Bi-directional Alfv\'en Cyclotron Instabilities in the Mega-Amp Spherical Tokamak
| Autor: | Sharapov, S. E., Lilley, M. K., Akers, R., Ayed, N. Ben, Cecconello, M., Cook, J. W. C., Cunningham, G., Verwichte, E., Tea, the MAST |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Physics of Plasmas, Vol.21, Issue 8, August 2014, pp.082501 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.4891322 |
| Popis: | Alfv\'en cyclotron instabilities excited by velocity gradients of energetic beam ions were investigated in MAST experiments with super-Alfv\'enic NBI over a wide range of toroidal magnetic fields from ~0.34 T to ~0.585 T. In MAST discharges with high magnetic field, a discrete spectrum of modes in the sub-cyclotron frequency range is excited toroidally propagating counter to the beam and plasma current (toroidal mode numbers n < 0). Comment: 28 pages, 13 figures. This article has been submitted to Physics of Plasmas. After it is published, it will be found at http://scitation.aip.org/content/aip/journal/pop/browse |
| Databáze: | arXiv |
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