Fabrication of three-dimensionally structured plasma waveguide and application to induction of electron injection and betatron oscillation in a laser wakefield electron accelerator

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

doi:10.1117/12.2017195

7 May 2013 Fabrication of three-dimensionally structured plasma waveguide and application to induction of electron injection and betatron oscillation in a laser wakefield electron accelerator

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

Author Affiliations +

Proceedings Volume 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 (2013) https://doi.org/10.1117/12.2017195
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

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.

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Y.-C. Ho, T.-S. Hung, J.-G. Jhou, H. Qayyum, W.-H. Chen, H.-H. Chu, J.-Y. Lin, J. Wang, and S.-Y. Chen "Fabrication of three-dimensionally structured plasma waveguide and application to induction of electron injection and betatron oscillation in a laser wakefield electron accelerator", 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); https://doi.org/10.1117/12.2017195

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KEYWORDS

Plasma

Waveguides

Axicons

X-rays

Electron beams

Modulation

Chemical species

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