Influence of ion orbit width on onset threshold of neoclassical tearing modes
Influence of ion orbit width on onset threshold of neoclassical tearing modes
复制标题
离子轨道宽度对新古典撕裂模式起始阈值的影响
DOI：
10.1063/1.4934214
复制
发表时间：
2015-10-01
影响因子：
2.2
通讯作者：
Cao, Jintao
中科院分区：
文献类型：
--
作者：
Cai, Huishan;Li, Ding;Cao, Jintao
研究了有限离子轨道宽度下新经典撕裂模的起始阈值。解析地导出了包含离子轨道效应的新经典撕裂模的演化。当离子轨道宽度与岛宽度相当时，离子轨道的影响是显著的。这将增加岛中压力平坦化所需的岛宽度，并降低离子扰动自举电流的幅度。结果表明，对于给定的种子岛，离子轨道效应有增大起始阈值βθonset的趋势。它还将增加最低阈值βθ，min和相应的边缘岛宽度。这对国际热核聚变实验堆中具有可比离子轨道宽度和岛宽度的新经典撕裂模的产生具有重要意义。
The onset threshold of neoclassical tearing modes with finite ion orbit width is studied. The evolution of neoclassical tearing modes including the effect of ion orbit is derived analytically. When ion orbit width is comparable to island width, the effect of ion orbit is significant. It would increase the island width needed to flatten pressure in the island, and reduce the amplitude of ion perturbed bootstrap current. It is found that ion orbit effect tends to increase the onset threshold βθonset for a given seed island. It also would increase the lowest threshold βθ,min and the corresponding marginal island width. It has important implications for the onset of neoclassical tearing modes with comparable ion orbit width and island width in International Thermonuclear Experimental Reactor.