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Author Tritz, K. ♦ Fonck, R. ♦ Thorson, T.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ TOKAMAK DEVICES ♦ STARK EFFECT ♦ PLASMA DIAGNOSTICS ♦ IMAGES ♦ X RADIATION ♦ CAMERAS ♦ SOFT X RADIATION ♦ JET TOKAMAK ♦ TWO-DIMENSIONAL CALCULATIONS ♦ DESIGN ♦ X-RAY DETECTION ♦ CURRENT DENSITY
Abstract For low-aspect ratio toroidal devices, flux shape information can be used as a constraint for reconstruction of the plasma current profile and {ital q} profile. A model current profile was used to compare the sensitivity of the equilibrium reconstruction using soft x-ray (SXR) image constraints to motional Stark effect (MSE) constraints. The deviation in the {chi}{sup 2} of the fit versus current profile was similar in both cases, showing that the SXR data is as good a constraint on the equilibrium as MSE information. There are two soft x-ray imaging systems under consideration to determine the shape of the internal flux surfaces on PEGASUS. One diagnostic consists of a series of vertically spaced, tangentially viewing linear detector arrays. Another design using a two-dimensional pinhole camera for a soft x-ray image of the plasma is also being evaluated. {copyright} {ital 1999 American Institute of Physics.}
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-01-01
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 70
Issue Number 1
Technical Publication No. CONF-980605-


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