Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator
|
|
- Hector Bruce
- 6 years ago
- Views:
Transcription
1 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 of Physics and Astronomy Particle Beam Physics Laboratory Los Angeles, CA USA D. Alesini INFN Laboratori Nazionali di Frascati Rome, Italy Workshop on the Physics and Applications of High Brightness Electron Beams Erice, Sicily Oct 9-14, 2005
2 The Plasma Wakefield Accelerator (PWFA) Overdense Plasma n b < n p ; k p! z > 1 current neutralized n b < n p ; k p! r << 1 self-focused Bingham, R. Nature, 394, 617 (1998). Underdense Plasma n b /n p > " 2 unfocused " 2 > n b /n p > 1 ion focused (blowout) Wake Fields in Blowout Regime Blowout Regime Mechanism: Plasma electrons disturbed by drive beam. Longitudinal space-charge wave generated. Ion channel created, pulls electrons back. Ion focusing is linear in r. Accelerating electric field, E acc n 0 1/2 [V/cm] Rosenzweig, et al. PRA, 44, R6189 (1991)
3 Overview of Drive Beam Issues for Blowout Regime of PWFA Longitudinal bunch shape High beam brightness High charge Strong Focusing Betatron matching Creation of a Witness Bunch Chen, P., Su, J., and Dawson, J. SLAC PUB 3662 (1985). Transformer Ratio: E + = acc.field;e! = decc.field R = E + / E! = k p L z R > 2 if L z > 2k p triangle doorstep ideal
4 Overview of Drive Beam Issues for Blowout Regime of PWFA Longitudinal bunch shape High beam brightness High charge Strong Focusing Betatron matching Creation of a Witness Bunch! r,max = Q / e! 4"n 0! N,max = p 2 " 0 r,max z mc B min = 2cQ 2 # eq! N,max " z
5 Overview of Drive Beam Issues for Blowout Regime of PWFA Longitudinal bunch shape High beam brightness High charge Strong Focusing Betatron matching Creation of a Witness Bunch
6 The UCLA Neptune Laboratory Beam Charge: Beam energy: Emittance: Power Source: RF Frequency: Cathode laser: Laser pulse length: pc up to 15 MeV $ N = 6 mm mrad 18 MW Klystron GHz µj at # = 266 nm 5 ps RMS 1.6-Cell Photoinjector 7&2/2 Cell PWT Linac
7 Neptune Dogleg Compressor S-Bahn Compressor S-Bahn is a dogleg or dispersionless translating section. Half-chicane with focusing elements between the bends. Can be operated in a nondispersive mode with symmetric beta function and 2" betatron advance. Like a chicane, may be used as a bunch-length compressor. Nominal first order temporal dispersion (R56=-5cm) is suitable for beam-shaping.
8 Neptune Dogleg Compressor PARMELA Simulation Results: 1000 particles, 300pC Initial Final: Sextupoles Off Final: Sextupoles On $ x,n (initial) =4.9 µm %$ x,n =9.9 µm+12.7 µm = 22.6 µm 2D PIC Simulation 5 GeV/m gradients 6 nc drive beam w/ n 0 =2e16 cm -3 space-charge nonlinear total GUN PWT Pre-Focus sextupoles Final Focus
9 Neptune Dogleg Compressor ELEGANT: Simulated Witness Beam For PWFA application, drive beam needs a witness beam to accelerate. Region of high dispersion in x Strong correlation b/w x and z Insert mask in x to sever beam in z No mask inserted Undercorrected with sextupoles to elongate profile With 1cm mask inserted at above location witness beam ramped drive beam
10 Temporal Bunch Shaping: Diagnostic Deflecting Mode Cavity Courtesy of D. Alesini DEFLECTING VOLTAGE! x x B Lowest dipole mode is TM 110 Zero electric field on-axis (in pillbox approx.) Deflection is purely magnetic Polarization selection requires asymmetry L B x " f x' = RF L B 2P ce / e RF R! DEFLECTOR BUNCH L x B " f = RF LL B 2P ce / e RF R! J.D. Fuerst,, et. al., DESY Report CDR98, 1998 E z = E 0 J 1 (!r)e i" ; J B r = B 1 (!r) 0 e i" ;!r B " = ib 0 J 1 #(!r)e i" ; Pillbox Fields on axis &r = 0 E z = 0 ; B x = B 0 2 ; B y = i B 0 2 ;
11 Deflecting Cavity: Power & Resolution screen deflection: V! >> V min = " x,0u / e L#" t f 2! x, f =! x,0! t,min =! x,0u / e L"V # f 2 +! def! def = 2! z L "V # f cu / e cos($ 0 ) 1 (! 0 " 0) V!,design = 3V min = 545kV! t,min = 545 fs! x, f = beam size at screen with deflector on;! x,0 = 0.3mm = beam size at screen with deflector off; L = 43cm = drift from deflector to screen; f = 9.6GHz = RF frequency; V " = deflecting voltage; R " = 820k# = transverse shunt impedance per cell; P in = input RF power; U = 12MeV = electron beam energy; $ 0 = deflector injection phase = 0;! t,min = minimum resolvable rms bunch length; %x = 30µm = spatial resolution of screen & optics; %t = effective temporal resolution of deflector;!t =!x U / e L" fr # 1/2 np in n=1 n=3 n=7 n=5 45 fs 50 kw n=9 9 cells; 50 kw; 50 fs resolution
12 ELEGANT Simulations ELEGANT Simulation Results Using RFDF element with 9 cells 10,000 macroparticles Shunt Impedance: R T = 6.12 MΩ Power: P = V 02 /R T Initial Current Profile V 0 = 0 ; P = 0 V 0 = 272 kv ; P = 12 kw V 0 = 545 kv ; P = 48 kw V 0 = 609 kv ; P = 61 kw
13 Deflecting Cavity: HFSS Design DIMENSION VALUE [mm] t d a 5 b3 b b2 b b1 b b b b HFSS Geometry of 1/2 structure t 3.0 d X-Band, 9-cell design. Collaboration with INFL Frascatti. Will be built at UCLA; diffusion bonded at SLAC. Powered by a VA-24G X-Band 50 kw. Frequency: GHz
14 Deflecting Cavity: HFSS Design out of phase by 90 E-field H-field P in = 50kW V! = 1 e " F! dz = 528kV R! = V! 2 / P in = 5.6M# Resonance of the #-Mode
15 Deflecting Cavity: Polarization Separation Rods Holes Rods give greater better mode separation but shift the desired mode too much Holes give less mode separation (5 MHz) but only perturb desired mode by 2 MHz (within range of temperature tuning). Holes look like better option: 5 MHz is large compared to the resonance width Undesired Desired Undesired Desired MHz +53 MHz -7 MHz -2 MHz
16 Prototype Cavity
17 Constraints on Brightness & Emittance blowout regime transformer ratio betatron matching n 0 > mc2!e 2 L n b = Q / e! r <! max = k!" 2 r " p = 4!r e n 0! N = "# $ r 2 Q / e 2cQ z 4"n 0! z! N <! N max = "# $ max "1 n b >> > 4n n 0 R > 2! L > 2k p # eq B > B min =! r =! eq = " / (2#r e n 0 ) 2 # 2 r! N max " z Q=300 pc ; L=2mm;! z = 0.5 mm ~110 µm ~50 mm mrad ~250 ma/µm 2 n 0min ~ 2.8x10 13 cm -3
18 Permanent Magnet Quad Focusing standard iron quads PowerTrace 1.08 Simulation PMQs (110 T/m) ELEGANT Simulation Result "=25.7; E=13.13 MeV; Q = 300 pc! x =130 µm; $ x =41 mm mrad! y =57 µm; $ y =15 mm mrad! z =0.51 mm;! ' =1.84% B! 2Q /! t " N,x " N,y = 412mA / µm 2
19 Scaling to Higher Charge: 4 nc n 0 > mc2!e 2 L! r <! max = Q / e! 4"n 0! N <! N max = "# $ 2 max z # eq B > B min = 2cQ 2! N max " z Q=4 nc ; L=4mm;! z = 1 mm ~500 µm ~420 mm mrad ~12mA/µm 2 n 0min ~ 0.8x10 13 cm -3
20 Scaling to Higher Charge: 4 nc scaling applied to laser at cathode:! x,! y,! t " Q 1/3 (Q : 300 pc # 4nC) Q = 4 nc; pt-to-pt space charge UCLA-Parmela 2.0, 1000 particles $ N ~ 25 mm mrad simulation of gun and linac w/solenoid for emittance compensation GUN PWT Pre-Focus Final Focus sextupoles
21 Scaling to Higher Charge: 4 nc scaling applied to laser at cathode:! x,! y,! t " Q 1/3 (Q : 300 pc # 4nC) dispersion killed to 1st Order longitudinal ph. space and profile at end ELEGANT, 1000 particles simulation of sbahn and final focus horizontal dispersion killed to first order (R 16,R 26 ) 2nd order longitudinal dispersion T 566 killed! N,x = 742 mm mrad! N,y = 456 mm mrad tail is 3rd order (U 5666 ) octupoles needed? GUN PWT Pre-Focus Final Focus sextupoles
22 Scaling to Higher Charge: 4 nc scaling applied to laser at cathode:! x,! y,! t " Q 1/3 (Q : 300 pc # 4nC) dispersion killed to 2nd Order longitudinal ph. space and profile at end ELEGANT, 1000 particles simulation of sbahn and final focus horizontal dispersion killed to second order 2nd order longitudinal dispersion not killed! N,x = 96 mm mrad! N,y = 141 mm mrad tail is 2nd and 3rd order (T 566, U 5666 ) GUN PWT Pre-Focus sextupoles Final Focus
23 Conclusions PWFA drive issues: ramped profile, strong focus, high charge Ramped profile: - improved transformer ratio (R > 2) - feasible using dogleg compression with sextupoles - deflecting cavity diagnostic (50 fs resolution) Strong focus: - traditional EM quads + permanent magnet quadrupoles - adequate emittance and brightness (~ 100 µm, 450 ma/µm 300 pc) High Charge: - scaling to high charge (~4 nc) at Neptune has some dilemmas - tradeoff between optimal profile and good emittance - extra sextupoles and octupoles may be required - beam sizes become bigger than the beam pipes - implies complete or partial redesign of the compressor
UCLA Neptune Ramped Bunch Experiment. R. Joel England UCLA Department of Physics and Astronomy Particle Beam Physics Laboratory May 19, 2004
UCLA Neptune Ramped Bunch Experiment R. Joel England UCLA Department of Physics and Astronomy Particle Beam Physics Laboratory May 19, 2004 Outline 1. Background & Motivation 2. Neptune Dogleg Compressor
More informationSextupole correction of the longitudinal transport of relativistic beams in dispersionless translating sections
PHYSICAL REVIEW SPECIAL TOPICS - ACCELERATORS AND BEAMS 8, 1281 (25) Sextupole correction of the longitudinal transport of relativistic beams in dispersionless translating sections R. J. England, J. B.
More informationFACET-II Design Update
FACET-II Design Update October 17-19, 2016, SLAC National Accelerator Laboratory Glen White FACET-II CD-2/3A Director s Review, August 9, 2016 Planning for FACET-II as a Community Resource FACET-II Photo
More informationHigh gradient, high average power structure development at UCLA and Univ. Rome in X-X. band
High gradient, high average power structure development at UCLA and Univ. Rome in X-X and S-S band May 23-25, 25, 2007 US High Gradient Research Collaboration Workshop Atsushi Fukasawa, James Rosenzweig,
More informationX-band RF driven hard X-ray FELs. Yipeng Sun ICFA Workshop on Future Light Sources March 5-9, 2012
X-band RF driven hard X-ray FELs Yipeng Sun ICFA Workshop on Future Light Sources March 5-9, 2012 Motivations & Contents Motivations Develop more compact (hopefully cheaper) FEL drivers, L S C X-band (successful
More informationLOLA: Past, present and future operation
LOLA: Past, present and future operation FLASH Seminar 1/2/29 Christopher Gerth, DESY 8/5/29 FLASH Seminar Christopher Gerth 1 Outline Past Present Future 8/5/29 FLASH Seminar Christopher Gerth 2 Past
More informationLCLS Injector Straight Ahead Spectrometer C.Limborg-Deprey Stanford Linear Accelerator Center 8 th June 2005
LCLS Injector Straight Ahead Spectrometer C.Limborg-Deprey Stanford Linear Accelerator Center 8 th June 2005 Summary The spectrometer design was modified to allow the measurement of uncorrelated energy
More informationRF DEFLECTOR DESIGN AND MEASUREMENTS FOR THE LONGITUDINAL AND TRANSVERSE PHASE SPACE CHARACTERIZATION AT SPARC. Abstract
1 RF DEFLECTOR DESIGN AND MEASUREMENTS FOR THE LONGITUDINAL AND TRANSVERSE PHASE SPACE CHARACTERIZATION AT SPARC David Alesini 1, Luca Ficcadenti 2, Giampiero Di Pirro 1, Andrea Mostacci 1,2, Luigi Palumbo
More informationFURTHER UNDERSTANDING THE LCLS INJECTOR EMITTANCE*
Proceedings of FEL014, Basel, Switzerland FURTHER UNDERSTANDING THE LCLS INJECTOR EMITTANCE* F. Zhou, K. Bane, Y. Ding, Z. Huang, and H. Loos, SLAC, Menlo Park, CA 9405, USA Abstract Coherent optical transition
More informationLinac Driven Free Electron Lasers (III)
Linac Driven Free Electron Lasers (III) Massimo.Ferrario@lnf.infn.it SASE FEL Electron Beam Requirements: High Brightness B n ( ) 1+ K 2 2 " MIN r #$ % &B! B n 2 n K 2 minimum radiation wavelength energy
More informationExperimental Measurements of the ORION Photoinjector Drive Laser Oscillator Subsystem
Experimental Measurements of the ORION Photoinjector Drive Laser Oscillator Subsystem D.T Palmer and R. Akre Laser Issues for Electron RF Photoinjectors October 23-25, 2002 Stanford Linear Accelerator
More informationLow slice emittance preservation during bunch compression
Low slice emittance preservation during bunch compression S. Bettoni M. Aiba, B. Beutner, M. Pedrozzi, E. Prat, S. Reiche, T. Schietinger Outline. Introduction. Experimental studies a. Measurement procedure
More informationIntroduction. Thermoionic gun vs RF photo gun Magnetic compression vs Velocity bunching. Probe beam design options
Introduction Following the 19/05/04 meeting at CERN about the "CTF3 accelerated programme", a possible french contribution has been envisaged to the 200 MeV Probe Beam Linac Two machine options were suggested,
More informationFemto 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 informationSPPS: The SLAC Linac Bunch Compressor and Its Relevance to LCLS
LCLS Technical Advisory Committee December 10-11, 2001. SPPS: The SLAC Linac Bunch Compressor and Its Relevance to LCLS Patrick Krejcik LCLS Technical Advisory Committee Report 1: July 14-15, 1999 The
More informationLCLS Injector Prototyping at the GTF
LCLS Injector Prototyping at at the GTF John John Schmerge, SLAC SLAC November 3, 3, 23 23 GTF GTF Description Summary of of Previous Measurements Longitudinal Emittance Transverse Emittance Active LCLS
More informationParameter selection and longitudinal phase space simulation for a single stage X-band FEL driver at 250 MeV
Parameter selection and longitudinal phase space simulation for a single stage X-band FEL driver at 25 MeV Yipeng Sun and Tor Raubenheimer, Juhao Wu SLAC, Stanford, CA 9425, USA Hard x-ray Free electron
More informationOptimum beam creation in photoinjectors using spacecharge expansion II: experiment
Optimum beam creation in photoinjectors using spacecharge expansion II: experiment J. Rosenzweig, A. Cook, M. Dunning, R.J. England, G. Travish, UCLA P. Musumeci, C. Vicario, D. Filippetto, M. Ferrario,
More informationFACET-II Design, Parameters and Capabilities
FACET-II Design, Parameters and Capabilities 217 FACET-II Science Workshop, October 17-2, 217 Glen White Overview Machine design overview Electron systems Injector, Linac & Bunch compressors, Sector 2
More informationObservation of Ultra-Wide Bandwidth SASE FEL
Observation of Ultra-Wide Bandwidth SASE FEL Gerard Andonian Particle Beam Physics Laboratory University of California Los Angeles The Physics and Applications of High Brightness Electron Beams Erice,
More informationThe UCLA/LLNL Inverse Compton Scattering Experiment: PLEIADES
The UCLA/LLNL Inverse Compton Scattering Experiment: PLEIADES J.B. Rosenzweig UCLA Department of Physics and Astronomy 23 Giugno, 2003 Introduction Inverse Compton scattering provides a path to 4th generation
More informationLecture 5: Photoinjector Technology. J. Rosenzweig UCLA Dept. of Physics & Astronomy USPAS, 7/1/04
Lecture 5: Photoinjector Technology J. Rosenzweig UCLA Dept. of Physics & Astronomy USPAS, 7/1/04 Technologies Magnetostatic devices Computational modeling Map generation RF cavities 2 cell devices Multicell
More informationAccelerator Physics Issues of ERL Prototype
Accelerator Physics Issues of ERL Prototype Ivan Bazarov, Geoffrey Krafft Cornell University TJNAF ERL site visit (Mar 7-8, ) Part I (Bazarov). Optics. Space Charge Emittance Compensation in the Injector
More informationThe New Superconducting RF Photoinjector a High-Average Current & High-Brightness Gun
The New Superconducting RF Photoinjector a High-Average Current & High-Brightness Gun Jochen Teichert for the BESSY-DESY-FZD-MBI collaboration and the ELBE crew High-Power Workshop, UCLA, Los Angeles 14
More informationGeneration and characterization of ultra-short electron and x-ray x pulses
Generation and characterization of ultra-short electron and x-ray x pulses Zhirong Huang (SLAC) Compact XFEL workshop July 19-20, 2010, Shanghai, China Ultra-bright Promise of XFELs Ultra-fast LCLS Methods
More informationSRF GUN CHARACTERIZATION - PHASE SPACE AND DARK CURRENT MEASUREMENTS AT ELBE*
SRF GUN CHARACTERIZATION - PHASE SPACE AND DARK CURRENT MEASUREMENTS AT ELBE* E. Panofski #, A. Jankowiak, T. Kamps, Helmholtz-Zentrum Berlin, Berlin, Germany P.N. Lu, J. Teichert, Helmholtz-Zentrum Dresden-Rossendorf,
More informationBeam Dynamics. Gennady Stupakov. DOE High Energy Physics Review June 2-4, 2004
Beam Dynamics Gennady Stupakov DOE High Energy Physics Review June 2-4, 2004 Beam Dynamics Research in ARDA Broad expertise in many areas: lattice design, collective effects, electron cloud, beam-beam
More informationThe UCLA/NICADD Plasma Density Transition Trapping Experiment
The UCLA/NICADD Plasma Density Transition Traing Exeriment M.C. Thomson, J.B. Rosenzweig, G. Travish UCLA Deartment of Physics and Astronomy N. Barov Northern Illinois University Deartment of Physics H.
More informationSL_COMB. The SL_COMB experiment at SPARC_LAB will operate in the so-called quasinonlinear regime, defined by the dimensionless charge quantity
SL_COMB E. Chiadroni (Resp), D. Alesini, M. P. Anania (Art. 23), M. Bellaveglia, A. Biagioni (Art. 36), S. Bini (Tecn.), F. Ciocci (Ass.), M. Croia (Dott), A. Curcio (Dott), M. Daniele (Dott), D. Di Giovenale
More informationTime resolved transverse and longitudinal phase space measurements at the high brightness photo injector PITZ
Time resolved transverse and longitudinal phase space measurements at the high brightness photo injector PITZ 1. Motivation 2. Transverse deflecting structure 3. Longitudinal phase space tomography 4.
More informationTuning Techniques And Operator Diagnostics for FACET at SLAC National Accelerator Laboratory. Chris Melton SLAC Accelerator Operations
Tuning Techniques And Operator Diagnostics for FACET at SLAC National Accelerator Laboratory Chris Melton SLAC Accelerator Operations FACET Tuning And Diagnostics What is FACET? FACET Performance Challenges
More informationDiagnostic Systems for High Brightness Electron Injectors
Diagnostic Systems for High Brightness Electron Injectors Henrik Loos 48 th ICFA Advanced Beam Dynamics Workshop on Future Light Sources SLAC 2010 1 1 Henrik Loos LCLS Injector Injector Diagnostics Characterize
More informationX-ray Free-electron Lasers
X-ray Free-electron Lasers Ultra-fast Dynamic Imaging of Matter II Ischia, Italy, 4/30-5/3/ 2009 Claudio Pellegrini UCLA Department of Physics and Astronomy Outline 1. Present status of X-ray free-electron
More informationLongitudinal Top-up Injection for Small Aperture Storage Rings
Longitudinal Top-up Injection for Small Aperture Storage Rings M. Aiba, M. Böge, Á. Saá Hernández, F. Marcellini and A. Streun Paul Scherrer Institut Introduction Lower and lower horizontal emittances
More informationRF deflector design and measurements for the longitudinal and transverse phase space characterization at SPARC
Nuclear Instruments and Methods in Physics Research A 568 (2006) 488 502 www.elsevier.com/locate/nima RF deflector design and measurements for the longitudinal and transverse phase space characterization
More information6 Bunch Compressor and Transfer to Main Linac
II-159 6 Bunch Compressor and Transfer to Main Linac 6.1 Introduction The equilibrium bunch length in the damping ring (DR) is 6 mm, too long by an order of magnitude for optimum collider performance (σ
More informationThe VISA II Experiment
The VISA II Experiment A study in electron beam dynamics and high gain, ultra short pulses in SASE FEL. Gerard Andonian PBPL UCLA DoE Review May 18, 2004 Experiment Timeline VISA I Re-commissioning FEL
More informationII) Experimental Design
SLAC Experimental Advisory Committee --- September 12 th, 1997 II) Experimental Design Theory and simulations Great promise of significant scientific and technological achievements! How to realize this
More informationThe VISA II Experiment
The VISA II Experiment A study in electron beam dynamics and high gain, ultra short pulses in SASE FEL. Gerard Andonian UCLA PBPL Seminar Series July 21, 2004 Some Acronyms Definitions of some of the terms
More informationDiagnostic 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 informationSPARCLAB. Source For Plasma Accelerators and Radiation Compton. On behalf of SPARCLAB collaboration
SPARCLAB Source For Plasma Accelerators and Radiation Compton with Laser And Beam On behalf of SPARCLAB collaboration EMITTANCE X X X X X X X X 2 BRIGHTNESS (electrons) B n 2I nx ny A m 2 rad 2 The current
More informationASTRA simulations of the slice longitudinal momentum spread along the beamline for PITZ
ASTRA simulations of the slice longitudinal momentum spread along the beamline for PITZ Orlova Ksenia Lomonosov Moscow State University GSP-, Leninskie Gory, Moscow, 11999, Russian Federation Email: ks13orl@list.ru
More informationLCLS Accelerator Parameters and Tolerances for Low Charge Operations
LCLS-TN-99-3 May 3, 1999 LCLS Accelerator Parameters and Tolerances for Low Charge Operations P. Emma SLAC 1 Introduction An option to control the X-ray FEL output power of the LCLS [1] by reducing the
More informationLattice 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 informationX-Band RF Harmonic Compensation for Linear Bunch Compression in the LCLS
SLAC-TN-5- LCLS-TN-1-1 November 1,1 X-Band RF Harmonic Compensation for Linear Bunch Compression in the LCLS Paul Emma SLAC November 1, 1 ABSTRACT An X-band th harmonic RF section is used to linearize
More informationInverse Compton Scattering Sources from Soft X-rays to γ-rays
Inverse Compton Scattering Sources from Soft X-rays to γ-rays J.B. Rosenzweig UCLA Department of Physics and Astronomy 21 Ottobre, 2004 Introduction Inverse Compton scattering provides a path to 4th generation
More informationFirst propositions of a lattice for the future upgrade of SOLEIL. A. Nadji On behalf of the Accelerators and Engineering Division
First propositions of a lattice for the future upgrade of SOLEIL A. Nadji On behalf of the Accelerators and Engineering Division 1 SOLEIL : A 3 rd generation synchrotron light source 29 beamlines operational
More informationLinear Collider Collaboration Tech Notes
LCC 0035 07/01/00 Linear Collider Collaboration Tech Notes More Options for the NLC Bunch Compressors January 7, 2000 Paul Emma Stanford Linear Accelerator Center Stanford, CA Abstract: The present bunch
More informationStanford Linear Accelerator Center
LCLS Linac Overview Vinod Bharadwaj Stanford Linear Accelerator Center Vinod Bharadwaj Linac Overview 15 min Gennady Stupakov CSR Effects- Theory 20 min Paul Emma LCLS Linac Update 20 min Mike Borland
More informationLongitudinal Measurements at the SLAC Gun Test Facility*
SLAC-PUB-9541 September Longitudinal Measurements at the SLAC Gun Test Facility* D. H. Dowell, P. R. Bolton, J.E. Clendenin, P. Emma, S.M. Gierman, C.G. Limborg, B.F. Murphy, J.F. Schmerge Stanford Linear
More informationX-band Experience at FEL
X-band Experience at FERMI@Elettra FEL Gerardo D Auria Elettra - Sincrotrone Trieste GdA_TIARA Workshop, Ångström Laboratory, June 17-19, 2013 1 Outline The FERMI@Elettra FEL project Machine layout and
More informationCOMBINER 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 informationLinac 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 informationICFA ERL Workshop Jefferson Laboratory March 19-23, 2005 Working Group 1 summary Ilan Ben-Zvi & Ivan Bazarov
ICFA ERL Workshop Jefferson Laboratory March 19-23, 2005 Working Group 1 summary Ilan Ben-Zvi & Ivan Bazarov Sincere thanks to all WG1 participants: Largest group, very active participation. This summary
More informationThe High Power Electrodynamics Group at Los Alamos National Laboratory
The High Power Electrodynamics Group at Los Alamos National Laboratory Steven J. Russell Los Alamos National Laboratory Slide 1 Los Alamos National Laboratory Valles Caldera Los Alamos Slide 2 Los Alamos
More informationAn 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 informationIonization Injection and Acceleration of Electrons in a Plasma Wakefield Accelerator at FACET
Ionization Injection and Acceleration of Electrons in a Plasma Wakefield Accelerator at FACET N. Vafaei-Najafabadi 1, a), C.E. Clayton 1, K.A. Marsh 1, W. An 1, W. Lu 1,, W.B. Mori 1, C. Joshi 1, E. Adli
More informationDesign of an RF Photo-Gun (PHIN)
Design of an RF Photo-Gun (PHIN) R. Roux 1, G. Bienvenu 1, C. Prevost 1, B. Mercier 1 1) CNRS-IN2P3-LAL, Orsay, France Abstract In this note we show the results of the RF simulations performed with a 2-D
More informationPAL LINAC UPGRADE FOR A 1-3 Å XFEL
PAL LINAC UPGRADE FOR A 1-3 Å XFEL J. S. Oh, W. Namkung, Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Korea Y. Kim, Deutsches Elektronen-Synchrotron DESY, D-603 Hamburg, Germany Abstract With
More informationFemto-second FEL Generation with Very Low Charge at LCLS
Femto-second FEL Generation with Very Low Charge at LCLS Yuantao Ding, For the LCLS commissioning team X-ray Science at the Femtosecond to Attosecond Frontier workshop May 18-20, 2009, UCLA SLAC-PUB-13525;
More informationBeam Dynamics in a Hybrid Standing Wave- Traveling Wave Photoinjector
Beam Dynamics in a Hybrid Standing Wave- Traveling Wave Photoinjector J. Rosenzweig, D. Alesini, A. Boni, M. Ferrario, A. Fukusawa, A. Mostacci $, B. O Shea, L. Palumbo $, B. Spataro UCLA Dept. of Physics
More informationCompact Linac for Deuterons (Based on IH Structures with PMQ Focusing)
Compact Linac for Deuterons (Based on IH Structures with PMQ Focusing) S. Kurennoy, J. O Hara, L. Rybarcyk LANL, Los Alamos, NM Thanks to D. Barlow, F. Neri, and T. Wangler We are developing a compact
More informationResults of the Energy Doubler Experiment at SLAC
Results of the Energy Doubler Experiment at SLAC Mark Hogan 22nd Particle Accelerator Conference 2007 June 27, 2007 Work supported by Department of Energy contracts DE-AC02-76SF00515 (SLAC), DE-FG03-92ER40745,
More informationExpected properties of the radiation from VUV-FEL / femtosecond mode of operation / E.L. Saldin, E.A. Schneidmiller, M.V. Yurkov
Expected properties of the radiation from VUV-FEL / femtosecond mode of operation / E.L. Saldin, E.A. Schneidmiller, M.V. Yurkov TESLA Collaboration Meeting, September 6-8, 2004 Experience from TTF FEL,
More informationParticle Accelerators Projects in Iran (Focused on the IPM recent and future projects)
Particle Accelerators Projects in Iran (Focused on the IPM recent and future projects) Hamed Shaker School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM) History During
More informationCharacterization of an 800 nm SASE FEL at Saturation
Characterization of an 800 nm SASE FEL at Saturation A.Tremaine*, P. Frigola, A. Murokh, C. Pellegrini, S. Reiche, J. Rosenzweig UCLA, Los Angeles, CA 90095 M. Babzien, I. Ben-Zvi, E. Johnson, R. Malone,
More informationSLS 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 informationPhotoinjector design for the LCLS
SLAC-PUB-8962 LCLS-TN-01-05 Revised November 2001 Photoinjector design for the LCLS P.R. Bolton a, J.E. Clendenin a, D.H. Dowell a, M. Ferrario b, A.S. Fisher a, S.M. Gierman a, R.E. Kirby a, P. Krejcik
More information4GLS 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 informationFast Simulation of FEL Linacs with Collective Effects. M. Dohlus FLS 2018
Fast Simulation of FEL Linacs with Collective Effects M. Dohlus FLS 2018 A typical X-FEL gun environment photo cathode cavity, solenoid, drift straight cavity, quadrupole, drift dispersive bend, quadrupole,
More informationEmittance 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 informationLCLS-II SCRF start-to-end simulations and global optimization as of September Abstract
SLAC National Accelerator Lab LCLS-II TN-17-4 February 217 LCLS-II SCRF start-to-end simulations and global optimization as of September 216 G. Marcus SLAC, Menlo Park, CA 9425 J. Qiang LBNL, Berkeley,
More informationE-886 (Piot) Advanced Accelerator Physics Experiments at the Fermilab/NICADD Photoinjector Laboratory (FNPL)
E-886 (Piot) Advanced Accelerator Physics Experiments at the Fermilab/NICADD Photoinjector Laboratory (FNPL) Chicago, DESY, Fermilab, Georgia, INFN-Milano, LBNL, Northern Illinois, Rochester, UCLA Status:
More information$)ODW%HDP(OHFWURQ6RXUFHIRU/LQHDU&ROOLGHUV
$)ODW%HDP(OHFWURQ6RXUFHIRU/LQHDU&ROOLGHUV R. Brinkmann, Ya. Derbenev and K. Flöttmann, DESY April 1999 $EVWUDFW We discuss the possibility of generating a low-emittance flat (ε y
More informationSimulations for photoinjectors C.Limborg
Simulations for photoinjectors C.Limborg 1- GTF Simulations Parmela modeling improvements Comparison to experimental results: 2ps & 4ps Sensitivity study Plans for future simulations 2- LCLS Injector Simulations
More informationPower efficiency vs instability (or, emittance vs beam loading) Sergei Nagaitsev, Valeri Lebedev, and Alexey Burov Fermilab/UChicago Oct 18, 2017
Power efficiency vs instability (or, emittance vs beam loading) Sergei Nagaitsev, Valeri Lebedev, and Alexey Burov Fermilab/UChicago Oct 18, 2017 Acknowledgements We would like to thank our UCLA colleagues
More informationTransverse emittance measurements on an S-band photocathode rf electron gun * Abstract
SLAC PUB 8963 LCLS-01-06 October 2001 Transverse emittance measurements on an S-band photocathode rf electron gun * J.F. Schmerge, P.R. Bolton, J.E. Clendenin, F.-J. Decker, D.H. Dowell, S.M. Gierman,
More informationS2E (Start-to-End) Simulations for PAL-FEL. Eun-San Kim
S2E (Start-to-End) Simulations for PAL-FEL Aug. 25 2008 Kyungpook Nat l Univ. Eun-San Kim 1 Contents I Lattice and layout for a 10 GeV linac II Beam parameters and distributions III Pulse-to-pulse stability
More informationLattice Design of 2-loop Compact ERL. High Energy Accelerator Research Organization, KEK Miho Shimada and Yukinori Kobayashi
Lattice Design of 2-loop Compact ERL High Energy Accelerator Research Organization, KEK Miho Shimada and Yukinori Kobayashi Introduction Wepromote the construction of the compact Energy Recovery Linac(cERL)
More informationFirst results from the plasma wakefield acceleration transverse studies at FACET
First results from the plasma wakefield acceleration transverse studies at FACET Erik Adli (University of Oslo, Norway and SLAC) For the FACET E200 collaboration : M.J. Hogan, S. Corde, R.J. England, J.
More informationSimulations of the IR/THz Options at PITZ (High-gain FEL and CTR)
Case Study of IR/THz source for Pump-Probe Experiment at the European XFEL Simulations of the IR/THz Options at PITZ (High-gain FEL and CTR) Introduction Outline Simulations of High-gain FEL (SASE) Simulation
More informationE200: Plasma Wakefield Accelera3on
E200: Plasma Wakefield Accelera3on Status and Plans Chan Joshi University of California Los Angeles For the E200 Collabora3on SAREC Mee3ng, SLAC : Sept 15-17 th 2014 Work Supported by DOE Experimental
More informationCurriculum Vitae RESEARCH INTERESTS: WORK HISTORY:
R. Joel England SLAC National Accelerator Laboratory 2575 Sand Hill Rd, Bld 41, Rm 144B Menlo Park, CA 94025 Voice: 650-926-3706 / Fax: 650-926-4365 E-mail: england@slac.stanford.edu Curriculum Vitae RESEARCH
More information(M. Bowler, C. Gerth, F. Hannon, H. Owen, B. Shepherd, S. Smith, N. Thompson, E. Wooldridge, N. Wyles)
Optics considerations for ERL test facilities Bruno Muratori ASTeC Daresbury Laboratory (M. Bowler, C. Gerth, F. Hannon, H. Owen, B. Shepherd, S. Smith, N. Thompson, E. Wooldridge, N. Wyles) Overview Optics
More informationEmittance and photocathodes
Cornell Laboratory for Accelerator-based ScienceS and Education () Emittance and photocathodes Ivan Bazarov Where we are today Injector performance Ongoing work Venues for improvements Next generation
More informationEmittance 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 informationMATTHEW COLIN THOMPSON
MATTHEW COLIN THOMPSON Office: University of California, Los Angeles 3-166 Knudsen Hall e-mail: mct@physics.ucla.edu Phone: 310 825-9982 EDUCATION Doctor of Philosophy Physics, June 2004, University of
More informationOPTIMIZING 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 informationLecture 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 informationExcitements and Challenges for Future Light Sources Based on X-Ray FELs
Excitements and Challenges for Future Light Sources Based on X-Ray FELs 26th ADVANCED ICFA BEAM DYNAMICS WORKSHOP ON NANOMETRE-SIZE COLLIDING BEAMS Kwang-Je Kim Argonne National Laboratory and The University
More informationNovel, Hybrid RF Injector as a High-average. Dinh Nguyen. Lloyd Young
Novel, Hybrid RF Injector as a High-average average-current Electron Source Dinh Nguyen Los Alamos National Laboratory Lloyd Young TechSource Energy Recovery Linac Workshop Thomas Jefferson National Accelerator
More informationVELA/CLARA as Advanced Accelerator Studies Test-bed at Daresbury Lab.
VELA/CLARA as Advanced Accelerator Studies Test-bed at Daresbury Lab. Yuri Saveliev on behalf of VELA and CLARA teams STFC, ASTeC, Cockcroft Institute Daresbury Lab., UK Outline VELA (Versatile Electron
More informationExcitements and Challenges for Future Light Sources Based on X-Ray FELs
Excitements and Challenges for Future Light Sources Based on X-Ray FELs 26th ADVANCED ICFA BEAM DYNAMICS WORKSHOP ON NANOMETRE-SIZE COLLIDING BEAMS Kwang-Je Kim Argonne National Laboratory and The University
More informationSTATUS OF E-157: METER-LONG PLASMA WAKEFIELD EXPERIMENT. Presented by Patrick Muggli for the E-157 SLAC/USC/LBNL/UCLA Collaboration
STATUS OF E-157: METER-LONG PLASMA WAKEFIELD EXPERIMENT Presented by Patrick Muggli for the E-157 SLAC/USC/LBNL/UCLA Collaboration OUTLINE Basic E-157 Acelleration, Focusing Plasma Source Diagnostics:
More informationSPARCLAB. Source For Plasma Accelerators and Radiation Compton with Laser And Beam
SPARCLAB Source For Plasma Accelerators and Radiation Compton with Laser And Beam EMITTANCE X X X X X X X X Introduction to SPARC_LAB 2 BRIGHTNESS (electrons) B n 2I nx ny A m 2 rad 2 The current can be
More informationInterstage Optics Design
Interstage Optics Design for a PWFA Linear Collider FACETII Workshop 2015 Oct 14, 2015 Carl A Lindstrøm PhD Student University of Oslo, Department of Physics Advisor: Erik Adli 1 Proposed layout of a PWFA
More informationPlasma Accelerator Based FELs Status of SLAC Task Force Efforts
Plasma Accelerator Based FELs Status of SLAC Task Force Efforts FACET-II Science Workshop October 17-20, 2017 Mark J. Hogan FACET-II Project Scientist FACET-II CD-2/3A Director s Review, August 9, 2016
More informationMultiparameter optimization of an ERL. injector
Multiparameter optimization of an ERL injector R. Hajima a, R. Nagai a a Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319 1195 Japan Abstract We present multiparameter optimization of an
More informationA 6 GeV Compact X-ray FEL (CXFEL) Driven by an X-Band Linac
A 6 GeV Compact X-ray FEL (CXFEL) Driven by an X-Band Linac Zhirong Huang, Faya Wang, Karl Bane and Chris Adolphsen SLAC Compact X-Ray (1.5 Å) FEL Parameter symbol LCLS CXFEL unit Bunch Charge Q 250 250
More informationPushing the limits of laser synchrotron light sources
Pushing the limits of laser synchrotron light sources Igor Pogorelsky National Synchrotron Light Source 2 Synchrotron light source With λ w ~ several centimeters, attaining XUV region requires electron
More information