Development of radiation detectors based on crystal growth of CVD single diamond combined with a lift-off method

2012 Fiscal Year Final Research Report

• Project/Area Number: 22360395
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Hokkaido University
• Principal Investigator: KANEKO Junichi 北海道大学, 大学院・工学研究院, 准教授 (90333624)
• Co-Investigator(Renkei-kenkyūsha): FUJITA Fumiyuki 北海道大学, 大学院・工学研究院, 助教 (10002312) ; SHIKATA Shinichi 産業技術総合研究所, センター長 (00415689) ; SASAO Mamiko 東北大学, 工学研究科, 教授 (00144171) ; SATO Satoshi 日本原子力研究開発機構, 研究主幹 (20354607) ; ISOBE Mitsutaka 核融合科学研究所, 准教授 (00300731) ; NAKAI Mitsuo 大阪大学, レーザーエネルギー学研究センター, 准教授 (70201663) ; ASANO Yoshihiro 理化学研究所, X線自由電子レーザー計画推進本部, グループディレクター (40354980) ; ISHIKAWA Masazumi 北海道大学, 大学院・医学研究科, 教授 (80314772)
• Project Period (FY): 2010 – 2012
• Keywords: 原子力計測 / 放射線物理

Research Abstract

Growth condition of CVD diamond single crystals were optimized. Radiation detectors were fabricated form the grown CVD diamonds; then induced charge collection distribution measurement for the detectors were carried out by use of alpha particles. Charge collection efficiency of 100 % and 97 %, μτ values of 1×10-4 and 9.6×10-6 cm2/V for holes and electrons were achieved by one of the best detectors. In addition, energy resolution of 3.5 % at a peak caused by the 12C(n, alpha)9Be reactions were obtained in response function measurement for 14 MeV neutrons. Fast time resolution of 350 ps was also achieved for 8 GeV electron beams.

Research Products

• [Journal Article] Growth and evaluation of self-standing CVD diamond single crystals on off-axis (001) surface of HP/HT type IIa substrates (2012)
  • Author(s): J. H. Kaneko , F. Fujita , Y. Konno , T.Gotoh , N.Nishi , H.Watanabe, A. Chayahara , H.Umezawa , N. Tsubouchi , S. Shikata, M. Isobe
  • Journal Title: Diamond and related Materials Volume: 26 Pages: 45-49
  • Peer Reviewed
• [Journal Article] Characterization of a sandwich-type large CVD single crystal diamond particle detector fabricatedusing a lift-off method (2012)
  • Author(s): N. Tsubouchi, Y. Mokuno1, A. Kakimoto, Y. Konno, H. Yamada, A. Chayahara, J. H. Kaneko, F. Fujita, S. Shikata
  • Journal Title: Diamond. Relat. Mater Volume: vol.24 Pages: 74-77
  • Peer Reviewed
• [Journal Article] Improvement of crystal quality of a homoepitaxially grown diamond layer by a plasma etching treatment for a diamondsubstrate (2011)
  • Author(s): Yuta Konno, Junichi H Kaneko, Fumiyuki Fujita, Hideyuki Watanabe, Kei Sato, Akinori Kakimoto, Sinichi Shikata, Akira Homma, Michihiro Furusaka
  • Journal Title: PROGRESS IN NUCLEAR SCIENCE AND TECHNOLOGY Volume: 1 Pages: 255
  • Peer Reviewed
• [Presentation] オフ角制御高圧高温合成IIa型基板上へのCVD単結晶ダイヤモンドの合成と評価3～CH_4濃度・RF出力の電荷キャリア輸送特性への影響 (2012)
  • Author(s): 佐竹、金子
  • Organizer: ダイヤモンドシンポジウム
  • Place of Presentation: 青山学院大学
  • Year and Date: 20121100