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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 TypeMulti-year Fund
Section一般
Research Field Atomic/Molecular/Quantum electronics
Research InstitutionUniversity 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
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords放射線 / 液滴生成 / 宇宙線 / エアロゾル / イオン誘起核生成
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.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (9 results)

All 2014 2013 2012 Other

All Presentation (8 results) Remarks (1 results)

  • [Presentation] Oxidation of SO_2 and Water Droplet Formation in N_2/H_2O/SO_2 and Air/H_2O/SO_2 by Irradiation of 20 MeV protons2014

    • Author(s)
      冨田成夫
    • Organizer
      宇宙気候研究会
    • Place of Presentation
      名古屋
    • Year and Date
      2014-04-03
    • Related Report
      2013 Final Research Report
  • [Presentation] Oxidation of So2 and Water Droplet Formation in N2/H2O/SO2 and Air/H2O/SO2 by Irradiation of 20MeV Protons2014

    • Author(s)
      冨田成夫
    • Organizer
      宇宙気候研究会
    • Place of Presentation
      名古屋
    • Related Report
      2013 Annual Research Report
  • [Presentation] 宇宙線と地球環境 -宇宙線による大気化学-2013

    • Author(s)
      冨田成夫
    • Organizer
      工学研究所附属量子理工学研究センター 第14回公開シンポジウム
    • Place of Presentation
      京都
    • Year and Date
      2013-10-19
    • Related Report
      2013 Final Research Report
  • [Presentation] N_2/H_2O/SO_2 中での20MeV陽子線による液滴生成量とSO_2消費量との関係2013

    • Author(s)
      冨田成夫
    • Organizer
      宇宙線による雲核生成機構の解明 -ラボ実験とフィールド観測からのアプローチ
    • Place of Presentation
      名古屋
    • Year and Date
      2013-07-12
    • Related Report
      2013 Final Research Report
  • [Presentation] N2/H2O/SO2中での20MeV陽子線による液滴生成量とSO2消費量との関係2013

    • Author(s)
      冨田成夫
    • Organizer
      宇宙線による雲核生成機構の解明 -ラボ実験とフィールド観測からのアプローチ-
    • Place of Presentation
      名古屋
    • Related Report
      2013 Annual Research Report
  • [Presentation] 宇宙線と地球環境 -宇宙線による大気化学-2013

    • Author(s)
      冨田成夫
    • Organizer
      工学研究所附属量子理工学教育研究センター第14回公開シンポジウム
    • Place of Presentation
      京都
    • Related Report
      2013 Annual Research Report
  • [Presentation] Correlation between Consumption of SO_2 and Nucleation Rate in N_2/H_2O/SO_2 by Irradiation of 20 MeV protons2012

    • Author(s)
      Shigeo Tomita
    • Organizer
      The 2nd Nagoya Workshop on the Relationship between Solar Activity and Climate Changes
    • Place of Presentation
      Nagoya, Japan
    • Related Report
      2013 Final Research Report
  • [Presentation] Correlation between Consumption of SO2 and Nucleation Rate in N2/H2O/SO2 by Irradiation of 20 MeV Protons2012

    • Author(s)
      Shigeo Tomita
    • Organizer
      The 2nd Nagoya Workshop on the Relationship between Solar Activity and Climate Changes, 2012 Jan 15-16, Nagoya, Japan
    • Place of Presentation
      Noyori Conference Hall, Nagoya University (Nagoya, Japan)
    • Related Report
      2011 Research-status Report
  • [Remarks]

    • URL

      http://ilab.bk.tsukuba.ac.jp/

    • Related Report
      2013 Final Research Report

URL: 

Published: 2011-08-05   Modified: 2019-07-29  

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