Spectroscopic diagnosis of foamz-pinch plasmas on SATURN
作者:
T. J. Nash,
M. S. Derzon,
G. Allshouse,
C. Deeney,
D. Jobe,
J. Seaman,
T. Gilliland,
J. McGurn,
J. J. MacFarlane,
P. Wang,
期刊:
Review of Scientific Instruments
(AIP Available online 1997)
卷期:
Volume 68,
issue 1
页码: 1083-1086
ISSN:0034-6748
年代: 1997
DOI:10.1063/1.1147740
出版商: AIP
数据来源: AIP
摘要:
Solid and annular silicon aerogel and agar foams were imploded on the SATURN accelerator to study plasma initiation, acceleration, and stagnation. SATURN delivers 7 MA with a 50 ns rise time to these foam loads. We fielded several spectroscopic diagnostics to measure plasma parameters throughout thez-pinch discharge. A spatially resolved single frame time-gated extreme ultraviolet spectrometer measured the extent of plasma ablation off the surface of the foam. A time integrated crystal spectrometer showed that characteristicKshell radiation of silicon in the aerogel and of sulfur and sodium impurities in the agar were attenuated when the foam loads were coated with a conductive layer of gold. A time-resolved pinhole camera showed that in general the quality of the pinch implosions was poor but improved with increasing efforts to improve current continuity such as prepulse and conductive coatings. ©1997 American Institute of Physics.
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