Ion Temperature Measurements In A Tokamak By Collective Thomson Scattering Of Fir Laser Radiation

R. Behn; D. Dicken; J. Hackmann; S. A. Salito; M. R. Siegrist

doi:10.1117/12.978380

18 November 1989 Ion Temperature Measurements In A Tokamak By Collective Thomson Scattering Of Fir Laser Radiation

R. Behn, D. Dicken, J. Hackmann, S. A. Salito, M. R. Siegrist

Proceedings Volume 1039, 13th Intl Conf on Infrared and Millimeter Waves; (1989) https://doi.org/10.1117/12.978380
Event: 13th International Conference on Infrared and Millimeter Waves, 1987, Honolulu, HI, United States

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.

Citation Download Citation

R. Behn, D. Dicken, J. Hackmann, S. A. Salito, and M. R. Siegrist "Ion Temperature Measurements In A Tokamak By Collective Thomson Scattering Of Fir Laser Radiation", Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); https://doi.org/10.1117/12.978380

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