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Start Over Author "Durst R" Journal review of scientific instruments
14 results on '"Durst R"'

13. On-line tangential soft x-ray/VUV tomography on COMPASS-C.

Author

Durst, R. D.

Subjects
*TOMOGRAPHY, *CAMERAS, *PHYSICS instruments
Abstract

A tangentially viewing pinhole camera has been used to image the COMPASS-C plasma in the vacuum ultraviolet and soft x-ray spectral regions with framing rates up to 330 Hz. The PC-based system acquires up to 256 128 × 128 pixel images per shot and incorporates an array processor to allow on-line tomographic reconstructions. Data compression is used to reduce the data load by a factor of 4. [ABSTRACT FROM AUTHOR]

Published
1990

14. q-profile measurement in tokamaks using fueling pellets.

Author

Durst, R. D., Phillips, P. E., and Rowan, William L.

Subjects
*TOKAMAKS, *MAGNETIC fields, *SCIENTIFIC apparatus & instruments
Abstract

Fuel pellets ablating in a hot, magnetically confined plasma generate cold, self-luminous filaments which seem to orient themselves along the local magnetic field direction. This distinctive ablation pattern has been used for local measurements of the q profile. In the Texas Experimental Tokamak (TEXT), this technique was investigated experimentally, and the results were compared to other q-profile measurements to examine limits of applicability. It is found that the technique may be applied only to limited regions of the plasma. Although the mechanism which causes the filaments to align along the magnetic field lines is riot completely understood, comparisons between this technique and other techniques tend to support its use. Inclination angle profiles for the local magnetic field and q profiles obtained on TEXT by this technique are presented. The q profiles are compared with predictions based on various resistivity models, specifically classical, neoclassical, and q-clamped. [ABSTRACT FROM AUTHOR]

Published
1988
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