Application of Doppler Backscattering for Alfven Mode Study on the Globus-M Spherical Tokamak

被引：6

作者：

Bulanin, V. V. ^{[1
,2
]}

Bakharev, N. N. ^{[2
]}

Gusev, V. K. ^{[2
]}

Kurskiev, G. S. ^{[2
]}

Minaev, V. B. ^{[2
]}

Patrov, M. I. ^{[2
]}

Petrov, A. V. ^{[1
]}

Petrov, Yu. V. ^{[2
]}

Sakharov, N. V. ^{[2
]}

Shchegolev, P. B. ^{[2
]}

Telnova, A. Yu. ^{[2
]}

Tolstyakov, S. Yu. ^{[2
]}

Yashin, A. Yu. ^{[1
,2
]}

机构：

[1] Peter Great St Petersburg Polytech Univ, St Petersburg 195251, Russia

[2] Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICS OF ATOMIC NUCLEI | 2020年 / 83卷 / 07期

基金：

俄罗斯科学基金会;

关键词：

spherical tokamak; Alfvé n oscillations; Doppler backscattering;

D O I：

10.1134/S1063778820070042

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The Alfven oscillations were studied using the multifrequency Doppler backscattering (DBS) method on the Globus-M spherical tokamak during the neutral deuterium injection. The principles of Alfven mode registration by the DBS method are discussed. Microwave schemes of multifrequency probing are described. It is shown that the observed plasma rotation velocity oscillations are due to the oscillations of the drift velocity in crossed radial electric field of the Alfven wave and the magnetic field. The absolute values of the magnetic field perturbations of the toroidal Alfven eigenmode (TAE) in the internal regions of the tokamak discharge are determined. The obtained data are compared with the results of the magnetic field oscillations measurements obtained by a magnetic probe located outside the plasma region. The use of multifrequency probing in the DBS method made it possible to determine the radial distributions of the amplitude of magnetic field oscillations. These data were obtained for oscillations at the TAE fundamental frequency and at harmonic frequencies, which were found to correspond to different toroidal mode numbers. In general, the data obtained can be compared with the results of numerical modeling of the Alfven spectrum in the Globus-M tokamak. The prospects for the further use of the DBS method for studying Alfven oscillations in toroidal installations are discussed.

引用

页码：1124 / 1130

页数：7

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