Micro-pattern gaseous detectors
|
|
- Horatio Cox
- 6 years ago
- Views:
Transcription
1 Nuclear Instruments and Methods in Physics Research A 494 (2002) Micro-pattern gaseous detectors L. Shekhtman* Budker Institute of Nuclear Physics, Acad. Lavrentiev prospect 11, Novosibirsk, Russia Abstract Introduced at the end of 1980s micro-pattern gas detectors perform much better than classic wire chambers. They allow to achieve both excellent localization accuracy and high rate capability that make this technology attractive for charged particle tracking at high luminosity colliders. During its evolution micro-pattern gas technology gave raise to many different types of devices such as micro-strip gas chambers, MicroMEGAS, CAT and gas electron multipliers. Essential improvements in the performance of the detectors were achieved especially in what concerned long-term performance: aging and resistance to accidental discharges. r 2002 Elsevier Science B.V. All rights reserved. Keywords: Micro-pattern gas detectors; MSGC; MicroMEGAS; GEM; Tracking 1. Introduction At the end of 1980s before starting of highluminosity hadron collider projects it was commonly understood that gas wire technique cannot realize full potential of gaseous detectors, namely in simultaneous high spatial resolution and rate capability. Intrinsic properties of commonly used gas mixtures allowed spatial resolution of below 50 m: However the large size of amplification cell with sense wire in the center could not provide rate capability of more than 10 khz=mm 2 : The solution was to put a micro-structure produced with micro-lithography technique into the gas. Small amplification cell in such a case could provide both high spatial resolution and rate capability at the same time. The idea in the form of micro-stripgas chambers was first proposed by Oed in 1988 [1] for neutron detection and then was modified for the *Tel.: ; fax: address: l.i.shekhtman@inp.nsk.su (L. Shekhtman). needs of charge particle detection by groups from INFN Pisa [2] and NIKHEF [3]. Later the concept in general got the name of micro-pattern gaseous detector and many different types of those were proposed during the last 14 years. Despite the many types of micro-structures that are proposed for the micro-pattern devices, major properties of the latter are determined by the gas mixture and the gapwidth used for the detection of charged particles (Fig. 1). From Fig. 1 we see that both spatial and time resolution of these devices depend mostly on the statistics of primary charge clusters deposited by a relativistic charged particle. Micro-pattern structure is used for amplification of the primary electrons and readout of the induced amplified signal and can thus also affect partly space and time resolution. Small size of amplification cell of a micro-pattern structure provides fast removal of positive ions and low space charge effects at high rates /02/$ - see front matter r 2002 Elsevier Science B.V. All rights reserved. PII: S (02)
2 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) Fig. 1. General layout of a micro-pattern gaseous detector. Charged particle track leaves primary charge clusters in the conversion gap. Electrons drift towards amplification microstructure that can consist of several stages. Amplified electron component of the primary ionization induces charge at the readout micro-structure. In this review we consider different types of the micro-pattern gaseous detectors according to production technology and layout of the microstructure. Main performance parameters will be analyzed and solutions for most common problems will be discussed. Fig. 2. Schematic view of the MSGC with equipotentials and field lines computed close to the substrate. The back-plane potential has been selected to prevent field lines entering the dielectric. 2. Micro-strip gas chambers The micro-stripgas chambers (MSGC) consist of thin parallel metal strips, deposited on an insulating support and alternatively connected as anodes and cathodes. Fig. 2 shows a schematic view of this device with electric field lines and equipotentials computed with anodes and backplane at equal potentials. Accurate but simple photolithography can achieve a distance between electrodes of 100 mm; i.e. improving granularity by another order of magnitude over that of wire chambers. Fig. 2 shows that at appropriate choice of potentials all field lines from the drift region terminate on thin anode strip. However, avalanche is spread broader than anode width (usually about 10 mm) and large fraction of positive ions is collected to the neighboring cathode strips. This effect reduces space charge accumulation and provides much higher intrinsic rate capability than classic devices can. High gains for a wide range of gas mixtures, electrodes geometry and types of substrate have Fig. 3. Examples of absolute gain measured, as a function of anode voltage, in several mixtures of noble gases and dimethyl ether. been obtained [4 6]. Fig. 3 shows one example of absolute gain measured as a function of anode voltage in several mixtures of noble gases and dimethyl ether [7]. Several improvements of the micro-strip technology have been proposed mainly towards twodimensional readout and more compact avalanche region. This can be achieved by putting the anode stripon topof thin (several microns thick) insulating layer deposited on top of properly
3 130 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) segmented cathode metal layer. Such a structure was called microgapchamber (MGC) [8,9]. Large gains, above 10 4 have been demonstrated with a MGC. Mixtures of neon and dimethyl ether seem to be particularly advantageous. Another approach utilizing more complicated photolithography process, namely the microdot chamber [10 12], consists of a dense pattern of individual proportional counters made up of anode dots surrounded by annular cathodes. Field Fig. 4. Schematics of the microdot chamber. defining rings can be added to improve the operation, as shown in Fig Detectors with parallel-plate amplification region The evolution of wire chambers and, in particular, asymmetric multiwire proportional devices has led to the invention of another micro-pattern concept. It has been recently suggested that in submillimeter gaps with strong uniform electric field exceptionally large gains could be attained. This has led to the introduction of the micromesh gaseous chamber (micromegas) [13], shown in Fig. 5. The detector consists of a thin metal grid stretched at a very small distance, mm; above a readout electrode. With very high field applied across the gap, typically above 30 kv=cm; electrons released in the upper drift region are collected and multiplied. The micromegas exploits the saturating characteristics of the Townsend coefficient at very high field to reduce the dependence of gain on the gap variations, thus improving the uniformity and stability of response over a large area. Thanks to the small gapand Fig. 5. Schematics and electric field in the micromegas. A metallic micromesh separates a low-field region from the high-field multiplication region.
4 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) Fig. 6. Gain as a function of the mesh voltage in the micromegas with 50 mm amplification gap. Fig. 7. Schematics and field mapin the CAT cell. high field, positive ions move very quickly and most are collected to the cathode mesh. This induces very fast signals with very small ion tail, ns wide, and prevents space-charge accumulation in the drift region. Very high gains have been demonstrated with the micromegas (Fig. 6) showing even the possibility of efficient single electron detection [14]. 4. PCBdetectors and gas electron multiplier The gain of a parallel-plate counter depends exponentially on the gap thickness, making it difficult to obtain a uniform response over large areas. In the compteur a trous (CAT) holes drilled through a metal insulator sandwich concentrate the field lines converging from a drift volume into a region of high field, where charge multiplication occurs (Fig. 7) [15]. This idea combines the concept of parallel-plate chamber with intrinsically uniform spacer allowing uniform gains over large surfaces. Even with relatively large holes, the collection and focusing properties of the field result in good energy resolution at proportional gains up to 10 4 : Combining the idea of multistepavalanche chamber [16] and CAT, Sauli proposed a new micro-pattern structure called gas electron multiplier (GEM) [17]. It consists of a thin, metal-clad polymer foil chemically perforated by a high density of holes, typically 100=mm 2 (Fig. 8). As shown in Fig. 8, with a suitable choice of voltages, all electrons released by ionization in the Fig. 8. Schematic structure of the gas electron multiplier with electric field lines and equipotentials shown. overlying gas layer are sucked into the holes, where charge multiplication occurs in the high electric field. the gain is a property of the GEM structure and is only mildly affected by the external fields, considerably relaxing the mechanical requirements. Systematic research efforts have enabled GEM devices to achieve proportional gains upto 10 4 ; suitable for direct detection of ionization on simple charge-collecting printed circuit board (PCB) electrodes. GEM foil can work as a distributed preamplifier allowing cascaded devices with several GEMs or with GEM combined with active read-out structure such as MSGC. The cascaded device permits much higher gains, or, for given required gain,
5 132 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) allows operation of amplifying elements at much lower voltages. In Fig. 9 the schematics of a double GEM detector is shown with typical dimensions indicated in the caption [18]. Examples of gain dependence as a function of GEM voltage and for several argon-based gas mixtures for triple-gem device are shown in Fig. 10 [19]. In this case for all three GEMs voltages were kept the same. CAT and GEM structures started another family of devices that can be called PCB detectors. These devices can be manufactured using simple and cheap lithography process applied for printed circuit boards. Two examples of such devices are micro-groove [20,21] and WELL [22] detectors shown in Figs. 11 and 12. As one can see from the figures both microgroove and WELL detectors realize the CAT principle in micro-scale. 5. Main properties of the micro-pattern gaseous detectors Main properties of the micro-pattern gas detectors are determined by the gas mixture and thickness of the conversion region. Among others we will discuss parameters of high importance for the detection of relativistic charged particles, such as efficiency, spatial resolution, time resolution and rate capability Signal and efficiency Fig. 9. Schematic structure of the double-gem detector. High-energy charged particle penetrating through a thin gas layer exhibit a limited number of interactions with the gas molecules forming primary charge clusters. Fig. 10. Gain as a function of GEM voltage for triple-gem detector. Voltages across all 3 GEMs have been kept the same.
6 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) Fig. 11. Micro-groove detector. Fig. 12. WELL detector. If the gas layer is thin, the probability of zero charge deposition becomes non-negligible. Thus, in order to get efficiency close to 100% the detector has to provide high enough amplification to detect as small number of primary clusters as possible, and the gas layer has to be thick enough. Typical example of the deposited charge distribution together with efficiency dependence on the operational voltage is shown for micromegas in Fig. 13 [23]. The measurement of efficiency with very thin gas layers was reported by several groups (see for example, Ref. [24]). It was found that even for the most dense gases such as dimetyl ether or isobutane, efficiency cannot be higher than 95% for the gas layer thickness of less than 2 mm: An example of such measurements is presented in Fig. 14 [24] Spatial resolution Delta-electrons formed along a charged particle s track in the sensitive volume, are distributed isotropically in solid angle. Also when primary charge clusters drift towards the readout and amplifying structure they exhibit diffusion. Thus, spatial resolution of an MPGD is determined by the combination of gas density, its electron
7 134 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) Fig. 13. Signal distribution and efficiency as a function of operational voltage for the MICROMEGAS. Fig. 14. Efficiency as a function of incident angle for MSGC with different gas mixtures and thickness of the gas layer. transport properties and sampling structure (i.e. pitch of the readout structure). Complete simulation of the spatial resolution for different gas layer thickness and pitch of the readout structure for particular gas mixture was performed in Ref. [25] (Fig. 15). Sampling with a readout pitch podx; where dx is RMS of electron distribution, yields optimal position information, as long as the individual signals, reduced in amplitude due to the division of the total charge over dx=p channels, surpass the threshold. The case when p > dx; results in a cluster width covering one stripand p ffiffiffiffiffi thus a position resolution equals p= 12 (left figure). For thick gas layer and large amount of electrons
8 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) Fig. 15. MSGC position resolution versus pitch p (left figure) and the gas gap L (right figure). In the left figure L ¼ 2 mm for the solid curve and L ¼ 5 mm for the dashed curve; in the right figure p ¼ 150 mm for the solid curve and p ¼ 200 mm for the dashed curve. Gas mixture Ar DME CO 2 ( ). this result we can see that for realistic case with the pitch below 400 mm and gas layer thickness below 3 mm one can get spatial resolution well below 100 mm: Typical example of the experimental result obtained with double GEM detector is shown in Fig. 16 [26]. Previous discussion relates to the orthogonal incidence of tracks on the detector plane. However, when a track is inclined with respect to the detector, the position resolution is strongly affected, as the projection of track on the readout plane is detected. Thus the width of the charge distribution induced at the readout structure is proportional to tan y: Typical experimental result showing the dependence of spatial resolution on the track incident angle is presented in Fig. 17 for the micromegas [23]. Fig. 16. Distribution of the differences between fitted track position and charge cluster position (residuals) for double GEM detector. Readout pitch is 400 mm; thickness of the gas layer is 3 mm: Gas mixture is Ar CO 2 (70 30). Sigma of the gaussian fit equals 38 mm: in a primary cluster its width due to the diffusion is compensated by the improvement of electron statistics, so that position resolution is saturated at an optimal value. However, for small gaps position accuracy is getting worse due to large variations of charge and non-uniform distribution of ionization along the track (right figure). From 5.3. Time resolution Time resolution of an MPGD is determined by fluctuations of the induced charge pulse and depends on the arrival time of the first primary cluster. Thus, the faster and more dense is the gas, the better is time resolution. In order to detect the first arrived cluster, gas amplification has to be high enough. Also, shaping time of the front-end amplifier plays an obvious role, it has to be of the order of 10 ns: Typical results that can be obtained for the fastest gas mixtures and regular gains
9 136 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) Fig. 17. Spatial resolution as a function of track incident angle for micromegas. Thickness of the gas layer is 2 mm: Fig. 18. Time resolution of double GEM detector. Gas mixture is Ar CO 2 (70 30). (10,000) are about 10 ns [26,27]. One of those is shown in Fig. 18. The best result reported for MPGD is time resolution of 3 ns; obtained for triple GEM detector filled with gas mixture enriched with CF 4 [28] Gain stability and rate capability Presence of an insulator close to the amplification region led to gain instabilities in the MSGC. Polarization processes and surface charge deposition caused significant changes of gain after application of potentials and irradiation with high-intensity particle flux. These instabilities could be corrected with proper choice of potentials on drift and back electrodes [29,30] or avoided completely with partially conductive substrate [31,32]. This problem was almost completely solved in micromegas where insulator is present in very limited amount as spacers and does not make any effect on gain at high rates [13]. In PCB detectors and GEM the kapton walls are always surround holes or grooves. They, however, are not exactly in the amplification region but rather around it. Some slight charging effect is observed Fig. 19. Gain instability of the micro-groove detector with time after application of potentials at different gains. in these devices as shown in Fig. 19 for microgroove detector [20]. Rate capability of the MPGD is determined by space charge and surface charge effects. However, while for MSGC surface charge effects played significant role (see, for example, Fig. 20, Ref. [31]), for modern types of micro-pattern detectors, such as micromegas and GEM, it is not the case any more. In Fig. 20 we see that gain dropin
10 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) MSGC depends on the resistivity of the substrate due to surface charging. If the substrate has low enough resistivity, the dominating is space-charge effect that cause smooth dropof gain when the rate is higher than certain limit ( s 1 mm 2 for 8 kev X-rays in Ar at a gain of B1000). This behavior of MSGC with rate looks very much like that of wire chambers but at 2 orders of magnitude higher scale. Unlike MSGC, micromegas and GEM detectors have very different gain-rate performance that is associated with uniform field in amplification region rather than cylindrical as in case of the MSGC. The gain stays stable upto very high rates, as shown in Fig. 21 [18], and the measurements are usually stopped due to a discharge. Systematic measurement of such effect was performed by the micromegas group in Ref. [33]. Fig. 22 from this paper presents the limits of gain-rate curves where the discharge occurred. It looks like when the charge flow (i.e. the product of particle flux and gain) exceeds certain threshold, the amplification gap is discharging. However, the limits found in all the cases are far beyond the requirements of any particle physics experiment. 6. Main problems and solutions Fig. 20. Rate capability of MSGC with resistive substrates. Despite their promising performance, experience with MPGD has raised doubts about long-term Fig. 21. Rate capability of GEM detector at different gains.
11 138 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) behavior. Two major problems, their relevance depending on the application, have arisen: rare but often damaging discharges, and slow but continuous deterioration (aging) during sustained irradiation. Fig. 22. Discharge limits of gain-rate dependencies for micro- MEGAS Induced discharges Discharges during operation are permanent problem with all micro-pattern detectors. Whenever the total charge in the avalanche exceeds a value between 10 7 and 10 8 electron ion pairs (Raether s limit), an enhancement of the electric field in front and behind the primary avalanche induces the fast growth of a long, filament-like streamer. At the gains required for the detection of minimum ionizing particles in thin gaps, typically above 2000, the accidental release of larger amounts of ionization easily brings the total charge above the limit. Large and high-density ionization can be released in gas by slow heavy particles that appear due to hadronic interactions in the material of the detector exposed to high energy hadron beam. Various schemes have been proposed to limit the probability of an induced discharge and the damage caused by it. We will mention two of them: coating the edges of amplifying structure with polymide insulator (advanced passivation) [26] and the distribution of amplification between several GEM pre-amplifying stages [18]. Successful use of advanced passivation of MSGC was reported by one group [34,35], and it provided effective suppression of the induced discharges up Fig. 23. Probability of discharge as a function of absolute gain in single- double- and triple-gem detectors.
12 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) to the gains of about Adding GEM before other amplifying structures [36,37] or using multi- GEM structures with PCB readout [18] has been proved to be effective way of induced discharges suppression. Example of the performance of multi- GEM structures in an environment with heavily ionizing alpha particles injected into the gas volume of the detector is shown in Fig. 23. The probability of a discharge as a function of absolute gain demonstrates clear advantage of multi-gem detectors with respect to the single- GEM one. This example suggests that Raether s limit is not a constant, but rather depends on the electric field value. Each stage of a multi-stage system operates at lower field providing higher total discharge gain limit Aging Fig. 24. Gain dropunder sustained irradiation of microstrip plates manufactured on insulating and semiconducting substrates, for different stripmetals. Aging, the slow degradation of performance during sustained irradiation, is a problem encountered with most gaseous counters and has been extensively studied experimentally [38]. The observed permanent damage of the detectors has been imputed to the production of polymeric compounds in the avalanches, which stick to the electrodes or to the insulator, perturbing the signal detection and inducing discharges. MSGC are particularly prone to ageing, possibly because of the small effective area used for charge multiplication. In Fig. 24 an example of aging under sustained irradiation of MSGC with different material of electrodes is shown. Several experimental observations show that micromegas and GEM detectors are much less than MSGC sensitive to particular conditions of Fig. 25. Gain as a function of accumulated charge in large double-gem detector prepared for COMPASS experiment at CERN [41].
13 140 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) the measurements: cleanliness of the system and material of the electrodes. An example of the performance of large multi-gem detector is shown in Fig. 25, where no degradation is detected upto 7 mc=mm 2 [39]. Similar result has been obtained for micromegas [40]. Possible explanation of such stable performance proposed by authors of Ref. [39] suggests that, as avalanche appears far from any electrode or insulator in the parallel plate gap or in a GEM hole, polymer products are deposited much slower than in MSGC. 7. Summary and conclusions In the 10 years since the introduction of the microstripchamber, an amazingly large number of studies have aimed to understand the new detector and to improve their performance. Although successful in experimental setups requiring moderate proportional gains, MSGC turned out to be prone to irreversible damage under harsher experimental conditions. Several new micro-pattern concepts increase reliability while preserving or even improving performance. These new detectors include CAT and PCB detectors, micro- MEGAS and the GEM. Manufactured with rather conventional technologies, the new devices are cheaper than microstrip chambers and free of their size limitations. The GEM has the unique feature of preamplification and transfer of charge essentially preserving the ionization pattern into the subsequent stepof amplification. Sharing the required gain between several stages, each operated at a voltage well below the discharge limit, appears to be a reliable solution to the problems of single-stage devices. Micro-pattern gaseous detectors possess unique combination of features such as: spatial resolution of less than 100 mm; rate capability of higher than 10 5 mm 2 s 1 at a gain of about 10,000, time resolution down to 3 ns and good aging properties. These set of features together with cheapand reliable manufacturing technology makes MPGD a good candidate to fill the gap between solid state vertex detectors and large wire chambers. References [1] A. Oed, Nucl. Instr. and Meth. A 263 (1988) 351. [2] F. Angelini, et al., Nucl. Instr. and Meth. A 283 (1989) 755. [3] F.G. Hartjes, et al., Nucl. Instr. and Meth. A 315 (1992) 529. [4] C. Budtz-Jorgensen, Rev. Sci. Instr. 63 (1992) 648. [5] R. Bouclier, et al., Nucl. Instr. and Meth. A 365 (1995) 65. [6] O. Bouhali, et al., Nucl. Instr. and Meth. A 378 (1996) 438. [7] T. Beckers, et al., Nucl. Instr. and Meth. A 346 (1994) 195. [8] F. Angelini, et al., Nucl. Instr. and Meth. A 335 (1993) 69. [9] F. Angelini, et al., Nucl. Instr. and Meth. A 349 (1995) 273. [10] S.F. Biagi, T.J. Jones, Nucl. Instr. and Meth. A 361 (1995) 72. [11] S.F. Biagi, et al., Nucl. Instr. and Meth. A 392 (1997) 131. [12] S.F. Biagi, et al., Nucl. Instr. and Meth. A 371 (1995) 12. [13] I. Giomataris, et al., Nucl. Instr. and Meth. A 376 (1996) 29. [14] A. Delbart, et al., New development of micromegas detector, Nucl. Instr. and Meth. A 461 (2001) 84. [15] F. Bartol, et al., J. Phys. III France 6 (1996) 337. [16] G. Charpak, F. Sauli, Phys. Lett. B 72 (1978) 523. [17] F. Sauli, Nucl. Instr. and Meth. A 386 (1997) 531. [18] A. Bressan, et al., Nucl. Instr. and Meth. A 424 (1999) 321. [19] S. Bachmann, et al., Discharge studies and prevention in the gas electron multiplier, CERN-EP [20] R. Bellazzini, et al., Nucl. Instr. and Meth. A 424 (1999) 444. [21] S. Keller, et al., Nucl. Instr. and Meth. A 419 (1998) 382. [22] R. Bellazzini, et al., Nucl. Instr. and Meth. A 423 (1999) 125. [23] G. Barouch, et al., Nucl. Instr. and Meth. A 423 (1999) 32. [24] F. Angelini, et al., Nucl. Instr. and Meth. A 360 (1995) 22. [25] J. Schmitz, Nucl. Instr. and Meth. A 323 (1992) 638. [26] A. Bressan, et al., Nucl. Instr. and Meth. A 425 (1999) 262. [27] D. Tres, et al., Nucl. Instr. and Meth. A 461 (2001) 29. [28] H. Poli-Lener, et al., A systematic study of the performance of a Triple GEM detector for high rate charged particle triggering, Nucl. Instr. and Meth. A 494 (2002), these proceedings. [29] R. Bouclier, et al., Nucl. Instr. and Meth. A 367 (1995) 168. [30] J.E. Bateman, J.F. Connoly, RAL [31] R. Bouclier, et al., Nucl. Instr. and Meth. A 332 (1993) 100. [32] Y.N. Pestov, L.I. Shekhtman, Nucl. Instr. and Meth. A 338 (1994) 368. [33] I. Giomataris, et al., Nucl. Instr. and Meth. A 419 (1998) 239. [34] R. Bellazzini, et al., Nucl. Instr. and Meth. A 398 (1998) 426. [35] R. Bellazzini, et al., Nucl. Instr. and Meth. A 457 (2001) 22.
14 L. Shekhtman / Nuclear Instruments and Methods in Physics Research A 494 (2002) [36] A. Bressan, Nucl. Instr. and Meth. A 424 (1998) 321. [37] A. Bondar, et al., Nucl. Instr. and Meth. A 454 (2000) 315. [38] M. Hohlmann, Aging problem in wire chambers, Nucl. Instr. and Meth. A 494 (2002), these proceedings. [39] M.C. Altunbas et al., Aging measurements with the gas electron multiplier (GEM), CERN-EP [40] J. Miyamoto, et al., Aging study of Micromegas þ GEM; presented at the Workshop on Aging Phenomena in Gaseous Detectors, September 2001, DESY, Germany, Nucl. Instr. and Meth., to be published. [41] B. Ketzer, et al., IEEE Trans. Nucl. Sci. NS-48 (2001) 1065.
Breakdown limit studies in high-rate gaseous detectors
Nuclear Instruments and Methods in Physics Research A 422 (1999) 300 304 Breakdown limit studies in high-rate gaseous detectors Yu. Ivaniouchenkov, P. Fonte, V. Peskov *, B.D. Ramsey LIP, Coimbra University,
More informationElectron transparency, ion transparency and ion feedback of a 3M GEM
Nuclear Instruments and Methods in Physics Research A 525 (2004) 33 37 Electron transparency, ion transparency and ion feedback of a 3M GEM P.S. Barbeau a, J. Collar a, J. Miyamoto b, *, I. Shipsey b a
More informationNEW DEVELOPMENTS IN GASEOUS DETECTORS. Fabio Sauli. CERN, Geneva, Switzerland
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN-EP/2000-108 July 20, 2000 NEW DEVELOPMENTS IN GASEOUS DETECTORS Fabio Sauli CERN, Geneva, Switzerland Invited lecture at the XXVIII International Meeting
More informationGEM: A new concept for electron amplification in gas detectors
GEM: A new concept for electron amplification in gas detectors F. Sauli, Nucl. Instr. & Methods in Physics Research A 386 (1997) 531-534 Contents 1. Introduction 2. Two-step amplification: MWPC combined
More informationarxiv:physics/ v2 27 Mar 2001
High pressure operation of the triple-gem detector in pure Ne, Ar and Xe A. Bondar, A. Buzulutskov, L. Shekhtman arxiv:physics/0103082 v2 27 Mar 2001 Budker Institute of Nuclear Physics, 630090 Novosibirsk,
More informationGEM at CERN. Leszek Ropelewski CERN PH-DT2 DT2-ST & TOTEM
GEM at CERN Leszek Ropelewski CERN PH-DT2 DT2-ST & TOTEM MicroStrip Gas Chamber Semiconductor industry technology: Photolithography Etching Coating Doping A. Oed Nucl. Instr. and Meth. A263 (1988) 351.
More informationAdvances in the Micro-Hole & Strip Plate gaseous detector
Nuclear Instruments and Methods in Physics Research A 504 (2003) 364 368 Advances in the Micro-Hole & Strip Plate gaseous detector J.M. Maia a,b,c, *, J.F.C.A. Veloso a, J.M.F. dos Santos a, A. Breskin
More informationSimulating the Charge Dispersion Phenomena in Micro Pattern Gas Detectors with a Resistive Anode
Simulating the Charge Dispersion Phenomena in Micro Pattern Gas Detectors with a Resistive Anode M. S. Dixit a b and A. Rankin a a Department of Physics Carleton University 1125 Colonel By Drive Ottawa
More informationA fast triple GEM detector for high-rate charged-particle triggering
Nuclear Instruments and Methods in Physics Research A 478 (2002) 245 249 A fast triple GEM detector for high-rate charged-particle triggering G. Bencivenni a, W. Bonivento b,1, C. Bosio c, A. Cardini b,
More informationGEM-based photon detector for RICH applications
Nuclear Instruments and Methods in Physics Research A 535 (2004) 324 329 www.elsevier.com/locate/nima GEM-based photon detector for RICH applications Thomas Meinschad, Leszek Ropelewski, Fabio Sauli CERN,
More informationPerformance of a triple-gem detector for high-rate particle triggering
Performance of a triple-gem detector for high-rate particle triggering G. Bencivenni 1, W. Bonivento 2,4,A.Cardini 2,C. Deplano 2, P. de Simone 1, G. Felici 1, D. Marras 2, F.Murtas 1, D.Pinci 2,3, M.
More informationEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH GAS DETECTORS: ACHIEVEMENTS AND TRENDS. Fabio Sauli. CERN, CH-1211 Geneva, Switzerland ABSTRACT
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH GAS DETECTORS: ACHIEVEMENTS AND TRENDS Fabio Sauli CERN, CH-1211 Geneva, Switzerland CERN-EP/2000-080 19 June 2000 ABSTRACT We describe recent developments of
More informationGas Electron Multiplier detectors with high reliability and stability. Abstract. Introduction
Gas Electron Multiplier detectors with high reliability and stability B.M.Ovchinnikov 1, V.V.Parusov 1 and Yu.B.Ovchinnikov 2 1 Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia
More informationA Complete Simulation of a Triple-GEM Detector
1638 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 49, NO. 4, AUGUST 2002 A Complete Simulation of a Triple-GEM Detector W. Bonivento, A. Cardini, G. Bencivenni, F. Murtas, and D. Pinci Abstract Since some
More informationPoS(EPS-HEP2015)232. Performance of a 1 m 2 Micromegas Detector Using Argon and Neon based Drift Gases
Performance of a m Micromegas Detector Using Argon and Neon based Drift Gases a, Otmar Biebel a, Jonathan Bortfeldt a, Ralf Hertenberger a, Ralph Müller a and Andre Zibell b a Ludwig-Maximilians-Universität
More informationMicro Pixel Chamber with resistive electrodes for spark reduction
Micro Pixel Chamber with resistive electrodes for spark reduction arxiv:1310.5550v1 [physics.ins-det] 21 Oct 2013 Atsuhiko Ochi a, Yuki Edo a, Yasuhiro Homma a, Hidetoshi Komai a and Takahiro Yamaguchi
More informationDevelopment of New MicroStrip Gas Chambers for X-ray Applications
Joint International Workshop: Nuclear Technology and Society Needs for Next Generation Development of New MicroStrip Gas Chambers for X-ray Applications H.Niko and H.Takahashi Nuclear Engineering and Management,
More informationMICROMEGAS Signal: Numerical Simulation Based on Neon-Isobutane and Neon-DME
Modern Instrumentation, 2015, 4, 1-9 Published Online January 2015 in SciRes. http://www.scirp.org/journal/mi http://dx.doi.org/10.4236/mi.2015.41001 MICROMEGAS Signal: Numerical Simulation Based on Neon-Isobutane
More information3 Gaseous Detectors. Detectors for Particle Physics Manfred Krammer Institute for High Energy Physics, Vienna, Austria
3 Gaseous Detectors Detectors for Particle Physics Manfred Krammer Institute for High Energy Physics, Vienna, Austria 3 Gaseous Detectors Content 3.1 Basic Principles 3.2 Diffusion and Drift 3.3 Amplification
More informationA new detector for neutron beam monitoring
A new detector for neutron beam monitoring European Organization for Nuclear Research (CERN), Geneva, Switzerland in collaboration with Commissariat à l Energie Atomique (CEA), Saclay, France, Instituto
More informationPrecision Calibration of Large Area Micromegas Detectors Using Cosmic Muons
Precision Calibration of Large Area Micromegas Detectors Using Cosmic Muons a, Otmar Biebel a, Jonathan Bortfeldt b, Bernhard Flierl a, Maximilian Herrmann a, Ralf Hertenberger a, Felix Klitzner a, Ralph
More informationPHOTOELECTRON COLLECTION EFFICIENCY AT HIGH PRESSURE FOR A GAMMA DETECTOR ENVISAGING MEDICAL IMAGING
822 PHOTOELECTRON COLLECTION EFFICIENCY AT HIGH PRESSURE FOR A GAMMA DETECTOR ENVISAGING MEDICAL IMAGING C.D.R. Azevedo 1, C.A.B. Oliveira 1, J.M.F. dos Santos 2, J.F.C.A. Veloso 1 1.University of Aveiro,
More informationAngular resolution of the gaseous micro-pixel detector Gossip
1 Angular resolution of the gaseous micro-pixel detector Gossip Y. Bilevych a,v. Blanco Carballo a, M. van Dijk a, M. Fransen a, H. van der Graaf a, F. Hartjes a *, N. Hessey a, W. Koppert a, S. Nauta
More informationTrack Resolution Measurements for a Time Projection Chamber with Gas Electron Multiplier Readout
Track Resolution Measurements for a Time Projection Chamber with Gas Electron Multiplier Readout Dean Karlen 1,2, Paul Poffenberger 1, Gabe Rosenbaum 1, Robert Carnegie 3, Madhu Dixit 3,2, Hans Mes 3,
More informationCCD readout of GEM-based neutron detectors
Nuclear Instruments and Methods in Physics Research A 478 (2002) 357 361 CCD readout of GEM-based neutron detectors F.A.F. Fraga a, *, L.M.S. Margato a, S.T.G. Fetal a, M.M.F.R. Fraga a, R. Ferreira Marques
More informationParticle Energy Loss in Matter
Particle Energy Loss in Matter Charged particles, except electrons, loose energy when passing through material via atomic excitation and ionization These are protons, pions, muons, The energy loss can
More informationGAS DETECTORS: RECENT DEVELOPMENTS AND FUTURE PERSPECTIVES
EUROPEAN LABORATORY FOR PARTICLE PHYSICS CERN-EP/98-51 26 March 1998 GAS DETECTORS: RECENT DEVELOPMENTS AND FUTURE PERSPECTIVES Fabio Sauli CERN, Geneva, Switzerland ABSTRACT Thirty years after the invention
More informationPerformance of high pressure Xe/TMA in GEMs for neutron and X-ray detection
Performance of high pressure Xe/TMA in GEMs for neutron and X-ray detection R. Kreuger, C. W. E. van Eijk, Member, IEEE, F. A. F. Fraga, M. M. Fraga, S. T. G. Fetal, R. W. Hollander, Member, IEEE, L. M.
More informationIonization Detectors
Ionization Detectors Basic operation Charged particle passes through a gas (argon, air, ) and ionizes it Electrons and ions are collected by the detector anode and cathode Often there is secondary ionization
More informationDetectors in Nuclear and High Energy Physics. RHIG summer student meeting June 2014
Detectors in Nuclear and High Energy Physics RHIG summer student meeting June 2014 Physics or Knowledge of Nature Experimental Data Analysis Theory ( application) Experimental Data Initial Conditions /
More informationX-ray ionization yields and energy spectra in liquid argon
X-ray ionization yields and energy spectra in liquid argon A. Bondar, a,b A. Buzulutskov, a,b,* A. Dolgov, b L. Shekhtman, a,b A. Sokolov a,b a Budker Institute of Nuclear Physics SB RAS, Lavrentiev avenue
More informationA Triple-GEM Telescope for the TOTEM Experiment
A Triple-GEM Telescope for the TOTEM Experiment Giuseppe Latino (Siena University & Pisa INFN) IPRD06 Siena October 4, 2006 TOTEM Experiment @ LHC T2 Telescope 3-GEM Technology Detailed Detector Simulation
More informationRecent developments on Micro-Pattern Gaseous Detectors
IL NUOVO CIMENTO Vol. 32 C, N. 3-4 Maggio-Agosto 2009 DOI 10.1393/ncc/i2009-10450-4 Colloquia: IFAE 2009 Recent developments on Micro-Pattern Gaseous Detectors M. Alfonsi( ) CERN - CH-1211 Geneva 23, Switzerland
More informationSiberian Branch of Russian Academy of Science. A. Buzulutskov, A. Bondar, L. Shekhtman, R. Snopkov, Yu. Tikhonov
Siberian Branch of Russian Academy of Science BUDKER INSTITUTE OF NUCLEAR PHYSICS A. Buzulutskov, A. Bondar, L. Shekhtman, R. Snopkov, Yu. Tikhonov FIRST RESULTS FROM CRYOGENIC AVALANCHE DETECTOR BASED
More informationA complete simulation of a triple-gem detector
A complete simulation of a triple-gem detector W. Bonivento, A. Cardini, D. Pinci Abstract Since some years the Gas Electron Multipliers (GEM) based detectors have been proposed for many different applications,
More informationRecent advances in gaseous imaging photomultipliers
Nuclear Instruments and Methods in Physics Research A 513 (2003) 250 255 Recent advances in gaseous imaging photomultipliers A. Breskin*, M. Balcerzyk 1, R. Chechik, G.P. Guedes 2, J. Maia 3,D.M.ormann
More informationX-ray ionization yields and energy spectra in liquid argon
E-print arxiv:1505.02296 X-ray ionization yields and energy spectra in liquid argon A. Bondar, a,b A. Buzulutskov, a,b,* A. Dolgov, b L. Shekhtman, a,b A. Sokolov a,b a Budker Institute of Nuclear Physics
More informationR&D on Astroparticles Detectors. (Activity on CSN )
R&D on Astroparticles Detectors (Activity on CSN5 2000-2003) Introduction Results obtained with the R&D activity (2000-2003) with some drift chambers prototypes are reported. With different photocathode
More informationRecent advances in gaseous imaging photomultipliers
Elsevier Science 1 Journal logo Recent advances in gaseous imaging photomultipliers A.Breskin a, M. Balcerzyk 1, R. Chechik, G. P. Guedes 2, J. Maia 3 and D. Mörmann Department of Particle Physics The
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 informationMICROMEGAS PERFORMANCE BASED IN ARGON- ISOBUTANE AND ARGON-DEMETHYL-ETHER
MICROMEGAS PERFORMANCE BASED IN ARGON- ISOBUTANE AND ARGON-DEMETHYL-ETHER Hamid Mounir Mustapha Haddad Laboratory Spectrometry of Materials and Archaeomaterials (LASMAR), Faculty of Science, Moulay Ismail
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 informationNuclear Instruments and Methods in Physics Research A
Nuclear Instruments and Methods in Physics Research A 712 (2013) 8 112 Contents lists available at SciVerse ScienceDirect Nuclear Instruments and Methods in Physics Research A journal homepage: www.elsevier.com/locate/nima
More informationMicro Pattern Gaseous Detectors (MPGDs) Technology
Micro Pattern Gaseous Detectors (MPGDs) Technology Kondo Gnanvo University of Virginia Tech Transfer Workshop @ CUA, Washington DC, January 2018 Outline Introduction to Micro Pattern Gaseous Detectors
More informationSimulation of GEM-TPC Prototype for the Super-FRS Beam Diagnostics System at FAIR
Progress in NUCLEAR SCIENCE and TECHNOLOGY, Vol. 2, pp.401-405 (2011) ARTICLE Simulation of GEM-TPC Prototype for the Super-FRS Beam Diagnostics System at FAIR Matti KALLIOKOSKI * Helsinki Institute of
More informationGeneric Detector. Layers of Detector Systems around Collision Point
Generic Detector Layers of Detector Systems around Collision Point Tracking Detectors Observe particle trajectories in space with as little disturbance as possible 2 use a thin ( gm. cm ) detector Scintillators
More informationNeutron imaging with a Micromegas detector
Neutron imaging with a Micromegas detector S Andriamonje A, V. Dangendorf B, I. Espagnon C, H. Friedrich B, A. Giganon A, I. Giomataris A, F. Jeanneau C *, R. Junca C, A. Menelle D, J. Pancin A, A. Pluquet
More informationDetecting low energy recoils with Micromegas
Detecting low energy recoils with Micromegas Giomataris Ioannis, DAPNIA-Saclay Principle, performance Low threshold results Axion-WIMP search, polarimetry Large gaseous TPC Conclusions 1 40 kv/cm 1 kv/cm
More informationLABORATÓRIO DE INSTRUMENTAÇÃO E FÍSICA EXPERIMENTAL DE PARTÍCULAS
LABORATÓRIO DE INSTRUMENTAÇÃO E FÍSICA EXPERIMENTAL DE PARTÍCULAS Preprint LIP/1-5 23 May 21 Fundamentals of Gas Micropattern Detectors V. Peskov 1,*, P. Fonte 2,3, M. Danielsson 1, C. Iacobaeus 4, J.
More informationIonization Detectors. Mostly Gaseous Detectors
Ionization Detectors Mostly Gaseous Detectors Introduction Ionization detectors were the first electrical devices developed for radiation detection During the first half of the century: 3 basic types of
More informationGEM operation in helium and neon at low temperatures
E-print physics/0504184 Accepted for publishing in Nuclear Instruments and Methods A GEM operation in helium and neon at low temperatures A. Buzulutskov a, J. Dodd b, R. Galea b, Y. Ju b, M. Leltchouk
More informationLecture # 3. Muhammad Irfan Asghar National Centre for Physics. First School on LHC physics
Lecture # 3 Muhammad Irfan Asghar National Centre for Physics Introduction Gaseous detectors Greater mobility of electrons Obvious medium Charged particles detection Particle information easily transformed
More informationEvaluation and reduction of ion back-flow in multi-gem detectors
Evaluation and reduction of ion back-flow in multi-gem detectors D. Mörmann, A. Breskin, R. Chechik and D. Bloch 1 Department of Particle Physics, The Weizmann Institute of Science, 76100 Rehovot, Israel
More informationStudy of GEM-like detectors with resistive electrodes for RICH applications
Study of GEM-like detectors with resistive electrodes for RICH applications A.G. Agócs, 1,2 A. Di Mauro, 3 A. Ben David, 4 B. Clark, 5 P. Martinengo, 3 E. Nappi, 6 3, 7 V. Peskov 1 Eotvos University, Budapest,
More informationImprovement of Spatial Resolution by Selfconsistent Full Muon Track Reconstruction in Gaseous Detectors
Improvement of Spatial Resolution by Selfconsistent Full Muon Track Reconstruction in Gaseous Detectors a, Otmar Biebel a, Maximilian Herrmann a, Ralf Hertenberger a, Felix Klitzner a, Philipp Lösel a,
More informationPerformance of triple GEM tracking detectors in the COMPASS experiment
Nuclear Instruments and Methods in Physics Research A 535 (24) 314 318 www.elsevier.com/locate/nima Performance of triple tracking detectors in the COMPASS experiment B. Ketzer a,, Q. Weitzel a, S. Paul
More informationThe Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on CMS information server CMS CR -2018/225 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland 27 September 2018 (v2, 19 November
More informationA proposal to study gas gain fluctuations in Micromegas detectors
A proposal to study gas gain fluctuations in Micromegas detectors M. Chefdeville 15/05/2009 We present two methods to measure gas gain fluctuations in Micromegas detectors and the experimental setup that
More informationDevelopment of a Time Projection Chamber with GEM technology in IMP. Herun yang Gas detector group
Development of a Time Projection Chamber with GEM technology in IMP Herun yang Gas detector group Outline Introduction TPC prototype based on GEM performance test based cosmic ray Beam test Summary Gas
More informationarxiv: v1 [physics.ins-det] 28 Mar 2016
Combination of two Gas Electron Multipliers and a Micromegas as gain elements for a time projection chamber arxiv:1603.08473v1 [physics.ins-det] 28 Mar 2016 S. Aiola a, R.J. Ehlers a, S. Gu a, J.W. Harris
More informationRPCs and applications to the Particle Physics
RPCs and applications to the Particle Physics 5th Particle Physics Workshop Islamabad 20-25 Nov 2006 By R. Santonico Basic detector physics Gaseous detectors brief history Primary Ionization Uniform field
More informationSpatial Resolution of a Micromegas-TPC Using the Charge Dispersion Signal
25 International Linear Collider Workshop - Stanford, U.S.A. Spatial Resolution of a Micromegas-TPC Using the Charge Dispersion Signal A. Bellerive, K. Boudjemline, R. Carnegie, M. Dixit, J. Miyamoto,
More informationResearch Article Analytic Approximation of Energy Resolution in Cascaded Gaseous Detectors
Advances in High Energy Physics Volume 216, Article ID 561743, pages http://dx.doi.org/1.1155/216/561743 Research Article Analytic Approximation of Energy Resolution in Cascaded Gaseous Detectors Dezsy
More informationGEM-based gaseous photomultipliers for UV and visible photon imaging
GEM-based gaseous photomultipliers for UV and visible photon imaging D. Mörmann, M. Balcerzyk 1, A. Breskin, R. Chechik, B.K. Singh 2 A. Buzulutskov 3 Department of Particle Physics, The Weizmann Institute
More informationR&D and related Simulation Studies for the sphenix Time Projection Chamber
R&D and related Simulation Studies for the sphenix Time Projection Chamber, for the sphenix collaboration Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 1179-8,
More informationTwo-phase argon and xenon avalanche detectors based on Gas Electron Multipliers
E-print at www.arxiv.org physics/0510266 Accepted for publication in Nuclear Instruments and Methods A Two-phase argon and xenon avalanche detectors based on Gas Electron Multipliers A. Bondar, A. Buzulutskov,
More informationGaseous and gasless pixel detectors
Available online at www.sciencedirect.com Physics Procedia 17 (2011) 224 231 Physics of Fundamental Symmetries and Interactions PSI2010 Gaseous and gasless pixel detectors Harry van der Graaf Nikhef, Science
More informationTwo-phase and gaseous cryogenic avalanche detectors based on GEMs
Two-phase and gaseous cryogenic avalanche detectors based on GEMs Budker Institute of Nuclear Physics, Novosibirsk A. Bondar, A. Buzulutskov, A. Grebenuk, D. Pavlyuchenko, R. Snopkov, Y. Tikhonov Outline
More informationDevelopment of gaseous PMT with micropattern gas detector
Development of gaseous PMT with micropattern gas detector Fuyuki Tokanai Department of Physics, Yamagata University, Yamagata, Japan Takayuki Sumiyoshi [Tokyo Metropolitan University, Tokyo 192-0397, Japan
More informationDischarge studies in Micromegas detectors in low energy hadron beams
Discharge studies in Micromegas detectors in low energy hadron beams G. Charles a, M. Anfreville b, S. Aune b, J. Ball a, Y. Bedfer a, M. Boyer b, P. Konczykowski a, F. Kunne a, C. Lahonde-Hamdoun b, L.
More informationPart II. Momentum Measurement in B Field. Contribution from Multiple Scattering. Relative Momentum Error
Part II Momentum Measurement in B Field Momentum is determined by measurement of track curvature κ = 1 ρ in B field: Use of Track Detectors for Momentum Measurement Gas Detectors - Proportional Chamber
More informationCharge ampli"cation and transfer processes in the gas electron multiplier
Nuclear Instruments and Methods in Physics Research A 438 (1999) 376}408 Charge ampli"cation and transfer processes in the gas electron multiplier S. Bachmann, A. Bressan, L. Ropelewski, F. Sauli *, A.
More informationarxiv:hep-ex/ v1 16 Dec 2000
Optimization of drift gases for accuracy in pressurized drift tubes arxiv:hep-ex/1v1 1 Dec J. J. Kirchner, U. J. Becker, R. B. Dinner, K. J. Fidkowski, and J. H. Wyatt Abstract Massachusetts Institute
More information3D Simulation of Electron and Ion Transmission of GEM-based Detectors
3D Simulation of Electron and Ion Transmission of GEM-based Detectors arxiv:1710.00607v1 [physics.ins-det] 2 Oct 2017 Purba Bhattacharya a 1, Bedangadas Mohanty a, Supratik Mukhopadhyay b, Nayana Majumdar
More informationResults with Micromegas modules at LP-TPC
Results with Micromegas modules at LP-TPC D. Attié 1, P. Colas 1, M. Dixit 2,3, M. Riallot 1, YunHa Shin 2, S. Turnbull 2, W. Wang *1 Abstract For the International Linear Collider (ILC), the transverse
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 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 informationChapter 3 Gas Filled Detectors
Med Phys 4RA3, 4RB3/6R03 Radioisotopes and Radiation Methodology 3-1 Chapter 3 Gas Filled Detectors 3.1. Ionization chamber A. Ionization process and charge collection The interactions of charged particles
More informationThe Cylindrical GEM detector for the KLOE-2 Inner Tracker
The Cylindrical GEM detector for the KLOE-2 Inner Tracker G. Morello on behalf of the KLOE-2 IT group Exploring Hadron Structure with Tagged Structure Functions, January 18th, Newport News (VA) KLOE-2
More informationSpatial resolution of a MPGD TPC using the charge dispersion signal
Spatial resolution of a MPGD TPC using the charge dispersion signal Madhu Dixit Carleton University & TRIUMF Carleton University University of Montreal LAL Orsay CEA Saclay A. Bellerive, K. Boudjemline,
More informationPerformance study of the ceramic THGEM *
Performance study of the ceramic THGEM * YAN Jia-Qing 1,2;1) XIE Yu-Guang 2,3;2) HU Tao 2,3 LU Jun-Guang 2,3 ZHOU Li 2,3 QU Guo-Pu 1 CAI Xiao 2,3 NIU Shun-Li 2,3 CHEN Hai-Tao 2 1 University of South China,
More informationDetector Physics of Resistive Plate Chambers
Detector Physics of Resistive Plate Chambers Introduction Simulation of RPCs Time Resolution Efficiency Charge Spectra Detailed 2-D simulations of single avalanches Rate effects Summary Work in collaboration
More informationSpatial resolution measurement of Triple-GEM detector and diffraction imaging test at synchrotron radiation
Spatial resolution measurement of Triple-GEM detector and diffraction imaging test at synchrotron radiation Y.L. Zhang, a,b,c H.R. Qi, b,c Z.W. Wen, a,b,c H.Y. Wang, b,c,d Q. Ouyang, b,c Y.B. Chen, b,c
More informationSummer Student Project: GEM Simulation and Gas Mixture Characterization
Summer Student Project: GEM Simulation and Gas Mixture Characterization Juan Felipe Oviedo Perhavec Abstract This project is a numerical simulation approach to Gas Electron Multiplier (GEM) detectors design.
More informationMomentum Measurement in B Field. Part II. Relative Momentum Error. Contribution from Multiple Scattering
Part II Momentum Measurement in B Field Momentum is determined by measurement of track curvature κ = 1 ρ in B field: Use of Track Detectors for Momentum Measurement Gas Detectors - Proportional Chamber
More informationarxiv: v1 [physics.ins-det] 29 Jun 2011
Performance simulation of a MRPC-based PET Imaging System arxiv:1106.5877v1 [physics.ins-det] 29 Jun 2011 A. Banerjee, S. Chattopadhyay April 16, 2018 Abstract The low cost and high resolution gas-based
More informationarxiv:physics/ v1 [physics.ins-det] 2 Aug 2000
Two Large-Area Anode-Pad MICROMEGAS Chambers as the basic elements of a Pre-Shower Detector arxiv:physics/083v1 [physics.ins-det] 2 Aug 20 L. Aphecetche, H. Delagrange, D. G. d Enterria, M. Le Guay, X.
More informationEEE4106Z Radiation Interactions & Detection
EEE4106Z Radiation Interactions & Detection 2. Radiation Detection Dr. Steve Peterson 5.14 RW James Department of Physics University of Cape Town steve.peterson@uct.ac.za May 06, 2015 EEE4106Z :: Radiation
More informationPHYS 3446 Lecture #12
PHYS 3446 Lecture #12 Wednesday, Oct. 18, 2006 Dr. 1. Particle Detection Ionization Detectors MWPC Scintillation Counters Time of Flight 1 Announcements Next LPCC Workshop Preparation work Each group to
More informationSignals in Particle Detectors (1/2?)
Signals in Particle Detectors (1/2?) Werner Riegler, CERN CERN Detector Seminar, 5.9.2008 The principle mechanisms and formulas for signal generation in particle detectors are reviewed. As examples the
More informationSpace Charge Effects in Resistive Plate Chambers
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN) CERN-EP/3- May 3 Space Charge Effects in Resistive Plate Chambers Christian Lippmann ) and Werner Riegler ) Abstract We extend an existing one dimensional
More informationAn estimation of the effective number of electrons contributing to the coordinate measurement with a TPC II
An estimation of the effective number of electrons contributing to the coordinate measurement with a TPC II Makoto Kobayashi High Energy Accelerator Research Organization (KEK), Tsukuba, 35-81, Japan arxiv:134.916v3
More informationParticle Energy Loss in Matter
Particle Energy Loss in Matter Charged particles loose energy when passing through material via atomic excitation and ionization These are protons, pions, muons, The energy loss can be described for moderately
More informationIntroduction. Principle of Operation
Introduction Ionizing radiation that is associated with radioactivity cannot be directly detected by our senses. Ionization is the process whereby the radiation has sufficient energy to strip electrons
More informationMicroscopic Simulation of GEM Signals
Microscopic Simulation of GEM Signals von Moritz Seidel Bachelorarbeit in Physik vorgelegt der Fakultät für Mathematik, Informatik und Naturwissenschaften der RWTH Aachen angefertigt im III. Physikalischen
More informationDevelopment and preliminary tests of resistive microdot and microstrip detectors
Development and preliminary tests of resistive microdot and microstrip detectors P. Fonte, a E. Nappi b, P. Martinengo c, R. Oliveira c, V. Peskov c,d,*, F. Pietropaolo e, P. Picchi f a LIP and ISEC, Coimbra,
More informationPHY492: Nuclear & Particle Physics. Lecture 25. Particle Detectors
PHY492: Nuclear & Particle Physics Lecture 25 Particle Detectors http://pdg.lbl.gov/2006/reviews/contents_sports.html S(T ) = dt dx nz = ρa 0 Units for energy loss Minimum ionization in thin solids Z/A
More informationarxiv:physics/ v2 [physics.ins-det] 31 Oct 2003
arxiv:physics/37152v2 [physics.ins-det] 31 Oct 23 Position Sensing from Charge Dispersion in Micro-Pattern Gas Detectors with a Resistive Anode M. S. Dixit a,d,, J. Dubeau b, J.-P. Martin c and K. Sachs
More informationInvestigation of GEM space point resolution for a TPC tracker
Investigation of GEM space point resolution for a TPC tracker Dean Karlen / Carleton University Carleton GEM group: Bob Carnegie, Madhu Dixit, Jacques Dubeau, Dean Karlen, Hans Mes, Morley O'Neill, Ernie
More informationGas Chamber. (for the HERMES collaboration) Nationaal Instituut voor Kernfysica en Hoge-Energiefysica, NIKHEF
HERMES 97-34 Performance of the HERMES Micro-Strip Gas Chamber J.J. van Hunen 1 (for the HERMES collaboration) Nationaal Instituut voor Kernfysica en Hoge-Energiefysica, NIKHEF Postbus 41882, 19 DB Amsterdam,
More information