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Development of a semiconducting diamond for neutron imaging

Research Project

Project/Area Number 20K14776
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionShizuoka University

Principal Investigator

Masuzawa Tomoaki  静岡大学, 電子工学研究所, 講師 (40570289)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsダイヤモンド / 放射線センサ / 中性子 / ホウ素添加ダイヤモンド / 放射線検出器 / 界面物性 / 薄膜 / 中性子センサ / 補償ドーピング / 放射線 / 半導体物性評価 / ホウ素添加 / 半導体検出器
Outline of Research at the Start

本研究では,持ち運び可能な機材による中性子イメージングを実現するため,ダイヤモンドを用いた中性子センサを提案する.熱中性子を効率良く検出できるホウ素の中性子捕獲反応に着目し,ホウ素を高濃度に含む半導体ダイヤモンドを用いることで高感度化を図る.さらに,ホウ素と窒素の補償ドーピング技術を応用して高感度と低ノイズを同時に実現する.従来の結晶材料を用いるセンサと比べて大面積のフラットパネルセンサが可能となり,中性子イメージングを利用した医療検査や非破壊検査への展開が期待される.

Outline of Final Research Achievements

A diamond neutron detector that consists of neutron-capture layer and signal collection layer has been developed. Two of the research objectives have been achieved: demonstration of neutron detection using boron-doped diamond layer, as well as reduction of dark current in the detector by boron-nitrogen double doping.
Following three research goals have been achieved: (1)synthesis and characterization of functional diamond, (2)development of sensor fabrication process.(3)demonstration of neutron detection. In addition, a new operation model of neutron sensor that improves neutron sensitivity, has been newly discovered. Reduction of dark current in sensor has been realized by boron-nitrogen double doping.

Academic Significance and Societal Importance of the Research Achievements

本研究により,積層型ダイヤモンド中性子センサを試作し,中性子検出の実証に成功した.さらに,積層構造により,構想時の予想を超えてセンサの感度を向上できる新しい動作モデルを見出した.
中性子センサの高感度化により可搬型中性子イメージングが実現すれば,中性子捕獲療法の際の人体被曝量モニタリングや,金属ケース内の爆薬などの検出が容易になり,社会の安全・安心を支える基盤技術となる非破壊検査技術が実現できる.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Characterization of diamond radiation detector with B-doped/undoped stacked structure2023

    • Author(s)
      T. Masuzawa, T. Miyake, H. Nakagawa, T. Nakano, K. Takagi, T. Aoki, H. Mimura, T. Yamada
    • Journal Title

      Diamond and Related Materials

      Volume: 136 Pages: 109985-109985

    • DOI

      10.1016/j.diamond.2023.109985

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Diamond Radiation Detector with Built‐In Boron‐Doped Neutron Converter Layer2021

    • Author(s)
      Miyake Taku、Nakagawa Hisaya、Masuzawa Tomoaki、Yamada Takatoshi、Nakano Takayuki、Takagi Katsuyuki、Aoki Toru、Mimura Hidenori
    • Journal Title

      physica status solidi (a)

      Volume: 219 Issue: 3 Pages: 2100315-2100315

    • DOI

      10.1002/pssa.202100315

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 薄膜・表面物性と検出器開発2022

    • Author(s)
      増澤智昭
    • Organizer
      令和4年度次世代光電子分光研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Radiation Detector Made of Polycrystalline Diamond with Boron-doped Layer for Neutron Conversion2022

    • Author(s)
      Taku Miyake, Hisaya Nakagawa, Tomoaki Masuzawa, Takatoshi Yamada, Takayuki Nakano, Katsuyuki Takagi, Toru Aoki, Hidenori Mimura
    • Organizer
      15th International Conference on New Diamond and Nano Carbons (NDNC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 多結晶ダイヤモンド放射線検出器のキャリア輸送特性評価2022

    • Author(s)
      増澤智昭、三宅拓、中川央也、中野貴之、都木克之、青木徹、三村秀典、山田貴壽
    • Organizer
      2022第36回ダイヤモンドシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 多結晶ダイヤモンドへのアルファ線照射による信号評価2022

    • Author(s)
      増澤智昭、三宅拓、山田貴壽、中野貴之、都木克之、青木徹、三村秀典
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Diamond radiation detector with built-in boron-doped neutron converter layer2021

    • Author(s)
      T. Miyake, H. Nakagawa, T. Masuzawa, T. Yamada, T. Nakano, K. Takagi, T. Aoki, H. Mimura
    • Organizer
      The 19th International Conference on Global Research and Education (inter-Academia 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characterization of B-doped polycrystalline diamond for radiation detection2021

    • Author(s)
      T. Miyake, T. Masuzawa, H. Nakagawa, T. Yamada, T. Nakano, T. Aoki, H. Mimura
    • Organizer
      14th International Conference on New Diamond and Nano Carbons (NDNC2020/2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイヤモンドへのホウ素・窒素補償ドーピング2021

    • Author(s)
      三宅拓,中川央也,三村秀典,増澤智昭
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 赤外レーザーによるオーミック型CdTe放射線検出器のキャリア輸送特性の経時変化測定2021

    • Author(s)
      岡賢治,中川央也,増澤智昭,青木徹,伊藤哲
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 多結晶ダイヤモンド薄膜を用いた放射線測定2020

    • Author(s)
      三宅 拓、中川 央也、増澤 智昭、中野 貴之、青木 徹、三村 秀典
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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