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Proceedings Paper

Plasma betatron without gas breakdown
Author(s): Hiroshi Ishizuka; K. Yee; Amnon Fisher; Norman Rostoker
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Paper Abstract

1407_49Following Budker's proposal, experiments on plasma betatrons were carried out in several laboratories. Large conduction currents were observed as a result of gas breakdown, but the current of energetic electrons did not exceed 10 (Alpha) . Plasma injection to start a beam in good vacuum has been adopted. The chamber consisted of outer and inner glass pipes lined with stainless steel mesh at radii of 5 cm and 2 cm, respectively. A toroidal field of 2-3 kG was applied along with a vertical field of up to 1.4 kG. Plasma was injected by coaxial guns, 1/4 inch in outer diameter, without increasing the neutral pressure significantly. A 20 (Alpha) beam was accelerated to a peak energy of 1 MeV with little loss and then dumped to the chamber wall by a spiller field. The current was enhanced to more than 100 (Alpha) by the addition of electron injection using a field emission cathode.

Paper Details

Date Published: 1 April 1991
PDF: 14 pages
Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); doi: 10.1117/12.43519
Show Author Affiliations
Hiroshi Ishizuka, Univ. of California/Irvine (Japan)
K. Yee, Univ. of California/Irvine (United States)
Amnon Fisher, Univ. of California/Irvine (Israel)
Norman Rostoker, Univ. of California/Irvine (United States)


Published in SPIE Proceedings Vol. 1407:
Intense Microwave and Particle Beams II
Howard E. Brandt, Editor(s)

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