| Title: |
Resilience of quasi-isodynamic stellarators against trapped-particle instabilities |
| Authors: |
Proll, J. H. E., Helander, P., Connor, J. W., Plunk, G. G. |
| Source: |
Phys. Rev. Lett. 108, 245002 (2012) |
| Publication Year: |
2015 |
| Collection: |
Physics (Other) |
| Subject Terms: |
Physics - Plasma Physics |
| More Details: |
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. |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.108.245002 |
| Access URL: |
http://arxiv.org/abs/1509.04185 |
| Accession Number: |
edsarx.1509.04185 |
| Database: |
arXiv |
