Resilience of quasi-isodynamic stellarators against trapped-particle instabilities.
Phys Rev Lett
; 108(24): 245002, 2012 Jun 15.
Article
in En
| MEDLINE
| ID: mdl-23004281
ABSTRACT
It is shown that in perfectly quasi-isodynamic stellarators, trapped particles with a bounce frequency much higher than the frequency of the instability are stabilizing in the electrostatic and collisionless limit. The collisionless trapped-particle instability is therefore stable as well as the ordinary electron-density-gradient-driven trapped-electron mode. This result follows from the energy balance of electrostatic instabilities and is thus independent of all other details of the magnetic geometry.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2012
Document type:
Article
Affiliation country:
Germany