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2000 Fiscal Year Final Research Report Summary

Search for Dark Matter Axions

Research Project

Project/Area Number 09102010
Research Category

Grant-in-Aid for Specially Promoted Research

Allocation TypeSingle-year Grants
Review Section Physics
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

MATSUKI Seishi  Institute for Chemical Research, Kyoto University, Associate Professor, 化学研究所, 助教授 (50037941)

Co-Investigator(Kenkyū-buntansha) FUNAHASHI Haruhiko  School of Science, Kyoto University, Research Associate, 理学研究科, 助手 (00283581)
YAMAMOTO Katsuji  School of Engineering, Kyoto University, Associate Professor, 工学研究科, 助教授 (90191395)
Project Period (FY) 1997 – 2002
KeywordsUniverse / Dark Matter / Axion / Rydberg atoms / Microwave detection / Microwave cavity
Research Abstract

Identification of dark matter in the Universe is one of the most important issues in Particle physics as well as Astrophysics. Axion is the leading candidate for the cold dark matter particles with neutralinos. We developed the Rydberg-atom cavity detector to search for dark matter axions where the axions are converted into microwave photons in resonant cavity permeated by a strong magnetic field and then the photons are absorbed by highly excited Rydberg atoms. Excited Rydberg atoms are then field ionized and detected. The cavity and the related detectors are cooled down to 10 mK range to suppress the thermal blackbody photons in the cavity with a dilution refrigerator. Based on the prototype apparatus CARRACK1, a large scale apparatus CARRACK2 was constructed with which axions with a wide range of mass can be searched for. Axion at 10 μeV mass was searched, in which the covered axion mass range is about 8%. Further search for lighter mass of axions is in progress. At the same time we made effort to improve various part of the apparatus to get higher detection efficieny. One of such improvements resulted from the use of the pulsed electric field for the field ionization. Quite selective ionization scheme thus enabled us to continue the search experiment more efficiently. We will search for axions further in a wide range of mass with this detector system.

  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] M.Tada, S.Matsuki, K.Yamamoto, et al.: "CARRACK2-a new large-scale experiment to search for axions with Rydberg-atom cavity detector-"Proceedings of the International Workshop on axions, Gainsville , Florida, March 13-15,1998. Nuclear Physics B.. 72. 164-168 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yamamoto and S.Matsuki: "Quantum analysis of the Rydberg atom cavity detector for dark matter axions"Proceedings of the International Workshop on axions, Gainsville, Florida, March 13-15,1998. Nuclear Physics B. 72. 132-136 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S,Matsuki, H.Funahashi, K.Yamamoto, et al.: "Progress in Kyoto axion search experiment."Proceedings of the International Symposium on the Identification of Dark Matter in the Universe, Buxton, UK, September 7-11,1998. 441-446 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yamamoto and S.Matsui: "Quantum analysis of Rydberg atom cavity deetector for dark matter axion search"Proceedings of the International Symposium on the Identification of Dark Matter in the Universe, Buxton, UK, September 7-11;1998. 474-479 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Kishimoto, S.Matsuki, H.Funahashi, K.Yamamoto, et al.: "The CARRACK2 axion experiment"Proceedings of the International Symposium on the Identification of Dark Matter in the Universe, Buxton, UK, September 7-11,1998. 636-641 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yamamoto, S.Matsuki and I.Ogawa: "Quantum calculationson axion-photon-Rydberg interactions in resonant cavities"Proceedings of the International Symposium on Dark Matter in the Universe and Its Direct Detection. 129-134 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Ogawa, K.Yamamot, and S.Matsuki et al.: "Search for dark matter axions with Rydberg atoms in resonant cavities"Proceedings of the International Symposium on the Dark Matter in the Universe and Its Direct Detection. 175-180 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yamamoto and S.Matsuki et al.: "The Rydberg-atom-cavity axion search"Proceedings of the International Workshop on Dark Matter in the Universe. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masaru Tada: "Coherent time evolution of highly excited Rydberg states in pulsed electric field.: opening a stringent way to selectively field-ionize the highly excited states."Memoirs of the Faculty of Science, Kyoto University, Series of Physics, Astrophysics. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kitagawa, K.Yamamoto and S.Matsuki: "Quantum analysis of Rydberg atom cavity deetector for dark matter axion search"Phys.Rev.D. (to be published). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Tada, S.Matsuki et a.: "Axion Search Experiment in Kyoto"International Symposium on the Nuclear Electro-Weak Process for Symmetry and Electroweak Nuclear Process. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Yamamoto, S.Matsuki and I.Ogawa: "Quantum calculations on axion-photon-Rydberg interactions in resonant cavities."Proceedings of the second RESCEU International Symposium on Dark Matter in the Universe and its Direct Detection, Nov., 1996, Tokyo, ed.M.Minowa (Universal Academy Press, Tokyo). (1997)

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      「研究成果報告書概要(欧文)」より
  • [Publications] I.Ogawa, Y.Kishimoto, M.Tada, S.Matsuki, K.Yamamoto, A.Masaike, S.Watanabe, and M.Matsuzawa: "Search for Dark Matter Axions with Rydberg Atoms in Resonant Cavities."Proceedings of the second RESCEU International Symposium on Dark Matter in the Universe and its Direct Detection, Nov., 1996, Tokyo, ed.M.Minowa (Universal Academy Press, Tokyo). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Tada, Y.Kishimoto, K.Kominato, M.Shibata, H.Funahashi, K.Yamamoto, A.Masaike and S.Matsuki: "CARRACK II-a new large-scale experiment to search for axions with Rydberg-atom cavity detector."Nucl.Phys.. B72. 233 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Yamamoto and S.Matsuki: "Quantum analysis of the Rydberg-atom cavity detector of dark matter axions."Nucl.Phys.. B72. 132 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Matsuki, M.Tada, Y.Kishimoto, M.Shibata, K.Kominato, C.Ooishi, H.Funahashi, K.Yamamoto and A.Masaike: "Progress in Kyoto axion search experiment."Proceedings of the Second International Workshop on the Identification of Dark Matter, Buxton UK, 1998, eds.N.J.Spooner and V.Kudryatsev, (World Scientific, Singapore). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Yamamoto and S.Matsuki: "Quantum Analysis of Rydberg-atom Cavity Detector for Dark Matter Axion Search."Proceedings of the Second International Workshop on the Identification of Dark Matter, Buxton UK, 1998, eds.N.J.Spooner and V.Kudryatsev, (World Scientific, Singapore). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kishimoto, M.Tada, M.Shibata, K.Kominato, C.Ooishi, H.Funahashi, K.Yamamoto, A.Masaike and S.Matsuki: "The CARRACK-2 Axion Experiment."Proceedings of the Second International Workshop on the Identification of Dark Matter, Buxton UK, 1998, eds.N.J.Spooner and V.Kudryatsev, (World Scientific, Singapore). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Tada, Y.Kishimoto, M.Shibata, K.Kominato, H.Funahashi, K.Yamamoto, A.Masaike and S.Matsuki: "Axion Search Experiment in Kyoto."International Symposium on the Nuclear Electro-Weak Process for Symmetries and Electroweak Nuclear Process, Osaka Japan. (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Yamamoto, M.Tada, Y.Kishimoto, K.Kominato, M.Shibata, C.Ooishi, S.Yamamda, T.Saida, H.Funahashi, A.Masaike and S.Matsuki: "The Rydberg-Atom-Cavity Axion Search."International Symposium on the Dark Matter in the Universe, Heidelberg Germany. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masaru Tada: "Coherent time evolution of highly excited Rydberg states in pulsed electric field : opening a stringent way to selectively field-ionize the highly excited states."Memoirs of the Faculty of Science, Kyoto University, Series of Physics, Astrophysics. (in press.). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Kitagawa, K.Yamamoto and S.Matsuki: "Quantum analysis of Ryderg-atom cavity detector for dark matter search."Phys.Rev.D. (to be published ; ) LANL-Preprint Archive, hep/ph-9908445..

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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