Effect of locked MHD modes on the efficiency of plasma heating by the neutral beam injection method at the Globus-M2 spherical tokamak

Abstract

A set of magnetic coils used to correct the error fields at the Globus-M2 spherical tokamak, which appear due to the imperfections of the production and assembly of the tokamak magnetic system, is described. The magnetic sensors that are used to monitor the locked helical MHD modes are also described. The results of experiments on detecting the locked modes in the discharges with plasma heating by neutral beam injection are presented. A correlation is found between the appearance of the locked modes accompanied by the loss of fast ions and the confinement of the main plasma.

About the authors

Yu. V. Petrov

Ioffe Institute, Russian Academy of Sciences

Author for correspondence.
Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

I. M. Balachenkov

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

N. N. Bakharev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

V. I. Varfolomeev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

A. V. Voronin

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

V. K. Gusev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

N. S. Zhiltsov

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

A. A. Kavin

Efremov Research Institute of Electrophysical Apparatus

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 196641

E. O. Kiselev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

G. S. Kurskiev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

V. B. Minaev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

I. V. Miroshnikov

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

A. N. Novokhatskii

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

N. V. Sakharnov

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

O. M. Skrekel

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

V. V. Solokha

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

A. Yu. Telnova

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

E. E. Tkachenko

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

V. A. Tokarev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

S. Yu. Tolstyakov

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

E. A. Tukhmeneva

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

N. A. Khromov

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

P. B. Shchegolev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

K. D. Shulyatyev

Ioffe Institute, Russian Academy of Sciences

Email: yu.petrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021

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