Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector
- Institute of Physics, University of Sao Paulo, Rua do Matao, s/n, 05508-900 SP (Brazil)
The method for plasma rotation measurement in the tokamak TCABR is reported in this article. During a discharge, an optical spectrometer is used to scan sequentially spectral lines of plasma impurities and spectral lines of a calibration lamp. Knowing the scanning velocity of the diffraction grating of the spectrometer with adequate precision, the Doppler shifts of impurity lines are determined. The photomultiplier output voltage signals are recorded with adequate sampling rate. With this method the residual poloidal and toroidal plasma rotation velocities were determined, assuming that they are the same as those of the impurity ions. The results show reasonable agreement with the neoclassical theory and with results from similar tokamaks.
- OSTI ID:
- 20953422
- Journal Information:
- Review of Scientific Instruments, Vol. 78, Issue 4; Other Information: DOI: 10.1063/1.2723749; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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