An analysis of the ablation rate for solid pellets injected into neutral beam heated toroidal plasmas
An analysis of the ablation rate for solid pellets injected into neutral beam heated toroidal plasmas
复制标题
注入中性束加热环形等离子体的固体颗粒的烧蚀率分析
DOI：
10.1088/0029-5515/26/7/007
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发表时间：
1986
期刊：
影响因子：
3.3
通讯作者：
M. Wakatani
中科院分区：
文献类型：
--
作者：
Y. Nakamura;H. Nishihara;M. Wakatani
讨论了计算固体弹丸注入中性束加热环形等离子体的烧蚀率的新模型。它是帕克斯和特恩布尔提出的中性云屏蔽模型的扩展。推导了描述在电子热流和快离子热流同时存在的情况下，从弹丸表面烧蚀出的中性粒子的跨音速定常流动的流体方程，并将其作为特征值问题求解。当快离子密度较高时，在低电子温度、低密度等离子体(如边缘等离子体)中，快离子对烧蚀率的影响是显著的。当快离子烧蚀占主导地位而电子热流可以忽略时，烧蚀速率由一个类似于只考虑电子热流的标度关系给出。-在电子温度和密度的自限近似下，显示了PDX托卡马克类等离子体的烧蚀率分布的一个例子。结果与包含快离子的米洛拉模型的结果进行了比较。
A new model for calculating the ablation rate of a solid pellet injected into a neutral-beam-heated toroidal plasma is discussed. It is an extension of the neutral cloud shielding model introduced by Parks and Turnbull. Fluid equations describing a transonic stationary flow of neutral particles ablated from the pellet surface in the presence of both electron heat flux and of flux due to fast ions are derived and solved as an eigenvalue problem. – The effect of fast ions on the ablation rate is significant in low electron temperature and low density plasmas such as edge plasmas when the fast ion density is rather high. When the ablation due to fast ions is dominant and electron heat flux is negligible, the ablation rate is given by a scaling relation similar to that obtained in the case of electron heat flux only. – An example of an ablation rate profile is shown for a PDX tokamak-like plasma in a self-limiting approximation for electron temperature and density. The results are compared to those of the Milora model which includes fast ions.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox