Expression of longitudinal third-order transport coefficient in terms of α parameters and its validity
Expression of longitudinal third-order transport coefficient in terms of α parameters and its validity
复制标题
纵向三阶输运系数的α参数表达及其有效性
DOI：
10.1088/1361-6595/aad0dd
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发表时间：
2018
影响因子：
3.8
通讯作者：
Satoh K
中科院分区：
文献类型：
--
作者：
Kawaguchi S;Takahashi K;Satoh K
推导了电子连续方程中包含的纵向三阶输运系数ω_3与由电子群到达时间谱定义的α参数之间的关系。通过蒙特卡罗模拟计算了CH4和SF6气体中ω3和α参数的值，并将ω3的值与由ω参数计算的纵向三阶输运系数α‘3的值进行了比较，以验证所推导的关系式的正确性.ω‘3与ω3在CH4气体中小于500Td，在SF6气体中在150Td到700Td范围内的有效电离系数为零或很小的值吻合得很好。结果表明，利用双快门漂移管测量的到达时间谱可以实验获得ω-3的值。
The relation between the longitudinal third-order transport coefficient ω 3 contained in the continuity equation for electrons and α parameters defined by arrival-time spectra of an electron swarm is deduced. Values of ω 3 and the α parameters in CH 4 gas and SF 6 gas are calculated by Monte Carlo simulation, and then the values of ω 3 are compared with those of the longitudinal third-order transport coefficient ω'3 which are calculated from the α parameters to examine the validity of the deduced relation. The values of ω'3 are found to excellently agree with those of ω 3 below 500 Td in CH 4 gas and from 150 Td to 700 Td in SF 6 gas, where the values of the effective ionisation coefficient are nought or quite small. The results suggest that values of ω 3 can be obtained experimentally from arrival-time spectra measured by a double-shutter drift tube.