Development of position sensitive CCD based detectors for neutrons and measurement of quantization effects using neutrons

• Project/Area Number: 20340050
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: KOMAMIYA Sachio 東京大学, 大学院・理学系研究科, 教授 (80126060)
• Co-Investigator(Kenkyū-buntansha): KAMIYA Yoshio 東京大学, 素粒子物理国際研究センター, 助教 (90434323)
• Co-Investigator(Renkei-kenkyūsha): SHIMIZU Hirohiko 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (50249900)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000); Fiscal Year 2010: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000); Fiscal Year 2009: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000); Fiscal Year 2008: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
• Keywords: 超冷中性子 / CCD / 地球重力 / 量子力学 / ILL

Research Abstract

We developed a precise position detector for neutrons based on CCD in order to investigate quantum effects of terrestrial gravity. To convert neutrons to charged particles^10B is attached to the CCD surface by a vacuum deposition. To test the performance of the detector we exposed the detector to cold neutrons from JAEA rector at Tokai-mura and ultracold neutrons from a reactor at Institute Laue-Langevin(ILL) France. Successful results were obtained for detection efficiency and position resolution to investigate the quantum effects. Although we could not clearly observe quantum effects of gravity, we searched for and set limits to new short-range forces.

Research Products

• [Journal Article] Development of a Pixel Detector for Ultra-Cold Neutrons (2011)
  • Author(s): S. Kawasaki, Y. Kamiya, S. Komamiyaet al
  • Journal Title: Nuclear Instrument and Method Volume: A615 Pages: 42-47
  • Peer Reviewed
• [Journal Article] Proposal for measuring the quantum states of neutrons in the gravitational field with a CCD-based pixel sensor (2009)
  • Author(s): T. Sanuki, S. Komamiya, S. Kawasaki andS. Sonoda
  • Journal Title: Nuclear Instruments and Methods in Physics Research A Volume: 600 Pages: 657-660
  • Peer Reviewed
• [Journal Article] Proposal for measuring the quantum states of neutrons in the gravitational field with a CCD-based pixel sensor (2009)
  • Author(s): T.Sanuki, S.Komamiya, S.Kawasaki, S.Sonoda
  • Journal Title: Nuclear Instruments and Methods in physics Research 600 Pages: 657-660
  • Peer Reviewed
• [Presentation] 重力場による超冷中性子の量子状態の観測:実験装置の概要と改良点 (2011)
  • Author(s): 南雄人
  • Organizer: 日本物理学会第66回年次大会
  • Year and Date: 2011-03-28
• [Presentation] 重力場による超冷中性子の量子状態の観測 (2011)
  • Author(s): 南雄人
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: (Web上のみ(見なし発表))
  • Year and Date: 2011-03-28
• [Presentation] 重力場による超冷中性子の量子状態観測-ILLでの超冷中性子照射試験について (2008)
  • Author(s): 川崎真介
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 山形大学
  • Year and Date: 2008-09-23
• [Presentation] 重力場による超冷中性子の量子状態観測-ILLでの超冷中性子照射試験につい (2008)
  • Author(s): 川崎真介
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 山形大学
  • Year and Date: 2008-09-23