Radial current in tokamak during neutral beam injection
Abstract
Generation of radial current I r during the ionization of fast deuterons in their neutral beam injected into a tokamak is considered. The current I r and force F determined by the [ I r × B] product vary in a complicated manner along the tokamak radius. For this reason, the torque that arises together with force F also nonuniformly varies along the radius, which can lead to a shear in the rotation velocity. A sufficiently large magnitude of this shear can result in reduction of both micro- and macroinstabilities in tokamak plasma [1, 2]. The influence of injected beam characteristics and other experimental parameters on the spatial distribution of I r in the TUMAN-3M tokamak is considered.
- Publication:
-
Technical Physics Letters
- Pub Date:
- February 2013
- DOI:
- 10.1134/S106378501302017X
- Bibcode:
- 2013TePhL..39..220A