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Direct measurement of Ps Hyper Fine Structure using sub THz

Research Project

Project/Area Number 20340049
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

ASAI Shoji  The University of Tokyo, 大学院・理学系研究科, 准教授 (60282505)

Co-Investigator(Kenkyū-buntansha) 出原 敏孝  福井大学, 遠赤外領域開発研究センター, 特任教授 (80020197)
齋藤 晴雄  東京大学, 大学院・総合文化研究科, 准教授 (60235059)
Co-Investigator(Renkei-kenkyūsha) KOBAYASHI Tomio  東京大学, 素粒子物理国際研究センター, 教授 (50126059)
NAMBA Toshio  東京大学, 素粒子物理国際研究センター, 助教 (40376702)
SAITO Haruo  東京大学, 総合文化研究科, 准教授 (60235059)
IDEHARA Toshitaka  福井大学, 遠赤外領域開発研究センター, 特任教授 (80020197)
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2008: ¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
Keywordsポジトロニウム / 量子電磁気学 / テラヘルツ波 / 超微細構造 / ジャイロトロン
Research Abstract

Positronium is an ideal system for the research of the bound state QED. The hyperfine splitting of positronium (Ps-HFS, about 203 GHz) is an important observable but all previous measurement Ps-HFS employed static magnetic field and measured Ps-HFS indirectly using Zeeman splitting. We propose new method to measure Ps-HFS directly using sub-THz radiation. We developed an optical system to accumulate high power (about 10 kW) radiation in a Fabry-Perot resonant cavity and observed the positronium hyperfine transition for the first time.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (47 results)

All 2011 2010 2009 2008 Other

All Journal Article (19 results) (of which Peer Reviewed: 4 results) Presentation (27 results) Remarks (1 results)

  • [Journal Article] First direct measurement of positronium hyperfine splitting with sub-THz light2011

    • Author(s)
      浅井祥仁, et al.
    • Journal Title

      ArXiv 1105

      Pages: 4392-4392

    • Related Report
      2010 Final Research Report
  • [Journal Article] Probing the Energy Structure of Positronium with a 203 GHz Fabry-Perot Cavity2010

    • Author(s)
      浅井祥仁, et al.
    • Journal Title

      J.Phys.Conf.Ser. 199

      Pages: 12002-12002

    • Related Report
      2010 Final Research Report
  • [Journal Article] Precise measurement of Hyper Fine Structure of positronium using sub-THz light2010

    • Author(s)
      浅井祥仁, et al.
    • Journal Title

      ArXiv 1003

      Pages: 4324-4324

    • Related Report
      2010 Final Research Report
  • [Journal Article] Probing the Energy Structure of Positrnium with a 203 GHz Fabry-Perot Cavity2010

    • Author(s)
      S.Asai, et al
    • Journal Title

      J.Phys.Conf.Ser.199

      Volume: 199 Pages: 12002-12002

    • Related Report
      2010 Annual Research Report
  • [Journal Article] Precise measurement of Hyper Fine Structure of positronium using sub-THz light2010

    • Author(s)
      S.Asai, et al
    • Journal Title

      ArXiv

      Volume: 1003 Pages: 4324-4324

    • Related Report
      2010 Annual Research Report
  • [Journal Article] Application of Gyrotron : Precision measurement of Positronium HFS2010

    • Author(s)
      S.Asai
    • Journal Title

      arXiv 1003. 4324

      Pages: 8-8

    • Related Report
      2009 Annual Research Report
  • [Journal Article] Review of Subterahertz and Terahertz Gyrodevices at IAP RAS and FIR FU2009

    • Author(s)
      V.Bratman, M.Glyavin, T.Idehara, et al.
    • Journal Title

      IEEE Trans.Plasma Sci. 37-1

      Pages: 36-43

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] ポジトロニウムの新たな謎2009

    • Author(s)
      浅井祥仁
    • Journal Title

      パリティ 24

      Pages: 4-11

    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Journal Article] Review of Subterahprtz and Terahertz Gyrodevices at IAP RAS and FIR FU2009

    • Author(s)
      V.Bratman, M.Glyavin, T.Idehara et al.
    • Journal Title

      IEEE Trans.Plasma Sci 37-1

      Pages: 36-43

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The potential of the gyrotrons for development of the sub-terahertz and the terahertz range-a review of novel and prospective application2008

    • Author(s)
      T.Idehara, T, Saito, et al.
    • Journal Title

      Thin Solid Films 517

      Pages: 1503-1506

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Development of THz gyrotrons and application to high power THz technologies2008

    • Author(s)
      T.Idehara, I.Ogawa, T, Saito, et al.
    • Journal Title

      Terahertz Science and Technologies 1-1

      Pages: 100-106

    • Related Report
      2010 Final Research Report
  • [Journal Article] Precision measurements of positronium decay rate and energy level2008

    • Author(s)
      S.Asai, Y.Kataoka, T.Kobayashi, T.Namba, T.Suehara, G.Akimoto, A.Ishida, M.M.Hashimoto, H.Saito, T.Idehara, M.Yoshida
    • Journal Title

      AIP Conference Proceedings 1037

      Pages: 43-55

    • Related Report
      2010 Final Research Report
  • [Journal Article] ポジトロニウムの超微細構造の精密測定2008

    • Author(s)
      難波俊雄, 末原大幹
    • Journal Title

      高エネルギーニュース 27

      Pages: 100-108

    • Related Report
      2010 Final Research Report
  • [Journal Article] サブテラヘルツ波を用いた束縛系QED の精密検証2008

    • Author(s)
      浅井祥仁
    • Journal Title

      J.Plasma Fusion Res. 27

      Pages: 902-905

    • Related Report
      2010 Final Research Report
  • [Journal Article] サブテラヘルツ波を用いた束縛系QEDの精密検証2008

    • Author(s)
      浅井祥仁
    • Journal Title

      J.Plasma Fusion Res 84

      Pages: 902-905

    • Related Report
      2008 Annual Research Report
  • [Journal Article] ポジトロニウムの超微細構造の精密測定2008

    • Author(s)
      難波俊雄、末原大幹
    • Journal Title

      高エネルギーニュース 27

      Pages: 100-108

    • Related Report
      2008 Annual Research Report
  • [Journal Article] Precision measurements of positronium decay rate and energy 1eve12008

    • Author(s)
      S.Asai, Y.Kataoka, T.Kobayashi, T.Namba, T.Suehara, G.Akimoto, A.Ishida, M.M, Hashimoto, H.Saito, T.Idehara and M.Yoshida
    • Journal Title

      AIP conference Proceedings 1037

      Pages: 43-55

    • Related Report
      2008 Annual Research Report
  • [Journal Article] Development of THz gyrotrons and application to high power THz technologies2008

    • Author(s)
      T.Idehara, I.Ogawa, T.Saitoet a1.
    • Journal Title

      Terahertz science and Technologies 1-1

      Pages: 100-106

    • Related Report
      2008 Annual Research Report
  • [Journal Article] he potential of the gyrotrons for development of the sub-terahertz and the terahertz range-a review of novel and prospective application2008

    • Author(s)
      T.Idehara, T.Saito et al.
    • Journal Title

      Thin Solid Films 517

      Pages: 1503-1506

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] Application of Gyrotron: Precision measurement of Positronium HFS2010

    • Author(s)
      S.Asai
    • Organizer
      The 3rd International Workshop on Far-Infrared Technologies 2010
    • Place of Presentation
      福井大学
    • Related Report
      2010 Final Research Report
  • [Presentation] Application of Gyrotron : Precision measurement of Positronium HFS2010

    • Author(s)
      S.Asai
    • Organizer
      The 3rd International Workshop on Far-Infrared Technologies 2010
    • Place of Presentation
      福井大学
    • Related Report
      2009 Annual Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定I(全体と本測定の準備)2009

    • Author(s)
      石田明
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定II(テスト測定でのRF システム)2009

    • Author(s)
      秋元銀河
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
    • Related Report
      2010 Final Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定III(ミリ波を用いた直接遷移実験)2009

    • Author(s)
      難波俊雄
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] ポジトロニウムの超微細構造測定のためのGyrotron FU CW V2009

    • Author(s)
      漆崎裕一
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定II(テスト測定でのRFシステム)2009

    • Author(s)
      秋元銀河
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
    • Related Report
      2008 Annual Research Report
  • [Presentation] Precise measurement of HFS of Positronium2009

    • Author(s)
      石田明
    • Organizer
      The Workshop on Low Energy Positron and Positronium Physics
    • Place of Presentation
      カナダ・トロント
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] Probing the Energy Structure of Positronium with a 203 GHz Fabry-Perot Cavity2009

    • Author(s)
      末原大幹
    • Organizer
      The Workshop on Low Energy Positron and Positronium Physics
    • Place of Presentation
      カナダ・トロント
    • Related Report
      2010 Final Research Report
  • [Presentation] Precise measurement of HFS of Positronium2009

    • Author(s)
      石田明
    • Organizer
      XXVI International Conference on Photonic, Electronic, and Atomic Collisions
    • Place of Presentation
      アメリカ・ミシガン
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] The First Direct Measurement of the Hyperfine Splitting of Positronium2009

    • Author(s)
      末原大幹
    • Organizer
      XXVI International Conference on Photonic, Electronic, and Atomic Collisions
    • Place of Presentation
      アメリカ・ミシガン
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] Probing the Energy Structure of Positronium with a 203GHz Fabry-Perot Cavity2009

    • Author(s)
      T.Suehara
    • Organizer
      The Workshop on Low Energy Positron and Positronium Physics
    • Place of Presentation
      カナダ・トロント
    • Related Report
      2009 Annual Research Report
  • [Presentation] ポジトロニウムのHFS 精密測定II Zeeman を用いた方法のテスト実験の報告2008

    • Author(s)
      石田明
    • Organizer
      京都大学原子炉実験所専門委員会「陽電子科学とその理工学への応用」
    • Place of Presentation
      京都大学原子炉実験所
    • Year and Date
      2008-12-05
    • Related Report
      2010 Final Research Report
  • [Presentation] ポジトロニウムのHFS精密測定II Zeemanを用いた方法のテスト実験の報告2008

    • Author(s)
      石田明
    • Organizer
      京都大学原子炉実験所専門研究会「陽電子科学とその理工学への応用」
    • Place of Presentation
      京都大学原子炉実験所
    • Year and Date
      2008-12-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定I(全体とRF-Cavity)2008

    • Author(s)
      秋元銀河
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-21
    • Related Report
      2010 Final Research Report
  • [Presentation] Positronium assembly system for the precise measurement of the Positronium hyper-fine splitting2008

    • Author(s)
      Mark M.Hashimoto
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-21
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定III(ガンマ線検出器)2008

    • Author(s)
      石田明
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-21
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] サブテラヘルツ波を用いたポジトロニウム超微細構造の直接測定2008

    • Author(s)
      末原大幹
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-21
    • Related Report
      2010 Final Research Report 2008 Annual Research Report
  • [Presentation] ポジトロニウム超微細構造の精密測定1(全体とRF-Cavity)2008

    • Author(s)
      秋元銀河
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-21
    • Related Report
      2008 Annual Research Report
  • [Presentation] High power CW THz radiation sources-Gyrotron FU CW Series for application to high power THz technologies2008

    • Author(s)
      T.Idehara
    • Organizer
      Int.Symposium on Terehertz between Japan and Sweden
    • Place of Presentation
      首都大学東京
    • Year and Date
      2008-05-27
    • Related Report
      2010 Final Research Report
  • [Presentation] A high power THz radiation source-Gyrotron FU CW III for high power THz Technologies2008

    • Author(s)
      T.Idehara, I.Ogawa, H.Mori, S.Kobayashi, S.Mitsudo, T.Saito
    • Organizer
      2^<nd> Japan-Korea Joint Workshop on THz Technology
    • Place of Presentation
      コンファレンススクエアエムプラス
    • Related Report
      2010 Final Research Report
  • [Presentation] Design of Gyrotron FU CW V for Acurate Measurement of Positronium Energy Level2008

    • Author(s)
      La Agusu, T.Idehara, et al
    • Organizer
      The 33rd International Conference on Infrared, Millimeter, and Terahertz Waves
    • Place of Presentation
      カリフォルニア・アメリカ
    • Related Report
      2010 Final Research Report
  • [Presentation] Development and application of THz gyrotrons2008

    • Author(s)
      T.Idehara
    • Organizer
      7 th Int.Workshop on Strong Microwaves: Sources and Applications
    • Place of Presentation
      ロシア・ニジニノヴゴロド
    • Related Report
      2010 Final Research Report
  • [Presentation] High power CW THz radiation sources-Gyrotron FU CW Series for application to high power THz technologies2008

    • Author(s)
      T.Idehara
    • Organizer
      Int.Symposium on Terehertz between Japan and Sweden
    • Place of Presentation
      Tokyo, Japan
    • Related Report
      2008 Annual Research Report
  • [Presentation] Development and application of THz gyrotrons2008

    • Author(s)
      T.Idehara
    • Organizer
      7th Int,Workshop on Strong Microwaves:Sources and Applications
    • Place of Presentation
      Nizhny Novgorod, Russia
    • Related Report
      2008 Annual Research Report
  • [Presentation] Design of Gyrotron FU CW V for Acurate Measurement of Positronium Energy Leve12008

    • Author(s)
      La Agusu, T.Idehara et al.
    • Organizer
      The 33rd International Conference on Infrared, Millimeter, and Terahertz Waves
    • Place of Presentation
      California, USA
    • Related Report
      2008 Annual Research Report
  • [Presentation] A high power THz radiation source-Gyrotron FU CW III for high power TH ztechnologies2008

    • Author(s)
      T.Idehara, I.Ogawa, H.Mori, S.Kobayashi, S,Mitsudo and T.Saito
    • Organizer
      2nd Japan-Korea Joint Workshop on THz Technolog
    • Place of Presentation
      Tokyo, Japan
    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://tabletop.icepp.s.u-tokyo.ac.jp/Tabletop_experiments/Home.html

    • Related Report
      2009 Annual Research Report

URL: 

Published: 2008-04-01   Modified: 2016-04-21  

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