| Project/Area Number |
06452072
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
物理学一般
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
ENDO Ichita Hiroshima University, Faculty of Science, Professor, 理学部, 教授 (90033894)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAZATO Toshiharu Tohoku University, Faculty of Science, R.A., 理学部, 助手 (00172289)
TAKAHASHI Tohru Hiroshima University, Faculty of Science, R.A., 理学部, 助手 (50253050)
HORIGUCHI Takayoshi Hiroshima University, Faculty of Science, A.P., 理学部, 助教授 (40033899)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1995: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1994: ¥5,200,000 (Direct Cost: ¥5,200,000)
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| Keywords | parametric x ray / Resonant transition radiation / monochromatic x-ray source |
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| Research Abstract |
Various types of coherent x radiations from periaodic materials have benn known ; Parametric X-ray (PXR) , Channeling radiation, Resonant Transition Radiation, and have been studied in the former Soviet Union and other places. The present reasearch project have succeeded in accumulating systematic data which may enable us to understand the heretofore separately described radaiation phenomena in a more consistent way by making measurements under the conditions where two radiation phenomena can take place at the same time. Among the experimental consequences, the following points are to be underlined.
1. The two dimentional angular distribution of PXR was successfully observed for the first time. The results indicated that there is no dip at the central point of the distribution which is expected by our Incoherent Model but that the absolute intensity is appreciably higher than any theoretical calculation.
2. The effect of channeling is small at the electron energies 450 and 200MeV.
3. A rapid increase of x-ray intensity was observed when we increase the number of monocrystalline foils placed in an electron beam. In particular, a quadratic increase was observed for the X rays detected at the Bragg angle by using inclined multi foils.
The last phenomena found here may possibly used for developing an intense monochromaticd x-ray source. Further increase of X-ray intensity is expected for a special arrangement in which the electrons traversescrystalline multifoils many times.
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