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Calculation of torque applied to plasma in NBI injection experiments on the TUMAN-3M tokamak
Kornev V. A.
1, Abdullina G. I.
1, Askinazi L. G.
1, Belokurov A. A.
1, Zhubr N. A.
1, Lebedev S. V.
1, Razumenko D. V.1, Tukachinskiy A. S.
1, Shuvalova L. K.
1
1Ioffe Institute, St. Petersburg, Russia
Email: Vladimir.Kornev@mail.ioffe.ru, abdullina@mail.ioffe.ru, Leonid.Askinazi@mail.ioffe.ru, belokurov@mail.ioffe.ru, n.a.zhubr@mail.ioffe.ru, Sergei.Lebedev@mail.ioffe.ru, D.Razumenko@mail.ioffe.ru, A.Tukachinsky@mail.ioffe.ru, shuvalova-lyuba@mail.ru
The results of calculations of the torque generated in the TUMAN-3M tokamak plasma during a high-energy neutral beam injection (NBI) in the co- and counter-current directions are presented. The dependences of the magnitude of the torque in the central and edge regions of the plasma on the NBI power, plasma concentration, isotopic composition of the beam and the background plasma and on some other parameters were investigated. Optimal concentration to provide the maximum value of the torque was found. The calculations demonstrated that injection of hydrogen beam into a hydrogen plasma (H_b -> Hp) near the axis results in higher values of the the torque in comparison with the scenarios D_b -> Hp, D_b -> Dp, H_b -> Dp. The radial electric field generated at the plasma boundary was estimated based on the torque simulations. Keywords: tokamak, plasma potential, radial electric field, neutral injection, toroidal plasma rotation.
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