NDLI: Use of discrete B-dot loops for load current measurements very close to an argon Z-pinch on Double Eagle

Content Provider	IEEE Xplore Digital Library
Author	Thompson, J. Allen, R. Coleman, P. Commisso, R. Qi, N. Scott, M. Weber, B.
Copyright Year	2004
Description	Author affiliation: Alameda Appl. Sci. Corp., San Leandro, CA, USA (Thompson, J.)
Abstract	Summary form only given. We report here load current measurements using ceramic encapsulated, single loop B-dots mounted less than a centimeter outside the return current posts. DE was operating in a long pulse mode, delivering peak currents up to 3.5 MA and enabling implosions times up to 250 ns to be investigated. The principal goal of the test series was to study the K-shell yield dependence on changes in gas distribution for two different nozzle designs. The load current B-dots showed initial axial current propagation. This is consistent with nozzle gas flow calculations that show the presence of some gas from the nozzle extending out to the return post radius. For shots with reduced gas densities in the region of the current return posts, corresponding to the best K-shell yield conditions, the shape of the load current monitors tracked each other significantly better in the later time leading up to the implosion. Even under those conditions, they showed evidence of plasma shielding in that the current bite associated with the implosion was muted and delayed relative to that seen in the standard upstream load current monitor. The degree to which the B-dots provided qualitative or quantitative information on the PRS implosion is discussed.
Sponsorship	Plasma Sci. and Applications Committee of the IEEE Nuclear and Plasma Sci. Soc
File Size	69540
File Format	PDF
ISBN	0780383346
ISSN	07309244
DOI	10.1109/PLASMA.2004.1339958
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Argon Plasma measurements Plasma density Plasma x-ray sources Wire X-ray imaging Fluid flow Density measurement Charge measurement
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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