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Title: Effect of the axial magnetic field on a metallic gas-puff pinch implosion

Abstract

The effect of an axial magnetic field B{sub z} on an imploding metallic gas-puff Z-pinch was studied using 2D time-gated visible self-emission imaging. Experiments were performed on the IMRI-5 generator (450 kA, 450 ns). The ambient field B{sub z} was varied from 0.15 to 1.35 T. It was found that the initial density profile of a metallic gas-puff Z-pinch can be approximated by a power law. Time-gated images showed that the magneto-Rayleigh–Taylor instabilities were suppressed during the run-in phase both without axial magnetic field and with axial magnetic field. Helical instability structures were detected during the stagnation phase for B{sub z} < 1.1 T. For B{sub z} = 1.35 T, the pinch plasma boundary was observed to be stable in both run-in and stagnation phases. When a magnetic field of 0.3 T was applied to the pinch, the soft x-ray energy was about twice that generated without axial magnetic field, mostly due to longer dwell time at stagnation.

Authors:
; ; ; ;  [1];  [1];  [2];  [3]
  1. Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences, Tomsk 634055 (Russian Federation)
  2. (Russian Federation)
  3. Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)
Publication Date:
OSTI Identifier:
22600143
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DENSITY; EMISSION; HELICAL INSTABILITY; IMAGES; IMPLOSIONS; MAGNETIC FIELDS; PLASMA; RAYLEIGH-TAYLOR INSTABILITY; SOFT X RADIATION; STAGNATION; TWO-DIMENSIONAL SYSTEMS

Citation Formats

Rousskikh, A. G., Zhigalin, A. S., Frolova, V., Yushkov, G. Yu., Baksht, R. B., Oreshkin, V. I., Tomsk Polytechnic University, Tomsk 634050, and Velikovich, A. L.. Effect of the axial magnetic field on a metallic gas-puff pinch implosion. United States: N. p., 2016. Web. doi:10.1063/1.4953048.
Rousskikh, A. G., Zhigalin, A. S., Frolova, V., Yushkov, G. Yu., Baksht, R. B., Oreshkin, V. I., Tomsk Polytechnic University, Tomsk 634050, & Velikovich, A. L.. Effect of the axial magnetic field on a metallic gas-puff pinch implosion. United States. doi:10.1063/1.4953048.
Rousskikh, A. G., Zhigalin, A. S., Frolova, V., Yushkov, G. Yu., Baksht, R. B., Oreshkin, V. I., Tomsk Polytechnic University, Tomsk 634050, and Velikovich, A. L.. Wed . "Effect of the axial magnetic field on a metallic gas-puff pinch implosion". United States. doi:10.1063/1.4953048.
@article{osti_22600143,
title = {Effect of the axial magnetic field on a metallic gas-puff pinch implosion},
author = {Rousskikh, A. G. and Zhigalin, A. S. and Frolova, V. and Yushkov, G. Yu. and Baksht, R. B. and Oreshkin, V. I. and Tomsk Polytechnic University, Tomsk 634050 and Velikovich, A. L.},
abstractNote = {The effect of an axial magnetic field B{sub z} on an imploding metallic gas-puff Z-pinch was studied using 2D time-gated visible self-emission imaging. Experiments were performed on the IMRI-5 generator (450 kA, 450 ns). The ambient field B{sub z} was varied from 0.15 to 1.35 T. It was found that the initial density profile of a metallic gas-puff Z-pinch can be approximated by a power law. Time-gated images showed that the magneto-Rayleigh–Taylor instabilities were suppressed during the run-in phase both without axial magnetic field and with axial magnetic field. Helical instability structures were detected during the stagnation phase for B{sub z} < 1.1 T. For B{sub z} = 1.35 T, the pinch plasma boundary was observed to be stable in both run-in and stagnation phases. When a magnetic field of 0.3 T was applied to the pinch, the soft x-ray energy was about twice that generated without axial magnetic field, mostly due to longer dwell time at stagnation.},
doi = {10.1063/1.4953048},
journal = {Physics of Plasmas},
number = 6,
volume = 23,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}