2013 Fiscal Year Final Research Report

Experimental study of ion induced nucleation process by cosmic rays using ion beams from accelerator

Research Project

Project/Area Number	23540462
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Atomic/Molecular/Quantum electronics
Research Institution	University of Tsukuba
Principal Investigator	TOMITA Shigeo 筑波大学, 数理物質系, 准教授 (30375406)
Co-Investigator(Renkei-kenkyūsha)	NAKAI Yoichi 独立行政法人理化学研究所, 櫻井RI 物理研究室, 専任研究員 (30260194) KOBARA Hitomi 独立行政法人産業技術総合研究所, 環境管理技術研究部門, 研究員 (20344195) SASA Kimikazu 筑波大学, 数理物質系, 准教授 (20312796)
Project Period (FY)	2011 – 2013
Keywords	放射線
Research Abstract	Nucleation process of water droplet by cosmic rays have been draw attentions because of possible link between cosmic ray intensity and climate. We had studied water droplet formation in N2/H2O/SO2 using proton beam from accelerator. In this study, We use corona discharge instead of proton beam. Corona discharge produce only positively charged ions thus recombination process can be ignored. The density of generated water droplets was almost proportional to the amount of oxidation of SO2. The amount of produced particles are comparable with the case of proton beam. It seems that the oxidation of SO2 is important process for the nucleation of water droplets in both case.

(5 results)