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24 April 2024 |
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Stabilizing effect of enhanced resistivity on peeling-ballooning instabilities on EAST | | Xin Lin
; Debabrata Banerjee
; Ping Zhu
; Guosheng Xu
; Yang Ye
; Yifeng Wang
; Qing Zang
; Tao Zhang
; Yingjie Chen
; | | Date: |
13 Sep 2019 | | Abstract: | Previous stability analysis of NSTX equilibrium with lithium-conditioning
demonstrates that the enhanced resistivity due to the increased effective
charge number Zeff (i.e. increased impurity level) can provide a stabilizing
effect on low-n edge localized modes (Banerjee et al 2017 Nucl. Fusion 24
054501). This paper extends the resistivity stabilizing effect to the
intermediate-n peeling-ballooning (PB) instabilities with the linear stability
analysis of EAST high-confinement mode equilibria in NIMROD two-fluid
calculations. However, the resistivity stabilizing effect on PB instabilities
in the EAST tokamak appears weaker than that found in NSTX. This work may give
better insight into the physical mechanism behind the beneficial effects of
impurity on the pedestal stability. | | Source: | arXiv, 1909.6009 | | Services: | Forum | Review | PDF | Favorites | |
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