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SUMMARY A D20 FIR laser emitting O.5J in 1.41s at 38511m and a heterodyne receiver with a noise temperature of 8000 °K (DSB) were used in a Thomson scattering experiment to measure the ion temperature of a tokamak plasma during a single laser shot. Series of measurements underreproducible plasma conditions have been carried out in H -, D -, and He- plasmas. Their statistical analysis yielded a typical relative error of 25% fora single shot measurement. (1) P. Woskoboinikow, W.J. Mulligan, J. Machuzak, D.R. Cohn, R.J. Temkin, T.C.L.G. Sollner, and B. Lax, "385µm D 20 Laser Collective Thomson Scattering IonTemperature Diagnostic ", 11th European Conf. on Contr. Fusion and Plasma Physics, Aachen, FRG, 5 -9September 1983Figure Captions : Fig.1 Spectra of scattered radiation obtained fordifferent ion species H : hydrogen plasmaD : deuterium plasma He: helium plasmaFig. 2 Thomson scattering from a H- plasma The spectrum has been recorded in a single laser shot.Fig. 3 Calculated spectra for a H- plasma(1) |
