エアロゾル電荷中和器の試験・校正設備の構築とアメリシウム中和器への適用例 Construction of a Test and Calibration Station for the Aerosol Charge Neutralizer and an Example of Evaluation of an Americium Neutralizer

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著者

    • 佐藤 佳宏 SATO Yoshihiro
    • 独立行政法人産業技術総合研究所計測標準研究部門 National Institute of Advanced Industrial Science and Technology (AIST)
    • 桜井 博 SAKURAI Hiromu
    • 独立行政法人産業技術総合研究所計測標準研究部門 National Institute of Advanced Industrial Science and Technology (AIST)
    • 榎原 研正 EHARA Kensei
    • 独立行政法人産業技術総合研究所計測標準研究部門 National Institute of Advanced Industrial Science and Technology (AIST)

抄録

The aerosol charge neutralizer is an essential device in size distribution measurement of aerosol particles by the differential mobility analyzer (DMA). It is not a common practice to calibrate neutralizers, and charged fractions of particles that passed through an aerosol charge neutralizer are assumed to follow a theoretical distribution, which is represented by the approximate equations by Wiedensohler (1988). This assumption, however, would cause significant error if the actual charged fractions deviated from theory. It is not an easy task, though, to calibrate neutralizers for many users. As part of an effort to provide calibration standards for aerosol particle measurements, we have been building an experiment station for calibration of aerosol charge neutralizers. This paper reports its construction and the method to derive particle size-dependent charged fractions. We also report measurement results of charged fractions of an Am-241 neutralizer at different flow rates, in which the location of the radiation source could be varied. We observed that, at a low flow rate, charged fractions varied when the location of the ion source was changed and deviated from theory as the radiation source was moved toward upstream while all other conditions were maintained unchanged. This indicates that the performance of neutralizers may be influenced by the exact location of the ion source in the housing, especially under low flow-rate conditions.

収録刊行物

  • エアロゾル研究 = Journal of aerosol research  

    エアロゾル研究 = Journal of aerosol research 22(4), 302-309, 2007-12-20 

    日本エアロゾル学会

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各種コード

  • NII論文ID(NAID)
    10021918771
  • NII書誌ID(NCID)
    AN10041511
  • 本文言語コード
    JPN
  • 資料種別
    REV
  • ISSN
    09122834
  • NDL 記事登録ID
    9320887
  • NDL 雑誌分類
    ZP5(科学技術--化学・化学工業--化学工学)
  • NDL 請求記号
    Z17-1062
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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