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Title: Stabilizing effects of enhanced resistivity due to lithium-conditioning on low-n edge localized modes in NSTX

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.4981931 · OSTI ID:1543833
ORCiD logo [1]; ORCiD logo [2];  [3]
  1. Univ. of Science and Technology of China, Anhui (China)
  2. Univ. of Science and Technology of China, Anhui (China); Univ. of Wisconsin-Madison, Madison, WI (United States)
  3. 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 Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Princeton Univ., Princeton, 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, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 24; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Summary of magnetic fusion plasma physics in 1st AAPPS-DPP meeting journal March 2018