Toroidal Alfvén Eigenmodes in Globus-M Spherical Tokamak Plasma
- 作者: Gusev V.1, Martynov A.2, Medvedev S.2, Petrov Y.1, Patrov M.1, Tel’nova A.1
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隶属关系:
- Ioffe Physical Technical Institute
- Keldysh Institute of Applied Mathematics
- 期: 卷 44, 编号 1 (2018)
- 页面: 67-69
- 栏目: Regular Papers
- URL: https://journals.rcsi.science/1063-7850/article/view/207152
- DOI: https://doi.org/10.1134/S1063785018010133
- ID: 207152
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详细
Conditions of the excitation of toroidal Alfvén eigenmodes (TAEs) and their inf luence on the confinement of fast particles into the Globus-M spherical tokamak have been studied by KINX code calculations of the magnetohydrodynamic spectra of reconstructed divertor equilibrium configurations with stability margin q0 > 1 on the magnetic axis. The sensitivity of the frequencies of TAE modes with toroidal wavenumber n = 1 to the type of boundary conditions and choice of boundary surface has been studied. It has been established that the frequencies of modes with dominating poloidal harmonics m = 1 and 2 in the gap of continuum are significantly higher than those observed in the spectra of signals measured in the Mirnov coil probes, especially under the assumption of free plasma boundary with allowance for its compressibility. The TAE modes with lower frequencies and higher poloidal wavenumbers localized near the plasma boundary may be responsible for the oscillations observed in the experiment. However, these modes are characterized by the interaction with continuum and, probably, exhibit related damping.
作者简介
V. Gusev
Ioffe Physical Technical Institute
Email: yu.petrov@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021
A. Martynov
Keldysh Institute of Applied Mathematics
Email: yu.petrov@mail.ioffe.ru
俄罗斯联邦, Moscow, 125047
S. Medvedev
Keldysh Institute of Applied Mathematics
Email: yu.petrov@mail.ioffe.ru
俄罗斯联邦, Moscow, 125047
Yu. Petrov
Ioffe Physical Technical Institute
编辑信件的主要联系方式.
Email: yu.petrov@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021
M. Patrov
Ioffe Physical Technical Institute
Email: yu.petrov@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021
A. Tel’nova
Ioffe Physical Technical Institute
Email: yu.petrov@mail.ioffe.ru
俄罗斯联邦, St. Petersburg, 194021