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Post-pinch generation of electron beam in a low energy Mather-type plasma focus device

Published online by Cambridge University Press:  09 May 2013

R. A. BEHBAHANI  and
F. M. AGHAMIR
R. A. BEHBAHANI
Affiliation:
Department of Physics, University of Tehran, N. Kargar Ave, Tehran 14399, Iran (aghamir@ut.ac.ir)
F. M. AGHAMIR
Affiliation:
Department of Physics, University of Tehran, N. Kargar Ave, Tehran 14399, Iran (aghamir@ut.ac.ir)
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Abstract

The post-pinch generation of electron beam in a low energy Mather-type plasma focus (PF) device has been investigated. A fast-calibrated Rogowski coil was used to monitor the emission of electron beam. A two-channel diode X-ray spectrometer along with suitable filters provided the records of energy spectrum of X-ray radiation. Single time-period emissions of electron beam with duration of 100 to 20 ns were recorded in the high range of the device operating pressure (0.8–2 mbar). However, in the low range regime (0.2–0.8 mbar), occurrence of single spike electron beam with duration of 150 ± 50 ns, as well as multi-emission of electrons with duration of 400 ± 50 ns, was visible. A multi-peak of tube voltage along with multi-time-period radiation of X-rays dominated by copper lines (Cukα and Cukβ) was noticeable in the low-pressure range. The generated electron beam during the post-pinch phase of anomalous resistances is suspected to be the main source of X-ray radiation. This can also be related to the turbulence of the plasma column during the occurrence of anomalous resistances.

Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Issue 5 , October 2013 , pp. 777 - 782
Copyright
Copyright © Cambridge University Press 2013 

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