Aerosol nucleation induced by a high energy particle beam

Aerosol nucleation induced by a high energy particle beam
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DOI:
10.1029/2011gl047036
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发表时间:
2011-05-12
影响因子:
5.2
通讯作者:
Svensmark, Henrik
Svensmark, Henrik
中科院分区:
地球科学1区
文献类型:
--
作者:
Enghoff, Martin B.;Pedersen, Jens Olaf Pepke;Svensmark, Henrik

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我们在一个大气压反应室中研究了硫酸气溶胶成核现象,利用580兆电子伏特的电子束使反应室的空间电离。我们发现离子诱导成核有明显作用,并认为这是在类似地球大气的条件下,首次利用粒子束对气溶胶成核的离子效应进行的明确观测。通过与使用伽马源电离进行比较,我们进一步表明,电离粒子的性质对于成核的离子诱导成分并不重要。这意味着可以使用廉价的电离源(而非昂贵的加速器束)来研究离子诱导成核。引用:恩霍夫(Enghoff),M. B.;佩德森(Pedersen),J. O. P.;乌格霍伊(Uggerhoj),U. I.;帕林(Paling),S. M.;斯文斯马克(Svensmark),H.(2011年),高能粒子束诱导的气溶胶成核,《地球物理学研究快报》,38卷,L09805,doi:10.1029/2011GL047036
We have studied sulfuric acid aerosol nucleation in an atmospheric pressure reaction chamber using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear contribution from ion-induced nucleation and consider this to be the first unambiguous observation of the ion-effect on aerosol nucleation using a particle beam under conditions that resemble the Earth's atmosphere. By comparison with ionization using a gamma source we further show that the nature of the ionizing particles is not important for the ion-induced component of the nucleation. This implies that inexpensive ionization sources - as opposed to expensive accelerator beams - can be used for investigations of ion-induced nucleation. Citation: Enghoff, M. B., J. O. P. Pedersen, U. I. Uggerhoj, S. M. Paling, and H. Svensmark (2011), Aerosol nucleation induced by a high energy particle beam, Geophys. Res. Lett., 38, L09805, doi:10.1029/2011GL047036.