Abstract—

The results of experiments in the Large Aerosol Chamber of RPA Typhoon revealed the appearance of new aerosol particles larger than 15 nm in an aerosol-free volume of atmospheric air isolated from the external environment in darkness 20 min after the air purification. The generation of new particles is associated with the possible presence of precursor gases in the atmospheric air, which, under the influence of cosmic rays penetrating into the chamber, turn into aerosols. The experimentally observed evolution (over several days) of the size spectrum of the resulting particles shows that the generation of new aerosol particles lasts no more than 20 hours. During the evolution, the particles become larger and reach more than 100 nm size. After repeated purification of the air inside the chamber with the removal of newly generated aerosols, no new particles were detected for 10 days.

中文翻译：

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新气溶胶颗粒的产生及其在大气中的演化：RPA台风大型气溶胶室的实验结果

摘要-

RPA台风大型气溶胶室的实验结果显示，空气净化后20分钟，在黑暗中与外部环境隔离的无气溶胶体积的大气中出现了大于15纳米的新气溶胶颗粒。新粒子的产生与大气中可能存在的前体气体有关，这些前体气体在穿透进入室的宇宙射线的影响下变成气溶胶。实验观察到的所得颗粒尺寸谱的演变（几天内）表明，新气溶胶颗粒的产生持续不超过 20 小时。在演化过程中，颗粒变得更大并达到超过 100 nm 的尺寸。经过反复净化室内空气并去除新产生的气溶胶后，10天没有检测到新的颗粒物。