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Title: Investigation of the effect of a power feed vacuum gap in solid liner experiments at 1 MA

We present an experimental study of plasma initiation of a solid metal liner at the 1 MA level. In contrast to previous work, we introduce a vacuum gap at one of the liner connections to the power feed to investigate how this affects plasma initiation and to infer how this may affect the symmetry of the liner in compression experiments. We observed that the vacuum gap causes non-uniform plasma initiation both azimuthally and axially in liners, diagnosed by gated optical imaging. Using magnetic field probes external to the liner, we also determined that the optical emission is strongly linked to the current distribution in the liner. The apparent persistent of azimuthal non-uniformities may have implications for fusion-scale liner experiments.
Authors:
; ;  [1] ; ; ; ; ; ; ; ;  [2]
  1. Center for Energy Research, University of California, San Diego, California 92093 (United States)
  2. Laboratory for Plasma Studies, Cornell University, Ithaca, New York 14853 (United States)
Publication Date:
OSTI Identifier:
22493795
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPRESSION; CURRENTS; IMAGES; LINERS; MAGNETIC FIELDS; METALS; PLASMA; PROBES; SOLIDS; SYMMETRY