| Project/Area Number |
05558055
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
プラズマ理工学
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| Research Institution | University of Tsukuba |
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Principal Investigator |
CHO Teruji Univ.Tsukuba, Institute of Physics, Associate Prof., 物理学系, 助教授 (80171958)
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| Co-Investigator(Kenkyū-buntansha) |
SAITOH Yutaka SII,Development of Semiconductor Processes, Head Researcher, 開発総括部・プロセス開発部, 課長
MAEZAWA Hideki National Institute of High Energy Physics, Photon Factory, Professor, 放射光実験施設, 教授 (40150015)
TANAKA Shigetoshi Fukui National College of Technology, President, Professor, 教授, 校長 (20025240)
KONDOH-HIRATA Mafumi Univ.Tsukuba, Plasma Research Center/Insti. Physics, Assistant Prof., プラズマ研究センタ/物理学系, 講師 (70222247)
YAMAGUCHI Naohiro Univ.Tsukuba, Plasma Research Center/Insti. Physics, Assistant Prof., プラズマ研究センタ/物理学系, 講師 (90158113)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥8,700,000 (Direct Cost: ¥8,700,000)
Fiscal Year 1994: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1993: ¥6,200,000 (Direct Cost: ¥6,200,000)
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| Keywords | Semiconductor X-ray Detector / X-ray Response Theory / Multilayr X-ray Detector / Plasma X-ray Diagnostics / Synchrotron Radiation Detection / Synchrotron Radiation Monitor / Multichannel X-ray Detector / X-ray Detector Array / 半導体検出器 / X線感度新理論 / 無電場基板領域 / 不純物濃度 / 拡散長 / 新型X線検出器 / プラズマ電子温度計測 / 国際研究協力 |
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| Research Abstract |
It is found that the dependence of the x-ray-energy response of semiconductor detectors on various detector parameters is consistently explained by our new theory ; this theory is characterized by a three-dimensional diffusion effect of x-ray produced charges on output signals.
This finding significantly modifies the evaluated values of plasma-electron temperatures Te deduced from the conventional theory in textbooks and the recent MIT theory. Our theory is extended so as to analyze multichannel semiconductor array data.
These results are successfully applied to fabricate upgraded high-energy-sensitive and low-noise x-ray detectors. These detectors are now installed in GAMMA 10 tandem mirror plasma confining device, and the significant high energy sensitive and low noise characteristic properties provide useful data including relativistic high electron-temperature observations as well as a few tens eV low-temperature electron measurements.
Our theory also provides a new idea of Te observations using only one plasma shot ; this idea comes from the use of the above-mentioned new x-ray detectors. The present investigations have lead to an international collaboration in tha fabrication and the characterization of x-ray detectors in the DIII-D tokamak device (U.S.A) as well.
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