influence of li conditioning on lower hybrid current drive efficiency in h-mode and l- mode plasmas on east
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2017
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Abstract
The lower hybrid current drive efficiency on the EAST tokamak is estimated on a large database of low loop voltage discharges (VL<120mV) covering the 2016 campaign starting with lithium-free plasma facing components and ending with strong cumulated deposition of lithium. The efficiency is found to vary in a wide range from 0.6 to 1.2×1019A.W-1.m-2. No deleterious effect of the density on the efficiency is found between 2.3 and 3.2×1019m-3. The high efficiency occurs after strong lithium evaporation. The low effective charge Zeff and the higher temperature of these discharges, can account for the high efficiency according to the expected scaling with Zeff and . Modelling with a ray-tracing code coupled to a Fokker-Planck solver supports this result, assuming that the fast electron transport is reduced in the zero loop voltage discharge with high efficiency.
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| Reference Key |
marc2017epjinfluence
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|---|---|
| Authors | ;Goniche Marc;Li Miaohui;Peysson Yves;Chen Yingjie;Ding Bojiang;Ekedahl Annika;Liu Haiqing;Liu Yong;Qian Jinping;Yang Xiuda;Zang Qing;Zhang Tao;Zhen Sun;Zou Xiao-Lan |
| Journal | utilitas mathematica |
| Year | 2017 |
| DOI |
10.1051/epjconf/201715703018
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| URL | |
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