An Implicit Monte Carlo Method for Simulation of Impurity Transport in Divertor Plasma
An Implicit Monte Carlo Method for Simulation of Impurity Transport in Divertor Plasma
复制标题
偏滤器等离子体中杂质输运模拟的隐式蒙特卡罗方法
DOI：
10.1006/jcph.1996.5600
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发表时间：
1997
影响因子：
4.1
通讯作者：
M. Ogasawara
中科院分区：
文献类型：
--
作者：
A. Suzuki;T. Takizuka;K. Shimizu;N. Hayashi;A. Hatayama;M. Ogasawara
发展了一种新的隐式蒙特卡罗（IMC）方法来模拟偏滤器等离子体中杂质离子的电离和复合过程。IMC方法考虑到许多电离和重组过程中的时间步长？t.时间步长不受条件限制，？是吗？? min（？min;原子过程的最小特征时间），这是常规Monte Carlo方法中被迫采用的。我们将这种方法纳入一维杂质输运模型。在该输运计算中，杂质离子以比常规方法中使用的时间步长大约10倍的时间步长进行跟踪。杂质的平均电荷态，？Z计算了偏滤器等离子体中电子温度T_e下的辐射冷却率L（T_e）。将这些结果与简单非冠状模型获得的结果进行了比较。
A new “implicit” Monte Carlo (IMC) method has been developed to simulate ionization and recombination processes of impurity ions in divertor plasmas. The IMC method takes into account many ionization and recombination processes during a time step ?t. The time step is not limited by a condition, ?t? ?min(?min; the minimum characteristic time of atomic processes), which is forced to be adopted in conventional Monte Carlo methods. We incorporate this method into a one-dimensional impurity transport model. In this transport calculation, impurity ions are followed with the time step about 10 times larger than that used in conventional methods. The average charge state of impurities, ?Z?, and the radiative cooling rate,L(Te), are calculated at the electron temperatureTein divertor plasmas. These results are compared with thosed obtained from the simple noncoronal model.