| Project/Area Number |
63044076
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | Kyoto University |
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Principal Investigator |
TAKAHASHI Kanji Institute of Atomic Energy, Kyoto University, Professor, 原子エネルギー研究所, 教授 (40027123)
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| Co-Investigator(Kenkyū-buntansha) |
HITZENBERGER Regina Institute for Experimental Physics, University of Vienna, Assist. Professor, 実験物理学科, 助教授
REISCHE G.P. ウィーン大学, 実験物理学科, 助教授
WAGNER Paul E. Institute for Experimental Physics, University of Vienna, Assoc. Professor, 実験物理学科, 準教授
PREINING Othmar Institute for Experimental Physics, University of Vienna, Professor, 実験物理学科, 教授
TOHNO Susumu Institute of Atomic Energy, Kyoto University, Instructor, 原子エネルギー研究所, 助手 (80135607)
ITOH Masayuki Institute of Atomic Energy, Kyoto University, Instructor, 原子エネルギー研究所, 助手 (80109066)
KASAHARA Mikio Institute of Atomic Energy, Kyoto University, Assoc. Professor, 原子エネルギー研究所, 助教授 (80027143)
REISCHL Georg P. Institute for Experimental Physics, University of Vienna, Assist. Professor
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1990: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1989: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1988: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Fine aerosol particles / Particle production / Particle measurement / Particle dynamics / Atmospheric aerosols |
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| Research Abstract |
Comprehensive studies were carried out jointly on various items involved in further advancement of aerosol research, and the main topics are summarized as follows ;
1. Production of fine particles
As for the theoretical study of nucleation processes from gaseous matter, there still remain essential unsolved problems such as the sticking probability of gas molecules, as well as the improvement in experimental techniques. Production of homogeneous sized fine particles is one of the essential requirement for industrial use of fine particles, and the combined techniques developed in items 2) and 3) will be useful method for further research.
2. Dynamics of particles
A quadrupole cell was successfully utilized for levitating a single particle in a cell, and this technique is expected to be extremely useful for basic experimental research of aerosols such as sizing, physical and physico-chemical characterization and dynamics study of particles. Further technical ements will be needed to extend i
… More
ts applicability to more wider size range of particles. Some peculiar behaviors were observed for light-absorbing particles under the irradiation of laser beam. Particle heating and dynamics of heated particles are thought of special importance to elucidate these phenomena.
3. Measurement of particles
Application of light scattering techniques to sizing of aerosol particles was studied comprehensively. Angular scattering measurement in combination with Kelvin cell dynamic light scattering (photon correlation spectroscopy, PCS) were confirmed to be most useful for in-situ measurement of fine particles. Further improvement is still required for data inversion technique used in PCS.
4. Atmospheric aerosols
Particle induced X-ray Emission (PIXE) method was studied applied to elemental analysis of airborne particulates sampled at the areas of Uji, Osaka and Vienna, and the local features are now being examined. Further joint works will be continued with this item. Another important topic discussed during this joint work was the contribution of atmospheric aerosols to the global climate, and a continuing joint research program is now under consideration. Less
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