Resilience of quasi-isodynamic stellarators against trapped-particle instabilities
Plasma Physics
2015-09-15 v1
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.
Keywords
Cite
@article{arxiv.1509.04185,
title = {Resilience of quasi-isodynamic stellarators against trapped-particle instabilities},
author = {J. H. E. Proll and P. Helander and J. W. Connor and G. G. Plunk},
journal= {arXiv preprint arXiv:1509.04185},
year = {2015}
}