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Title: Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector

Abstract

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.

Authors:
; ; ; ; ;  [1];  [2];  [3]
  1. Institute of Physics, University of Sao Paulo, Rua do Matao, s/n, 05508-900 SP (Brazil)
  2. (Brazil)
  3. (Sweden)
Publication Date:
OSTI Identifier:
20953422
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 78; Journal Issue: 4; Other Information: DOI: 10.1063/1.2723749; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCURACY; CALIBRATION; DIFFRACTION GRATINGS; DOPPLER EFFECT; ELECTRIC POTENTIAL; IONS; NEOCLASSICAL TRANSPORT THEORY; OPTICAL SPECTROMETERS; PHOTOMULTIPLIERS; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; PLASMA IMPURITIES; ROTATING PLASMA; TCABR TOKAMAK

Citation Formats

Severo, J. H. F., Nascimento, I. C., Kuznetov, Yu. K., Tsypin, V. S., Galvao, R. M. O., Tendler, M., Brazilian Center of Researches in Physics, Rua Xavier Sigaud 150, Rio de Janeiro BR-22290180, and Alfven Laboratory, EURATOM-Nuclear Fusion Research, Royal Institute of Technology, 10044 Stockholm. Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector. United States: N. p., 2007. Web. doi:10.1063/1.2723749.
Severo, J. H. F., Nascimento, I. C., Kuznetov, Yu. K., Tsypin, V. S., Galvao, R. M. O., Tendler, M., Brazilian Center of Researches in Physics, Rua Xavier Sigaud 150, Rio de Janeiro BR-22290180, & Alfven Laboratory, EURATOM-Nuclear Fusion Research, Royal Institute of Technology, 10044 Stockholm. Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector. United States. doi:10.1063/1.2723749.
Severo, J. H. F., Nascimento, I. C., Kuznetov, Yu. K., Tsypin, V. S., Galvao, R. M. O., Tendler, M., Brazilian Center of Researches in Physics, Rua Xavier Sigaud 150, Rio de Janeiro BR-22290180, and Alfven Laboratory, EURATOM-Nuclear Fusion Research, Royal Institute of Technology, 10044 Stockholm. Sun . "Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector". United States. doi:10.1063/1.2723749.
@article{osti_20953422,
title = {Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector},
author = {Severo, J. H. F. and Nascimento, I. C. and Kuznetov, Yu. K. and Tsypin, V. S. and Galvao, R. M. O. and Tendler, M. and Brazilian Center of Researches in Physics, Rua Xavier Sigaud 150, Rio de Janeiro BR-22290180 and Alfven Laboratory, EURATOM-Nuclear Fusion Research, Royal Institute of Technology, 10044 Stockholm},
abstractNote = {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.},
doi = {10.1063/1.2723749},
journal = {Review of Scientific Instruments},
number = 4,
volume = 78,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}