R.W. Aßmann, CERN SL-AP Snowmass 2001 July 7 th, 2001

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "R.W. Aßmann, CERN SL-AP Snowmass 2001 July 7 th, 2001"

Transcription

1 R.W. Aßmann, CERN SL-AP Snowmass 2001 July 7 th, 2001

2 (almost a Higgs) November 2 nd, 2000, 7am

3 We can do this precision e+ephysics at the high-energy frontier! Push beyond 209 GeV at LEP (for the Higgs, ) Problem: This talk: Compare and recommend Sorry, folks: This is up to you

4 1. Introduction The LC design studies Simulation codes Beam dynamics beam energy 2. Single particle dynamics Optics design Example lattices Dispersion and energy spread 3. Multi-particle dynamics Transverse wakefield BNS damping SLC as the reference Emittance/wakefield optimization Predicted LC performance Required component performance 4. Transverse beam stability Predictions for LC designs LEP experience Stability studies (vibration damping) 5. Multi-bunch effects Knowledge of long-range wakefield Multi-bunch emittance growth Effects production errors/damage 6. Conclusion

5 This talk: It is not: Discuss some design choices Explain some trade-offs Illustrate some beam dynamics topics Use of simple example lattices, estimates Include some detailed, published LC studies A detailed review of all issues (would be a book) Common simulations for the three designs Any judgment on the different approaches Greg Loews International LC Study Group Talk based on my direct experience with SLC, CLIC, and NLC. But, more importantly: The work of many, many colleagues! Acknowledgements to all of them, especially: TESLA: R. Brinkmann and colleagues CLIC: D. Schulte, G. Guignard and colleagues NLC: T. Raubenheimer, P. Tenenbaum, A. Seryi and colleagues SLC: The old gang

6 The main linacs: The heart of linear colliders. Their crucial mission for the success of linear colliders: Provide beam energy of interest for physics Issues: High efficiency High accelerating gradients Reliable RF system Minimize cost per MV Transport high current and small emittance beams for high luminosity Issues: Transverse emittance dilution Energy sharpness, stability Transverse position stability Tails and beam losses Beam dynamics

7 TESLA SLC NLC/JLC CLIC (stage II) C.M. energy GeV Luminosity cm -2 s Frequency GHz Iris radius mm Gradient MV/m Bunch popul # bunches f rep Hz ge x (inj) mm-mrad ge y (inj) mm-mrad Basic scaling: Luminosity ~ Energy 2

8 Linac performance (static) characterized with: Beam current Transverse emittances Energy spread γε γε + γε + final inj disp γε wf Tolerance: γε disp + γε wf γε Wakefields ~ f 3 Beam parameters Tolerances on: Straightness of trajectory Centering in RF structures inj Required luminosity mm-mrad (SLC) mm-mrad (NLC/JLC) mm-mrad (TESLA) mm-mrad (CLIC) High gradient (high frequency) allows high beam energies, for the price of more stringent tolerances on alignment Tolerances scale with 1/f J.P. Delahaye et al For an optimized design

9 Test accelerators cannot test linac performance. Predict linac performance based on simulation codes Programs used in the context of linear collider studies: LIAR MAFIA TRANSPORT SAD MAD GUINEAPIG MERLIN TraFIC 4 MUSTAFA PLACET Q URMEL DIMAD GDFIDL LEGO WAKE TRACK FFADA PARMELA FLUKA GEANT CAIN OMEGA3P TAU3P HFSS PHI3P + many others (some nameless heroes) Computational activity for linear colliders is: manifold and redundant Especially: LIAR written for and tested against SLC linac Incorporates lot of experience from SLC Used for cross-checks of other programs (e.g. PLACET)

10 Beam energy is a crucial parameter for linear collider design. Target energy or energy range set by particle physics! Choice of technology determines the energy range: TESLA: JLC/NLC: CLIC: up to 800 GeV up to 1000 GeV up to 3000 GeV Linear collider design is not energy-independent Comparison of designs for different energies can be misleading! Compare designs for the same beam energy (G. Loew et al).

11 1. Introduction The LC design studies Simulation codes Beam dynamics beam energy 2. Single particle dynamics Optics design Example lattices Dispersion and energy spread 3. Multi-particle dynamics Transverse wakefield BNS damping SLC as the reference Emittance/wakefield optimization Predicted LC performance Required component performance 4. Transverse beam stability Predictions for LC designs LEP experience Stability studies (vibration damping) 5. Multi-bunch effects Knowledge of long-range wakefield Multi-bunch emittance growth Effects production errors/damage 6. Conclusion

12 1) Provide focusing for beam transport (no real challenge, FODO) 2) Minimize effects from kicks (wakefield) on the beam Offset y at s 2 due to kick at s 1 y( s2) = R12( s1, s2) θ ( s1) R = 12 β 1 β 2 E E 1 2 sin ( ψ ) Keep design beam size at s 2 constant (b 2 =const) For a given kick: y( s β 2 ) 1 Stronger focusing helps if kick amplitude does not depend on linac optics (wakefield kicks, injection errors) Weaker focusing helps for dispersive quadrupole kicks. (fewer quadrupole kicks)

13 TDR Dispersion-dominated optics design Wakefield-dominated optics design TESLA (.5 TeV) CLIC (3 TeV) NLC (1 TeV) Yellow report ZDR

14 y cell l b l b (250 GeV example) 72º m ~ 40 m CLIC 80º m ~ 80 m JLC/NLC 60º m ~ 360 m TESLA Note: CLIC below 45 m for 250 GeV TESLA more sensitive to ground motion waves with Long wavelength Low frequency Larger amplitude

15 Not fully realistic 90 degree FODO lattice Cell length β y (max/min) 10.0 m 17 / 2.9 m 20.0 m 34 / 5.9 m 40.0 m 68 / 11.8 m 80.0 m 136 / 23.5 m CLIC NLC TESLA Injection energy: 10 GeV Acceleration length: 96 % of cell length Assume: 250 GeV Linac length: 1890 m (135.0 MV/m) ~189 cells a 10 m 4290 m ( 59.0 MV/m) ~215 cells a 20 m m ( 23.4 MV/m) ~135 cells a 80 m

16 Trajectory in the CLIC, TESLA, JLC/NLC control rooms Assume: 100 mm QD offset at start of linac, low current (no WF s) CLIC type JLC/NLC type TESLA type (all 250 GeV)

17 Example case CLIC type no acceleration no wakefields QD misaligned by 50 mm Filamentation Emittance saturates due to filamentation for large energy spread (chromatic phase mixing)

18 Correlated, fractional energy spread (CLIC/NLC: BNS) Linac Linac exit RF curvature contribution TESLA: < 0.06 % 0.06% % NLC: < 0.80 % 0.25 % % CLIC: < 0.55 % 0.35 % % QD offset by 0.3 mm -> Y oscillation with amplitude ~ 1mm Example: σ E /E ε disp ε inj CLIC type 0.4% mm-mrad mm-mrad NLC type 0.6% mm-mrad mm-mrad TESLA type 0.05% mm-mrad mm-mrad Dispersion no problem, if trajectory controlled on 1 mm level! (pessimistic assumptions: No wakefields would mean no BNS)

19 1. Introduction The LC design studies Simulation codes Beam dynamics beam energy 2. Single particle dynamics Optics design Example lattices Dispersion and energy spread 3. Multi-particle dynamics Transverse wakefield BNS damping SLC as the reference Emittance/wakefield optimization Predicted LC performance Required component performance 4. Transverse beam stability Predictions for LC designs LEP experience Stability studies (vibration damping) 5. Multi-bunch effects Knowledge of long-range wakefield Multi-bunch emittance growth Effects production errors/damage 6. Conclusion

20 Interaction: Accelerated charge RF structures (small irises) (except TESLA) θ wf = W σ t en L 2E e struc ( z ) y1 0 Wakefield effect depends on: Intra-bunch and inter-bunch wakefields Offsets in rf structures (imperfections) Longitudinal distribution Charge Energy Optics RF phases Calculate effect with programs: Multi-particle beam dynamics Multiple interacting imperfections Chromatic, dispersive + wakefield errors Single-bunch and multi-bunch R. Assmann et al

21 Choice of technology determines radius of structure iris a: High frequency small a Low frequency large a Stronger wakefields (beam induced electro-magnetic fields) with smaller iris radius! Beam is closer to metallic walls

22

23 Bunch length: Transverse wakefield (at 1 σ z ): TESLA SLC NLC CLIC 300 mm 1100 mm 110 mm 30 mm TESLA 22 V/pC/m 2 SLC 1990 V/pC/m 2 NLC V/pC/m 2 CLIC V/pC/m 2 Injection energy: TESLA 5.0 GeV SLC 1.2 GeV NLC 8.0 GeV CLIC 9.0 GeV + Bunch intensity: TESLA SLC NLC CLIC BEAM

24 Represent bunch by two slices: separated by σ z each half charge θ wf = W σ t en L ( ) e struc z y1 2E 0 For 100 µm structure offset and 1 m structure length: TESLA: 0.7 nrad NLC: 86.1 nrad CLIC: nrad SLC: nrad Not done: Normalize to emittance Input structure length Wakefield kick for CLIC at 1.5 TeV almost down to TESLA at 5 GeV (1/3 larger)

25 Introduce correlated energy spread (RF phase) so that head and tail move together (same phase advance). No beam-breakup. NLC CLIC M. Woodley et al, PAC01 CLIC yellow report No BNS damping required for TESLA RF phase CLIC: ~ 6 degree

26 Single bunch emittance growth (SLC 1996/1997): R. Assmann, PAC97 γε 28 = κ γε initial + γε wf Problems due to poor emittance stability (drift towards larger emittances) multiplicative additive Simulation: κ = 1.06 γε wf = 2 Reasonable agreement with data from the SLC!

27 Learnt how to go from Left case (start of tuning) to Right case (end of tuning) Methods: - 1-to-1 steering (steer flat) - RF phasing (energy profile) - Dispersion-free steering - Emittance bump tuning

28

29 Low repetition rates (5-120 Hz) Small beam sizes (shown was smaller area than LEP) No equilibrium state, no damping after damping rings Every pulse is different The beam is living Asymmetric beam distributions, tails due to wakefields Intense tuning needed to control beam sizes and stability (much better for super-conducting linacs) Wakefield effects can be corrected very efficiently (took a while for SLC to learn how)

30 Vertical emittance growth in the linac (normalized): ε y SLC 2 mm-mrad TESLA 0.01 mm-mrad JLC/NLC mm-mrad CLIC mm-mrad Measured Lower wakefields (SC rf) Parameter optimization (charge, bunch length, ) Minimize wakefields and dispersion! Stringent requirements (JLC/NLC, CLIC) on: - alignment (beam-based) - steering (magnet, rf structure movements) - feedbacks - beam instrumentation Innovative methods have been developed

31 TESLA NLC CLIC 1-to-1 1-to-1 1-to-1 Shunt method Shunt method Ballistic correction Dispersion-free steering Moving procedure (local) Multi-step lining-up Dispersion-free steering Emittance bumps Emittance bumps Shunt method ( k-modulation ) (FFTB, HERA, LEP, ) Dispersion-free steering (SLC, LEP, ) Ballistic alignment Multi-step lining-up Emittance bumps (SLC) Vary quad K, measure change in trajectory, fit BPM to quad misalignment Minimize orbit, dispersion information together Minimum orbit/dispersion -> Straight trajectory Hidden bump in orbit shows up as dispersion oscillation. Switch off quadrupoles. Beam defines straight axis. Measure BPM offsets to axis. Similar to dispersion-free steering. (Modify quad strengths) Introduce wakefield kicks that compensate wakefield kicks from imperfections.

32 ORBIT DISPERSION CORR. KICKS DFS: Simultaneously optimize orbit, disp., corr. Suggested for NLC (Raubenheimer et al). Developed for SLC (Assmann et al)! It even works for storage rings (it should work for future LC!)

33 CLIC (D Amico,Guignard, Schulte) TESLA (CDR) Ballistic correction Multi-step + bumps Dispersion-free steering

34 Requirements and predicted LC performance TESLA JLC/NLC CLIC Quadrupole offset *# 300 mm 50.0 mm 50.0 mm Quadrupole roll mrad ~100 mrad BPM resolution 10 mm 0.3 mm 0.1 mm BPM-quad offset 100 mm 2.0 mm n/a BPM offset (axis) n/a n/a 10.0 mm Structure offset # 500 mm 30.0 mm 10.0 mm RF BPM offset/resol n/a 5.0 mm 5.0 mm Mover resolution n/a 50.0 nm 0.5 mm Emittance growth (a) One-to-one 1000 % ~ 1000 % 2700 % (b) All methods 3 % 40 % 15 % * Initial offset, before beam-based alignment # Achievable performance depends on instrumentation, environment, accessibility, (e.g. worse inside of cryostats)

35 BPM to QUAD offset (NLC) Mover setp size (NLC) Tenenbaum/Raubenheimer, LINAC2000 P. Tenenbaum, PAC99 If specifications are not met, then performance deterioration!

36 Tolerances for the RF system: Energy Energy spread 50 cases simulated Phase jitter Emittance growth Emittance growth Tolerances JLC/NLC: T. Higo, K. Kubo and K. Yokoya, PAC99 Energy: 0.1 % RF amplitude: 2% RF phase: 3 degree

37 1. Introduction The LC design studies Simulation codes Beam dynamics beam energy 2. Single particle dynamics Optics design Example lattices Dispersion and energy spread 3. Multi-particle dynamics Transverse wakefield BNS damping SLC as the reference Emittance/wakefield optimization Predicted LC performance Required component performance 4. Transverse beam stability Predictions for LC designs LEP experience Stability studies (vibration damping) 5. Multi-bunch effects Knowledge of long-range wakefield Multi-bunch emittance growth Effects production errors/damage 6. Conclusion

38 1) Beam position stability: Quadrupole vibration/drift drives coherent betatron oscillations. Feedback inefficient below ~ 0.04 * f rep Tolerance set by σ exit = (βε exit ) 1/2 2) Emittance stability: Betatron oscillation drives transverse emittance growth. TESLA JLC/NLC CLIC Quadrupole jitter nm 10 nm 1.3 nm Offset jitter [σ y ] A [10-7 µm 2 /s/m] Orbit drift 1 σ y in 30s - - Emittance growth - 29% in 30 min 11% in 1min Correction w/o fdbk 15 min Correction w fdbk 10 h 3 days Note: 1) Take drifts as rough estimates! Different hardware, feedback constellation, tuning methods! No consistent operational procedure simulated 2) Different A reflects different geological conditions (sandy rock; site-specific)

39 Luminosity decay due to vertical orbit drifts: L cm s per minute ε nm per minute Orbit correction ε ε 1.5% / min De/e ~ 1.5 % / min for best performance Luminosity stabilized with the vertical orbit feedback ( autopilot ) every 7-8 minutes (3% effect). Orbit stabilization: ~ 20 mm level. Both visible from experiments and beam lifetime BCT (faster)! No reason to be afraid of fast orbit stabilization

40 CLIC tolerance on vertical quadrupole vibration: 1.3 nm (vibration above 4 Hz) Measurements in the LEP tunnel Man passing by magnet 20 nm 2 µm 0.1 nm V. Shiltsev 1994 A. Seryi et al, CERN 1993 Ground stability in LEP tunnel much below required 1.3 nm (quiet) However, easily surpassed from human induced noise (running equipment)

41 CLIC Magnet Stability Study M. Aleksa, R. Assmann, W. Coosemans, G. Guignard, N. Leros, M. Mayoud, S. Redaelli, F. Ruggiero, S. Russenschuck, D. Schulte, A. Verdier, I. Wilson, F. Zimmermann - CERN: SL, PS, EST, LHC divisions involved - CERN test stand on main site (surface, close to road, accelerators, equipment). - Collaboration with SLAC/NLC. Contacts with DESY and FNAL. Since January 2001 fully approved Goal: The goal of the proposed study is to show that the present design parameters of CLIC are feasible in a real accelerator environment, using and further developing latest cutting-edge stabilization technology and time-dependent simulation programs. Active and passive stabilization technology subject of intense industrial research and development. Applications: Chip lithography, electron-transmission microscopy, NMR devices, solid-sate physics, satellites, airplanes, gravitational wave detectors, lasers, E.g. If TEM can achieve 0.05 nm resolution why can t we use this? SLAC:Strong effort for final doublet stabilization (Seryi, Frisch, ) Number of recent papers by A. Seryi (see also T working group)

42 26th Advanced ICFA Beam Dynamics Workshop on Nanometre-Size Colliding Particle Beams CERN, September 2002 Amongst other topics, address many stability issues! Where is the limit? Hope for input from colleagues in our field and from other fields. Can we give a limit? Please contact R. Assmann or F. Zimmermann if you have ideas, input, special requests!

43 1. Introduction The LC design studies Simulation codes Beam dynamics beam energy 2. Single particle dynamics Optics design Example lattices Dispersion and energy spread 3. Multi-particle dynamics Transverse wakefield BNS damping SLC as the reference Emittance/wakefield optimization Predicted LC performance Required component performance 4. Transverse beam stability Predictions for LC designs LEP experience Stability studies (vibration damping) 5. Multi-bunch effects Knowledge of long-range wakefield Multi-bunch emittance growth Effects production errors/damage 6. Conclusion

44 Input: Calculations + ASSET tests. Optimize design... CLIC structure: (scaled to 15 GHz) Measured (black) and calculated (red) transverse wakefield versus time [ns] Wakefield (V/pC/mm) I. Wilson et al EPAC2000 Time [ns] Very good agreement, except unexpected 7.6 GHz component HFSS: vacuum chamber to beam pipe transition, not the structure itself Time [ns]

45 TAU3P calculation for 10 cells compared with measurements: (RDDS accelerator structure, NLC) Dipole Mode Spectrum Dipole Mode Frequency (GHz) Amplitude Measurement Tau3P (350) (400) Frequency [Hz] Very good accuracy! Cho Ng, Brian Mc Candless, ICAP2000

46 HOM damping requirements for the TESLA superstructures Worst result (10 cases) Cavity misalignment 500 mm 21.7 MV/m gradient 27 modes: Q = 2e5 4 modes: Q = 1e5 N. Baboi et al EPAC2000 Measured HOM OK for TESLA Multi-bunch offsets at the end of the TESLA linac Calculated multi-bunch emittance growth along the TESLA linac e y = 20 E-09 m rad

47 Envelope of wakefield: (a) ideal R. Jones et al, EPAC2000 Wake Function [V/pC/mm/m] s [m] s [m] (b) 2 MHz rms error (c) 5 MHz rms error Emittance growth: BPM position [km] 4% 600% s [m] BPM position [km]

48 1. Introduction The LC design studies Simulation codes Beam dynamics beam energy 2. Single particle dynamics Optics design Example lattices Dispersion and energy spread 3. Multi-particle dynamics Transverse wakefield BNS damping SLC as the reference Emittance/wakefield optimization Predicted LC performance Required component performance 4. Transverse beam stability Predictions for LC designs LEP experience Stability studies (vibration damping) 5. Multi-bunch effects Knowledge of long-range wakefield Multi-bunch emittance growth Effects production errors/damage 6. Conclusion

49 Linac beam dynamics is a very rich field. It depends strongly on choice of RF technology and beam energy. Predictions are based on detailed simulations. Simulation codes are connected closely to SLC experience. Good reproduction of SLC data. Solutions are published for LC proposals up to 3 TeV. Relevant beam dynamics is understood. No reasonable doubts on simulation results. But: What is reasonable input? Work ongoing to establish most realistic input data (test accelerators, magnet stability study, ) (fully base design on measured performance of components)

Lattice Design and Performance for PEP-X Light Source

Lattice Design and Performance for PEP-X Light Source Lattice Design and Performance for PEP-X Light Source Yuri Nosochkov SLAC National Accelerator Laboratory With contributions by M-H. Wang, Y. Cai, X. Huang, K. Bane 48th ICFA Advanced Beam Dynamics Workshop

More information

Accelerator R&D Opportunities: Sources and Linac. Developing expertise. D. Rubin, Cornell University

Accelerator R&D Opportunities: Sources and Linac. Developing expertise. D. Rubin, Cornell University Accelerator R&D Opportunities: Sources and Linac D. Rubin, Cornell University Electron and positron sources Requirements Status of R&D Linac Modeling of beam dynamics Development of diagnostic and tuning

More information

Linear Collider Collaboration Tech Notes

Linear Collider Collaboration Tech Notes LCC-0073 SLAC-PUB-9004 September 2001 Linear Collider Collaboration Tech Notes Microwave Quadrupoles for Beam Break-up Supression In the NLC Main Linac K.L.F. Bane and G. Stupakov Stanford Linear Accelerator

More information

Abstract. results that address this question for the main linacs of the NLC. We will show that the effects of alignment drifts can indeed be handled.

Abstract. results that address this question for the main linacs of the NLC. We will show that the effects of alignment drifts can indeed be handled. SLAC-PUB-732 September 1996 Emittance Dilution Due to Slow Alignment Drifts in the Main Linacs of the NLC* R. Assmann, C. Adolphsen, K. Bane, T.O. Raubenheimer, K. Thompson Stanford Linear Accelerator

More information

Beam-beam Effects in Linear Colliders

Beam-beam Effects in Linear Colliders Beam-beam Effects in Linear Colliders Daniel Schulte D. Schulte Beam-beam effects in Linear Colliders 1 Generic Linear Collider Single pass poses luminosity challenge Low emittances are produced in the

More information

COMPUTATIONAL NEEDS FOR THE ILC

COMPUTATIONAL NEEDS FOR THE ILC Proceedings of ICAP 2006, Chamonix, France MOMPMP02 COMPUTATIONAL NEEDS FOR THE ILC D. Schulte, CERN, K. Kubo, KEK Abstract The ILC requires detailed studies of the beam transport and of individual components

More information

NLC Luminosity and Accelerator Physics

NLC Luminosity and Accelerator Physics Stanford Linear Accelerator Center X-Band Linear Collider Path to the Future NLC Luminosity and Accelerator Physics International Technology Recommendation Panel April 26-27, 2004 Outline Talk will focus

More information

Transverse dynamics Selected topics. Erik Adli, University of Oslo, August 2016, v2.21

Transverse dynamics Selected topics. Erik Adli, University of Oslo, August 2016, v2.21 Transverse dynamics Selected topics Erik Adli, University of Oslo, August 2016, Erik.Adli@fys.uio.no, v2.21 Dispersion So far, we have studied particles with reference momentum p = p 0. A dipole field

More information

Physics 610. Adv Particle Physics. April 7, 2014

Physics 610. Adv Particle Physics. April 7, 2014 Physics 610 Adv Particle Physics April 7, 2014 Accelerators History Two Principles Electrostatic Cockcroft-Walton Van de Graaff and tandem Van de Graaff Transformers Cyclotron Betatron Linear Induction

More information

CLIC Detector studies status + plans

CLIC Detector studies status + plans CLIC Detector studies status + plans Contents: - Introduction to CLIC accelerator - 2004 CLIC Study group report: "Physics at the CLIC Multi-TeV Linear Collider - CERN participation in Linear Collider

More information

Overview of Acceleration

Overview of Acceleration Overview of Acceleration R B Palmer, Scott Berg, Steve Kahn (presented by Steve Kahn) Nufact-04 RF Frequency Acc types and System Studies Linacs RLA s FFAG s Injection/Extraction US Study 2a acceleration

More information

SLS at the Paul Scherrer Institute (PSI), Villigen, Switzerland

SLS at the Paul Scherrer Institute (PSI), Villigen, Switzerland SLS at the Paul Scherrer Institute (PSI), Villigen, Switzerland Michael Böge 1 SLS Team at PSI Michael Böge 2 Layout of the SLS Linac, Transferlines Booster Storage Ring (SR) Beamlines and Insertion Devices

More information

Proton-driven plasma wakefield acceleration

Proton-driven plasma wakefield acceleration Proton-driven plasma wakefield acceleration Matthew Wing (UCL) Motivation : particle physics; large accelerators General concept : proton-driven plasma wakefield acceleration Towards a first test experiment

More information

Overview on Compton Polarimetry

Overview on Compton Polarimetry General Issues O spin motion & alignment tolerances O beam-beam effects & upstream vs. Downstream Compton Polarimetry Basics O beam parameters & Compton detection methods O kinematics, cross sections &

More information

COMBINER RING LATTICE

COMBINER RING LATTICE CTFF3 TECHNICAL NOTE INFN - LNF, Accelerator Division Frascati, April 4, 21 Note: CTFF3-2 COMBINER RING LATTICE C. Biscari 1. Introduction The 3 rd CLIC test facility, CTF3, is foreseen to check the feasibility

More information

Aperture Measurements and Implications

Aperture Measurements and Implications Aperture Measurements and Implications H. Burkhardt, SL Division, CERN, Geneva, Switzerland Abstract Within short time, the 2/90 optics allowed to reach similar luminosity performance as the 90/60 optics,

More information

Fermilab HG cavity and coupler R&D

Fermilab HG cavity and coupler R&D Fermilab HG cavity and coupler R&D Motivation HOM calculations Nikolay Solyak Fermilab Outline Main Coupler and HOM dumping Multipactor Lorentz Forces Single bunch beam dynamics Summary Nikolay Solyak

More information

Diagnostics Needs for Energy Recovery Linacs

Diagnostics Needs for Energy Recovery Linacs Diagnostics Needs for Energy Recovery Linacs Georg H. Hoffstaetter Cornell Laboratory for Accelerator-based Sciences and Education & Physics Department Cornell University, Ithaca New York 14853-2501 gh77@cornell.edu

More information

3. Synchrotrons. Synchrotron Basics

3. Synchrotrons. Synchrotron Basics 1 3. Synchrotrons Synchrotron Basics What you will learn about 2 Overview of a Synchrotron Source Losing & Replenishing Electrons Storage Ring and Magnetic Lattice Synchrotron Radiation Flux, Brilliance

More information

TeV Scale Muon RLA Complex Large Emittance MC Scenario

TeV Scale Muon RLA Complex Large Emittance MC Scenario TeV Scale Muon RLA Complex Large Emittance MC Scenario Alex Bogacz and Kevin Beard Muon Collider Design Workshop, BNL, December 1-3, 29 Outline Large Emittance MC Neuffer s Collider Acceleration Scheme

More information

The Electron-Ion Collider

The Electron-Ion Collider The Electron-Ion Collider C. Tschalaer 1. Introduction In the past year, the idea of a polarized electron-proton (e-p) or electron-ion (e-a) collider of high luminosity (10 33 cm -2 s -1 or more) and c.m.

More information

LHC upgrade based on a high intensity high energy injector chain

LHC upgrade based on a high intensity high energy injector chain LHC upgrade based on a high intensity high energy injector chain Walter Scandale CERN AT department PAF n. 6 CERN, 15 September 2005 luminosity and energy upgrade Phase 2: steps to reach maximum performance

More information

THE COMPACT LINEAR COLLIDER (CLIC) STUDY

THE COMPACT LINEAR COLLIDER (CLIC) STUDY THE COMPACT LINEAR COLLIDER (CLIC) STUDY J.P.Delahaye for The Compact LInear Collider Study Team The CLIC study is a site independent feasibility study aiming at the development of a realistic technology

More information

LHC Luminosity and Energy Upgrade

LHC Luminosity and Energy Upgrade LHC Luminosity and Energy Upgrade Walter Scandale CERN Accelerator Technology department EPAC 06 27 June 2006 We acknowledge the support of the European Community-Research Infrastructure Activity under

More information

Measurement of wakefields in hollow plasma channels Carl A. Lindstrøm (University of Oslo)

Measurement of wakefields in hollow plasma channels Carl A. Lindstrøm (University of Oslo) Measurement of wakefields in hollow plasma channels Carl A. Lindstrøm (University of Oslo) in collaboration with Spencer Gessner (CERN) presented by Erik Adli (University of Oslo) FACET-II Science Workshop

More information

Femto second X ray Pulse Generation by Electron Beam Slicing. F. Willeke, L.H. Yu, NSLSII, BNL, Upton, NY 11973, USA

Femto second X ray Pulse Generation by Electron Beam Slicing. F. Willeke, L.H. Yu, NSLSII, BNL, Upton, NY 11973, USA Femto second X ray Pulse Generation by Electron Beam Slicing F. Willeke, L.H. Yu, NSLSII, BNL, Upton, NY 11973, USA r 2 r 1 y d x z v Basic Idea: When short electron bunch from linac (5MeV, 50pC,100fs)

More information

RF System Calibration Using Beam Orbits at LEP

RF System Calibration Using Beam Orbits at LEP EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN SL DIVISION CERN-SL-22-28 OP LEP Energy Working Group 2/1 RF System Calibration Using Beam Orbits at LEP J. Wenninger Abstract The target for beam energy

More information

Measurement and Compensation of Betatron Resonances at the CERN PS Booster Synchrotron

Measurement and Compensation of Betatron Resonances at the CERN PS Booster Synchrotron Measurement and Compensation of Betatron Resonances at the CERN PS Booster Synchrotron Urschütz Peter (AB/ABP) CLIC meeting, 29.10.2004 1 Overview General Information on the PS Booster Synchrotron Motivation

More information

Outlook for PWA Experiments

Outlook for PWA Experiments Outlook for PWA Experiments Ralph Assmann, Steffen Hillenbrand, Frank Zimmermann CERN, BE Department, ABP Group KET Meeting Dortmund 25 October 2010 themes community interest and potential first demonstration

More information

2 Closed Orbit Distortions A dipole kick j at position j produces a closed orbit displacement u i at position i given by q i j u i = 2 sin Q cos(j i ;

2 Closed Orbit Distortions A dipole kick j at position j produces a closed orbit displacement u i at position i given by q i j u i = 2 sin Q cos(j i ; LHC Project Note 4 March 2, 998 Jorg.Wenninger@cern.ch Quadrupole Alignment and Closed Orbits at LEP : a Test Ground for LHC J. Wenninger Keywords: CLOSED-ORBIT ALIGNMENT CORRECTORS Summary A statistical

More information

Linac optimisation for the New Light Source

Linac optimisation for the New Light Source Linac optimisation for the New Light Source NLS source requirements Electron beam requirements for seeded cascade harmonic generation LINAC optimisation (2BC vs 3 BC) CSR issues energy chirp issues jitter

More information

TLEP White Paper : Executive Summary

TLEP White Paper : Executive Summary TLEP White Paper : Executive Summary q TLEP : A first step in a long- term vision for particle physics In the context of a global project CERN implementation A. Blondel J. Osborne and C. Waajer See Design

More information

1.1 Report on the First ILC Workshop, KEK (Japan) November 04

1.1 Report on the First ILC Workshop, KEK (Japan) November 04 5 1.1 Report on the First ILC Workshop, KEK (Japan) November 04 1.1.1 Introduction Susanna Guiducci mail to: Susanna.Guiducci@lnf.infn.it LNF-INFN, Frascati, Italy The First International Linear Collider

More information

ILC concepts / schematic

ILC concepts / schematic INFN School on Electron Accelerators 12-14 September 2007, INFN Sezione di Pisa Lecture 1a ILC concepts / schematic Carlo Pagani University of Milano INFN Milano-LASA & GDE The Standard Model Fundamental

More information

THE ACTIVE PREALIGNMENT OF THE CLIC COMPONENTS H. MAINAUD DURAND, T. TOUZE CERN

THE ACTIVE PREALIGNMENT OF THE CLIC COMPONENTS H. MAINAUD DURAND, T. TOUZE CERN THE ACTIVE PREALIGNMENT OF THE CLIC COMPONENTS H. MAINAUD DURAND, T. TOUZE CERN Overview Introduction : the CLIC study The alignment of CLIC Steps of alignment The active prealignment The situation of

More information

ILC Crab Cavity Wakefield Analysis

ILC Crab Cavity Wakefield Analysis ILC Crab Cavity Wakefield Analysis Yesterday, Peter McIntosh discussed the overall requirements for the ILC crab cavities, the system-level design, and the team that is working on it. Here, I will discuss

More information

PROGRESS ON NEXT GENERATION LINEAR COLLIDERS* 1. INTRODUCTION

PROGRESS ON NEXT GENERATION LINEAR COLLIDERS* 1. INTRODUCTION SLAC-PUB-4848 January 1989 (A/E) PROGRESS ON NEXT GENERATION LINEAR COLLIDERS* RONALD D. RUTH Stanford Linear Accelerator Center Stanford University, Stanford, California 94309 1. INTRODUCTION The purpose

More information

FIRST OPERATION OF THE SWISS LIGHT SOURCE

FIRST OPERATION OF THE SWISS LIGHT SOURCE FIRST OPERATION OF THE SWISS LIGHT SOURCE M. Böge, PSI, Villigen, Switzerland Abstract The Swiss Light Source (SLS) at the Paul Scherrer Institute (PSI) is the most recent 3rd generation light source to

More information

Magnet Alignment Sensitivities in ILC DR Configuration Study Lattices. Andy Wolski. US ILC DR Teleconference July 27, 2005

Magnet Alignment Sensitivities in ILC DR Configuration Study Lattices. Andy Wolski. US ILC DR Teleconference July 27, 2005 Magnet Alignment Sensitivities in ILC DR Configuration Stud Lattices And Wolski Lawrence Berkele National Laborator US ILC DR Teleconference Jul 7, 005 : Equilibrium vertical emittance in ILC DR must be

More information

Introduction to Accelerators. Scientific Tools for High Energy Physics and Synchrotron Radiation Research

Introduction to Accelerators. Scientific Tools for High Energy Physics and Synchrotron Radiation Research Introduction to Accelerators. Scientific Tools for High Energy Physics and Synchrotron Radiation Research Pedro Castro Introduction to Particle Accelerators DESY, July 2010 What you will see Pedro Castro

More information

Run2 Problem List (Bold-faced items are those the BP Department can work on) October 4, 2002

Run2 Problem List (Bold-faced items are those the BP Department can work on) October 4, 2002 Run2 Problem List (Bold-faced items are those the BP Department can work on) October 4, 2002 Linac Booster o 4.5-4.8e12 ppp at 0.5 Hz o Space charge (30% loss in the first 5 ms) o Main magnet field quality

More information

Status of Fast Ion Instability Studies

Status of Fast Ion Instability Studies Zur Anzeige wird der QuickTime Dekompressor TIFF (Unkomprimiert) benötigt. Status of Fast Ion Instability Studies Guoxing Xia presented by E. Elsen European LC Workshop, Jan 8-9, 2007, Daresbury 0 Ion

More information

Interaction Regions with Increased Low-Betas. for a 2-TeV Muon Collider. Carol Johnstone, King-Yuen Ng

Interaction Regions with Increased Low-Betas. for a 2-TeV Muon Collider. Carol Johnstone, King-Yuen Ng Interaction Regions with Increased Low-Betas for a 2-TeV Muon Collider Carol Johnstone, King-Yuen Ng Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 Dejan Trbojevic Brookhaven National

More information

Experience on Coupling Correction in the ESRF electron storage ring

Experience on Coupling Correction in the ESRF electron storage ring Experience on Coupling Correction in the ESRF electron storage ring Laurent Farvacque & Andrea Franchi, on behalf of the Accelerator and Source Division Future Light Source workshop 2012 Jefferson Lab,

More information

Potential use of erhic s ERL for FELs and light sources ERL: Main-stream GeV e - Up-gradable to 20 + GeV e -

Potential use of erhic s ERL for FELs and light sources ERL: Main-stream GeV e - Up-gradable to 20 + GeV e - Potential use of erhic s ERL for FELs and light sources Place for doubling energy linac ERL: Main-stream - 5-10 GeV e - Up-gradable to 20 + GeV e - RHIC Electron cooling Vladimir N. Litvinenko and Ilan

More information

LHC APERTURE AND COMMISSIONING OF THE COLLIMATION SYSTEM

LHC APERTURE AND COMMISSIONING OF THE COLLIMATION SYSTEM LHC APERTURE AND COMMISSIONING OF THE COLLIMATION SYSTEM S. Redaelli, R. Aßmann, G. Robert-Demolaize, CERN, Geneva, Switzerland Abstract The design LHC aperture and its dependence on various optics imperfections

More information

THE CLIC PROJECT - STATUS AND PROSPECTS

THE CLIC PROJECT - STATUS AND PROSPECTS THE CLIC PROJECT - STATUS AND PROSPECTS E. Adli, University of Oslo, Norway On behalf of the CLIC/CTF3 collaboration Abstract Following the feasibility demonstration of the novel CLIC technology and the

More information

Theory English (Official)

Theory English (Official) Q3-1 Large Hadron Collider (10 points) Please read the general instructions in the separate envelope before you start this problem. In this task, the physics of the particle accelerator LHC (Large Hadron

More information

I 0.5 I 1.0 I 1.5 Luminosity [ 1 0 ~ ]

I 0.5 I 1.0 I 1.5 Luminosity [ 1 0 ~ ] T. Raubenheimer, C. Adolphsen, D. Burke, P. Chen, S. Ecklund, J. Irwin,G. Loew, T. Markiewicz, R. Miller, E. Patexson, N. Phinney, M. Ross, R. Ruth, J. Sheppard, H. Tang,KThompson Stanford Linear Accelerator

More information

Commissioning of PETRA III. Klaus Balewski on behalf of the PETRA III Team IPAC 2010, 25 May, 2010

Commissioning of PETRA III. Klaus Balewski on behalf of the PETRA III Team IPAC 2010, 25 May, 2010 Commissioning of PETRA III Klaus Balewski on behalf of the PETRA III Team IPAC 2010, 25 May, 2010 PETRA III Parameters Circumference (m) Energy (GeV) ε x (nm rad) ε y (pm rad) Current (ma) # bunches Straight

More information

Proposal for Single- Bunch Collimator Wakefield Measurements at SLAC ESTB

Proposal for Single- Bunch Collimator Wakefield Measurements at SLAC ESTB Proposal for Single- Bunch Collimator Wakefield Measurements at SLAC ESTB A. Latina, CERN, Geneva, Switzerland M. Pivi, SLAC, Stanford, USA J. Resta-Lopez, IFIC, Valencia, Spain (spokesperson) Abstract

More information

Minimum emittance superbend lattices?

Minimum emittance superbend lattices? SLS-TME-TA-2006-0297 3rd January 2007 Minimum emittance superbend lattices? Andreas Streun Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland Andreas Streun, PSI, Dec.2004 Minimum emittance superbend

More information

The FAIR Accelerator Facility

The FAIR Accelerator Facility The FAIR Accelerator Facility SIS300 existing GSI proton linac SIS18 UNILAC SIS100 HESR pbar target SuperFRS goals: higher intensity (low charge states) higher energy (high charge states) production of

More information

Emittance Dilution In Electron/Positron Damping Rings

Emittance Dilution In Electron/Positron Damping Rings Emittance Dilution In Electron/Positron Damping Rings David Rubin (for Jeremy Perrin, Mike Ehrlichman, Sumner Hearth, Stephen Poprocki, Jim Crittenden, and Suntao Wang) Outline CESR Test Accelerator Single

More information

Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator

Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator R. Joel England J. B. Rosenzweig, G. Travish, A. Doyuran, O. Williams, B. O Shea UCLA Department

More information

Modern Accelerators for High Energy Physics

Modern 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 information

An ERL-Based High-Power Free- Electron Laser for EUV Lithography

An ERL-Based High-Power Free- Electron Laser for EUV Lithography An ERL-Based High-Power Free- Electron Laser for EUV Lithography Norio Nakamura High Energy Accelerator Research Organization(KEK) 2015 EUVL Workshop, Maui, Hawaii, USA, June 15-19, 2015. ERL-EUV Design

More information

Linear Imperfections Oliver Bruning / CERN AP ABP

Linear Imperfections Oliver Bruning / CERN AP ABP Linear Imperfection CAS Fracati November 8 Oliver Bruning / CERN AP ABP Linear Imperfection equation of motion in an accelerator Hill equation ine and coine like olution cloed orbit ource for cloed orbit

More information

The LHC. Part 1. Corsi di Dottorato Corso di Fisica delle Alte Energie Maggio 2014 Per Grafstrom CERN and University of Bologna

The LHC. Part 1. Corsi di Dottorato Corso di Fisica delle Alte Energie Maggio 2014 Per Grafstrom CERN and University of Bologna The LHC Part 1 Corsi di Dottorato Corso di Fisica delle Alte Energie Maggio 2014 Per Grafstrom CERN and University of Bologna Organizzazione Part 1 Part 2 Part 3 Introduction Energy challenge Luminosity

More information

Ion Polarization in RHIC/eRHIC

Ion Polarization in RHIC/eRHIC Ion Polarization in RHIC/eRHIC M. Bai, W. MacKay, V. Ptitsyn, T. Roser, A. Zelenski Polarized Ion Sources (reporting for Anatoly Zelenski) Polarized proton beams in RHIC/eRHIC Polarized He3 for erhic (reporting

More information

Ultra-Low Emittance Storage Ring. David L. Rubin December 22, 2011

Ultra-Low Emittance Storage Ring. David L. Rubin December 22, 2011 Ultra-Low Emittance Storage Ring David L. Rubin December 22, 2011 December 22, 2011 D. L. Rubin 2 Much of our research is focused on the production and physics of ultra-low emittance beams. Emittance is

More information

Notes on the HIE-ISOLDE HEBT

Notes on the HIE-ISOLDE HEBT EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH HIE-ISOLDE-PROJECT-Note-13 Notes on the HIE-ISOLDE HEBT M.A. Fraser Abstract The HEBT will need to transfer the beam from the HIE-ISOLDE linac to up to four experimental

More information

Overview of LHC Accelerator

Overview of LHC Accelerator Overview of LHC Accelerator Mike Syphers UT-Austin 1/31/2007 Large Hadron Collider ( LHC ) Outline of Presentation Brief history... Luminosity Magnets Accelerator Layout Major Accelerator Issues U.S. Participation

More information

DEVELOPMENT AND BENCHMARKING OF CODES FOR SIMULATION OF BEAM-BEAM EFFECTS AT THE LHC

DEVELOPMENT AND BENCHMARKING OF CODES FOR SIMULATION OF BEAM-BEAM EFFECTS AT THE LHC DEVELOPMENT AND BENCHMARKING OF CODES FOR SIMULATION OF BEAM-BEAM EFFECTS AT THE LHC F. Schmidt, CERN, Geneva, Switzerland A. Valishev, FNAL, Batavia, IL 60510, USA Y. Luo, BNL, Upton, NY 11973-5000, USA

More information

Polarised e ± at HERA

Polarised e ± at HERA olarised e ± at HERA D.. Barber, E. Gianfelice Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D 223 Hamburg, Germany After a short summary of experience with e ± polarisation at the preupgraded

More information

BERLinPro. An ERL Demonstration facility at the HELMHOLTZ ZENTRUM BERLIN

BERLinPro. An ERL Demonstration facility at the HELMHOLTZ ZENTRUM BERLIN BERLinPro An ERL Demonstration facility at the HELMHOLTZ ZENTRUM BERLIN BERLinPro: ERL demonstration facility to prepare the ground for a few GeV ERL @ Berlin-Adlershof Goal: 100MeV, 100mA beam Small emittance,

More information

Simulations of single bunch collective effects using HEADTAIL

Simulations of single bunch collective effects using HEADTAIL Simulations of single bunch collective effects using HEADTAIL G. Rumolo, in collaboration with E. Benedetto, O. Boine-Frankenheim, G. Franchetti, E. Métral, F. Zimmermann ICAP, Chamonix, 02.10.2006 Giovanni

More information

Recent Progress at the CLIC Test Facility 3 at CERN

Recent Progress at the CLIC Test Facility 3 at CERN Recent Progress at the CLIC Test acility 3 at CERN P. Urschütz Talk outline Introduction to the CLIC two-beam scheme The CLIC Test acility CT3 Results from CT3 Past Recent Results Outlook on future activities

More information

STATUS OF BEPC AND PLAN OF BEPCII

STATUS OF BEPC AND PLAN OF BEPCII STATUS OF BEPC AND PLAN OF BEPCII C. Zhang for BEPCII Team Institute of High Energy Physics, P.O.Box 918, Beijing 139, China Abstract The status of the Beijing Electron-Positron Collider (BEPC) and plans

More information

Beam losses versus BLM locations at the LHC

Beam losses versus BLM locations at the LHC Geneva, 12 April 25 LHC Machine Protection Review Beam losses versus BLM locations at the LHC R. Assmann, S. Redaelli, G. Robert-Demolaize AB - ABP Acknowledgements: B. Dehning Motivation - Are the proposed

More information

Linear Collider Collaboration Tech Notes

Linear Collider Collaboration Tech Notes LCC-0124 SLAC-PUB-9814 September 2003 Linear Collider Collaboration Tech Notes Recent Electron Cloud Simulation Results for the NLC and for the TESLA Linear Colliders M. T. F. Pivi, T. O. Raubenheimer

More information

(a) (b) Fig. 1 - The LEP/LHC tunnel map and (b) the CERN accelerator system.

(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 information

The Booster has three magnet systems for extraction: Kicker Ke, comprising two identical magnets and power supplies Septum Se

The Booster has three magnet systems for extraction: Kicker Ke, comprising two identical magnets and power supplies Septum Se 3.2.7 Booster Injection and Extraction 3.2.7.1 Overview The Booster has two magnet systems for injection: Septum Si Kicker Ki The Booster has three magnet systems for extraction: Kicker Ke, comprising

More information

Emittance preserving staging optics for PWFA and LWFA

Emittance preserving staging optics for PWFA and LWFA Emittance preserving staging optics for PWFA and LWFA Physics and Applications of High Brightness Beams Havana, Cuba Carl Lindstrøm March 29, 2016 PhD Student University of Oslo / SLAC (FACET) Supervisor:

More information

New Electron Source for Energy Recovery Linacs

New Electron Source for Energy Recovery Linacs New Electron Source for Energy Recovery Linacs Ivan Bazarov 20m Cornell s photoinjector: world s brightest electron source 1 Outline Uses of high brightness electron beams Physics of brightness High brightness

More information

COLLIMATION SYSTEMS IN THE NEXT LINEAR COLLIDER* N. MERMINGA, J. IRWIN, R. HELM, and R. D. RUTH

COLLIMATION SYSTEMS IN THE NEXT LINEAR COLLIDER* N. MERMINGA, J. IRWIN, R. HELM, and R. D. RUTH COLLIMATION SYSTEMS IN THE NEXT LINEAR COLLIDER* N. MERMINGA, J. IRWIN, R. HELM, and R. D. RUTH Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 SLAC-PUB-5436 February 1991 (A)

More information

A Polarized Electron PWT Photoinjector for the ILC

A Polarized Electron PWT Photoinjector for the ILC 2005 ALCPG & ILC Workshops Snowmass, U.S.A. A Polarized Electron PWT Photoinjector for the ILC David Yu, Yan Luo, Alexei Smirnov, DULY Research Inc., Rancho Palos Verdes, CA 90275 Ivan Bazarov, Cornell

More information

LHC commissioning. 22nd June Mike Lamont LHC commissioning - CMS 1

LHC commissioning. 22nd June Mike Lamont LHC commissioning - CMS 1 LHC commissioning Mike Lamont AB-OP nd June 005.06.05 LHC commissioning - CMS 1 Detailed planning for 7-87 8 and 8-18 005 006 Short Circuit Tests CNGS/TI8/IT1 HWC LSS.L8.06.05 LHC commissioning - CMS Sector

More information

Transverse Beam Dynamics II

Transverse Beam Dynamics II Transverse Beam Dynamics II II) The State of the Art in High Energy Machines: The Theory of Synchrotrons: Linear Beam Optics The Beam as Particle Ensemble Emittance and Beta-Function Colliding Beams &

More information

LHC Upgrade (accelerator)

LHC Upgrade (accelerator) LHC Upgrade (accelerator) Time scale of LHC luminosity upgrade Machine performance limitations Scenarios for the LHC upgrade Phase 0: no hardware modifications Phase 1: Interaction Region upgrade Phase

More information

Lecture 4: Emittance Compensation. J.B. Rosenzweig USPAS, UW-Madision 6/30/04

Lecture 4: Emittance Compensation. J.B. Rosenzweig USPAS, UW-Madision 6/30/04 Lecture 4: Emittance Compensation J.B. Rosenzweig USPAS, UW-Madision 6/30/04 Emittance minimization in the RF photoinjector Thermal emittance limit Small transverse beam size Avoid metal cathodes? n,th

More information

The LHC: the energy, cooling, and operation. Susmita Jyotishmati

The LHC: the energy, cooling, and operation. Susmita Jyotishmati The LHC: the energy, cooling, and operation Susmita Jyotishmati LHC design parameters Nominal LHC parameters Beam injection energy (TeV) 0.45 Beam energy (TeV) 7.0 Number of particles per bunch 1.15

More information

arxiv: v1 [physics.acc-ph] 5 Sep 2017

arxiv: v1 [physics.acc-ph] 5 Sep 2017 arxiv:179.1425v1 [physics.acc-ph] 5 Sep 217 Enhancement of space-charge induced damping due to reactive impedances for head-tail modes V. Kornilov, GSI Helmholtzzentrum, Planckstr. 1, Darmstadt, Germany,

More information

Emittance Compensation. J.B. Rosenzweig ERL Workshop, Jefferson Lab 3/20/05

Emittance Compensation. J.B. Rosenzweig ERL Workshop, Jefferson Lab 3/20/05 Emittance Compensation J.B. Rosenzweig ERL Workshop, Jefferson Lab 3//5 Emittance minimization in the RF photoinjector Thermal emittance limit Small transverse beam size Avoid metal cathodes? " n,th #

More information

Superconducting RF Accelerators: Why all the interest?

Superconducting RF Accelerators: Why all the interest? Superconducting RF Accelerators: Why all the interest? William A. Barletta Director, United States Particle Accelerator School Dept. of Physics, MIT The HEP prespective ILC PROJECT X Why do we need RF

More information

USPAS Accelerator Physics 2017 University of California, Davis

USPAS Accelerator Physics 2017 University of California, Davis USPAS Accelerator Physics 207 University of California, Davis Lattice Extras: Linear Errors, Doglegs, Chicanes, Achromatic Conditions, Emittance Exchange Todd Satogata (Jefferson Lab) / satogata@jlab.org

More information

4GLS Status. Susan L Smith ASTeC Daresbury Laboratory

4GLS Status. Susan L Smith ASTeC Daresbury Laboratory 4GLS Status Susan L Smith ASTeC Daresbury Laboratory Contents ERLP Introduction Status (Kit on site ) Plan 4GLS (Conceptual Design) Concept Beam transport Injectors SC RF FELs Combining Sources May 2006

More information

CLIC THE COMPACT LINEAR COLLIDER

CLIC THE COMPACT LINEAR COLLIDER CLIC THE COMPACT LINEAR COLLIDER Emmanuel Tsesmelis Directorate Office, CERN 9 th Corfu Summer Institute 4 September 2009 1 THE CLIC ACCELERATOR 2 Linear Collider Baseline LEP: 209 GeV next Electron-Positron

More information

Lectures on accelerator physics

Lectures on accelerator physics Lectures on accelerator physics Lecture 3 and 4: Examples Examples of accelerators 1 Rutherford s Scattering (1909) Particle Beam Target Detector 2 Results 3 Did Rutherford get the Nobel Prize for this?

More information

PARTICLE BEAMS, TOOLS FOR MODERN SCIENCE AND MEDICINE Hans-H. Braun, CERN

PARTICLE BEAMS, TOOLS FOR MODERN SCIENCE AND MEDICINE Hans-H. Braun, CERN 5 th Particle Physics Workshop National Centre for Physics Quaid-i-Azam University Campus, Islamabad PARTICLE BEAMS, TOOLS OR MOERN SCIENCE AN MEICINE Hans-H. Braun, CERN 3 rd Lecture Introduction to Linear

More information

Accelerator development

Accelerator development Future Colliders Stewart T. Boogert John Adams Institute at Royal Holloway Office : Wilson Building (RHUL) W251 Email : sboogert@pp.rhul.ac.uk Telephone : 01784 414062 Lectures aims High energy physics

More information

Bunch Compressor for the TESLA Linear Collider

Bunch Compressor for the TESLA Linear Collider TESLA-2-4 2 Bunch Compressor for the TESLA Linear Collider W. Decking, G. Hoffstaetter, T. Limberg DESY, Notkestraße 85, 2263 Hamburg, Germany September 2 Abstract We discuss different bunch compression

More information

Diagnostic Systems for Characterizing Electron Sources at the Photo Injector Test Facility at DESY, Zeuthen site

Diagnostic Systems for Characterizing Electron Sources at the Photo Injector Test Facility at DESY, Zeuthen site 1 Diagnostic Systems for Characterizing Electron Sources at the Photo Injector Test Facility at DESY, Zeuthen site Sakhorn Rimjaem (on behalf of the PITZ team) Motivation Photo Injector Test Facility at

More information

Run II Status and Prospects

Run II Status and Prospects Run II Status and Prospects Jeff Spalding Fermilab June 14, 2004 Run II Status and Prospects - Spalding 1 Contents Introduction Major elements of the Run II campaign Present performance Status of the upgrade

More information

OPTIMIZING RF LINACS AS DRIVERS FOR INVERSE COMPTON SOURCES: THE ELI-NP CASE

OPTIMIZING RF LINACS AS DRIVERS FOR INVERSE COMPTON SOURCES: THE ELI-NP CASE OPTIMIZING RF LINACS AS DRIVERS FOR INVERSE COMPTON SOURCES: THE ELI-NP CASE C. Vaccarezza, D. Alesini, M. Bellaveglia, R. Boni, E. Chiadroni, G. Di Pirro, M. Ferrario, A. Gallo, G. Gatti, A. Ghigo, B.

More information

Energy Calibration of the LHC Beams at 4 TeV

Energy Calibration of the LHC Beams at 4 TeV EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN ACCELERATORS AND TECHNOLOGY SECTOR CERN-ATS-213-4 Energy Calibration of the LHC Beams at 4 TeV J. Wenninger Abstract The mixed proton and lead ion run in

More information

Der lange Weg zu 200 GeV : Luminosität und höchste Energien bei LEP

Der lange Weg zu 200 GeV : Luminosität und höchste Energien bei LEP Der lange Weg zu 200 GeV : Luminosität und höchste Energien bei LEP J. Wenninger CERN SPS/LEP Operation Introduction Beam energies of 100 GeV and more... Luminosity performance Beam energy calibration

More information

Plans for the LHC Luminosity Upgrade Summary of the CARE-HHHAPD-LUMI-05 workshop

Plans for the LHC Luminosity Upgrade Summary of the CARE-HHHAPD-LUMI-05 workshop Plans for the LHC Luminosity Upgrade Summary of the APD-LUMI-05 workshop Walter Scandale CERN AT department LHC project seminar Geneva, 10 November 2005 We acknowledge the support of the European Community-Research

More information

Accelerator Physics Homework #3 P470 (Problems: 1-5)

Accelerator Physics Homework #3 P470 (Problems: 1-5) Accelerator Physics Homework #3 P470 (Problems: -5). Particle motion in the presence of magnetic field errors is (Sect. II.2) y + K(s)y = B Bρ, where y stands for either x or z. Here B = B z for x motion,

More information

Main aim: Preparation for high bunch intensity operation with β*=3.5 m and crossing angle (-100 µrad in IR1 and +100 µrad in IR5)

Main aim: Preparation for high bunch intensity operation with β*=3.5 m and crossing angle (-100 µrad in IR1 and +100 µrad in IR5) Week 24 Main aim: Preparation for high bunch intensity operation with β*=3.5 m and crossing angle (-100 µrad in IR1 and +100 µrad in IR5) Commission systems required for guaranteeing beam stability as

More information