Abstract
A moments method approach for stellarator transport is developed and applied to devices embodying the three forms (quasihelical, quasitoroidal, and quasipoloidal) of stellarator quasisymmetry. Plasma parameter regimes are considered that lead both to stable electron and ion ambipolar electric field roots. The predicted flux surface averaged plasma flow velocity components and their two-dimensional variation within a flux surface are calculated and they approximately reflect the underlying symmetries in the magnetic field structure. Comparison of the shearing rates of the flows with linear stability growth rates for the ion temperature gradient mode indicates that shearing rates (driven by ambipolar transport) can be comparable to growth rates even in the absence of external flow drive.
| Original language | English |
|---|---|
| Article number | 056114 |
| Pages (from-to) | 1-9 |
| Number of pages | 9 |
| Journal | Physics of Plasmas |
| Volume | 12 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2005 |
Funding
This work was supported by the U.S. Department of Energy under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. The calculations in this paper have been carried out using the resources of the National Energy Research Scientific Computing Center, the Lawrence Berkeley National Laboratory, and the Center for Computational Sciences at Oak Ridge National Laboratory.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy |
