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Proceedings Paper

Suppression of coherence effects in the measurement of mm wave absorption in the JET plasma
Author(s): A. R. Harvey
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Paper Abstract

The pumped divertor(1) is a major upgrade for the JET tokamak. Its purpose is to control the influx of impurities intothe plasma and minimize the heat loading on the target tiles. The plasma parameters in the divertor region, low electrontemperature, Te, (10-100 eV) and high electron density, ne, (-1020 m-3) are very different from those of the bulk plasma.Electron cyclotron emission (ECE) cannot be used to measure local Te because of the resulting low optical depth, T.However low t makes the measurement of electron cyclotron absorption (ECA) feasible(2)(3). The absorption is directlyrelated to the local neTe product.

Paper Details

Date Published: 30 August 1993
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21043K (30 August 1993); doi: 10.1117/12.2298560
Show Author Affiliations
A. R. Harvey, Univ. of St. Andrews (United Kingdom)


Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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