R&D of a detector for sterile neutrino search at J-PARC

• Project/Area Number: 26400286
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University
• Principal Investigator: FURUTA HISATAKA 東北大学, ニュートリノ科学研究センター, 研究支援者 (50467023)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: ステライルニュートリノ / ニュートリノ振動 / ガドリニウム液体シンチレータ / J-PARC / 波形弁別法 / 液体シンチレータ / 波形弁別 / Birks係数 / 透過率 / 粒子識別検出器デザインの決定 / 背景事象測定

Outline of Final Research Achievements

Sterile neutrino is a particle, which can interact with only gravity, and the existence was indicated by LSND experiment. It impacts on particle physics and cosmology to observe the sterile neutrino.
JSNS2 experiment is planed at MLF facility in J-PARC as re-measurement of LSND experiment, it is unique experiment in the world.
In this research, we carried out background measurement with 500kg of plastic scintillator detector at real detector location for JSNS2. Comparing the result and the MC simulation, the detector design was fixed and amount of background for the real detector was estimated.

Research Products

• [Journal Article] Status Report (22th J-PARC PAC): Searching for a Sterile Neutrino at J-PARC MLF (E56, JSNS2) (2016)
  • Author(s): S.Hasegawa, T.Maruyama, T.Kawasaki, S.Iwata, T.Shima, Y.Sugaya, H.Furuta, Y.Hino, F.Suekane, I.Stancu, M.Yeh, E.Iwai, J.Jordan, J.Spitz
  • Journal Title: arxiv[physics.ins-det] Volume: 1610 Pages: 08186-08186
  • Int'l Joint Research
• [Journal Article] On-site background Measurements for the J-PARC E56 Experiment: A Search for Sterile Neutrino at J-PARC MLF (2016)
  • Author(s): S. Ajimura, S. Ajimura, T. J. C. Bezerra, E. Chauveau, T. Enomoto, H. Furuta, M. Harada, S. Hasegawa, T. Hiraiwa, Y. Igarashi, E. Iwai, T. Maruyama, S. Meigo, T. Nakano, M. Niiyama, K. Nishikawa, M. Nomachi, R. Ohta, H. Sakai, K. Sakai, S. Sakamoto et al.
  • Journal Title: PTEP Volume: 063C01 Issue: 6 Pages: 78-78
  • DOI: 10.1093/ptep/ptv078
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] J-PARC MLFにおけるステライルニュートリノ探索実験(JSNS2; J-PARC E56) 2 (2017)
  • Author(s): 日野陽太
  • Organizer: 日本物理学会春季大会
  • Place of Presentation: 大阪大学（大阪府豊中市）
• [Presentation] 波形弁別能力を実装したGd入り液体シンチレータの CYRIC 70MeV中性子ビームを用いた性能評価測定 (2016)
  • Author(s): 古田久敬
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 宮崎大学（宮崎県宮崎市）
• [Presentation] J-PARC MLFにおけるステライルニュートリノ探索実験のための背景事象測定結果1 (2015)
  • Author(s): 坂井勇登
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学（東京）
  • Year and Date: 2015-03-21
• [Presentation] J-PARC MLFにおけるステライルニュートリノ検出器設置候補地での背景事象測定結果1 (2014)
  • Author(s): 坂井勇登
  • Organizer: 日本物理学会2014秋季大会
  • Place of Presentation: 佐賀大学（佐賀）
  • Year and Date: 2014-09-18
• [Presentation] A Search for Sterile Neutrino at J-PARC Materials and Life Science Experimental Facility (2014)
  • Author(s): 古田久敬
  • Organizer: The 2nd International Symposium on Science at J-PARC 2014
  • Place of Presentation: EPOCHAL TSUKUBA（つくば）
  • Year and Date: 2014-07-15
• [Remarks] J-PARC MLF中性子源を用いたステライルニュートリノ探索
  • URL: http://research.kek.jp/group/mlfnu/index.html