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Laser plasma accelerator driven by a super-Gaussian pulse

Published online by Cambridge University Press:  12 April 2012

TOBIAS OSTERMAYR,
STEFAN PETROVICS,
KHALID IQBAL,
CONSTANTIN KLIER,
HARTMUT RUHL,
KAZUHISA NAKAJIMA,
AIHUA DENG,
XIAOMEI ZHANG,
BAIFEI SHEN and
JIANSHENG LIU
...Show all authors
TOBIAS OSTERMAYR
Affiliation:
Ludwig-Maximilians-Universität München, 85748 Garching, Germany (tobias.ostermayr@physik.uni-muenchen.de)
STEFAN PETROVICS
Affiliation:
Ludwig-Maximilians-Universität München, 85748 Garching, Germany (tobias.ostermayr@physik.uni-muenchen.de)
KHALID IQBAL
Affiliation:
Ludwig-Maximilians-Universität München, 85748 Garching, Germany (tobias.ostermayr@physik.uni-muenchen.de)
CONSTANTIN KLIER
Affiliation:
Ludwig-Maximilians-Universität München, 85748 Garching, Germany (tobias.ostermayr@physik.uni-muenchen.de)
HARTMUT RUHL
Affiliation:
Ludwig-Maximilians-Universität München, 85748 Garching, Germany (tobias.ostermayr@physik.uni-muenchen.de)
KAZUHISA NAKAJIMA
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaHigh Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0081, JapanShanghai Jiao Tong University, Shanghai 200240, China
AIHUA DENG
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
XIAOMEI ZHANG
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
BAIFEI SHEN
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
JIANSHENG LIU
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
RUXIN LI
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
ZHIZHAN XU
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
TOSHIKI TAJIMA
Affiliation:
Ludwig-Maximilians-Universität München, 85748 Garching, Germany (tobias.ostermayr@physik.uni-muenchen.de)Max-Planck-Institut für Quantenoptik, Garching 85748, Germany
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Abstract

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A laser wakefield accelerator (LWFA) with a weak focusing force is considered to seek improved beam quality in LWFA. We employ super-Gaussian laser pulses to generate the wakefield and study the behavior of the electron beam dynamics and synchrotron radiation arising from the transverse betatron oscillations through analysis and computation. We note that the super-Gaussian wakefields radically reduce the betatron oscillations and make the electron orbits mainly ballistic over a single stage. This feature permits to obtain small emittance and thus high luminosity, while still benefitting from the low-density operation of LWFA (Nakajima et al. 2011 Phys. Rev. ST Accel. Beams14, 091301), such as the reduced radiation loss, less number of stages, less beam instabilities, and less required wall plug power than in higher density regimes.

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