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Search for false signals in underground dark matter detectors

Research Project

Project/Area Number 16K05371
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

Kozlov Alexandre  東京大学, カブリ数物連携宇宙研究機構, 特任助教 (30528063)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsDark Matter / underground laboratory / NaI(Tl) detector / dark matter / Ionization Chamber / Radon Detector / Thermal Neutron Detector / neutron-flux variations / radon activity
Outline of Final Research Achievements

The research project aimed at direct measurement of possible sources of periodic background that may affect search for the Dark Matter at deep underground laboratories was successfully completed. For that purpose, we constructed several particle detectors and installed them at the Kamioka neutrino observatory. The detectors were used to measure the thermal and fast neutron flux, and the radon gas activity underground for a 1-year period. The acquired experimental data are being used to study backgrounds that could give an alternative explanation to the well-known Dark Matter observation claim made by the DAMA/LIBRA collaboration.

Academic Significance and Societal Importance of the Research Achievements

本課題研究により取得された実験データを使った結果は、学術誌に掲載発表された。
これらのデータは、私たちの宇宙の約25%を構成する暗黒物質の起源を理解するために役に立つ。また、これらの結果は新しい物理の探索を目的とした新規の地下実験の計画のためにも利用することができる。本課題研究の期間中、私たちは地元のエンジニアリング会社と協力し、検出器のコンポーネントの製造に必要なサポートを得て、検出器を建設した。大学と産業の間のこのような協力は、神岡のような継続的な人口減少が進む遠隔地でも最先端の研究を続けることを可能にする。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (8 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results,  Acknowledgement Compliant: 2 results) Presentation (5 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] A large area detector for thermal neutron flux measurements at the KamLAND site2018

    • Author(s)
      Kozlov A.、Chernyak D.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 903 Pages: 162-169

    • DOI

      10.1016/j.nima.2018.07.006

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen2016

    • Author(s)
      清水格
    • Journal Title

      Physical Review Letters

      Volume: 117 Issue: 8 Pages: 082503-082503

    • DOI

      10.1103/physrevlett.117.082503

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] A Search for Electron Antineutrinos Associated with Gravitational-wave Events GW150914 and GW151226 Using KamLAND2016

    • Author(s)
      A.Gando et al. (KamLAND Collaboration)
    • Journal Title

      The Astrophysical Journal

      Volume: 829 Issue: 2 Pages: L34-L34

    • DOI

      10.3847/2041-8205/829/2/l34

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Detectors for Dark Matter search at KamLAND2019

    • Author(s)
      Kozlov A
    • Organizer
      VCI 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The Dark Matter search at KamLAND2018

    • Author(s)
      Kozlov A
    • Organizer
      ICPPA 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Search for the neutrinoless double beta decay of Xenon-136 and Dark Matter at KamLAND2018

    • Author(s)
      Kozlov A
    • Organizer
      New Trends in High Energy Physics 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Search for new physics at KamLAND2017

    • Author(s)
      Alexandre Kozlov
    • Organizer
      APPEC the Mount Elbrus Conference: from Deep Underground up to the Sky, Russia
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Search for physics beyond the Standard Model at KamLAND2017

    • Author(s)
      Alexandre Kozlov
    • Organizer
      The 3rd international conference on particle physics and astrophysics, Russia
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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