Progress with Laser Plasma Acceleration and Prospects of LPA
HEP Colliders Wim Leemans LOASIS Program and BELLA Team APS-DPF
Meeting August 12, 2011 http://loasis.lbl.gov/ Lawrence Berkeley
National Laboratory UC Berkeley
Slide 2
2 SLAC 50 GeV 7 TeV LHC Accelerators: drivers for science
DNADNA 2 GeV X-rays
Slide 3
Laser plasma acceleration enables development of compact
accelerators 3 m-scale 100 micron-scale 10 40 MV/m 10 100 GV/m
Plasmas sustain extreme fields => compact accelerators Can this
technology be developed for energy frontier machines, light
sources, medical or homeland security applications? W=E z x L
Slide 4
Wish list for an e + - e - TeV collider... Energy = O(1 TeV,
c.m.) Length = O(soccer field) E z = O(10 GV/m) Luminosity > 10
34 cm -2 s -1 Cost = Affordable Beam power, beam quality Wall plug
efficiency, technology choice
Slide 5
Slide 6
Key technical challenges for Laser Plasma Accelerators
Multi-GeV beams Lasers: high average power Modeling High quality
beams laser Staging, optimized structures 10-100 TW
Diagnostics/Radiation sources PW-class BELLA
Slide 7
7 Channel guided laser plasma accelerators have produced up to
GeV beams from cm-scale structures C. G. R. Geddes,et al,
Nature,431, p538 (2004) S. Mangles et al., Nature 431, p535 (2004)
J. Faure et al., Nature 431, p541 (2004) 2004 result: 10 TW laser,
mm-scale plasma 2006 result: 40 TW laser, cm-scale plasma W.P.
Leemans et. al, Nature Physics 2, p696 (2006) K. Nakamura et al.,
Phys. Plasmas 14, 056708 (2007) 1.1 GeV
Laser plasma accelerator (today) Collider (>20 yrs)
Lightsource (10 yrs) Security Apps (5-10 yrs) Medical (10 yrs)
Laser development
Slide 25
25 1 TeV case: 420 kW/laser, 13 kHz (32 J/pulse) with 30% wall
plug efficiency and we need 100 of them
Slide 26
26 Laser technology: key component for sustained progress How
to reach laser average power levels needed for science apps?
Develop roadmap for science and technology to develop next
generation lasers: Important for accelerators (see Accelerators for
Americas Future document) Unique differences between lasers for
defense and for science Will require major research investment at
National Labs, Universities and Industry with potential for
international collaborations ICFA-ICUIL Joint Taskforce for roadmap
development
Slide 27
27 Novel lasers and materials are being developed Amplifiers -
Rods, slabs, discs and fibers Materials for amplifiers, mirrors and
compressor gratings - Ceramics and diamond - Nano-fabricated
structures Diodes and small quantum defect materials O(10 kW)
fibers (CW power) reality now!
Slide 28
28 Major investments - Example: European Extreme Light
Infrastructure - Four pillars (three funded at 790Meuro): 1.
attosecond and XUV science: Hungary 2. High-brightness x-ray and
particle sources: Czech Republic 3. Photo-nuclear science,
transmutation,...: Romania 4. Ultra-high intensity science (non-lin
QED): Russia ???
Slide 29
Slide 30
30 Conclusion Laser plasma accelerator science is vibrant - GeV
beam demonstrated with %-level energy spread - BELLA facility aims
at 10 GeV in 1 meter - FEL proof-of-principle experiments towards
Light Source Facility - Gamma-ray sources, medical and other
applications Collider is still far off but basic concepts are being
developed: - Operation in quasi-linear regime for e- and e+
acceleration - Transverse control of plasma profile for guiding
laser beam - Injection control and efficiency optimization: -
Longitudinal control of plasma profile - Laser mode control allows
emittance control - Low emittance observed -- FEL experiment will
be litmus test Laser technology must undergo revolution towards
high average power 30
Slide 31
Team, collaborators and funding Primary collaborators Postdocs
K. Nakamura (E) M. Chen (S) C. Benedetti (S+T) T. Sokollik (E)
Students M. Bakeman (PhD) -- graduated 2011 C. Lin (PhD) --
graduated 2011 R. Mittal (PhD) G. Plateau (PhD) -- graduating 2011
S. Shiraishi (PhD) D. Mittelberger (PhD) C. Koschitzki (PhD) B.
Shaw (PhD) L. Yu (PhD) Staff S. Bulanov (T, UCB) E. Esarey (T) C.
Geddes (S+E) A. Gonsalves (E) W. Leemans (E) N. Matlis (E) C.
Schroeder (T) C. Toth (E) J. van Tilborg (E) Eng/Techs R. Duarte Z.
Eisentraut A. Magana S. Fournier D. Munson K. Sihler D. Syversrud
N. Ybarrolaza LBNL: M. Battaglia, W. Byrne, J. Byrd, W. Fawley, K.
Robinson, D. Rodgers, R. Donahue, Al Smith, R. Ryne. TechX-Corp: J.
Cary, D. Bruhwiler, et al. SciDAC team Oxford Univ.: S. Hooker et
al. DESY/Hamburg: F. Gruener et al. GSI: T. Stoehlker, D. Thorn
Trieste: F. Parmigiani BELLA Team members S. Zimmermann J. Coyne D.
Lockhart G. Sanen S. Walker-Lam K. Barat
Slide 32
Collider power and efficiency requirements: well beyond current
state-of-the-art Beam power: P b = fNE cm N ~ 4x10 9 f ~ 15 kH z E
cm ~ 1 TeV P b ~ 4.8 MW Collider based on 10-GeV stages: ~32
J/laser at 15 kHz = ~480 kW average power laser/stage (100 stages)
Well beyond state-of-the-art for high peak power laser technology
Laser technology development required ~20% laser to beam efficiency
~30% wall-plug to laser efficiency Laser to plasma wave efficiency:
~50% Plasma wave to beam efficiency: ~40% 6% efficiency => AC
wall-plug power ~ 80 MW