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Characterization of self-generated intense electron beams in a plasma focus

Published online by Cambridge University Press:  09 March 2009

P. Choi ,
C. Deeney ,
H. Herold  and
C. S. Wong
P. Choi
Affiliation:
The Blackett Laboratory, Imperial College, London SW7 2BZ, UK
C. Deeney
Affiliation:
The Blackett Laboratory, Imperial College, London SW7 2BZ, UK
H. Herold
Affiliation:
Institut fur Plasmaforschung, Universitaet Stuttgart, D7000 Stuttgart 80, FRG
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Abstract

The parameters of self-generated electron beams have been measured and correlated to the dynamics of a 60 kV, 28 kJ plasma focus. The electron beam emission occurs in two periods: the first corresponds to the initial formation and disruption of the pinched plasma and terminates with the disruption of the plasma column, and the second period occurs after the breaking up of the focus plasma. The first period is characterized by high-energy electron beams, whereas in the second period the electron beams have lower average energies but higher currents. A relativistic electron beam is found to occur around the time of first compression, when the plasma is observed to be macroscopically stable, in contrast to measurements obtained from machines with similar energies but operating at lower voltages. The plasma X-ray emission is observed to be closely related to the electron beam characteristics. Possible mechanisms for the formation of the electron beams observed are discussed.

Type
Research Article
Information
Laser and Particle Beams , Volume 8 , Issue 3 , September 1990 , pp. 469 - 476
Copyright
Copyright © Cambridge University Press 1990

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