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Kazuhisa Nakajima
초강력 레이저과학 연구단
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Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching

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Title
Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching
Author(s)
Zhang Z.; Li W.; Liu J.; Wang W.; Yu C.; Tian Y.; Kazuhisa Nakajima; Deng A.; Qi R.; Wang C.; Qin Z.; Fang M.; Liu J.; Xia C.; Li R.; Xu Z.
Publication Date
2016-05
Journal
PHYSICS OF PLASMAS, v.23, no.5, pp.053106 -
Publisher
AMER INST PHYSICS
Abstract
We propose a scheme to minimize the energy spread of an electron beam (e-beam) in a cascaded laser wakefield accelerator to the one-thousandth-level by inserting a stage to compress its longitudinal spatial distribution. In this scheme, three-segment plasma stages are designed for electron injection, e-beam length compression, and e-beam acceleration, respectively. The trapped e-beam in the injection stage is transferred to the zero-phase region at the center of one wakefield period in the compression stage where the length of the e-beam can be greatly shortened owing to the velocity bunching. After being seeded into the third stage for acceleration, the e-beam can be accelerated to a much higher energy before its energy chirp is compensated owing to the shortened e-beam length. A one-dimensional theory and two-dimensional particle-in-cell simulations have demonstrated this scheme and an e-beam with 0.2% rms energy spread and low transverse emittance could be generated without loss of charge. © 2016 Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/2527
ISSN
1070-664X
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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