| Original Articles |
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Effect of Magnetohydrodynamic Perturbations on the Orbit Loss
of Alpha Particles in Tokamak Plasma |
| WU Liang-Neng1;YU Guo-Yang2 |
| 1Department of Physics, China Institute of Metrology,
Hangzhou 310034
2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 |
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| Cite this article: |
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WU Liang-Neng, YU Guo-Yang 2002 Chin. Phys. Lett. 19 1312-1315 |
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Abstract We investigate the orbit loss of alpha particles under helical magnetic perturbation in a tokamak. The results show that low-frequency and low-mode number magnetic perturbation can cause stochastic loss of alpha particles. This effect is significant for those particles close to the boundary between the transit zone and the trapped zone. The particle loss is sensitive to the phase of the magnetic perturbation, indicating the modulation of the particle loss with respect to magnetic perturbation. It is also found that the precession of the particle banana orbit can even further enhance the particle loss.
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| Keywords:
52.20.Dq
52.55.Fa
52.55.Pi
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Published: 01 September 2002
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| PACS: |
52.20.Dq
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(Particle orbits)
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52.55.Fa
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(Tokamaks, spherical tokamaks)
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52.55.Pi
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(Fusion products effects (e.g., alpha-particles, etc.), fast particle effects)
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