Restrike Particle Beam Experiments on a Dense Plasma Focus.
Interim annual rept. 30 Sep 80-30 Sep 81,
ILLINOIS UNIV AT URBANA FUSION STUDIES LAB
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Diagnostic tools especially an electron magnetic spectrometer and a fast Faraday cup have been used to measure the scaling of parameters of the particle beams generated in a plasma focus with the current flowing in the circuit just before the radial collapse of the pinch, IMB. The results show that negative power law energy spectra of the electrons are observed where the exponent of that power law, x x0, scales as IMB -1.15 or - 0.2 and thus the energy spectra get harder with increasing IMB. The peak in the fast electron current scales as IMB 2.9 or -0.5 and reaches a value of 15 kA for IMB approx. 450 1A. Preliminary experiments show the fast electrons occur simultaneously 5nsec with a peak in IMB which supports a model that current interruption is the accelerating mechanism for the particle beams. The results of other experiments testing this model and some of the implications for the application of the plasma focus as an opening switch are discussed. Author
- Particle Accelerators
- Plasma Physics and Magnetohydrodynamics