Stabilizing effects of enhanced resistivity due to lithium-conditioning on low-n edge localized modes in NSTX
- Univ. of Science and Technology of China, Anhui (China)
- Univ. of Science and Technology of China, Anhui (China); Univ. of Wisconsin-Madison, Madison, WI (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
The stabilizing effects of enhanced edge resistivity on edge-localized instabilities in high confinement discharges due to lithium-conditioning in the National Spherical Torus Experiment are identified for the first time. Linear stability analysis of the experimentally constrained equilibrium suggests that the change in the equilibrium plasma density and pressure profiles alone due to lithium-conditioning may be insufficient for a complete suppression of low toroidal mode number peeling-ballooning modes. In conclusion, the enhanced resistivity due to the increased effective electric charge number Zeff after lithium-conditioning provides additional stabilization of the edge localized modes. Notably, this stabilizing effect by enhanced edge resistivity becomes evident only in two-fluid magnetohydrodynamic simulations.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Princeton Univ., NJ (United States); Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; AC02-09CH11466; FC02-08ER54975; FG02-86ER53218
- OSTI ID:
- 1543833
- Alternate ID(s):
- OSTI ID: 1361843
- Journal Information:
- Physics of Plasmas, Vol. 24, Issue 5; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Summary of magnetic fusion plasma physics in 1st AAPPS-DPP meeting
|
journal | March 2018 |
Similar Records
Stabilizing effect of enhanced resistivity on peeling-ballooning instabilities on EAST
Stabilizing effect of resistivity towards ELM-free H-mode discharge in lithium-conditioned NSTX