The role of neutrals in high-mode (H-mode) pedestal formation
The role of neutrals in high-mode (H-mode) pedestal formation
复制标题
中性粒子在高模（H 模）基座形成中的作用
DOI：
10.1063/1.1462032
复制
发表时间：
2002
影响因子：
2.2
通讯作者：
L. Owen
中科院分区：
文献类型：
--
作者：
R. Groebner;M. Mahdavi;A. Leonard;T. Osborne;G. Porter;R. Colchin;L. Owen
由电子密度和中性氘密度耦合连续性方程导出的解析模型与DIII-D托卡马克边缘电子密度剖面的许多特征相一致[J. L. Luxon等人，等离子体物理学和受控聚变研究，1986年，第一卷（国际原子能机构，维也纳，1987年），第159页]。对于一个假设的恒定的粒子扩散系数，该模型表明，粒子运输和中性燃料产生的电子和中性密度分布，具有相同的特征尺度长度在等离子体边缘。对于高模式（H-模式）放电中的密度的系统变化，该模型预测，电子密度传输势垒的宽度减小，最大梯度增加，如在实验中观察到的。从模型计算的宽度同意定量与实验宽度的条件下，该模型是有效的。这些结果支持模型的传输势垒的形成，其中H-模式粒子阻挡…
An analytic model, derived from coupled continuity equations for the electron and neutral deuterium densities, is consistent with many features of edge electron density profiles in the DIII-D tokamak [J. L. Luxon et al., Plasma Physics and Controlled Fusion Research, 1986, Vol. I (International Atomic Energy Agency, Vienna, 1987), p. 159]. For an assumed constant particle diffusion coefficient, the model shows that particle transport and neutral fueling produce electron and neutral density profiles that have the same characteristic scale lengths at the plasma edge. For systematic variations of density in high-mode (H-mode) discharges, the model predicts that the width of the electron density transport barrier decreases and the maximum gradient increases, as observed in the experiments. The widths computed from the model agree quantitatively with the experimental widths for conditions in which the model is valid. These results support models of transport barrier formation in which the H-mode particle barri...