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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Obtaining precise electron swarm parameters from a pulsed Townsend setup
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Obtaining precise electron swarm parameters from a pulsed Townsend setup

机译：通过脉冲Townsend设置获得精确的电子群参数

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摘要

A swarm parameter experiment is introduced, which implements the pulsed Townsend (PT) electrical method with a high degree of automatization. The experimental setup and measurement procedures are described in detail, and a comprehensive definition of the swarm model is given and used for signal analysis. The intrinsic parameters of electron drift currents in the PT method are identified, and novel regression methods are presented for obtaining electron swarm parameters from PT measurements. The setup and methods are verified with measurements in Ar, N _2 and CO _2, which are focused on the (E/N)-range between dominating electron attachment and weakly dominating ionization. The present data are compared with experimental reference data, and to electron transport coefficients calculated by a Boltzmann solver and simulated by a Monte Carlo method. Excellent agreement was found between the present data and the Monte Carlo results, but there are significant discrepancies to widely used recommended swarm parameters of N _2 and CO _2. Finally, it is proposed to revise some hitherto recommended values of electron transport coefficients.
机译：引入了群体参数实验，该实验以高度自动化的方式实现了脉冲Townsend（PT）电气方法。详细描述了实验设置和测量程序，并给出了群体模型的全面定义并将其用于信号分析。识别了PT方法中电子漂移电流的内在参数，并提出了新颖的回归方法来从PT测量中获得电子群参数。通过在Ar，N _2和CO _2中的测量验证了该设置和方法，这些测量集中在支配电子附着和弱支配电离之间的（E / N）范围内。将当前数据与实验参考数据进行比较，并与通过Boltzmann求解器计算并通过蒙特卡洛方法进行模拟的电子传输系数进行比较。在目前的数据和蒙特卡洛结果之间发现了极好的一致性，但是与广泛使用的推荐的N _2和CO _2群参数存在显着差异。最后，提出修改迄今为止推荐的一些电子传输系数的值。

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