Study of Dark Matter

2011 Fiscal Year Final Research Report

• 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
• Keywords: 暗黒物質 / 液体キセノン / 宇宙線 / 宇宙物理 / 素粒子実験

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] 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] 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] 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
• [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] 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] 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] 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] GLA2011 (2011)
  • Author(s): 竹田敦
  • Organizer: XMASS
  • Place of Presentation: Jyvaaskylaa, Finland
  • Year and Date: 2011-06-05
• [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] DUSEL workshop (2010)
  • Author(s): 安部航
  • Organizer: Status of XMASS
  • Place of Presentation: Homestake, USA
  • 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] LRT2010 (2010)
  • Author(s): 竹田敦
  • Organizer: XMASS
  • Place of Presentation: Sadbury, Canada
  • Year and Date: 2010-08-28
• [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] 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] 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] IDM2009 (2008)
  • Author(s): 鈴木洋一郎
  • Organizer: XMASS
  • Place of Presentation: Stockholm, Sweden
  • Year and Date: 2008-08-19
• [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
• [Remarks]
  • URL: http://www-sk.icrr.u-tokyo.ac.jp/xmass