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Fast-Probe Plasma Diagnostics

Published online by Cambridge University Press:  22 February 2011

Dennis M. Manos  and
Stephen J. Kilpatrick
Dennis M. Manos
Affiliation:
Princeton University, Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
Stephen J. Kilpatrick
Affiliation:
Princeton University, Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
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Abstract

We have used a variety of electrostatic, calorimetric and sample exposure probes to diagnose the edge plasma of neutral-beam heated discharges on the tokamak fusion test reactor (TFTR).

In the past, spatial profiles of electron density and temperature, and other edge parameters, were generated by repositioning probes between discharges during experiments consisting of a large number of nominally identical discharges. Recently, we have employed a probe which executes a relatively rapid stroke to generate spatial and temporal profiles during a single discharge. This has greatly enhanced our ability to perform systematic studies of the edge plasma as various operating variables are changed. In addition, this rapid radial motion permits withdrawal of the probe during portions of the discharge when the intense neutral beam heating would otherwise damage the measuring tips.

Applications of such a technique to low temperature, process plasmas will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 117: Symposium C – Process Diagnostics: Materials, Combustion, Fusion , 1988 , 263
Copyright
Copyright © Materials Research Society 1988

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