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Proceedings Paper

Ion Temperature Measurements In A Tokamak By Collective Thomson Scattering Of Fir Laser Radiation
Author(s): R. Behn; D. Dicken; J. Hackmann; S. A. Salito; M. R. Siegrist
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Paper Abstract

As a result of steady progress in high power FIR lasers and sensitive, low-noise detection systems, the equipment is now available to measure the ion temperature (Ti) of tokamak plasmas by Thomson scattering from thermal density fluctuations. Using a laser in the far-infrared wavelength range permits scattering angles as large as 90° which results in excellent spatial resolution of the measurement. Heterodyne receivers built around Schottky barrier diode mixers combine high sensitivity with large electrical bandwidth to cover the frequency spread of the scattered radiation. After a first demonstration of feasibility was reported by Woskoboinikow et al (1), recent improvements on our system made it possible for the first time to measure Ti in a single laser shot.

Paper Details

Date Published: 18 November 1989
PDF: 2 pages
Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); doi: 10.1117/12.978380
Show Author Affiliations
R. Behn, Centre de Recherches en Physique des Plasmas (Switzerland)
D. Dicken, Universitat Dusseldorf (F.R.G.)
J. Hackmann, Universitat Dusseldorf (F.R.G.)
S. A. Salito, Centre de Recherches en Physique des Plasmas (Switzerland)
M. R. Siegrist, Centre de Recherches en Physique des Plasmas (Switzerland)

Published in SPIE Proceedings Vol. 1039:
13th Intl Conf on Infrared and Millimeter Waves
Richard J. Temkin, Editor(s)

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