Plasma rotation measurement in small tokamaks using an optical spectrometer and a single photomultiplier as detector
2007 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 78, no 4Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2007. Vol. 78, no 4
neutral-beam injection, radial electric-field, toroidal rotation
IdentifiersURN: urn:nbn:se:kth:diva-16593DOI: 10.1063/1.2723749ISI: 000246073500020ScopusID: 2-s2.0-34247574871OAI: oai:DiVA.org:kth-16593DiVA: diva2:334635
QC 201005252010-08-052010-08-05Bibliographically approved