/University Genova) Genova, 28 Maggio 2013 1 LHC physics Standard Model is a gauge theory based on the following
More information2 ATLAS operations and data taking
The ATLAS experiment: status report and recent results Ludovico Pontecorvo INFN - Roma and CERN on behalf of the ATLAS Collaboration 1 Introduction The ATLAS experiment was designed to explore a broad
More informationIdentifying Particle Trajectories in CMS using the Long Barrel Geometry
Identifying Particle Trajectories in CMS using the Long Barrel Geometry Angela Galvez 2010 NSF/REU Program Physics Department, University of Notre Dame Advisor: Kevin Lannon Abstract The Compact Muon Solenoid
More informationpp physics, RWTH, WS 2003/04, T.Hebbeker
3. PP TH 03/04 Accelerators and Detectors 1 pp physics, RWTH, WS 2003/04, T.Hebbeker 2003-12-16 1.2.4. (Inner) tracking and vertexing As we will see, mainly three types of tracking detectors are used:
More informationFuture prospects for the measurement of direct photons at the LHC
Future prospects for the measurement of direct photons at the LHC David Joffe on behalf of the and CMS Collaborations Southern Methodist University Department of Physics, 75275 Dallas, Texas, USA DOI:
More informationSolid State Detectors
Solid State Detectors Most material is taken from lectures by Michael Moll/CERN and Daniela Bortoletto/Purdue and the book Semiconductor Radiation Detectors by Gerhard Lutz. In gaseous detectors, a charged
More informationExperimental Methods of Particle Physics
Experimental Methods of Particle Physics (PHY461) Fall 015 Olaf Steinkamp 36-J- olafs@physik.uzh.ch 044 63 55763 Overview 1) Introduction / motivation measurement of particle momenta: magnetic field early
More informationTracking properties of the ATLAS Transition Radiation Tracker (TRT)
2 racking properties of the ALAS ransition Radiation racker (R) 3 4 5 6 D V Krasnopevtsev on behalf of ALAS R collaboration National Research Nuclear University MEPhI (Moscow Engineering Physics Institute),
More informationAIM AIM. Study of Rare Interactions. Discovery of New High Mass Particles. Energy 500GeV High precision Lots of events (high luminosity) Requirements
AIM AIM Discovery of New High Mass Particles Requirements Centre-of-Mass energy > 1000GeV High Coverage Study of Rare Interactions Requirements Energy 500GeV High precision Lots of events (high luminosity)
More informationPhysics studies to define the CMS muon detector upgrade for High-Luminosity LHC
IL NUOVO CIMENTO 40 C (2017) 85 DOI 10.1393/ncc/i2017-17085-6 Communications: SIF Congress 2016 Physics studies to define the CMS muon detector upgrade for High-Luminosity LHC L. Borgonovi( 1 )( 2 )( )
More informationATLAS EXPERIMENT : HOW THE DATA FLOWS. (Trigger, Computing, and Data Analysis)
ATLAS EXPERIMENT : HOW THE DATA FLOWS (Trigger, Computing, and Data Analysis) In order to process large volumes of data within nanosecond timescales, the trigger system is designed to select interesting
More informationHeavy Hadron Production and Spectroscopy at ATLAS
Heavy Hadron Production and Spectroscopy at ALAS Carlo Schiavi on behalf of the ALAS Collaboration INFN Sezione di Genova ALAS has studied heavy flavor production and measured the production cross sections
More informationChapter 2 Experimental Apparatus
Chapter 2 Experimental Apparatus 2.1 The Large Hadron Collider 2.1.1 Design The Large Hadron Collider (LHC) [1] was constructed between 1998 2008 at CERN, the European Centre for Nuclear Research. It occupies
More informationLecture 8. Detectors for Ionizing Particles
Lecture 8 Detectors for Ionizing Particles Content Introduction Overview of detector systems Sources of radiation Radioactive decay Cosmic Radiation Accelerators Interaction of Radiation with Matter General
More informationPoS(EPS-HEP 2013)508. CMS Detector: Performance Results. Speaker. I. Redondo * CIEMAT
: Performance Results * CIEMAT Av. Compluense 40 Madrid 28040, Spain E-mail: ignacio.redondo@ciemat.es The Compact Muon Solenoid (CMS) detector is one of the two multipurpose experiments at the Large Hadron
More informationTracking at the LHC. Pippa Wells, CERN
Tracking at the LHC Aims of central tracking at LHC Some basics influencing detector design Consequences for LHC tracker layout Measuring material before, during and after construction Pippa Wells, CERN
More informationIntroduction to the ATLAS Experiment at the LHC and its Upgrade for the High Luminosity LHC
Introduction to the ATLAS Experiment at the LHC and its Upgrade for the High Luminosity LHC Introduction The ATLAS Experiment Detector Technologies Phase-0 Phase-I Phase-II Digression: ATLAS and the Higgs
More informationThe ATLAS Detector - Inside Out Julia I. Hofmann
The ATLAS Detector - Inside Out Julia I. Hofmann KIP Heidelberg University Outline: 1st lecture: The Detector 2nd lecture: The Trigger 3rd lecture: The Analysis (mine) Motivation Physics Goals: Study Standard
More informationPhysics potential of ATLAS upgrades at HL-LHC
M.Testa on behalf of the ATLAS Collaboration INFN LNF, Italy E-mail: marianna.testa@lnf.infn.it ATL-PHYS-PROC-207-50 22 September 207 The High Luminosity-Large Hadron Collider (HL-LHC) is expected to start
More informationarxiv: v1 [hep-ex] 6 Jul 2007
Muon Identification at ALAS and Oliver Kortner Max-Planck-Institut für Physik, Föhringer Ring, D-005 München, Germany arxiv:0707.0905v1 [hep-ex] Jul 007 Abstract. Muonic final states will provide clean
More informationLuminosity determination in pp collisions using the ATLAS detector at the LHC
Luminosity determination in pp collisions using the ATLAS detector at the LHC Peilian LIU Lawrence Berkeley National Laboratory March 23, 2017 1 OutLine ATLAS experiment at LHC The past, present and future
More informationThe R&D for ATLAS pixels for slhc
The R&D for ATLAS pixels for slhc Marco Bomben LPNHE Outline Introduction LHC & ATLAS The LHC upgrade The Pixel upgrade The IBL project The R&D for a new Inner Detector: the Planar Pixel Sensor Upgrade
More informationStatus and Performance of the ATLAS Experiment
Status and Performance of the ATLAS Experiment P. Iengo To cite this version: P. Iengo. Status and Performance of the ATLAS Experiment. 15th International QCD Conference (QCD 10), Jun 2010, Montpellier,
More informationUpgrade of ATLAS and CMS for High Luminosity LHC: Detector performance and Physics potential
IL NUOVO CIMENTO 4 C (27) 8 DOI.393/ncc/i27-78-7 Colloquia: IFAE 26 Upgrade of ATLAS and CMS for High Luminosity LHC: Detector performance and Physics potential M. Testa LNF-INFN - Frascati (RM), Italy
More informationSemiconductor-Detectors
Semiconductor-Detectors 1 Motivation ~ 195: Discovery that pn-- junctions can be used to detect particles. Semiconductor detectors used for energy measurements ( Germanium) Since ~ 3 years: Semiconductor
More information2008 JINST 3 S Outlook. Chapter 11
Chapter 11 Outlook The broad range of physics opportunities and the demanding experimental environment of highluminosity 14 TeV proton-proton collisions have led to unprecedented performance requirements
More informationDevelopment of Radiation Hard Si Detectors
Development of Radiation Hard Si Detectors Dr. Ajay K. Srivastava On behalf of Detector Laboratory of the Institute for Experimental Physics University of Hamburg, D-22761, Germany. Ajay K. Srivastava
More informationTracking detectors for the LHC. Peter Kluit (NIKHEF)
Tracking detectors for the LHC Peter Kluit (NIKHEF) Overview lectures part I Principles of gaseous and solid state tracking detectors Tracking detectors at the LHC Drift chambers Silicon detectors Modeling
More informationThe Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland. Commissioning of the CMS Detector
Available on CMS information server CMS CR -2009/113 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland 15 May 2009 Commissioning of the CMS
More informationREADINESS OF THE CMS DETECTOR FOR FIRST DATA
READINESS OF THE CMS DETECTOR FOR FIRST DATA E. MESCHI for the CMS Collaboration CERN - CH1211 Geneva 23 - Switzerland The Compact Muon Solenoid Detector (CMS) completed the first phase of commissioning
More informationDigital Calorimetry for Future Linear Colliders. Tony Price University of Birmingham University of Birmingham PPE Seminar 13 th November 2013
Digital Calorimetry for Future Linear Colliders Tony Price University of Birmingham University of Birmingham PPE Seminar 13 th November 2013 Overview The ILC Digital Calorimetry The TPAC Sensor Electromagnetic
More informationTHE FLORIDA STATE UNIVERSITY COLLEGE OF ARTS & SCIENCES W BOSON PRODUCTION CHARGE ASYMMETRY IN THE ELECTRON CHANNEL ASHLEY S HUFF
THE FLORIDA STATE UNIVERSITY COLLEGE OF ARTS & SCIENCES W BOSON PRODUCTION CHARGE ASYMMETRY IN THE ELECTRON CHANNEL By ASHLEY S HUFF A Thesis submitted to the Department of Physics In partial fulfillment
More informationThe ATLAS Detector at the LHC
The ATLAS Detector at the LHC Results from the New Energy Frontier Cristina Oropeza Barrera Experimental Particle Physics University of Glasgow Somewhere near the Swiss Alps... A Toroidal LHC ApparatuS
More informationLecture 18. New gas detectors Solid state trackers
Lecture 18 New gas detectors Solid state trackers Time projection Chamber Full 3-D track reconstruction x-y from wires and segmented cathode of MWPC z from drift time de/dx information (extra) Drift over
More informationLHC Detectors and their Physics Potential. Nick Ellis PH Department, CERN, Geneva
LHC Detectors and their Physics Potential Nick Ellis PH Department, CERN, Geneva 1 Part 1 Introduction to the LHC Detector Requirements & Design Concepts 2 What is the Large Hadron Collider? Circular proton-proton
More informationPhysics at Hadron Colliders
Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD
More information4. LHC experiments Marcello Barisonzi LHC experiments August
4. LHC experiments 1 Summary from yesterday: Hadron colliders play an important role in particle physics discory but also precision measurements LHC will open up TeV energy range new particles with 3-5
More informationDiscovery of the W and Z 0 Bosons
Discovery of the W and Z 0 Bosons Status of the Standard Model ~1980 Planning the Search for W ± and Z 0 SppS, UA1 and UA2 The analyses and the observed events First measurements of W ± and Z 0 masses
More informationEnergetic particles and their detection in situ (particle detectors) Part II. George Gloeckler
Energetic particles and their detection in situ (particle detectors) Part II George Gloeckler University of Michigan, Ann Arbor, MI University of Maryland, College Park, MD Simple particle detectors Gas-filled
More informationModern Accelerators for High Energy Physics
Modern Accelerators for High Energy Physics 1. Types of collider beams 2. The Tevatron 3. HERA electron proton collider 4. The physics from colliders 5. Large Hadron Collider 6. Electron Colliders A.V.
More informationParticles and Universe: Particle detectors
Particles and Universe: Particle detectors Maria Krawczyk, Aleksander Filip Żarnecki March 31, 2015 M.Krawczyk, A.F.Żarnecki Particles and Universe 5 March 31, 2015 1 / 46 Lecture 5 1 Introduction 2 Ionization
More informationSearch for the Z Boson in the Dielectron Channel
Search for the Z Boson in the Dielectron Channel Sedrick Weinschenk 1,2 1 Physics Department, Columbia University 2 Physics and Astronomy Department, Butler University August 3, 2018 This paper discusses
More informationTutorial on Top-Quark Physics
Helmholtz Alliance at the Terascale Data Analysis Group Introductory School on Terascale Physics 21 25 February, 2011 Tutorial on Top-Quark Physics Introduction to the Tevatron, the CDF Detector and Top-Quark
More informationHiggs cross-sections
Ph.D. Detailed Research Project Search for a Standard Model Higgs boson in the H ZZ ( ) 4l decay channel at the ATLAS Experiment at Cern Ph.D. Candidate: Giacomo Artoni Supervisor: Prof. Carlo Dionisi,
More informationarxiv: v1 [physics.ins-det] 3 Dec 2018 Fast Interaction Trigger for the upgrade of the ALICE experiment at CERN: design and performance
arxiv:1812.00594v1 [physics.ins-det] 3 Dec 2018 Fast Interaction Trigger for the upgrade of the ALICE experiment at CERN: design and performance Alla Maevskaya for the ALICE collaboration 1, 1 Institute
More informationOctober 4, :33 ws-rv9x6 Book Title main page 1. Chapter 1. Measurement of Minimum Bias Observables with ATLAS
October 4, 2018 3:33 ws-rv9x6 Book Title main page 1 Chapter 1 Measurement of Minimum Bias Observables with ATLAS arxiv:1706.06151v2 [hep-ex] 23 Jun 2017 Jiri Kvita Joint Laboratory for Optics, Palacky
More informationParticles and Universe: Particle detectors
Particles and Universe: Particle detectors Maria Krawczyk, Aleksander Filip Żarnecki April 12, 2016 M.Krawczyk, A.F.Żarnecki Particles and Universe 5 April 12, 2016 1 / 49 Lecture 5 1 Introduction 2 Ionization
More informationParticle Detectors A brief introduction with emphasis on high energy physics applications
Particle Detectors A brief introduction with emphasis on high energy physics applications TRIUMF Summer Institute 2006 July 10-21 2006 Lecture I measurement of ionization and position Lecture II scintillation
More informationPerformance of muon and tau identification at ATLAS
ATL-PHYS-PROC-22-3 22/2/22 Performance of muon and tau identification at ATLAS On behalf of the ATLAS Collaboration University of Oregon E-mail: mansoora.shamim@cern.ch Charged leptons play an important
More informationFall Quarter 2010 UCSB Physics 225A & UCSD Physics 214 Homework 1
Fall Quarter 2010 UCSB Physics 225A & UCSD Physics 214 Homework 1 Problem 2 has nothing to do with what we have done in class. It introduces somewhat strange coordinates called rapidity and pseudorapidity
More informationb Physics Prospects For The LHCb Experiment Thomas Ruf for the LHCb Collaboration Introduction Detector Status Physics Program
b Physics Prospects For The LHCb Experiment Thomas Ruf for the LHCb Collaboration Introduction Detector Status Physics Program b Primary goal of the LHCb Experiment Search for New Physics contributions
More informationOptimizing Selection and Sensitivity Results for VV->lvqq, 6.5 pb -1, 13 TeV Data
1 Optimizing Selection and Sensitivity Results for VV->lvqq, 6.5 pb, 13 TeV Supervisor: Dr. Kalliopi Iordanidou 215 Columbia University REU Home Institution: High Point University 2 Summary Introduction
More informationLecture 2. Introduction to semiconductors Structures and characteristics in semiconductors
Lecture 2 Introduction to semiconductors Structures and characteristics in semiconductors Semiconductor p-n junction Metal Oxide Silicon structure Semiconductor contact Literature Glen F. Knoll, Radiation
More informationThe HL-LHC physics program
2013/12/16 Workshop on Future High Energy Circular Collider 1 The HL-LHC physics program Takanori Kono (KEK/Ochanomizu University) for the ATLAS & CMS Collaborations Workshop on Future High Energy Circular
More informationA brief history of accelerators, detectors and experiments: (See Chapter 14 and Appendix H in Rolnick.)
Physics 557 Lecture 7 A brief history of accelerators, detectors and experiments: (See Chapter 14 and Appendix H in Rolnick.) First came the study of the debris from cosmic rays (the God-given particle
More informationExcited Electron Search in the e eeγ Channel in ATLAS at S = 7 TeV
Excited Electron Search in the e eeγ Channel in ATLAS at S = 7 TeV Juliana Cherston August 5, 11 Abstract The discovery of an excited electron would provide evidence for the theory of compositeness. In
More informationInformation about the T9 beam line and experimental facilities
Information about the T9 beam line and experimental facilities The incoming proton beam from the PS accelerator impinges on the North target and thus produces the particles for the T9 beam line. The collisions
More informationATLAS New Small Wheel Phase I Upgrade: Detector and Electronics Performance Analysis
ATLAS New Small Wheel Phase I Upgrade: Detector and Electronics Performance Analysis Dominique Trischuk, Alain Bellerive and George Iakovidis IPP CERN Summer Student Supervisor August 216 Abstract The
More informationDetailed performance of the Outer Tracker at LHCb
Journal of Instrumentation OPEN ACCESS Detailed performance of the Outer Tracker at LHCb To cite this article: N Tuning Related content - Performance of the LHCb Outer Tracker - Improved performance of
More informationElementary Particle Physics Glossary. Course organiser: Dr Marcella Bona February 9, 2016
Elementary Particle Physics Glossary Course organiser: Dr Marcella Bona February 9, 2016 1 Contents 1 Terms A-C 5 1.1 Accelerator.............................. 5 1.2 Annihilation..............................
More informationExperimental Particle Physics
Experimental Particle Physics Particle Interactions and Detectors Lecture 2 2nd May 2014 Fergus Wilson, RAL 1/31 How do we detect particles? Particle Types Charged (e - /K - /π - ) Photons (γ) Electromagnetic
More informationATLAS Hadronic Calorimeters 101
ATLAS Hadronic Calorimeters 101 Hadronic showers ATLAS Hadronic Calorimeters Tile Calorimeter Hadronic Endcap Calorimeter Forward Calorimeter Noise and Dead Material First ATLAS Physics Meeting of the
More informationDEPFET sensors development for the Pixel Detector of BELLE II
DEPFET sensors development for the Pixel Detector of BELLE II 13 th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD13) 7 10 October 2013, Siena, Italy Paola Avella for the DEPFET collaboration
More informationInstrumentation for Flavor Physics - Lesson I
Instrumentation for Flavor Physics - Lesson I! Fisica delle Particelle Università di Milano a.a 2013/2014 Outline Lesson I Introduction Basics for detector design Vertex detectors Lesson II Tracking detectors
More informationCMS Note Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on CMS information server CMS NOTE 199/11 The Compact Muon Solenoid Experiment CMS Note Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland 11 February 199 Temperature dependence of the
More informationPeter Fischer, ziti, Universität Heidelberg. Silicon Detectors & Readout Electronics
Silicon Detectors and Readout Electronics Peter Fischer, ziti, Universität Heidelberg 1 Content of the Lecture (sorted by subject) Introduction: Applications of silicon detectors Requirements, measured
More informationQCD cross section measurements with the OPAL and ATLAS detectors
QCD cross section measurements with the OPAL and ATLAS detectors Abstract of Ph.D. dissertation Attila Krasznahorkay Jr. Supervisors: Dr. Dezső Horváth, Dr. Thorsten Wengler University of Debrecen Faculty
More informationHL-LHC Physics with CMS Paolo Giacomelli (INFN Bologna) Plenary ECFA meeting Friday, November 23rd, 2012
@ HL-LHC Physics with CMS Paolo Giacomelli (INFN Bologna) Plenary ECFA meeting Friday, November 23rd, 2012 Many thanks to several colleagues, in particular: M. Klute and J. Varela Outline Where we stand
More informationATLAS NOTE. August 25, Electron Identification Studies for the Level 1 Trigger Upgrade. Abstract
Draft version 1.0 ATLAS NOTE August 25, 2012 1 Electron Identification Studies for the Level 1 Trigger Upgrade 2 3 4 L. Feremenga a, M.-A. Pleier b, F. Lanni b a University of Texas at Arlington b Brookhaven
More informationTHE ATLAS TRIGGER SYSTEM UPGRADE AND PERFORMANCE IN RUN 2
THE ATLAS TRIGGER SYSTEM UPGRADE AND PERFORMANCE IN RUN 2 S. Shaw a on behalf of the ATLAS Collaboration University of Manchester E-mail: a savanna.marie.shaw@cern.ch The ATLAS trigger has been used very
More informationFATRAS. A Novel Fast Track Simulation Engine for the ATLAS Experiment. Sebastian Fleischmann on behalf of the ATLAS Collaboration
A Novel Fast Track Engine for the ATLAS Experiment on behalf of the ATLAS Collaboration Physikalisches Institut University of Bonn February 26th 2010 ACAT 2010 Jaipur, India 1 The ATLAS detector Fast detector
More informationA NEW TECHNIQUE FOR DETERMINING CHARGE AND MOMENTUM OF ELECTRONS AND POSITRONS USING CALORIMETRY AND SILICON TRACKING. Qun Fan & Arie Bodek
A NEW TECHNIQUE FOR DETERMINING CHARGE AND MOMENTUM OF ELECTRONS AND POSITRONS USING CALORIMETRY AND SILICON TRACKING Qun Fan & Arie Bodek Department of Physics and Astronomy University of Rochester Rochester,
More informationAlignment of the ATLAS Inner Detector tracking system
Alignment of the ALAS Inner Detector tracking system Oleg BRAND University of Oxford and University of Göttingen E-mail: oleg.brandt@cern.ch he Large Hadron Collider (LHC) at CERN is the world largest
More informationPoS(DIS 2010)058. ATLAS Forward Detectors. Andrew Brandt University of Texas, Arlington
University of Texas, Arlington E-mail: brandta@uta.edu A brief description of the ATLAS forward detectors is given. XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects April
More informationIntroduction of CMS Detector. Ijaz Ahmed National Centre for Physics, Islamabad
Introduction of CMS Detector Ijaz Ahmed National Centre for Physics, Islamabad Layout of my Lectures: 1) Introduction of CMS Detector 2) CMS sub-detectors 3) CMS Trigger System Contents Introduction of
More informationarxiv:hep-ex/ v1 31 Dec 2001
DETECTORS AS A FUNCTION OF LUMINOSITY AT e + e MACHINES G. Eigen Dept. of Physics, University of Bergen, Allegaten 55, N-7 Bergen, Norway E-mail: eigen@asfys.fi.uib.no The performance of silicon-strip
More informationLuminosity measurement in ATLAS with Diamond Beam Monitor
University of Ljubljana Faculty of Mathematics and Physics Luminosity measurement in ATLAS with Diamond Beam Monitor PhD topic defense Supervisor Candidate Prof. dr. Marko Mikuž Luka Kanjir October 14th,
More informationPoS(HCP2009)042. Status of the ALICE Experiment. Werner Riegler. For the ALICE Collaboration. CERN
Status of the ALICE Experiment CERN E-mail: Werner.Riegler@cern.ch For the ALICE Collaboration ALICE is a general-purpose heavy-ion experiment designed to study the physics of strongly interacting matter
More informationPerformance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties
EUROPEAN ORGANISAION FOR NUCLEAR RESEARCH (CERN) JINS 12 (2017) P05002 DOI: 10.1088/1748-0221/12/05/P05002 11th May 2017 arxiv:1702.06473v2 [hep-ex] 10 May 2017 Performance of the ALAS ransition Radiation
More informationAlignment of the ATLAS Inner Detector Tracking System
Alignment of the ATLAS Inner Detector Tracking System Department of Physics and Astronomy, University of Pennsylvania E-mail: johnda@hep.upenn.edu These proceedings present the track-based method of aligning
More informationTevatron Experimental Issues at High Luminosities
Karlsruhe Institute for Technology E-mail: michal.kreps@kit.edu In this paper we describe the detector components, triggers and analysis techniques for flavor physics at the Tevatron experiments CDF and
More informationBackground Analysis Columbia University REU 2015
Background Analysis Columbia University REU 2015 Kylee Branning Northern Michigan University Adviser: Dr. Kalliopi Iordanidou July 31, 2015 Abstract This study focuses on the development of data driven
More informationThe Fast Interaction Trigger Upgrade for ALICE
Chicago State University, Chicago, USA E-mail: edmundo.garcia@csu.edu On Behalf of the ALICE Collaboration The ALICE Collaboration is preparing a major detector upgrade for the second LHC long shutdown
More informationThe ALICE Forward Multiplicity Detector from Design to Installation. Christian Holm Christensen
The ALICE Forward Multiplicity Detector from Design to Installation Overview Matter and the Quark Gluon Plasma Heavy Ion Collisions and ALICE The Forward Multiplicity Detector: Motivation, sensors, electronics,
More informationLecture 2 & 3. Particles going through matter. Collider Detectors. PDG chapter 27 Kleinknecht chapters: PDG chapter 28 Kleinknecht chapters:
Lecture 2 & 3 Particles going through matter PDG chapter 27 Kleinknecht chapters: 1.2.1 for charged particles 1.2.2 for photons 1.2.3 bremsstrahlung for electrons Collider Detectors PDG chapter 28 Kleinknecht
More informationBrief Report from the Tevatron. 1 Introduction. Manfred Paulini Lawrence Berkeley National Laboratory Berkeley, California 94720
Brief Report from the Lawrence Berkeley National Laboratory Berkeley, California 9472 1 Introduction It might appear surprising to include a report from the Fermilab, a proton-antiproton collider, in a
More informationThe achievements of the CERN proton antiproton collider
The achievements of the CERN proton antiproton collider Luigi DiLella Scuola Normale Superiore, Pisa, Italy Motivation of the project The proton antiproton collider UA1 and UA2 detectors Discovery of the
More information