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Evaluation of the performance of a soft X-ray charger for the bipolar charging of nanoparticles
Institution:1. Department of Integrated Environmental Systems, Pyeongtaek University, 3825 Seodongdae-ro, Pyeongtaek-Shi, Gyeonggi-do 450-701, Republic of Korea;2. GreenSolus Co., #804, Byoksan Digital Valley 3-Cha, 271 Digital-ro, Guro-gu, Seoul 152-775, Republic of Korea;3. Global Frontier Center for Multiscale Energy Systems, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Republic of Korea;1. Tokyo Dylec Corp., Naito-cho Building, 1 Naito-machi, Shinjuku, Tokyo 161-0014, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan;1. Engine Research Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India;2. Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India;1. Centre for Atmosphere Watch and Services, Meteorological Observation Centre of China Meteorological Administration, Beijing, China;2. Key Laboratory of Regional Climate-Environment for East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;3. South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China;4. Key Laboratory of Atmospheric Chemistry, Centre for Atmosphere Watch and Services, Chinese Academy of Meteorological Sciences, Beijing, China;5. Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;6. Air Quality Research Division, Science and Technology Branch, Environment Canada, Toronto, Canada;1. Department of Energy Technology, Lappeenranta University of Technology, FI-53851 Lappeenranta, Finland;2. VTT Technical Research Centre of Finland, FI-02044 VTT, Finland;1. Department of Chemical Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8527, Japan;2. Department of Chemical and Materials Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Taoyuan City 33302, Taiwan;3. Department of Otolaryngology-Head & Neck Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan City 33305, Taiwan
Abstract:The use of soft X-rays in a neutralizer represents an alternative technique that could replace conventional radioactive sources. In this study, we evaluated the charging characteristics of a soft X-ray aerosol neutralizer. In addition, the results from the evaluation of the soft X-ray charger were compared with results obtained using a neutralizer incorporating an 241Am radioactive source. The tandem differential mobility analyzer technique was used previously to determine the size-dependent positive, negative, and neutral charge fractions of a soft X-ray neutralizer. This technique was used to show that the neutral fractions obtained using the soft X-ray charger agreed well with the predictions of bipolar diffusion charging theory, and that the soft X-ray charger could be used as a neutralizer for a scanning mobility particle sizer system.
Keywords:Soft X-ray  Neutralizer  Bipolar charger  Nanoparticle  TDMA
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