The Formative Phase of a Low Pressure, High Voltage Z Pinch

Author:

Maclatchy C. S.,Barnard A. J.

Abstract

The formative phase of a 40 kV Z pinch has been investigated for pressures from 10 to 80 mTorr in H2. The energy spectrum of the electrons on the axis of the vessel, the spatial distribution of the current at the face of the anode, and the total discharge current were monitored. At the initiation of the discharge, a current of electrons with energies in excess of 20 keV is observed on the axis. This observation is in contrast to the normally accepted mode of ionization in which ionization initiates at the wall. The current is observed to switch from the axial region to the wall where it forms a current layer which collapses in accordance with the snow-plough model. The exact nature of the switching mechanism is not understood. The formative phase of the pinch typically takes a few hundred nanoseconds. The observations indicate that the detailed process of current sheet collapse may be affected by the formative phase.

Publisher

Canadian Science Publishing

Subject

General Physics and Astronomy

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Plasma dynamics and generation of hard radiations in experiments with cylindrical Z-pinches;Plasma Physics Reports;2010-03

2. High‐energy photon spectra from a coaxial gas‐puff experiment;Journal of Applied Physics;1987-04-15

3. Untersuchungen an dichtenz-Pinch-Plasmen;Fortschritte der Physik/Progress of Physics;1983

4. Polarity effects in high−pressure z pinch;Applied Physics Letters;1975-04-15

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