Electron-beam instability in the slab-symmetric dielectric structure and stabilization assisted by pre-ionized plasma

Naotoshi Kirihara; Toshimitsu Nishino; Yasushi Nishida; Hiroaki Ito; Noboru Yugami

doi:10.1117/12.375151

11 January 2000 Electron-beam instability in the slab-symmetric dielectric structure and stabilization assisted by pre-ionized plasma

Naotoshi Kirihara, Toshimitsu Nishino, Yasushi Nishida, Hiroaki Ito, Noboru Yugami

Author Affiliations +

Proceedings Volume 3886, High-Power Lasers in Energy Engineering; (2000) https://doi.org/10.1117/12.375151
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

The V_p X B acceleration scheme with use of a transverse electromagnetic wave is demonstrated experimentally. However, in order to couple particles with the transverse wave, a slow-wave structure has to be employed because of low electron beam velocity. When the electron beam propagated through the slow-wave structure composed of dielectric-loaded slab-symmetric waveguide in the present paper, an orbit of the beam because unstable. We have observed the electron beam instability to investigate its mechanisms. As a result, an electron beam in the dielectric-loaded waveguide is deflected to the opposite direction from the material on the waveguide wall. By adding the beam-generated plasma in the slow-wave structure the electron beam has been observe dot become stable.

Citation Download Citation

Naotoshi Kirihara, Toshimitsu Nishino, Yasushi Nishida, Hiroaki Ito, and Noboru Yugami "Electron-beam instability in the slab-symmetric dielectric structure and stabilization assisted by pre-ionized plasma", Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); https://doi.org/10.1117/12.375151

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