NDLI: Current-sheath oscillations and reactivity in focused discharges

Content Provider	IEEE Xplore Digital Library
Author	Bortolotti, A. De Chiara, P. Desiderio, P. Mezzetti, F. Nardi, V. Powell, C.
Copyright Year	1997
Description	Author affiliation: Ferrara Univ., Italy (Bortolotti, A.)
Abstract	Summary form only given. Oscillations of the current sheath driving force J_/spl times/B_/sub /spl theta// and of its propagation velocity v strongly bear on the maximum energy E, of the accelerated ions and on the D+D neutron yield Y in the PF pinch. Magnetic probe (MP) signals \|dB/sub /spl theta///dt\| provide the amplitude /spl Delta/v of the velocity oscillations during the radial implosion phase of the current sheath. The relative amplitude /spl Delta/v/v=/spl Delta/\|dB/sub /spl theta///dt\|/[\|dB/sub /spl theta///dt\|]=25%/spl plusmn/15% of the oscillations and their period T=35 ns/spl plusmn/17 ns, determined via MP with greater accuracy than ever before, agree with previous measurements via (i) long-exposure-time schlieren imaging and (ii) secondary peaks of the electrode current (I) signal \|dI/dt\| from a Rogowsky coil between the electrode back plates. If the oscillation of v has an amplitude minimum at t=t/sub 0/-T, where t/sub 0/ is the time of the sharply defined peak in the \|dI/dt\| signal, Y is usually higher by a factor=4 than the typical value Y/sub av/ from discharges where this phase condition is not satisfied.
File Size	111949
File Format	PDF
ISBN	0780339908
ISSN	07309244
DOI	10.1109/PLASMA.1997.606314
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Probes Spectroscopy Focusing Laboratories Target tracking Acceleration Neutrons Current measurement Coils
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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