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Intense negative hydrogen ion production in high-power diodes

Published online by Cambridge University Press:  09 March 2009

V. A. Papadichev
V. A. Papadichev
Affiliation:
P. N. Lebedev Physical Institute, Leninsky Prospect 53, Moscow 117924, USSR
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Abstract

Some peculiarities of using negative ions for accelerators and CTR are examined. Highpower beams of fast atoms obtained by charge exchange of negative ions can have advantages over positive ion beams for inertial confinement fusion (ICF) since they do not experience any deviations, instabilities, and scattering. H− current up to 7 kA in a 100–200 ns pulse with densities up to 200 Å/cm2 and a voltage of 0.8 MV were obtained in experiments on magnetically insulated diodes at the Lebedev Physical Institute. Diagnostics of high-power H− beams are described. Experimental results on cathode plasma formation by surface discharge on a dielectric initiated by a bipolar prepulse or by laser illumination are presented. The dependence of H− yield on cathode current was determined and experiments on plasma stabilization are described. It is concluded that 1 kÅ/cm2 of H− can be obtained.

Type
Regular Papers
Information
Laser and Particle Beams , Volume 9 , Issue 1 , March 1991 , pp. 167 - 189
Copyright
Copyright © Cambridge University Press 1991

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