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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Transport properties of SF_6 in SF_6—Ne, SF_6—N_2 and SF_6-0_2 mixtures
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Transport properties of SF_6 in SF_6—Ne, SF_6—N_2 and SF_6-0_2 mixtures

机译：SF_6-Ne，SF_6-N_2和SF_6-0_2混合物中SF_6的传输性质

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摘要

The mobility of SF_6~- has been calculated for the gas mixtures SF_6-Ne, SF_6-N_2 and SF_6-0_2 using an optimized Monte Carlo code for the ion transport simulation in a drift tube. The elastic momentum transfer collision cross sections needed for the calculation were determined from a semi-classical JWKB approximation, while the inelastic ones (detachment, dissociative charge transfer and SF_6 conversion to SF_5 and F-) were taken from the literature for the case of the SF_6-/Ne collision system. The resulting sets of collision cross sections were validated by comparing the SF_6 calculated mobilities with those measured in the above mixtures with a time-resolved pulsed Townsend technique. The SF_6 longitudinal and transverse density-normalized diffusion coefficients were calculated for these mixtures for the case where the share of SF_6 in the mixture was 50% . Finally, the validity of Blanc's law was discussed at low and high electric fields, whereby we show that it fails at high fields, where inelastic processes are dominant.
机译：已使用优化的蒙特卡洛代码对漂移管中的离子迁移进行了模拟，计算出了混合气体SF_6-Ne，SF_6-N_2和SF_6-0_2的SF_6-迁移率。计算所需的弹性动量传递碰撞截面由半经典的JWKB近似确定，而非弹性的动量传递碰撞截面（脱离，离解电荷传递以及SF_6转换为SF_5和F-）是从文献中得出的。 SF_6- / Ne碰撞系统。通过使用时间分辨脉冲Townsend技术将SF_6计算出的迁移率与上述混合物中测得的迁移率进行比较，验证了所得的碰撞截面集。在混合物中SF_6的份额为50％的情况下，计算了这些混合物的SF_6纵向和横向密度归一化扩散系数。最后，在低电场和高电场下讨论了布兰克定律的有效性，由此表明在非弹性过程占主导的高电场下，布兰克定律会失效。

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