Recent Doppler backscattering applications in Globus-M tokamak

被引：9

作者：

Yashin, A. Yu ^{[1
]}

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

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

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

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

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

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

Petrov, Yu, V ^{[2
]}

机构：

[1] Peter Great St Petersburg Polytech Univ, 29 Politekhn Skaya, St Petersburg 195251, Russia

[2] Ioffe Inst, 26 Politekhn Skaya, St Petersburg 194021, Russia

来源：

JOURNAL OF INSTRUMENTATION | 2019年 / 14卷 / 10期

关键词：

Nuclear instruments and methods for hot plasma diagnostics; Plasma diagnostics - probes; PLASMA; REFLECTOMETRY; FLUCTUATIONS;

D O I：

10.1088/1748-0221/14/10/C10025

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Recently, a four-frequency Doppler backscattering (DBS) system was installed on the Globus-M tokamak. In addition to the classical DBS application for determining the mean plasma rotational velocities, DBS was used for the investigation of different plasma oscillatory processes in the spherical Globus-M tokamak. Application of various DBS data processing allowed us to reveal and investigate plasma oscillations, such as geodesic acoustic mode, limit cycle oscillations and Alfven modes. It has been shown that DBS also allows registering filament like structures, which manifest as quasi-coherent oscillations in signals of various DBS channels. The multi-frequency DBS system makes it possible to localize plasma oscillations, their poloidal and radial sizes and mode structure. The main results of the DBS application for the study of these oscillations are presented. A comparison of the DBS data with the data of other diagnostics is also given.

引用

页数：8

共 19 条

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