Plasma and Fusion Research

Volume 11, 1206107 (2016)

Rapid Communications

Comparative Measurements of Ion and Electron Beams from Laser Ablation Plasma
Yasuo SAKAI, Tomonobu ITAGAKI and Kazuhiko HORIOKA
Department of Energy Sciences, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
(Received 5 July 2016 / Accepted 26 July 2016 / Published 16 September 2016)


A laser ablation plasma was characterized as a source for high-flux particle beams. The ablation plasma was biased systematically from positive to negative high voltages and the fluxes of charged particles through a pair of extraction electrodes were measured. The ratio of available flux of electrons to that of ions was around 10. The result means the ion extraction is basically provided by the flux of supersonically drifting plasma and the electron extraction is determined by the flux of co-moving electrons exceeding a reduced sheath potential at the extraction electrode.


laser ablation plasma, particle beam, plasma cathode, laser ion source, sheath

DOI: 10.1585/pfr.11.1206107


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