| Project/Area Number |
17540465
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | University of Tsukuba |
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Principal Investigator |
HIRATA Mafumi University of Tsukuba, Graduate School of Pure and Applied Sciences, Assistant Professor, 大学院数理物質科学研究科, 講師 (70222247)
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| Co-Investigator(Kenkyū-buntansha) |
CHO Teruji University of Tsukuba, Graduate School of Pure and Applied Sciences, Professor, 大学院数理物質科学研究科, 教授 (80171958)
KOHAGURA Junko University of Tsukuba, Graduate School of Pure and Applied Sciences, Assistant Professor, 大学院数理物質科学研究科, 講師 (60302345)
NAKASHIMA Yousuke University of Tsukuba, Graduate School of Pure and Applied Sciences, Associate Professor, 大学院数理物質科学研究科, 助教授 (00188939)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2005: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | Tandem Mirror Plasma / Fusion / Potential Formation / Semiconductor Ion Detector / End-Loss Currents / Ion Diagnostics / Electron Diagnostics / Plasma Confinement |
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| Research Abstract |
For the purpose of observations of the space profile on absolute values of ion-and electron-end-loss currents for plasma confinement studies in open-field plasma devices, a compact-sized electrostatic end-loss-current detector array is proposed on the basis of a self-collection principle for suppressing the effects of secondary-electron emission from a metal collector. For employing this specific method, it is worth noting that no further additional magnetic systems except the ambient open-ended magnetic fields are required for the detector structure. This characteristic property provides a compactness of the total detection system and availability for its use in plasma confinement devices without disturbing plasma-confining magnetic fields. The detector consists of a set of parallel metal plates with respect to lines of ambient magnetic forces of a plasma device for analyzing incident ion currents along with a grid for shielding the collector against strays due to the metal-plate biasing. The characterization experiments are carried out by the use of a test-ion-beam line along with an additional use of a Helmholtz coil system for the formation of open magnetic fields similar to those in the GAMMA10 end region. Availability of the detector is clearly demonstrated in the GAMMA10 plasma experiments.
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