OSM-EIRENE modeling of neutral pressures in the Alcator C-Mod divertor
OSM-EIRENE modeling of neutral pressures in the Alcator C-Mod divertor
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DOI：
10.1016/j.jnucmat.2004.09.073
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发表时间：
2005-03
影响因子：
3.1
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
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文献类型：
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作者：
S. Lisgo;P. Börner;C. Boswell;D. Elder;B. LaBombard;B. Lipschultz;C. Pitcher;D. Reiter;P. Stangeby;J. Terry;S. Wiesen
ITER偏滤器将比现有托卡马克中的偏滤器更具碰撞性，并且用于预测ITER建模的中性建模工具需要针对类似偏滤器条件进行验证，以增加结果的置信度。EIRENE中性程序已应用于Alcator C-Mod偏滤器，在那里观察到了诸如莱曼系列光子捕获和中性粘滞等碰撞效应。用于EIRENE输入的等离子体溶液与偏滤器的可用诊断数据一致，并且使用需要大量实验数据作为输入的经验洋葱皮方法解释代码生成。偏滤器压力计算值为11±3 mTorr，比测量值25±3 mTorr低1/2。中性的解决方案是敏感的光子捕获，粘度，等离子体离子和分子之间的弹性碰撞，以及通过外部偏滤器子结构的泄漏量。
The ITER divertor will be more collisional than divertors in existing tokamaks and the neutral modeling tools used for predictive ITER modeling need to be validated for similar divertor conditions in order to increase confidence in the results. The EIRENE neutral code has been applied to the Alcator C-Mod divertor, where collisional effects such as Lyman series photon trapping and neutral viscosity have been observed. The plasma solution used as input to EIRENE agrees well with the available diagnostic data for the divertor and was generated using an empirical Onion-Skin Method interpretive code that requires a large amount of experimental data as input. The calculated divertor pressure is 11±3 mTorr, a factor ∼2 lower than the measured value of 25±3 mTorr. The neutral solution is sensitive to photon trapping, viscosity, elastic collisions between plasma ions and molecules, and the amount of leakage through the outer divertor substructure.