Abstract We investigate the effect of primary ion diffusion charging on particle wall loss in Teflon smog chamber experiments. Primary ion losses are balanced between wall deposition and diffusion charging to larger particles; further, the particle charge distribution evolves toward a chamber-specific charge steady state, different from the so-called “neutralizer steady state” attained inside laboratory neutralizers. This chamber charge steady state depends on the particle size distribution, and the timescale to reach it is often hours. Applying conditions typical of chamber experiments, we conclude that primary ions play an important role in particle wall loss and should be taken into consideration when interpreting experiments. Copyright © 2020 American Association for Aerosol Research

中文翻译：

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烟雾室实验中的初级离子扩散充电和粒子壁损失

摘要 我们研究了初级离子扩散充电对聚四氟乙烯烟雾室实验中粒子壁损失的影响。一次离子损失在壁沉积和向较大颗粒扩散充电之间平衡；此外，粒子电荷分布趋向于特定于腔室的电荷稳态，这与实验室中和器内部获得的所谓“中和器稳态”不同。该腔室电荷稳定状态取决于颗粒尺寸分布，达到该状态的时间尺度通常为数小时。应用腔室实验的典型条件，我们得出结论，初级离子在粒子壁损失中起着重要作用，在解释实验时应予以考虑。版权所有 © 2020 美国气溶胶研究协会