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초강력 레이저과학 연구단
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Optical shaping of plasma cavity for controlled laser wakefield acceleration

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Title
Optical shaping of plasma cavity for controlled laser wakefield acceleration
Author(s)
Bobbili Sanyasi Rao; Myung Hoon Cho; Hyung Taek Kim; Jung Hun Shin; Kyung Hwan Oh; Jong Ho Jeon; Byung Ju Yoo; Seong Ha Cho; Jin Woo Yoon; Jae Hee Sung; Seong Ku Lee; Chang Hee Nam
Publication Date
2020-12
Journal
Physical Review Research, v.2, no.4, pp.1 - 7
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 authors.Laser wakefield accelerators rely on relativistically moving micrometer-sized plasma cavities that provide extremely high electric field >100 GV/m. Here, we demonstrate transverse shaping of the plasma cavity to produce controlled sub-GeV electron beams, adopting laser pulses with an axially rotatable ellipse-shaped focal spot. We showed the control capability on electron self-injection, charge, and transverse profile of the electron beam by rotating the focal spot. We observed that the effect of the elliptical focal spot was imprinted in the profiles of the electron beams and the electron energy increased, as compared to the case of a circular focal spot. We performed three-dimensional particle-in-cell simulations which reproduced the experimental results and revealed dynamics of an asymmetric self-injection process. This simple scheme offers a control method on laser wakefield acceleration to produce tailored electron beams and x rays for various applications.
URI
https://pr.ibs.re.kr/handle/8788114/10606
DOI
10.1103/PhysRevResearch.2.043319
ISSN
2643-1564
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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