| Project/Area Number |
02041053
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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 | Field Research |
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| Research Institution | Osaka University |
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Principal Investigator |
NAGASHIMA Yorikiyo Professor, Department of Physics, Faculty of Science, Osaka University, 理学部, 教授 (90044768)
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| Co-Investigator(Kenkyū-buntansha) |
TAKITA Masato Research Associate, Department of Physics, Faculty of Science, Osaka University, 理学部, 助手 (20202161)
HABA Junji Research Associate, Department of Physics, Faculty of Science, Osaka University, 理学部, 助手 (60180923)
SUGIMOTO Syoujirou Associate Professor, Department of Physics, Faculty of Science Osaka University, 理学部, 助教授 (20044753)
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| Project Period (FY) |
1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1990: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Scintillation Fiber / Tracking device / DSP (Digital Signal Processing) / マルチチャンネルプレ-ト |
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| Research Abstract |
In this program, we have investigated the forefront situation of the development on a scintillation fiber tracking system. A short summary of the present investigation are described below.
For the scintillation fibers as an tracking device, their diameter must be as small as 30mum. It was impossible by several years ago for a plastic fiber to achieve such a small diameter because the scintillation light could not be absorbed sufficiently in the single fiber and a serious cross-talktook place. Developed recently was a new WLS (Wave Length Shifter) which enables a plastic scintillation fiber to be a promising candidate for the elements of the Tracking device. The WLS named as PMP has such a large Stokes shift that both sufficient absorption of scintillation light and long attenuation length can be realized at the same time in 30mum fiber. According to the recent report (C. Angelini et al. NIM A295 (1990) 299), 30mum polystylene fiber doped with 1.5% (weight) PMP exhibits the photon yield of 9 photon/kev and the attenuation length of as long as 30cm.
For the construction of a realistic detector with a plastic scintillation fiber, the further investigation are required in the following points :
1) The individual fibers must be coated with an appropriate EMA (Extramural Absorber), which effectively restricts the passage of scintillation light from one fiber into another. The development of a new EMA compatible with the manufacturing process of fibers are necessary.
2) The device which can amplify, strobe and delay the optical image signal, must be developed.
3) Fast processing of the image data from CCD must be required for the final stage of the read-out system. This will become possible with the recent DSP (Digital Signal Processing) technique established in the industrial field.
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