Effects of negative magnetic shear on toroidicity induced eigenmode instability in tokamaks
- International Center for Theoretical Physics, P.O. Box 586, 34100 Trieste (Italy)
- Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)
The effects of negative magnetic shear on the toroidicity induced (TI) eigenmode instability are studied with a numerical WKB shooting scheme. The ion temperature gradient (ITG or {eta}{sub i}) and the parallel velocity shear (PVS) of the ions are included. It is found that for a given set of plasma parameters, the damping mechanism from a negative magnetic shear is much stronger than it is from a positive shear of equal magnitude. The effects of PVS on TI modes are demonstrated to be destabilizing. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 527862
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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