R&D of the multipurpose detector using wavelength shifter and liquid xenon

• Project/Area Number: 24654055
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University
• Principal Investigator: UESHIMA Kota 東北大学, ニュートリノ科学研究センター, 助教 (80605379)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 波長変換剤 / シンチレーション光 / 二重β崩壊探索 / 暗黒物質探索

Research Abstract

The acrylic vessel evaporating the wavelength shifter in the inner surface was cooled down to -100 degree using liquid nitrogen and Novec7100 to fill the liquid xenon into the acrylic vessel. The xenon scintillation light caused by gamma ray was detected as the visible light by PMT after the liquid xenon filled into the acrylic vessel.
The scintillation light measurement system was developed to realize the low BG detector. The light yield more than 600p.e./MeV was achieved even though the PMT was kept 40 cm away from the acrylic vessel.
To reduce the surface BG of the detector, the new plastic scintillator was developed by dissolving TPB into the plastic scintillator.

Research Products

• [Journal Article] Search for solar axions in XMASS, a large liquid-xenon detector (2013)
  • Author(s): K. Abe et al.
  • Journal Title: Physics Letters B Volume: 724 Issue: 1-3 Pages: 46-50
  • DOI: 10.1016/j.physletb.2013.05.060
  • Peer Reviewed
• [Journal Article] XMASS detector, Nuclear Instruments and Methods (2013)
  • Author(s): K.Abe, (14 名), A.Takeda
  • Journal Title: Physics Research Section A Volume: 716 Pages: 78-85
  • DOI: 10.1016/j.nima.2013.03.059
  • Peer Reviewed
• [Journal Article] Limit on NeutrinolessββDecay of 136Xe from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in 76Ge (2013)
  • Author(s): A.Gando, Y.Gando, K.Ueshima
  • Journal Title: Physical Review Letters Volume: 110 Pages: 62502-62502
  • Peer Reviewed
• [Journal Article] Low mass WIMP search with XMASS (2013)
  • Author(s): K.Abe, …(14 名 ), A.Takeda
  • Journal Title: Physics Letters B Volume: 719 Issue: 1-3 Pages: 78-82
  • DOI: 10.1016/j.physletb.2013.01.001
  • Peer Reviewed
• [Journal Article] Limit on Neutrinoless ββ Decay of ^<136>Xe from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in ^<76>Ge (2013)
  • Author(s): A. Gando, et al. (The KamLAND-Zen Collaboration)
  • Journal Title: Physicsl Review Letters Volume: 110 Issue: 6 Pages: 62502-62502
  • DOI: 10.1103/physrevlett.110.062502
  • Peer Reviewed
• [Journal Article] Limits on Majoron-emitting double-β decays of ^<136>Xe in the KamLAND-Zen experiment (2012)
  • Author(s): A. Gando, et al. (The KamLAND-Zen Collaboration)
  • Journal Title: Physical Review C Volume: 86 Issue: 2 Pages: 1-4
  • DOI: 10.1103/physrevc.86.021601
  • Peer Reviewed
• [Journal Article] Measurement of the Double-Beta Decay Half-life of ^<136>Xe in KamLAND-Zen (2012)
  • Author(s): A.Gando, et al
  • Journal Title: Physical Review C Volume: (受理済み) Issue: 4 Pages: 45504-45504
  • DOI: 10.1103/physrevc.85.045504
  • Peer Reviewed
• [Presentation] KamLAND and KamLAND-Zen results (2013)
  • Author(s): K.Ueshima
  • Organizer: RENO50
  • Place of Presentation: Seoul Korea
• [Presentation] Purification system of KamLADN-Zen experiment (2012)
  • Author(s): K.Ueshima
  • Organizer: Neutrino2012
  • Place of Presentation: Kyoto Japan (poster)
• [Presentation] Purification system of KamLAND-Zen experiment (poster) (2012)
  • Author(s): K.Ueshima
  • Organizer: Neutrino 2012
  • Place of Presentation: 京都市