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Proceedings Paper

Fabrication of three-dimensionally structured plasma waveguide and application to induction of electron injection and betatron oscillation in a laser wakefield electron accelerator
Author(s): Y.-C. Ho; T.-S. Hung; J.-G. Jhou; H. Qayyum; W.-H. Chen; H.-H. Chu; J.-Y. Lin; J. Wang; S.-Y. Chen
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Paper Abstract

By adding a transverse heater pulse with controlled intensity distribution into the axicon ignitor-heater scheme for optically producing a plasma waveguide, three-dimensionally structured plasma waveguide can be fabricated. The additional heater pulse generates further heating of the plasma filament produced by the axicon pulses in a spatially and temporally controlled manner. The succeeding evolution of the plasma leads to a properly structured plasma waveguide that suits for targeted application. With this technique, induction of electron injection in a plasma-waveguide-based laser wakefield accelerator was achieved and resulted in production of a quasi-monoenergetic electron beam with an electron energy reaching 280 MeV and an energy spread as low as 1% in a 4-mm-long gas jet by properly setting the transverse heater pulse delay with respect to the axicon pulses. Furthermore, strong hard X-ray beam was observed upon further increase of transverse heater delay so that the irradiated section in the plasma waveguide acts as a plasma kicker to enhance betatron oscillation.

Paper Details

Date Published: 7 May 2013
PDF: 10 pages
Proc. SPIE 8779, Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III, 877906 (7 May 2013); doi: 10.1117/12.2017195
Show Author Affiliations
Y.-C. Ho, National Central Univ. (Taiwan)
Academia Sinica (Taiwan)
T.-S. Hung, National Central Univ. (Taiwan)
Academia Sinica (Taiwan)
J.-G. Jhou, Academia Sinica (Taiwan)
National Taiwan Univ. (Taiwan)
H. Qayyum, National Central Univ. (Taiwan)
Academia Sinica (Taiwan)
W.-H. Chen, National Central Univ. (Taiwan)
Academia Sinica (Taiwan)
H.-H. Chu, National Central Univ. (Taiwan)
J.-Y. Lin, National Chung Cheng Univ. (Taiwan)
J. Wang, National Central Univ. (Taiwan)
Academia Sinica (Taiwan)
National Taiwan Univ. (Taiwan)
S.-Y. Chen, National Central Univ. (Taiwan)
Academia Sinica (Taiwan)


Published in SPIE Proceedings Vol. 8779:
Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III
Eric Esarey; Dino A. Jaroszynski; Carl B. Schroeder; Wim P. Leemans; Kenneth W. D. Ledingham, Editor(s)

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