SOLPS modeling of the effect on plasma detachment of closing the lower divertor in DIII-D
SOLPS modeling of the effect on plasma detachment of closing the lower divertor in DIII-D
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DIII-D 中关闭下部偏滤器对血浆脱离影响的 SOLPS 建模
DOI：
10.1088/1361-6587/59/2/025009
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发表时间：
2017-02
影响因子：
2.2
通讯作者：
D M Thomas
中科院分区：
文献类型：
--
作者：
B Covele;L L Lao;A L Moser;D M Thomas
为了评估紧密关闭DIII-D中目前几乎完全打开的下导流器对实现冷耗散/分离导流器条件的影响，进行了刮擦层等离子体模拟建模。为了隔离其他因素对导流器等离子体溶液的影响并进行直接比较，包括网格在内的大部分参数尽量保持相似。只有中性挡板进行了修改，以比较完全打开的转流器和紧密关闭的转流器。模型表明，紧密闭合的导流器极大地改善了回收中性的捕获，从而增加了导流器中的辐射和电荷交换损失，降低了靶板深处的电子温度Tet和沉积功率密度qdeep。此外，封闭结构使导流器等离子体能够以较低的上游密度进入高耗散和分离的导流器状态。本文还论证了导流器关闭对中性密度和压力的影响，以及它们与导流器等离子体条件的相关性。评估了分子D2 -离子D+弹性碰撞和中性-中性碰撞对转移剂等离子体溶液的影响。
Scrape-off layer plasma simulation modeling has been carried out to assess the effect of tightly closing the lower divertor in DIII-D, which at present is almost fully open, on the achievement of cold dissipative/detached divertor conditions. To isolate the impact of other factors on the divertor plasma solution and to make direct comparisons, most of the parameters including the meshes were kept as similar as possible. Only the neutral baffling was modified to compare a fully open divertor with a tightly closed one. The modeling shows that the tightly closed divertor greatly improves trapping of recycling neutrals, thereby increasing radiative and charge exchange losses in the divertor and reducing the electron temperature Tet and deposited power density qdep at the target plate. Furthermore, the closed structure enables the divertor plasma to enter into highly dissipative and detached divertor conditions at a significantly lower upstream density. The effects of divertor closure on the neutral density and pressure, and their correlation with the divertor plasma conditions are also demonstrated. The effect of molecular D2−ion D+ elastic collisions and neutral–neutral collisions on the divertor plasma solution are assessed.
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影响因子：
3.1
作者：
S. Lisgo;P. Börner;C. Boswell;D. Elder;B. LaBombard;B. Lipschultz;C. Pitcher;D. Reiter;P. Stangeby;J. Terry;S. Wiesen
通讯作者：
S. Lisgo;P. Börner;C. Boswell;D. Elder;B. LaBombard;B. Lipschultz;C. Pitcher;D. Reiter;P. Stangeby;J. Terry;S. Wiesen
影响因子：
3.3
作者：
A. Loarte;R. Monk;J. R. Martin-Solis;D. Campbell;A. Chankin;S. Clement;S. Davies;J. Ehrenberg
通讯作者：
A. Loarte;R. Monk;J. R. Martin-Solis;D. Campbell;A. Chankin;S. Clement;S. Davies;J. Ehrenberg
影响因子：
3.3
作者：
A. Chankin;D. Coster;R. Dux;C. Fuchs;G. Haas;A. Herrmann;L. Horton;A. Kallenbach;B. Kurzan-
通讯作者：
A. Chankin;D. Coster;R. Dux;C. Fuchs;G. Haas;A. Herrmann;L. Horton;A. Kallenbach;B. Kurzan-
影响因子：
3.3
作者：
J. Roth;C. García-Rosales
通讯作者：
J. Roth;C. García-Rosales
影响因子：
2.2
作者：
H. Du;C. Sang;Liang Wang;X. Bonnin;Houyang Y Guo;Ji-zhong Sun;Dezhen Wang
通讯作者：
H. Du;C. Sang;Liang Wang;X. Bonnin;Houyang Y Guo;Ji-zhong Sun;Dezhen Wang