First observations of ion cyclotron emisison in the spherical tokamak Globus-M2
Kulygin M. S1, Balachenkov I. M.1, Bakharev N. N.1, Gusev V. K.1, Kiselev E. O.1, Minaev V.B.1, Kurskiev G.S.1, Zhiltsov N.S.1, Petrov Yu.V.1, Sakharov N.V.1, Telnova A.Yu.1, Shchegolev P.B.1
1Ioffe Institute, St. Petersburg, Russia
Email: kulygin@mail.ioffe.ru
In the Globus-M2 tokamak, using magnetic probes, emission was detected in the ion-cyclotron frequency range (the frequency of the first harmonic is in the range from 4 to 12 MHz) in discharges with injection of a beam of high-energy atoms. The observed spectra are a set of equidistant harmonics at ion cyclotron resonance frequencies for hydrogen or deuterium ions; splitting of spectral lines is also observed. Under the assumption that the detected radiation is ion-cyclotron, its localization was established. Using a three-coordinate probe, the polarization of the radiation was determined. Keywords: spherical tokamak, ion-cyclotron emission, Alfven cyclotron instability.
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