Study of Dark Matter

• Project/Area Number: 19GS0204
• Research Category: Grant-in-Aid for Creative Scientific Research
• Allocation Type: Single-year Grants
• Research Institution: The University of Tokyo
• Principal Investigator: SUZUKI Yoichiro 東京大学, 宇宙線研究所, 教授 (70144425)
• Co-Investigator(Kenkyū-buntansha): MORIYAMA Shigetaka 東京大学, 宇宙線研究所, 准教授 (50313044) ; NAKAHATA Masayuki 東京大学, 宇宙線研究所, 教授 (70192672) ; KOSHIO Yuusuke 東京大学, 宇宙線研究所, 助教 (80292960) ; NAKAMURA Syogo 横浜国立大学, 工学研究科, 准教授 (50212098) ; TAKEUCHI Yasuo 神戸大学, 理学部, 教授 (60272522)
• Co-Investigator(Renkei-kenkyūsha): KISIMOTO Yasuhiro 東京大学, 宇宙線研究所, 准教授 (30374911) ; TAKEDA Atsushi 東京大学, 宇宙線研究所, 助教 (40401286) ; ABE Kou 東京大学, 宇宙線研究所, 助教 (30401285) ; SEKIYA Hiroyuki 東京大学, 宇宙線研究所, 助教 (90402768) ; YAMASHITA Masaki 東京大学, 宇宙線研究所, 特任准教授 (10504574) ; OGAWA Hiroshi 東京大学, 宇宙線研究所, 特任助教 (20374910) ; KOBAYASHI Kazuyoshi 東京大学, 宇宙線研究所, 特任助教 (70466861) ; HIRAIDE Katsuki 東京大学, 宇宙線研究所, 特任助教 (10584261)
• Project Period (FY): 2007 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥590,590,000 (Direct Cost: ¥454,300,000、Indirect Cost: ¥136,290,000); Fiscal Year 2011: ¥93,730,000 (Direct Cost: ¥72,100,000、Indirect Cost: ¥21,630,000); Fiscal Year 2010: ¥129,610,000 (Direct Cost: ¥99,700,000、Indirect Cost: ¥29,910,000); Fiscal Year 2009: ¥127,270,000 (Direct Cost: ¥97,900,000、Indirect Cost: ¥29,370,000); Fiscal Year 2008: ¥113,100,000 (Direct Cost: ¥87,000,000、Indirect Cost: ¥26,100,000); Fiscal Year 2007: ¥126,880,000 (Direct Cost: ¥97,600,000、Indirect Cost: ¥29,280,000)
• Keywords: 暗黒物質 / 液体キセノン / 宇宙線 / 宇宙物理 / 素粒子実験 / 宇宙物質

Research Abstract

We have succeeded to construct the world largest liquid Xenon detector in order to make an observation of Dark Matter in the laboratory experiment. By the calibration data to understand the detector revealed that we have large light yields which shows the high sensitivity for the dark matter search. We have also succeeded to reduce the most serious background of Kr to the level of 2. 7 ppt which is the world lowest background level achieved. The most of the source of backgrounds are identified and we are ready to make an observation.

Research Products

• [Journal Article] Self-shielding effect of a single phase liquid xenon detector for direct dark matter search (2012)
  • Author(s): A. Minamino, K. Abe, Y. Ashie, J. Hosaka, K. Ishihara, K. Kobayashi, Y. Koshio, C. Mitsuda, S. Moriyama, M. Nakahata, Y. Nakajima, T. Namba, H. Ogawa, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takeuchi, K. Taki, K. Ueshima, Y. Ebizuka, A. Ota, S. Suzuki, H. Hagiwara, Y. Hashimoto, S. Kamada, M. Kikuchi, N. Kobayashi, T. Nagase, S. Nakamura, K. Tomita, Y. Uchida, Y. Fukuda, Tl Sato, K. Nishijima, T. Maruyama, D. Motoki, Y. Itow, Y. D. Kim, J. I. Lee, S. H. Moon, K. E. Lim, J. P. Cravens, M. B. Smy
  • Journal Title: Astroparticle physics Volume: 35 Pages: 609-614
  • URL: http://dx.doi.org/10.1016/j.astropartphys.2012.01.005
  • Peer Reviewed
• [Journal Article] Radon Removal from Gaseous Xenon with activated Charcoal (2012)
  • Author(s): K. Abe, K. Hieda, K. Hiraide, S. Hirano, Y. Kishimoto, K. Kobayashi, H. Sekiya, A. Shinozaki, Y. Suzuki, O. Takachio, A. Takeda, K. Ueshima, D. Umemoto, M. Yamashita, K. Hosokawa, A. Murata, K. Otsuka, Y. Takeuchi, F. Kusaba, D. Motoki, K. Nishijima, S. Tasaka, K. Fujii, I. Murayama, S. Nakamura, Y. Fukuda, Y. Itow, K. Masuda, Y. Nishitani, H. Takiya, H. Uchida, Y. D. Kim, Y. H. Kim, K. B. Lee, M. K. Lee, J. S. Lee
  • Journal Title: Nuclear Instruments and Methods in Phys. Res. A Volume: 661 Pages: 50-57
  • URL: http://dx.doi.org/10.1016/j.nima.2011.09.051
  • Peer Reviewed
• [Journal Article] Radon Removal from Gaseous Xenon with activated Charcoal (2012)
  • Author(s): K.Abe, et al.(XMASS collaboration)
  • Journal Title: Nuclear Instruments and Methods in Phys.Res.A Volume: 661 Issue: 1 Pages: 50-57
  • DOI: 10.1016/j.nima.2011.09.051
  • Peer Reviewed
• [Journal Article] elding effect of a single phase liquid xenon detector for direct dark matte (2012)
  • Author(s): Minamino, et al.(XMASS collaboration)
  • Journal Title: Astroparticle Physics Volume: 35 Issue: 10 Pages: 609-614
  • DOI: 10.1016/j.astropartphys.2012.01.005
  • Peer Reviewed
• [Journal Article] Scintillation-only bsed pulse shape discrimination for nuclear and electron recoils in liquid xenon (2011)
  • Author(s): K. Ueshima, K. Abe, K. Hiraide, S. Hirano, Y. Kishimoto, K. Kobayashi, Y. Koshio, J. Liu, K. Martens, S. Moriyama, M. Nakahata, H. Nishiie, H. Ogawa, H. Sekiya, A. Shinozaki, Y. Suzuki, A. Takeda, M. Yamashita, K. Fujii, I. Murayama, S. Nakamura, K. Otsuka, Y. Takeuchi, Y. Fukuda, K. NIshijima, D. Motoki, Y. Itow, K. Masuda, Y. Nishitani, H. Uchida, S. Tasaka, H. Ohsumi, Y. D. Kim, Y. H. Kim, K. B. Lee, M. K. Lee, J. S. Lee
  • Journal Title: Nuclear Instruments and Methods in Phys. Rev. A Volume: 659 Pages: 161-168
  • URL: http://dx.doi.org/10.1016/j.nima.2011.09.011
  • Peer Reviewed
• [Journal Article] Review of instrumentation for observational particle physics (2010)
  • Author(s): Y. Suzuki
  • Journal Title: Nuclear Instruments and Methods in Phys. Res. A Volume: 623 Pages: 57-62
  • URL: http://dx.doi.org/10.1016/j.nima.2010.02.150
  • Peer Reviewed
• [Journal Article] Review of instrumentation for observational particle physics (2010)
  • Author(s): Y.Suzuki
  • Journal Title: Nucl.Instr.and Meth. Volume: 623 Pages: 57-62
  • Peer Reviewed
• [Journal Article] Distillation of Liquid Xenon to Remove Krypton (2009)
  • Author(s): K. Abe, J. Hosaka, T. Iida, M. Ikeda, K. Kobayashi, Y. Koshio, A. Minamino, M. Miura, S. Moriyama, M. Nakahata, Y. Nakajima, T. Namba, H. Ogawa, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takeuchi, K. Ueshima, M. Yamashita, K. Kaneyuki, Y. Ebizuka, J. Kikuchi, A. Ota, S. Suzuki, T. Takahashi, H. Hagiwara, T. Kamei, K. Miyammoto, T. Nagase, S. Nakamura, Y. Ozaki, T. Sato, Y. Fukuda, T. Sato, K. Nishijima, M. Sakurai, T. Maruyama, D. Motoki, Y. Itow, H. Ohsumi, S. Tasaka, S. B. Kim, Y. D. Kim, J. I. Lee, S. H. Moon, Y. Urakawa, M. Uchino, Y. Kamioka
  • Journal Title: Astroparticle Physics Volume: 31 Pages: 290-296
  • URL: http://dx.doi.org/10.1016/j.astropartphys.2009.02.006
  • Peer Reviewed
• [Journal Article] Distillation of Liquid Xenon to Remove Krypton (2009)
  • Author(s): K. Abe, et al.
  • Journal Title: Astroparticle Physics 31 Pages: 290-296
  • Peer Reviewed
• [Journal Article] Scintillation yield of liquid xenon temperature at room temperature (2008)
  • Author(s): K. Ueshima, K. Abe, T. Iida, M. Ikeda, K. Kobayashi, Y. Koshio, A. Minamino, M. Miura, S. Moriyama, M. Nakahata, Y. Nakajima, H. Ogawa, H. Sekiya, M. Shiozawa, Y. Suzuki, A. Takeda, Y. Takeuchi, M. Yamashita, K. Kaneyuki, T. Doke, Y. Ebizuka, J. Kikuchi, A. Ota, S. Suzuki, T. Takahashi, H. Hagiwara, T. Kamei, K. Miyamoto, Y. Nagase, S. Nakamura, Y. Ozaki, T. Sato, Y. Fukuda, T. Sato, K. Nishijima, M. Sakurai, T. Maruyama, D. Motoki, Y. Itow, H. Ohsumi, S. Tasaka, S. B. Kim, Y. D. Kim, J. I. Lee, S. H. Moon
  • Journal Title: Nuclear Instruments and Methods in Phys. Res. A Volume: 594 Pages: 148-154
  • URL: http://dx.doi.org/10.1016/j.nima.2008.06.017
  • Peer Reviewed
• [Journal Article] Scintillation yield of liquid Xenon at Room Temperature (2008)
  • Author(s): K. Ueshima, et al.
  • Journal Title: Nucl. Inst. And Meth. A 594 Pages: 148-148
  • Peer Reviewed
• [Journal Article] Scintillation yield of liquid xenon at room temperature (2008)
  • Author(s): The XMASS collaboration(K.Ueshima, et al.)
  • Journal Title: Nuclear Instruments and Methods, Section A 594 Pages: 148-154
  • Peer Reviewed
• [Presentation] Direct Dark Matter Search Experiments (2011)
  • Author(s): M.Yamashita
  • Organizer: International workshop and school "Particle Cosmology"
  • Place of Presentation: Nagoya, Japan(招待講演)
  • Year and Date: 2011-12-18
• [Presentation] International Workshop on Particle Cosmology (2011)
  • Author(s): 山下雅樹
  • Organizer: XMASS experiment
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2011-12-16
• [Presentation] Recent progress of direct dark matter detection (2011)
  • Author(s): S.Moriyama
  • Organizer: The 3rd Subaru International Conference
  • Place of Presentation: Syuzenji, Japan(招待講演)
  • Year and Date: 2011-11-04
• [Presentation] Subaru International Conference (2011)
  • Author(s): 森山茂栄
  • Organizer: XMASS experiment
  • Place of Presentation: Shuzenji, Japan
  • Year and Date: 2011-11-01
• [Presentation] Recent progress of direct dark matter detection (2011)
  • Author(s): S.Moriyama
  • Organizer: Fundamental Physics using Atoms
  • Place of Presentation: Okayama, Japan(招待講演)
  • Year and Date: 2011-10-08
• [Presentation] The XMASS 800kg experiment (2011)
  • Author(s): J.Liu (XMASS collaboration)
  • Organizer: TAUP2011
  • Place of Presentation: Munich, Germany
  • Year and Date: 2011-09-05
• [Presentation] Direct Search for Dark Matter (2011)
  • Author(s): Y.Suzuki
  • Organizer: European Physics Society
  • Place of Presentation: Grenoble, France(招待講演)
  • Year and Date: 2011-07-26
• [Presentation] Direct Dark Matter Experiments (2011)
  • Author(s): 鈴木洋一郎
  • Organizer: European Physics Society
  • Place of Presentation: Grenoble, France
  • Year and Date: 2011-07-21
• [Presentation] Status of XMASS (2011)
  • Author(s): Y.Kisimoto (XMASS collaboration)
  • Organizer: The 7th PATRAS WS on Axions, WIMPs and WISPs
  • Place of Presentation: Mykonos, Greece(招待講演)
  • Year and Date: 2011-06-29
• [Presentation] Patras Workshop on Axions, WIMPs (2011)
  • Author(s): 岸本康宏
  • Organizer: Status of XMASS
  • Place of Presentation: Mykonos, Greece
  • Year and Date: 2011-06-27
• [Presentation] Status of XMASS (2011)
  • Author(s): A.Takeda (XMASS collaboration)
  • Organizer: 2nd International workshop towards the Giant Liquid Argon Charge Imaging Experiment
  • Place of Presentation: Jyvaaskylaa, Finland(招待講演)
  • Year and Date: 2011-06-08
• [Presentation] GLA2011 (2011)
  • Author(s): 竹田敦
  • Organizer: XMASS
  • Place of Presentation: Jyvaaskylaa, Finland
  • Year and Date: 2011-06-05
• [Presentation] Recent status of XMASS experiment (2011)
  • Author(s): S.Moriyama (XMASS collaboration)
  • Organizer: Shanghai Particle Physics and Cosmology
  • Place of Presentation: Shaghai, China(招待講演)
  • Year and Date: 2011-06-03
• [Presentation] Shanghai Particle Physics and Cosmology (2011)
  • Author(s): 森山茂栄
  • Organizer: XMASS
  • Place of Presentation: Shanghai, China
  • Year and Date: 2011-06-01
• [Presentation] Das XMASS Experiment in Kamioka, Japan (2011)
  • Author(s): K.Martens, et al
  • Organizer: Deutsche Physicalische Gesellshaft spring meeting of Hardronic and Nuclear Physics Division
  • Place of Presentation: Muenster, Germany
  • Year and Date: 2011-03-21
• [Presentation] DUSEL workshop (2010)
  • Author(s): 安部航
  • Organizer: Status of XMASS
  • Place of Presentation: Homestake, USA
  • Year and Date: 2010-10-01
• [Presentation] Status of XMASS experiment (2010)
  • Author(s): H.Ogawa, et al
  • Organizer: COSMO/CosPA
  • Place of Presentation: Koshiba Hall, The University of Tokyo
  • Year and Date: 2010-10-01
• [Presentation] COSMO/CosPA2010 (2010)
  • Author(s): 小川洋
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2010-09-27
• [Presentation] Low background techniques in XMASS (2010)
  • Author(s): A.Takeda, et al
  • Organizer: LRT2010
  • Place of Presentation: SNOLAB, Sudbury, Canada
  • Year and Date: 2010-08-29
• [Presentation] LRT2010 (2010)
  • Author(s): 竹田敦
  • Organizer: XMASS
  • Place of Presentation: Sadbury, Canada
  • Year and Date: 2010-08-28
• [Presentation] Status of XMASS Experiment (2010)
  • Author(s): S.Moriyama, et al
  • Organizer: IDM2010
  • Place of Presentation: Montpellier, France
  • Year and Date: 2010-07-27
• [Presentation] IDM2010 (2010)
  • Author(s): 森山茂栄
  • Organizer: XMASS
  • Place of Presentation: Montpellier, France
  • Year and Date: 2010-07-26
• [Presentation] TeV Particle Astrophysics 2010 (2010)
  • Author(s): 小林兼好
  • Organizer: XMASS Experiment
  • Place of Presentation: Paris, France
  • Year and Date: 2010-07-19
• [Presentation] XMASS experiment (2010)
  • Author(s): K.Kobayashi, et al
  • Organizer: TeV Particle AstroPhysics 2010
  • Place of Presentation: Paris, France
  • Year and Date: 2010-07-19
• [Presentation] Patras WS on Axions WIMPs (2010)
  • Author(s): 山下雅樹
  • Organizer: XMASS Experiment
  • Place of Presentation: Zurich, Switzerland
  • Year and Date: 2010-07-05
• [Presentation] GLA2010 (2010)
  • Author(s): 関谷洋之
  • Organizer: XMASS
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 2010-03-29
• [Presentation] WONDER2010 (2010)
  • Author(s): 山下雅樹
  • Organizer: XMASS Experiment
  • Place of Presentation: Gran Sasso, Italy
  • Year and Date: 2010-03-22
• [Presentation] Radon Removal from Liquid Xenon (2010)
  • Author(s): K.Martens, et al
  • Organizer: Neutrino2010
  • Place of Presentation: Athens, Greece
• [Presentation] Overview and physics motivation of the XMASS experiment (2010)
  • Author(s): K.Hiraide, et al
  • Organizer: Neutrino2010
  • Place of Presentation: Athens, Greece
• [Presentation] XMASS (2010)
  • Author(s): M.Yamashita, et al
  • Organizer: 6th Patras Workshop on Axions, WIMPs, WISPs
  • Place of Presentation: Switzerland, Zurich
• [Presentation] Status of XMASS experiment (2010)
  • Author(s): K.Abe, et al
  • Organizer: 35^<th> International Conference of High Energy Physics (ICHEP2010)
  • Place of Presentation: Paris, France
• [Presentation] Direct dark matter search activities in Japan (2010)
  • Author(s): S.Moriyama, et al
  • Organizer: 日韓合同物理学会
  • Place of Presentation: Phoenix Park Resort, Korea
• [Presentation] The XMASS experiment (2010)
  • Author(s): K.Abe, et al
  • Organizer: DUSEL workshop
  • Place of Presentation: South Dakota, U.S.A.
• [Presentation] Status of XMASS (2010)
  • Author(s): Y.D.Kim, et al
  • Organizer: China-Korea Workshop on Dark Matter Search and Double Beta decay
  • Place of Presentation: China, Chengdu
• [Presentation] XMASS at Kamioka : Large Scale Cryogenic detector in the underground laboratory (2010)
  • Author(s): M. Yamashita
  • Organizer: WONDER2010
  • Place of Presentation: Gran Sasso laboratory, Italy
• [Presentation] IWDD09 (2009)
  • Author(s): 小林兼好
  • Organizer: Status of XMASS experiment
  • Place of Presentation: Shanghai, China
  • Year and Date: 2009-06-15
• [Presentation] CIPANP2009 (2009)
  • Author(s): 安部航
  • Organizer: The XMASS Experiment
  • Place of Presentation: San Diego, USA
  • Year and Date: 2009-05-26
• [Presentation] Status of XMASS experiment (2009)
  • Author(s): K. Kobayashi
  • Organizer: IWDD09
  • Place of Presentation: Shanghai, China
• [Presentation] The XMASS experiment (2009)
  • Author(s): K. Abe
  • Place of Presentation: San Diego, California
• [Presentation] IDM2009 (2008)
  • Author(s): 鈴木洋一郎
  • Organizer: XMASS
  • Place of Presentation: Stockholm, Sweden
  • Year and Date: 2008-08-19
• [Presentation] XMASS (2008)
  • Author(s): Y. Suzuki
  • Organizer: IDM2008
  • Place of Presentation: Stockholm, Sweden
• [Presentation] Dark07 (2007)
  • Author(s): 中畑雅行
  • Organizer: Status XMASS Experiment
  • Place of Presentation: Sydney, Australia
  • Year and Date: 2007-09-28
• [Presentation] TAUP2007 (2007)
  • Author(s): 安部航
  • Organizer: The XMASS Experiment
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2007-09-12
• [Presentation] NuFact07 (2007)
  • Author(s): 森山茂栄
  • Organizer: Dark Matter Searches
  • Place of Presentation: Okayama, Japan
  • Year and Date: 2007-08-08
• [Presentation] Hunt for Dark Matter (2007)
  • Author(s): 安部航
  • Organizer: XMASS Status
  • Place of Presentation: Fermi Lab, USA
  • Year and Date: 2007-05-10
• [Presentation] Dark Matter Searches (2007)
  • Author(s): S. Moriyama
  • Organizer: NuFact07
  • Place of Presentation: Okayama, Japan
• [Presentation] Construction and performance of XMASS 800kg detector
  • Author(s): J.Liu, et al
  • Organizer: Neutrino2010
  • Place of Presentation: Athens, Greece
• [Remarks]
  • URL: http://www-sk.icrr.u-tokyo.ac.jp/xmass
• [Remarks]
  • URL: http://www-sk.icrr.u-tokyo.ac.jp/xmass
• [Remarks]
  • URL: http://www-sk.icrr.u-tokyo.ac.jp/xmass