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Control of Laser Ablation Plasma with Longitudinal Magnetic Field

Shunsuke IKEDA, Mitsuo NAKAJIMA and Kazuhiko HORIOKA

Department of Energy Sciences, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midoriku, Yokohama 226-8502, Japan

(Received 25 January 2012 / Accepted 31 January 2012 / Published 15 March 2012)

Abstract

We investigated the interaction of a laser ablation plasma with a longitudinal magnetic field, intending to create a directional moving plasma for laser ion source. To study the plasma dynamics, time-of-flight measurements of ion flux were made as a function of laser intensity and the magnetic field. The results indicate that the ion current density in the forward direction is strongly affected by a moderate (∼0.2 T) magnetic field. Results also indicate that the longitudinal magnetic field can control the ion flux as well as degree of ionization of the moving plasma by reducing the transverse expansion and setting on the recombination process during the interaction.

Copyright (c) 2012 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

laser-produced plasma, longitudinal magnetic field, transverse motion, directional plasma, recombination

DOI: 10.1585/pfr.7.1201015

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This paper may be cited as follows:

Shunsuke IKEDA, Mitsuo NAKAJIMA and Kazuhiko HORIOKA, Plasma Fusion Res. 7, 1201015 (2012).