UCLA Advanced Accelerator Program (excluding PWFA@FFTB)
description
Transcript of UCLA Advanced Accelerator Program (excluding PWFA@FFTB)
UCLA
UCLA Advanced Accelerator Program (excluding PWFA@FFTB)
UCLA Advanced Accelerator Program (excluding PWFA@FFTB)
J. Rosenzweig
Representing: D. Cline, C. Joshi, W. Mori, C. Pellegrini
HEPAP AARD Subpanel
Palo Alto, December 21, 2005
J. Rosenzweig
Representing: D. Cline, C. Joshi, W. Mori, C. Pellegrini
HEPAP AARD Subpanel
Palo Alto, December 21, 2005
UCLA
UCLA Program on Plasma Based Accelerators
C. Joshi, P.I. W. Mori, Co-P.I.
C. Clayton, Co-P.I.
Administrative SupportMaria Guerrero, 50%
EXPERIMENTSDr. Chris ClaytonDr. Sergei TochitskyKen MarshJay Sung, Neptune LabJoe Ralph, Neptune LabDevon Johnson, SLACFang Fang, Neptune LabDavid Auerbach, SLAC
Collaborators:Professors J. Rosenzweig & C. PellegriniProfessor R. Siemann, Dr. M. Hogan (SLAC)Professors T. Katsouleas & P. Muggli (USC)Professor B. Dangor, Dr. Z. Najmudin (IC-UK)
THEORY & SIMULATIONSProfessor Warren MoriDr. Frank Tsung, (Postdoc, 10%)
Chengkun Huang, Neptune, SLAC, (Postdoc 10%)Wei Lu, Neptune, SLACMiaomiao Zhou, Neptune, SLAC
UCLA Plasma Accelerator Group
Students
Staff
Students
Joshi/Mori Group
UCLA
1. Source of new ideas and techniques for plasma based acceleration–Long Range
2. Vigorous in-house experimental program on advanced accelerator research–Long Range
3. Plasma wakefield scheme as an afterburner for linear collider–medium range
4. Massively parallel computations for advanced accelerator research–medium range
5. Train students and postdocs
Goals of the Plasma Accelerator (Joshi-Mori) Group @ UCLA
UCLAStatistical Data
1. Funding: DOE-HEP @ $1 million/yr average since 1987
SciDAC ~ $170 K /year Theory and Simulations
NSF ~ $150 K/year
2. Facilities: Neptune @ UCLA, 1998 - present
FFTB @ SLAC, 1999 - present
SABER @ SLAC, as soon as it is built
3. Users at Neptune: Joshi, Rosenzweig, Pellegrini, Muggli,
Katsouleas
5
UCLA1. Source of New Ideas
• Plasma Beat Wave Accelerator (PBWA)• Plasma Wakefield Accelerator (PWFA)• Laser Wakefield Accelerator (LWFA)• Plasma and E.M. Wigglers for FELs• Tunable Radiation Generation Using
Ionizations Fronts• Plasma Lenses for Focusing particle
Beams• Cherenkov Radiation from Plasmas
UCLA
In-house Experimental Program on Plasma Acceleration: Highlights
(I)
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Electron energy (MeV)303
InjectionEnergy
TrappingEnergy
First demonstration of acceleration at > 1 GeV/m in plasma
Energy gain exceeded the trapping energy
PBWAEverett et. al., Nature 368, 527 (1994)
2.
Plasma LensHairapetian et al., PRL 72, 2403 (1994)
Focusing of a 5 MeV electron beam by a factor of two using an overdense plasma lens
Time dependent focusing demonstrated
UCLA
In-house Experimental Program on Plasma Acceleration: Highlights
(II)
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Raman Forward Scattering shown to be capable of accelerating electrons
nC of charge, self-trapped and accelerated in a gas jet experiment
Self Modulated LWFAModena et. al., Nature 377, 606 (1995)
Relativistic guiding of a 20 TW laser over 20 Rayleigh lengths shown
A relativistic plasma wave was shown to reside inside the self- guided channel
Relativistic GuidingClayton et. al., PRL 81, 100 (1998)
2.
UCLA
In-house Experimental Program on
Plasma Acceleration: Highlights (III)
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35A12A
Greater than 100 MeV energy gain in plasmas seen for the first time
Energy gain greater than linear dephasing limit
Breaking the 100 MeV barrierGordon et al., PRL 80, 2133 (1998)
Second generation Plasma Beat Wave Accelerator experiment in Neptune shows injected 12 MeV particles gaining energy out to 50 MeV
Second Generation PBWA Expts Tochitsky et al., PRL 92, 095004 (2004)
2.
UCLA
UCLA Program at SLAC: UCLA/USC/SLAC Collaboration
1. 15 GeV acceleration in 30 cm plasma (Length Scaling of Energy Gain)
2. E164X breaks GeV barrier, Hogan et al., PRL 95, 054802 (2005)
3. Matched beam propagation leads to first acceleration, Muggli et al., PRL 93, 014802 (2004)
4. Positron acceleration by plasma, Blue et al., PRL 90, 214801 (2003)
5. Positron focusing of plasma column, Hogan et al., PRL 90, 205002 (2003)
6. Betatron x-ray emission using plasma, Wang et al., PRL 88, 135004 (2002)
7. Plasma as a thick focusing optic, Clayton et al., PRL 88, 154801 (2002)
8. Refraction of Electron Beam, Muggli et al., Nature 411, 43 (2001)
Talk by R. Siemann at this meeting
3.
UCLA
MASSIVELY PARALLEL COMPUTATIONS IN AID OF PLASMA ACCELERATION RESEARCH
afterburner
hosing
E164X
OSIRIS: (Full PIC)
• Moving window, parallel
• Dynamic load balancing
• Field and Impact Ionization
• Successfully applied to full 3D modeling of LWFA and PWFA experimentsQuickPIC:
• Highly efficient quasi-static model for beam- driven plasma accelerators
• Fully parallel with dynamic load balancing
• Ponderomotive guiding center + envelope models for laser driven
• ADK model for field ionization
• At least100x faster than full PIC
4.
UCLA
PH.D STUDENTS TRAINED IN PAST FIVE YEARS
• Brian Duda, 2000 Mori• Shuoqin Wang, 2002 Joshi• Brent Blue, 2003 Joshi• Catalin Filip, 2003 Joshi• Ritesh Narang, 2003 Joshi• Chengkun Huang, 2005 Mori
Advisor:
Over 25 Ph.Ds granted since group’s inception.Faculty placed at USC, UCLA, U. Michigan/Nebraska, Florida A&M, CalState, U. Osaka
5 Student Awards including two Best Ph.D. Thesis Awards
5.
UCLA
Advanced Accelerator Physics at UCLA Physics & Astronomy:
Cline Group The Cline group was the first experimental
advanced accelerator group in the UCLA Physics Dept., formed initially at U. Wisconsin
Members of the group: D. Cline, A. Garren, Y. Fukui, K. Lee, F. Zhou, X. Yang, L. Shao (PhD Student) and undergraduate students at UCLA
Key collaborators: H. Kirk (BNL), M. Ross (SLAC) W. Kimura (STI), V. Yakimenko, I. Pogorelsky (BNL/ATF), Y. Ho and Q. Kang (Fudon University)
Muon Collider Collaborators: ILC University Research Program, ATF/BNL Faculty
Goals of team:
(1) Training of PhD students and postdoctoral people
(2) The study and design of beam cooling and muon colliders/neutrino factories
(3) Development of beam monitors for the ILC
(4) Advanced accelerator concepts at the BNL ATF
UCLA
Activities of the Cline Advanced Accelerator Team
(1) Training of PhD Students This group has trained 15 PhD or MS students. Pre-history at Univ. Wisconsin included D. Larson, J. Rosenzweig, X. Wang; more recently P. He has joined BNL staff (2) Muon Collider/Neutrino Factory The modern development of the muon collider was started by this group in 1992 with a meeting in Napa, California. During the 1990s we held five key conferences and muon collider collaboration meetings. Current work:
- The fiber tracker for MICE cooling experiments - The study of various ring coolers for muon colliders - The design of a special muon collider to study Higgs bosons that could be discovered at the LHC (A, H Higgs)
UCLARing Coolers and Muon Colliders/Higgs Factories
David B. Cline
Center for Advanced Accelerators, Department of Physics & Astronomy, University of California, Los Angeles, CA 90095 USA
We describe the progress in the simulation of 6D cooling of beams for use in neutrino factories and muon beam colliders. We concentrate on the final cooling needed to reach the emmittance required for a SUSY Higgs factory using high-pressure gas ring coolers and Li lens ring coolers.
Figure 1. Recent concept for a +- collider Higgs factory.
UCLADemonstration of High-Trapping Efficiency and Narrow Energy Spread
in a Laser-Driven Accelerator
W.D. Kimura, et al., Physical Review Letters, 2003 Laser-driven electron accelerators (laser linacs) offer the potential for enabling much more economical and compact devices. However, the development of practical and efficient laser linacs requires accelerating a large ensemble of electons together (“trapping”) while keeping their energy spread small. This has never been realized before for any laser acceleration system. We present here the first demonstration of a high-trapping efficiency and narrow energy spread via laser acceleration. Trapping efficiencies of up to 80% and energy spreads down to 0.36% (1) were demonstrated.
Laser acceleration at BNL ATF
Staging, low energy spread demonstrated
UCLA
Next generation advanced accelerator scheme: Vacuum laser acceleration
UCLA
ODR (Optical Diffraction Radiation) Beam Size Detector at SLAC FFTB
Experiment in support of ILC diagnostic development
Rosenzweig-Pellegrini Group:the Particle Beam Physics Lab
(PBPL)
Rosenzweig-Pellegrini Group:the Particle Beam Physics Lab
(PBPL)Group built upon three research thrusts
Strong connections between all areasCommon themes: multi-disciplinary, high energy density (relativistic) interactions, ultra-fast systems
Basic beam physics and technology underpins other two areas
Group built upon three research thrusts
Strong connections between all areasCommon themes: multi-disciplinary, high energy density (relativistic) interactions, ultra-fast systems
Basic beam physics and technology underpins other two areas
Advanced acceleratorsAdvanced
acceleratorsAdvanced
light sourcesAdvanced
light sources
High brightness electron beamsHigh brightness electron beams
Basic theoryBasic theory Simulation and advanced computing
Simulation and advanced computing
Cutting-edge experimentsCutting-edge experiments
Advanced technologyAdvanced technology
Aspects of Research Program
Aspects of Research Program
Scientific disciplines touched upon include:Beam-plasma interaction; beam material interaction
Collective beam effects, nonlinear beam dynamics
Beam-radiation interaction; instabilities Device physics: high power microwaves, lasers, THz
Ultra-fast measurements
Scientific disciplines touched upon include:Beam-plasma interaction; beam material interaction
Collective beam effects, nonlinear beam dynamics
Beam-radiation interaction; instabilities Device physics: high power microwaves, lasers, THz
Ultra-fast measurements
Education
Group statisticsGroup statisticsPopulation
Faculty: 2 (new hires coming)Profession researchers: 2Technical staff: 5Graduate students: 7Undergraduates: 4-6
Financial support (must be diverse!)DoE HEP: ~780k$/yr (70% Neptune, 30% off-campus)
Other: ~650k$/yrDoE BES+LCLS; NSF; LLNL/UC; foreign partners, industrial partners
PopulationFaculty: 2 (new hires coming)Profession researchers: 2Technical staff: 5Graduate students: 7Undergraduates: 4-6
Financial support (must be diverse!)DoE HEP: ~780k$/yr (70% Neptune, 30% off-campus)
Other: ~650k$/yrDoE BES+LCLS; NSF; LLNL/UC; foreign partners, industrial partners
UCLA PBPL collaborators
UCLA PBPL collaborators
UCLA EE dept. PBWA; high brightness beam studies, sub-ps beams; IFEL
acceleration; laser-structure acceleration SLAC
ORION/E163; LCLS & FEL physics; RF techniques BNL ATF
fsec compression, CSR; FEL physics; RF gun development FNAL (recently inactive)
A0/TESLA injector; Plasma wakefield and lens experiments LLNL
Inverse Compton scattering; basic beam physics, velocity bunching, micro-focusing
INFN/Roma/Frascati/Milano Electron sources; beam dynamics; ultra-fast measurements
Past collab.: LANL, ANL AWA, Tel Aviv Univ.
UCLA EE dept. PBWA; high brightness beam studies, sub-ps beams; IFEL
acceleration; laser-structure acceleration SLAC
ORION/E163; LCLS & FEL physics; RF techniques BNL ATF
fsec compression, CSR; FEL physics; RF gun development FNAL (recently inactive)
A0/TESLA injector; Plasma wakefield and lens experiments LLNL
Inverse Compton scattering; basic beam physics, velocity bunching, micro-focusing
INFN/Roma/Frascati/Milano Electron sources; beam dynamics; ultra-fast measurements
Past collab.: LANL, ANL AWA, Tel Aviv Univ.
Students are exposed to national lab and university collaborators throughout education
Two way pipeline for sharing expertise; one-way pipeline for future employment
PBPL Experimental Facilities
PBPL Experimental Facilities
State-of-the-art accelerator/laser labsNeptune Advanced Accelerator Lab
MARS 2-frequency TW CO2 laser (Joshi)Cutting edge photoinjector complex
PEGASUS Radiation LabOff-campus (PBPL aided in construction)
BNL ATFSLAC ORION & FFTBLLNL PLEIADES/FINDERINFN/LNF SPARC
State-of-the-art accelerator/laser labsNeptune Advanced Accelerator Lab
MARS 2-frequency TW CO2 laser (Joshi)Cutting edge photoinjector complex
PEGASUS Radiation LabOff-campus (PBPL aided in construction)
BNL ATFSLAC ORION & FFTBLLNL PLEIADES/FINDERINFN/LNF SPARC
Pegasus lab at UCLA
EducationEducationGraduate course yearly: Physics 250 Introduction and special topics
Strong USPAS attendanceAlso involved as regular lecturers
Undergrad. course: Physics 150 Led to text Fundamentals of Beam Physics (Oxford, 2003)
Unified treatment of charged particle and laser beams
Research! Most projects student-centeredHands-on; all aspects of researchThesis projects aimed a PRL level>90 refereed publications (>70 PR)
Graduate course yearly: Physics 250 Introduction and special topics
Strong USPAS attendanceAlso involved as regular lecturers
Undergrad. course: Physics 150 Led to text Fundamentals of Beam Physics (Oxford, 2003)
Unified treatment of charged particle and laser beams
Research! Most projects student-centeredHands-on; all aspects of researchThesis projects aimed a PRL level>90 refereed publications (>70 PR)
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PBPL graduates now spread throughout accelerator
community
PBPL graduates now spread throughout accelerator
community David Robin (CP). Accelerator Physics Group Leader at ALS Spencer Hartman (CP). Director, Raytheon microwave defense Gil Travish (JR). UCLA PBPL, associate researcher Andrei Terebilo (CP). SSRL scientist, SPEAR 3 Nick Barov (JR). Far-Tech, SBIR accelerator technology firm Mark Hogan (CP). SLAC ARDB scientist Eric Colby (JR). Panofsky Fellow, SLAC ARDB scientist Aaron Tremaine (JR). LLNL scientist, PLEIADES Compton source Xiadong Ding (CP). Titan, medical linacs Scott Anderson (JR). LLNL scientist, PLEIADES Compton source Alex Murokh (JR). RadiaBeam, SBIR accelerator technology firm Pietro Musumeci (CP). Univ. Roma, SPARC FEL project Matthew Thompson (JR). LLNL post-doc, advanced accelerators/X-rays Kip Bishofberger (JR). LANL post-doc, high brightness beams
2006: Joel England (JR), Gerard Andonian (JR), Jay Lim (JR) PBPL post-docs: SLAC/ANL/LLNL (5), Industry (1) Univ. (3) , Foreign (1)
David Robin (CP). Accelerator Physics Group Leader at ALS Spencer Hartman (CP). Director, Raytheon microwave defense Gil Travish (JR). UCLA PBPL, associate researcher Andrei Terebilo (CP). SSRL scientist, SPEAR 3 Nick Barov (JR). Far-Tech, SBIR accelerator technology firm Mark Hogan (CP). SLAC ARDB scientist Eric Colby (JR). Panofsky Fellow, SLAC ARDB scientist Aaron Tremaine (JR). LLNL scientist, PLEIADES Compton source Xiadong Ding (CP). Titan, medical linacs Scott Anderson (JR). LLNL scientist, PLEIADES Compton source Alex Murokh (JR). RadiaBeam, SBIR accelerator technology firm Pietro Musumeci (CP). Univ. Roma, SPARC FEL project Matthew Thompson (JR). LLNL post-doc, advanced accelerators/X-rays Kip Bishofberger (JR). LANL post-doc, high brightness beams
2006: Joel England (JR), Gerard Andonian (JR), Jay Lim (JR) PBPL post-docs: SLAC/ANL/LLNL (5), Industry (1) Univ. (3) , Foreign (1)
“Backbone” of PBPL research: advanced
technology
“Backbone” of PBPL research: advanced
technologyConnects advanced accelerators to conventional community
Designed and built in-houseDesign codes (students, engineers)World-class shop
RF structures1.6 cell RF photocathode gunAdvanced RF accelerating structuresRF deflector for fs beam measurements
Magnetic devicesLinear, nonlinear beam optics, bendsPermanent magnet undulators, quads
Connects advanced accelerators to conventional community
Designed and built in-houseDesign codes (students, engineers)World-class shop
RF structures1.6 cell RF photocathode gunAdvanced RF accelerating structuresRF deflector for fs beam measurements
Magnetic devicesLinear, nonlinear beam optics, bendsPermanent magnet undulators, quads
BNL/SLAC/UCLA 1.6 cell RF gun (>10 made, still improving)Plane wave transformer injector
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Hybrid traveling wave/standing wave photoinjector
World’s record strength (560 T/m)
permanent magnet quadrupole
Diverse theoretical contributions
Diverse theoretical contributions
Space-charge dominated beamsEmittance compensation, chicane pulse compression, velocity bunching
Plasma wakefieldsBlowout regime, matching, ion collapse
FEL, Compton scatteringSASE, spiking, QFEL, TW undulator
Radiative effects in beamsCSR, CTR microbunching, diamag. fields
Dielectric accelerating structuresSlab symmetric laser-excitation, ultra-high field wakes
Space-charge dominated beamsEmittance compensation, chicane pulse compression, velocity bunching
Plasma wakefieldsBlowout regime, matching, ion collapse
FEL, Compton scatteringSASE, spiking, QFEL, TW undulator
Radiative effects in beamsCSR, CTR microbunching, diamag. fields
Dielectric accelerating structuresSlab symmetric laser-excitation, ultra-high field wakes
Ion collapse in PWFA afterburner scenarioJ.B. Rosenzweig, et al., PRL95, 195002 (2005)
Recent Experimental Results I: Neptune
IFEL
Recent Experimental Results I: Neptune
IFEL0.5 TW 10 m laserHighest recorded IFEL acceleration15 MeV beam accelerated to over 35 MeV in 25 cm
First observation of higher harmonic IFEL interaction
0.5 TW 10 m laserHighest recorded IFEL acceleration15 MeV beam accelerated to over 35 MeV in 25 cm
First observation of higher harmonic IFEL interaction
Energy analysis of Neptune IFEL experiment
P. Musumeci, et al., Phys. Rev. Lett. 94, 154801 (2005)
Recent Experimental Results II: Compton scattering @ LLNLRecent Experimental Results
II: Compton scattering @ LLNLApplications to:
Polarized positron collider
300 fs beams from velocity bunching
Focusing from PMQ ultra-strong final focus
Ultra-high peak brightness X-rays used in diffraction studies
Next stage (nonlinear Compton) at Neptune
Applications to:Polarized positron collider
300 fs beams from velocity bunching
Focusing from PMQ ultra-strong final focus
Ultra-high peak brightness X-rays used in diffraction studies
Next stage (nonlinear Compton) at Neptune
PMQ final focus system;15 micron beam image
Computed and measured Ta K-edge diffraction pattern at PLEIADESD. J. Gibson, et al.,, Phys. Plasmas, 11 2857 (2004)
Recent Experimental Results III: beam-plasma interactionRecent Experimental Results III: beam-plasma interaction
Experiments at FNAL A0 lab
Beam ~stopped in PWFA blowout expt 12 MeV in 8 cm
Underdense plasma lens (nb>np)Very low aberrationAsymmetric beams (LC scenario)
Experiments at FNAL A0 lab
Beam ~stopped in PWFA blowout expt 12 MeV in 8 cm
Underdense plasma lens (nb>np)Very low aberrationAsymmetric beams (LC scenario)
Spectrometer images (150 MV/m case)
Round beam, flat beam underdense plasma lens images
Recent Experimental Results IV: Compression and Coherent RadiationRecent Experimental Results IV:
Compression and Coherent Radiation 13 MeV experiments at Neptunetransverse phase space bifurcation
Velocity field dominant70 MeV BNL ATF expts now underway<100 fs beamsCoherent “edge” radiation
Phase space distortions from acceleration fields
13 MeV experiments at Neptunetransverse phase space bifurcation
Velocity field dominant70 MeV BNL ATF expts now underway<100 fs beamsCoherent “edge” radiation
Phase space distortions from acceleration fields
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Neptune slit-based phase space measurement; uncompressed and compressed beam
CERCTR
ATF/UCLA compressor CER energy v. RF phase
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CTR autocorrelation of bunch length
S.G. Anderson, et al., Phys. Rev. Lett., 91, 074803 (2003).
Recent Experimental Results V: Ultra-broad spectrum
SASE FEL
Recent Experimental Results V: Ultra-broad spectrum
SASE FELBandwidth of up to 15% observed at high gain
Start-to-end simulations give details of microscopic physics
Red-shifting of off-axis modes dominant
Bandwidth of up to 15% observed at high gain
Start-to-end simulations give details of microscopic physics
Red-shifting of off-axis modes dominant
Ultra-wide measured bandwidth at VISA II
Output of start-to-end simulations of VISA II
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Measurement of double-differential spectrum
G. Andonian, et al., Phys. Rev Lett. 95, 054801 (2005)
Recent Experimental Results VI: High Gradient Dielectric Wakes
Recent Experimental Results VI: High Gradient Dielectric Wakes
FFTB ultra-short beam, 100 m aperture tube: over 10 GV/m
Initial run gave breakdown threshold 4 GV/m surface field 2 GV/m
Damage post-mortem ongoing
FFTB ultra-short beam, 100 m aperture tube: over 10 GV/m
Initial run gave breakdown threshold 4 GV/m surface field 2 GV/m
Damage post-mortem ongoingEz from OOPIC simulation of hollow dielectric tube (OOPIC)
Ez lineout on-axis
0.0000 0.0004 0.0008 0.0012 0.0016 0.0020 0.00240.000000
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r (m
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-1.255E10
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-7.560E9
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2.420E9
4.915E9
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r (m
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-1.255E10
-1.006E10
-7.560E9
-5.065E9
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-7.500E7
2.420E9
4.915E9
7.410E9
9.905E9
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Ez
0.0014 0.0016 0.0018 0.0020 0.0022
-1.20E+010
-9.00E+009
-6.00E+009
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0.00E+000
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0.0014 0.0016 0.0018 0.0020 0.0022
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Ez
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Z (m)
View end of dielectric tube; frames sorted by increasing peak currentView end of dielectric tube; frames sorted by increasing peak current
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ConclusionsConclusionsUCLA represents a major resource in the national accelerator R&D programValued collaborator with nat’l labs
Leadership in Advanced concepts, ideas for futureComputational physicsTechnologiesExperimentsEducation - development of future leaders
Synergy between beams, HEP, light sourcesHands on and multi-disciplinary program is very attractive to students
Let’s keep going!
UCLA represents a major resource in the national accelerator R&D programValued collaborator with nat’l labs
Leadership in Advanced concepts, ideas for futureComputational physicsTechnologiesExperimentsEducation - development of future leaders
Synergy between beams, HEP, light sourcesHands on and multi-disciplinary program is very attractive to students
Let’s keep going!