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Development of a Novel Ion-Current Semiconductor Detector for Distinguishing Incident Ions and Electrons

Research Project

Project/Area Number 14580512
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionUniversity of Tsukuba

Principal Investigator

HIRATA Mafumi  University of Tsukuba, Institute of Physics, Assistant Professor, 物理学系, 講師 (70222247)

Co-Investigator(Kenkyū-buntansha) NAKASHIMA Yousuke  University of Tsukuba, Institute of Physics, Associate Professor, 物理学系, 助教授 (00188939)
KOHAGURA Junko  University of Tsukuba, Institute of Physics, Assistant Professor, 物理学系, 講師 (60302345)
CHO Teruji  University of Tsukuba, Institute of Physics, Professor, 物理学系, 教授 (80171958)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2002: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsTandem Mirror Plasma / Potential Confinement / Potential Formation Mechanisms / Semiconductor ion Detector / Semiconductor Response Theory / End-Loss Ion Currents / Ion Diagnostics / Plasma Confining Potential / プラズマ計測 / 半導体表面薄膜成膜法 / イオンエネルギースペクトル計測器
Research Abstract

For the purpose of end-loss-ion energy analyzes in open-field plasmas, a newly developed electrostatic ion-energy spectrometer is proposed on the basis of a "self-collection" principle for secondary electron emission from a metal collector. The ion-energy spectrometer is designed with multiple grids for analyzing incident ion energies, and a set of parallelized placed metal plates with respect to lines of ambient magnetic forces in an open-ended device. One of the most important characteristic properties of this spectrometer is the use of our proposed principle of a "self-collection" mechanism due to E×B drifts for secondary electrons emitted from the grounded metal-plate collector by the use of no further additional magnetic systems except the ambient open-ended fields B. The proof-of-principle and 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 GAMMA 10 end region. The applications of the developed ion-energy spectrometer for end-loss-ion diagnostics in the GAMMA 10 plasma experiments are demonstrated under the conditions with simultaneous incidence of energetic electrons produced by electron-cyclotron heatings for end-loss-plugging potential formation, since these electrons have contributed to disturb these ion signals from conventional end-loss-ion detectors.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] M.Hirata et al.: "A Novel Electrostatic Ion-Current Absolute-Value Detector under Circumstances with Simultaneous Electron Incidence by the Use of a Proposed "Self-Collection" Method for Secondary Electron Emission"Transactions of Fusion Science and Technology. Vol.43. 262-264 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Yoshida et al.: "Relation of the Spatial Profile of Ion Confining Potentials with the Improvement in Plasma Confinement Using Novel Ion-Energy Spectrometer Arrays in GAMMA 10"Transactions of Fusion Science and Technology. vol.43. 289-291 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Hirata et al.: "A novel electrostatic ion-energy spectrometer by the use of a proposed "self-collection" method for secondary-electron emission from a metal collector"Review of Scientific Instruments. Vol.74. 1913-1916 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Yoshida et al.: "Spatial Profile Measurements of Ion-Confining Potentials Using Novel Position-Sensitive Ion-Energy Spectrometer Arrays"Nuclear Instruments and Methods in Physics Research A. Vol.513. 99-102 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Cho et al.: "Extended Consolidation of Scaling Laws of Potential Formation and Effects Covering the Representative Tandem Mirror Operations in GAMMA 10"Nuclear Fusion. Vol.43. 293-298 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Cho et al.: "Sheared Radial Electric-Field Effects on Turbulence Suppression due to Doubly Advanced Potential-Height Formation"Journal of Plasma and Fusion Research. Vol.80. 81-82 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Hirata et al.: "A Novel Electrostatic Ion-Current Absolute-Value Detector under Circumstances with Simultaneous Electron Incidence by the Use of a Proposed "Self-Collection" Method for Secondary Electron Emission"Transactions of Fusion Science and Technology. Vol.43. 262-264 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Yoshida et al.: "Relation of the Spatial Profile of Ion Confining Potentials with the Improvement in Plasma Confinement Using Novel Ion-Energy Spectrometer Arrays in GAMMA 10"Transactions of Fusion Science and Technology. Vol.43. 289-291 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Hirata et al.: "A novel electrostatic ion-energy spectrometer by the use of a proposed "self-collection" method for secondary-electron emission from a metal collector"Review of Scientific Instruments. Vol.74. 1913-1916 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Yoshida et al.: "Spatial Profile Measurements of Ion-Confining Potentials Using Novel Position-Sensitive Ion-Energy Spectrometer Arrays"Nuclear Instruments and Methods in Physics Research A. Vol.513. 99-102 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Cho et al.: "Extended Consolidation of Scaling Laws of Potential Formation and Effects Covering the Representative Tandem Mirror Operations in GAMMA 10"Nuclear Fusion. Vol.43. 293-298 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Cho et al.: "Sheared Radial Electric-Field Effects on Turbulence Suppression due to Doubly Advanced Potential-Height Formation"Journal of Plasma and Fusion Research. Vol.80. 81-82 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.Hirata et al.: "A Novel Electrostatic Ion-Current Absolute-Value Detector under Circumstances with Simultaneous Electron Incidence by the Use of a Proposed "Self-Collection" Method for Secondary Electron Emission"Transactions of Fusion Science and Technology. Vol.43, No.1T. 262-264 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Yoshida et al.: "Relation of the Spatial Profile of Ion Confining Potentials with the Improvement in Plasma Confinement Using Novel Ion-Energy Spectrometer Arrays in GAMMA 10"Transactions of Fusion Science and Technology. Vol.43, No.1T. 289-291 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Hirata et al.: "A novel electrostatic ion-energy spectrometer by the use of a proposed "self-collection" method for secondary-electron emission from a metal collector"Review of Scientific Instruments. Vol.74, No.3. 1913-1916 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Yoshida et al.: "Spatial Profile Measurements of Ion-Confining Potentials Using Novel Position-Sensitive Ion-Energy Spectrometer Arrays"Nuclear Instruments and Methods in Physics Research A. Vol.513. 99-102 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Cho et al.: "Extended Consolidation of Scaling Laws of Potential Formation and Effects Covering the Representative Tandem Mirror Operations in GAMMA 10"Nuclear Fusion. Vol.43, No.5. 293-298 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Cho et al.: "Sheared Radial Electric-Field Effects on Turbulence Suppression due to Doubly Advanced Potential-Height Formation"Journal of Plasma and Fusion Research. Vol.80, No.2. 81-82 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Hirata et al.: "A Novel Electrostatic Ion-Current Absolute-Value Detector under Circumstances with Simultaneous Electron Incidence by the Use of a Proposed "Self-Collection" Method for Secondary Electron Emission"Transactions of Fusion Science and Technology. Vol.43, No.1T. 262-264 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Yoshida et al.: "Relation of the Spatial Profile of Ion Confining Potentials with the Improvement in Plasma Confinement Using Novel Ion-Energy Spectrometer Arrays in GAMMA 10"Transactions of Fusion Science and Technology. Vol.43, No.1T. 289-291 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Hirata et al.: "A novel electrostatic ion-energy spectrometer by the use of a proposed "self-collection" method for secondary-electron emission from a metal collector"Review of Scientific Instruments. Vol.74, No.3. 1913-1916 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Yoshida et al.: "Observations of differences in the spatial-profile symmetry-of ion-confining potentials in the cases with and without the central-cell density increase during an ion-plugging period"Nuclear Fusion. Vol.74, No.3. 1909-1912 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Cho et al.: "A Novel Method for Simultaneous Observations of Plasma Ion and Electron Temperatures Using a Semiconductor Detector Array"Nuclear Instruments and Methods in Physics Research A. Vol.477. 204-209 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Hirata et al.: "Tomographic Reconstruction of Plasma Electron Temperature Profiles Using Semiconductor Detector Arrays in the Elliptic Transition Region and the Circular Central Cell of the GAMMA 10 Tandem Mirror"Nuclear Instruments and Methods in Physics Research A. Vol.477. 210-214 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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