Computer simulation study of correspondence between experimental and theoretical electron drift velocities in CH4 gas
Computer simulation study of correspondence between experimental and theoretical electron drift velocities in CH4 gas
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CH4气体中电子漂移速度实验与理论对应关系的计算机模拟研究
DOI：
10.1088/0022-3727/24/8/018
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
H. Tagashira
中科院分区：
文献类型：
--
作者：
K. Satoh;Y. Ohmori;Y. Sakai;H. Tagashira
由Schlumbohm（1965）和Frommhold（1959）实验确定的CH4气体的电子漂移速度，其中将漂移速度由间隙长度除以电子运输时间的间隙与理论漂移速度（例如扩散 - 扩散 - - 扩散速度）进行了比较。稳态汤森的修改漂移速度VD，电子的平均漂移速度WV的平均漂移速度脉动汤森（Townsend），质量漂移速度WR和均值的时间漂移速度WM的飞行时间实验，当时电离是可观的。结果表明，通过schlumbohm和Frommhold的实验推导的漂移速度不与任何理论电子漂移速度一致，并表明Frofmhold实验的漂移速度与以（WR+WM）为代表的电子漂移速度一致。 /2，而Schlumbohm实验的漂移速度的假设接近，但略大于Wm。
Electron drift velocities for CH4 gas determined by Monte Carlo simulations of Schlumbohm's (1965) and Frommhold's (1959) experiments, in which drift velocity is defined by the gap length divided by electron transit time, are compared with theoretical drift velocities such as the diffusion-modified drift velocity Vd of the steady-state Townsend, the average drift velocity of electrons Wv of the pulsed Townsend, the centre-of-mass drift velocity Wr and mean-arrival-time drift velocity Wm of the time-of-flight experiments when ionization is appreciable. The results show that the drift velocities deduced by the simulation of Schlumbohm's and Frommhold's experiments do not agree with any of the theoretical electron drift velocities, and suggest that the drift velocity from Frommhold's experiment coincides with an electron drift velocity represented by (Wr+Wm)/2, while the drift velocity from Schlumbohm's experiment assumes a value close to but slightly larger than Wm.