Accession Number : ADA114244

Title :   Restrike Particle Beam Experiments on a Dense Plasma Focus.

Descriptive Note : Interim annual rept. 30 Sep 80-30 Sep 81,

Corporate Author : ILLINOIS UNIV AT URBANA FUSION STUDIES LAB

Personal Author(s) : Gerdin,Glenn

PDF Url : ADA114244

Report Date : 30 Nov 1981

Pagination or Media Count : 46

Abstract : 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 I(MB) (-1.15 + or - 0.2) and thus the energy spectra get harder with increasing I(MB). The peak in the fast electron current scales as I(MB) (2.9 + or -0.5) and reaches a value of 15 kA for I(MB) approx. 450 1A. Preliminary experiments show the fast electrons occur simultaneously (+5nsec) with a peak in I(MB) 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)

Descriptors :   *Plasma diagnostics, *Electron beams, *Plasma devices, *Deuteron beams, *Ion beams, Diagnostic equipment, Experimental design, Particle beams, Test methods, Dense gases, Magnetic fields, Coupling(Interaction), Plasmas(Physics), Spectrometers

Subject Categories : Particle Accelerators
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE