NDLI: Plasma formation around single wires

Content Provider	IEEE Xplore Digital Library
Author	Duselis, Peter U. Kusse, Bruce R.
Copyright Year	2002
Description	Author affiliation: Laboratory of Plasma Studies, 369 Upson Hall, Cornell University, Ithaca NY, USA (Duselis, Peter U.; Kusse, Bruce R.)
Abstract	At Cornell's Laboratory of Plasma Studies, single wires of various metals were exploded using a ∼250 ns pulser with a rise time of ∼20 A/ns. It was found that the wires first experience a resistive heating phase that lasts 50–80 ns before a rapid collapse of voltage. From that point on, the voltage across the wire was negligible while the current through the wire continued to increase. We attribute this voltage collapse to the formation of plasma about the wire. Further confirmation of this explanation will be presented along with new experimental data describing preliminary spectroscopy results, the expansion rate of the plasma, and current flow along the wire as a function of radius. The resistance of the wire-electrode connection will be shown to significantly affect the energy deposition. Various diagnostics were used to obtain these experiments. Ultraviolet sensitive vacuum photodiodes and a framing camera with an 8 ns shutter were used to detect and measure the width of the visible light emitted by the plasma. A special wire holder was constructed that allowed the transfer of current from the wire to the surrounding plasma to be observed.
Starting Page	205
Ending Page	208
File Size	732465
Page Count	4
File Format	PDF
ISBN	9780735401075
ISSN	0094243X
DOI	10.1063/1.1531315
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-06-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	AIP
Subject Keyword	Heating Plasmas Cathodes
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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