Development of organic semiconductor detector for low-mass dark matter direct searches

• Project/Area Number: 25610057
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kobe University
• Principal Investigator: MIUCHI Kentaro 神戸大学, 理学(系)研究科(研究院), 准教授 (80362440)
• Co-Investigator(Kenkyū-buntansha): KUMAKI Daisuke 山形大学, 理工学研究科, 准教授 (80597146)
• Co-Investigator(Renkei-kenkyūsha): TANAKA Manobu 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (00222117) ; NAKA Tatsuhiro 名古屋大学, 高等研究院, 特任助教 (00608888)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 暗黒物質 / 有機半導体 / 粒子検出器 / 検出器

Outline of Final Research Achievements

Direct detection of low mass dark matter can be realized with low-threshold detector made of low-Z materials. This research program aimed to utilize organic semiconductors for particle detector and develop fundamental properties as a dark matter detector.
We developed a FET transistor with organic semiconductor and measured its properties. The transistor showed typical properties as a transistor, though the leak current was larger than other semiconductors. We irradiated the transistor with alpha-rays and heavy ions and found that we need to improve the signal-to-noise ratio with a factor of several to use as a particle detector.

Research Products

• [Presentation] Dark Matter (poster presentaion) (2014)
  • Author(s): Kentaro Miuchi
  • Organizer: 11th Japanese-German Frontiers of Science Symposium(JGFoS)
  • Place of Presentation: Hotel INNSIDE by Melia BREMEN (Bremen, Germany)
  • Year and Date: 2014-10-31 – 2014-11-02
• [Presentation] DM direct searches in JAPAN (2014)
  • Author(s): Kentaro Miuchi
  • Organizer: KUBEC International Workshop on Dark Matter Searches
  • Place of Presentation: Brussels, Beigium
  • Year and Date: 2014-08-28
• [Presentation] 暗黒物質直接探索 (2014)
  • Author(s): 身内賢太朗
  • Organizer: 基研研究会 素粒子物理学の進展2014
  • Place of Presentation: 京都大学 基礎物理学研究所
  • Year and Date: 2014-07-19
  • Invited
• [Presentation] 低質量暗黒物質直接探索実験 (2014)
  • Author(s): 身内賢太朗
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学
• [Presentation] 直接探索の将来計画 (2013)
  • Author(s): 身内賢太朗
  • Organizer: 日本物理学会2013年秋季大会 高知大学（シンポジウム「暗黒物質探索の現状と将来」）
  • Place of Presentation: 高知大学
  • Invited