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Title: Preliminary Simulations of Plasma Wakefield Accelerator Experiments at FACET

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1293678
Report Number(s):
SLAC-PUB-16684
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Journal Name: Conf.Proc.C110328:136-138,2011; Conference: Particle Accelerator, 24th Conference (PAC'11) 28 Mar - 1 Apr 2011, New York, USA
Country of Publication:
United States
Language:
English
Subject:
Accelerators,ACCPHY

Citation Formats

An, Weiming, Lu, Wei, Joshi, Chan, Mori, Warren B., /UCLA, Huang, Chengkun, /Los Alamos, Hogan, Mark, and /SLAC. Preliminary Simulations of Plasma Wakefield Accelerator Experiments at FACET. United States: N. p., 2016. Web.
An, Weiming, Lu, Wei, Joshi, Chan, Mori, Warren B., /UCLA, Huang, Chengkun, /Los Alamos, Hogan, Mark, & /SLAC. Preliminary Simulations of Plasma Wakefield Accelerator Experiments at FACET. United States.
An, Weiming, Lu, Wei, Joshi, Chan, Mori, Warren B., /UCLA, Huang, Chengkun, /Los Alamos, Hogan, Mark, and /SLAC. 2016. "Preliminary Simulations of Plasma Wakefield Accelerator Experiments at FACET". United States. doi:. https://www.osti.gov/servlets/purl/1293678.
@article{osti_1293678,
title = {Preliminary Simulations of Plasma Wakefield Accelerator Experiments at FACET},
author = {An, Weiming and Lu, Wei and Joshi, Chan and Mori, Warren B. and /UCLA and Huang, Chengkun and /Los Alamos and Hogan, Mark and /SLAC},
abstractNote = {},
doi = {},
journal = {Conf.Proc.C110328:136-138,2011},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 8
}

Conference:
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  • Simulation results of possible upcoming Plasma Wakefield Accelerator (PWFA) experiments at FACET are presented. In a two-bunch scenario, the second (accelerated) electron bunch can have multi-GeV energy gain and a small energy spread after less than 1 meter of propagation in a Cs plasma column.
  • FACET, the Facility for Advanced Accelerator and Experimental Tests, is a new facility being constructed in sector 20 of the SLAC linac primarily to study beam driven plasma wakefield acceleration beginning in summer 2011. The nominal FACET parameters are 23GeV, 3nC electron bunches compressed to {approx}20{micro}m long and focused to {approx}10{micro}m wide. The intense fields of the FACET bunches will be used to field ionize neutral lithium or cesium vapor produced in a heat pipe oven. Previous experiments at the SLAC FFTB facility demonstrated 50GeV/m gradients in an 85cm field ionized lithium plasma where the interaction distance was limited bymore » head erosion. Simulations indicate the lower ionization potential of cesium will decrease the rate of head erosion and increase single stage performance. The initial experimental program will compare the performance of lithium and cesium plasma sources with single and double bunches. Later experiments will investigate improved performance with a pre-ionized cesium plasma. The status of the experiments and expected performance are reviewed. The FACET Facility is being constructed in sector 20 of the SLAC linac primarily to study beam driven plasma wakefield acceleration. The facility will begin commissioning in summer 2011 and conduct an experimental program over the coming five years to study electron and positron beam driven plasma acceleration with strong wake loading in the non-linear regime. The FACET experiments aim to demonstrate high-gradient acceleration of electron and positron beams with high efficiency and negligible emittance growth.« less
  • We report initial results of the Plasma Wakefield Acceleration (PWFA) Experiments performed at FACET - Facility for Advanced aCcelertor Experimental Tests at SLAC National Accelerator Laboratory. At FACET a 23 GeV electron beam with 1.8 x 10{sup 10} electrons is compressed to 20 {mu}m longitudinally and focused down to 10 {mu}m x 10 {mu}m transverse spot size for user driven experiments. Construction of the FACET facility completed in May 2011 with a first run of user assisted commissioning throughout the summer. The first PWFA experiments will use single electron bunches combined with a high density lithium plasma to produce acceleratingmore » gradients > 10 GeV/m benchmarking the FACET beam and the newly installed experimental hardware. Future plans for further study of plasma wakefield acceleration will be reviewed. The experimental hardware and operation of the plasma heat-pipe oven have been successfully commissioned. Plasma wakefield acceleration was not observed because the electron bunch density was insufficient to ionize the lithium vapor. The remaining commissioning time in summer 2011 will be dedicated to delivering the FACET design parameters for the experimental programs which will begin in early 2012. PWFA experiments require the shorter bunches and smaller transverse sizes to create the plasma and drive large amplitude wakefields. Low emittance and high energy will minimize head erosion which was found to be a limiting factor in acceleration distance and energy gain. We will run the PWFA experiments with the design single bunch conditions in early 2012. Future PWFA experiments at FACET are discussed in [5][6] and include drive and witness bunch production for high energy beam manipulation, ramped bunch to optimize tranformer ratio, field-ionized cesium plasma, preionized plasmas, positron acceleration, etc.. We will install a notch collimator for two-bunch operation as well as new beam diagnostics such as the X-band TCAV [7] to resolve the two bunches. With these new instruments and desired beam parameters in place next year, we will be able to complete the studies of plasma wakefield acceleration in the next few years.« less