Comparison of theoretical models for scrape-off layer widths with data from COMPASS-D, JET and Alcator C-Mod
Comparison of theoretical models for scrape-off layer widths with data from COMPASS-D, JET and Alcator C-Mod
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DOI：
10.1088/0029-5515/39/2/304
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发表时间：
1999-02
期刊：
影响因子：
3.3
通讯作者：
J.W Connor;G. Counsell;S. Erents;S.J Fielding;B. LaBombard;K. Morel
中科院分区：
文献类型：
--
作者：
J.W Connor;G. Counsell;S. Erents;S.J Fielding;B. LaBombard;K. Morel
总结了一些理论模型的特点，提出了解释跨场传输的SOL。在SOL中，平行于和垂直于磁场的输运的简单平衡允许从这些模型中推导出SOL宽度Δ与等离子体参数在无碰撞和碰撞SOL两种情况下的幂律缩放的预测。然后使用COMPASS-D的无碰撞SOL和JET和Alcator C-Mod的碰撞SOL的SOL宽度数据来测试这些模型。值得注意的是，来自COMPASS-D、JET和Alcator C-Mod的数据都支持这些模型中的同一个小子集。此外，交叉场热扩散率的理论模型与SOL数据从JET和Alcator C-Mod的直接比较提供了一些支持这一发现。这些“最佳模型”可用于对MAST、卡勒姆科学中心的球形托卡马克和ITER进行预测。
The features of a number of theoretical models proposed to explain the cross-field transport in the SOL are summarized. Simple balances of transport parallel and perpendicular to the magnetic field in the SOL allow the derivation of predictions from these models for the power law scalings of the SOL width Δ with the plasma parameters in the two cases of a collisionless and a collisional SOL. Data on the SOL widths for a collisionless SOL from COMPASS-D and for a collisional SOL from JET and Alcator C-Mod are then used to test these models. Remarkably, the data from COMPASS-D, JET and Alcator C-Mod all favour the same small subset of these models. Furthermore, direct comparisons of the theoretical models for the cross-field thermal diffusivities with SOL data from JET and Alcator C-Mod provide some support for this finding. These `best models' can be used to make predictions for MAST, the spherical tokamak at Culham Science Centre, and for ITER.