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

Abstract

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.

Authors:
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)
Publication Date:
Research Org.:
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., NJ (United States); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1543833
Alternate Identifier(s):
OSTI ID: 1361843
Grant/Contract Number:  
AC02-05CH11231; AC02-09CH11466; FC02-08ER54975; FG02-86ER53218
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics

Citation Formats

Banerjee, Debabrata, Zhu, Ping, and Maingi, Rajesh. Stabilizing effects of enhanced resistivity due to lithium-conditioning on low-n edge localized modes in NSTX. United States: N. p., 2017. Web. doi:10.1063/1.4981931.
Banerjee, Debabrata, Zhu, Ping, & Maingi, Rajesh. Stabilizing effects of enhanced resistivity due to lithium-conditioning on low-n edge localized modes in NSTX. United States. doi:10.1063/1.4981931.
Banerjee, Debabrata, Zhu, Ping, and Maingi, Rajesh. Mon . "Stabilizing effects of enhanced resistivity due to lithium-conditioning on low-n edge localized modes in NSTX". United States. doi:10.1063/1.4981931. https://www.osti.gov/servlets/purl/1543833.
@article{osti_1543833,
title = {Stabilizing effects of enhanced resistivity due to lithium-conditioning on low-n edge localized modes in NSTX},
author = {Banerjee, Debabrata and Zhu, Ping and Maingi, Rajesh},
abstractNote = {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.},
doi = {10.1063/1.4981931},
journal = {Physics of Plasmas},
number = 5,
volume = 24,
place = {United States},
year = {2017},
month = {4}
}

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    Works referencing / citing this record:

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


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