Detection of Ultra-High-Energy Cosmic Ray using radio telescopes

• Project/Area Number: 24340059
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Konan University
• Principal Investigator: yamamoto tokonatsu 甲南大学, 理工学部, 教授 (40454722)
• Co-Investigator(Kenkyū-buntansha): OGIO Shouiti 大阪市立大学, 理学研究科, 教授 (20242258) ; AKIMUNE Hidetoshi 甲南大学, 理工学部, 教授 (60319829) ; SAKO Takashi 名古屋大学, 宇宙地球環境研究所, 講師 (90324368)
• Co-Investigator(Renkei-kenkyūsha): TERASAWA Toshio 東京大学, 宇宙線研究所, 教授 (30134662) ; IKEDA Daisuke 東京大学, 宇宙線研究所, 特任研究員 (60584258) ; TAKEDA Masahiro 東京大学, 宇宙線研究所, 助教 (40360581)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000); Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2014: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2013: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2012: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
• Keywords: 最高エネルギー宇宙線 / マイクロ波 / 宇宙観測 / 空気シャワー / 宇宙線 / 宇宙線観測

Outline of Final Research Achievements

To develop a next-generation observation method of the ultra-high energy cosmic rays, we have tried to detect isotropic microwave radiation from air showers. A microwave detector based on 1.2 m parabola antennas with 12 GHz receivers have been developed. An electron light source (ELS) which is located at the Telescope Array Observatory in Utah, USA are used. To simulate extensive air showers, the ELS emits an electron beam into the atmosphere and the parabola antenna system is used to measure the microwave radiation from the electron beam. Based on this measurement, an upper limit on the intensity of a 12.5 GHz microwave radiation from air shower was estimated. In this measurement, a wide angle radiation around the beam exit was detected. This radiation can be explained by a rapid appearance of electric field. Application of this radiation to the cosmic-ray observation is under a study.

Research Products

• [Int'l Joint Research] University of Utah(米国)
• [Int'l Joint Research] Hanyang University(韓国)
• [Int'l Joint Research] Vrije Universiteit(Brussel)
• [Journal Article] Measurement of microwave radiation from electorn beam in the atmosphere (2016)
  • Author(s): I.S.Ohta, H.Akimune, M.Fukushima, D.Ikeda, Y.Inome, J.N.Matthews,S.Ogio, H.Sagawa, T.Sako, TShibata,T.
  • Journal Title: NIM A Volume: 810 Pages: 44-50
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Search for isotropic microwave radiation from electron beam in the atmosphere (2015)
  • Author(s): T.Yamamoto, I Ohota, Y.Inome, D.Ikeda, H.Sagawa, S.Ogio, T.Sako, T.Shibata, J.N.Mattherws
  • Journal Title: Proc.of the 34th international Cosmic Ray Conference (2015) Volume: --
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Study of Isotropic Radiation of Microwave from Air Showers – toward Future Observation of Ultra-High-Energy Cosmic Ray – (2015)
  • Author(s): T. Yamamoto et.al.
  • Journal Title: The Institute of Electronics, Information and Communication Engineers Technical Report Volume: WPT2014-105 Pages: 61-64
  • NAID: 110010021651
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Three Experiments to Detect Microwave emission from Extensive Airshowers through Molecular Bremsstrahlung Radiation (2014)
  • Author(s): T. Yamamoto, H. Akimune, M. Fukushima, J. N. Matthews, S. Ogio, I. Ohota, H. Sagawa, T. Sako, N. Sakurai, T. Shibata, M. Takeda, T. Terasawa
  • Journal Title: Proc. of the 33th International Cosmic Ray Conference Volume: --
• [Journal Article] Search for molecular bremsstrahlung radiation signals in Ku band with coincidental operations of radio telescopes with air shower detectors (2013)
  • Author(s): S. Ogio, T. Yamamoto, K. Kuramoto, T. Iijima, H. Akimune, T. Fujii, N. Sakurai, M. Fukushima, and H. Sagawa
  • Journal Title: Conf. Ser. 23rd European Cosmic Ray Symposium Volume: 409 Pages: 012091-012094
• [Presentation] Detection of radio emissions ranging over broad frequencies by appearances of electron beams (2015)
  • Author(s): 山本常夏、大田泉、池田大輔、佐川宏行、福島正己、荻尾彰一、Romain Gaior, 間瀬圭一、吉田滋、石原安野、Matthew Relich, 桑原孝夫、上山俊佑、Bokkyun Shin, Gordon Thomson, Jon N. Matthews, 桑田達伸
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪市立大学杉本キャンパス (大阪市)
  • Year and Date: 2015-09-25
• [Presentation] Signal Intensity of Sudden Birth at 12.5 GHz (2015)
  • Author(s): Tokonatsu Yamamoto
  • Organizer: Sudden Birth meeting
  • Place of Presentation: Chiba University (千葉県千葉市)
  • Year and Date: 2015-09-14
  • Int'l Joint Research
• [Presentation] 空気シャワーから放出されるマイクロ波検出に関する研究 (2015)
  • Author(s): 山本常夏
  • Organizer: 通信学会WPT研究会
  • Place of Presentation: 京都大学(京都府宇治市)
  • Year and Date: 2015-03-24 – 2015-03-25
• [Presentation] 空気シャワーから放射されるマイクロ波の探索III (2015)
  • Author(s): 大田泉
  • Organizer: 天文学会
  • Place of Presentation: 大阪大学(大阪府豊中市)
  • Year and Date: 2015-03-18 – 2015-03-21
• [Presentation] Study of Molecular Bremsstrahlung Radiation from electron beams (2015)
  • Author(s): 山本常夏
  • Organizer: Workshop for Observation of Radio Emission from Air-shower 2015
  • Place of Presentation: 東京大学宇宙線研究所(千葉県柏市)
  • Year and Date: 2015-03-08
• [Presentation] 空気シャワーから放射されるマイクロ波の探索⑨ (2014)
  • Author(s): 山本常夏
  • Organizer: 物理学会
  • Place of Presentation: 佐賀大学(佐賀県佐賀市)
  • Year and Date: 2014-09-18 – 2014-09-21
• [Presentation] 電波望遠鏡による最高エネルギー宇宙線検出実験の進展 (2014)
  • Author(s): 山本常夏
  • Organizer: 第14回ミリ波サブミリ波受信機ワークショップ
  • Place of Presentation: 茨城大学(茨城県水戸市)
  • Year and Date: 2014-04-03 – 2014-04-04
  • Invited
• [Presentation] 空気シャワーから放射されるマイクロ波の探索VIII (2012)
  • Author(s): 山本常夏
  • Organizer: 日本物理学会 第68回年次大会 広島大
  • Place of Presentation: 広島大学
  • Year and Date: 2012-09-27
• [Presentation] DeveIopment of a 12 Parabola Observation System to Detect Molecular Bremsstrahlung Radiation from Air-showers (2012)
  • Author(s): 山本常夏
  • Organizer: Acoustic and Radio EeV Neutrino Detection Activities 2012
  • Place of Presentation: ドイツ・エルランゲン
  • Year and Date: 2012-06-21
• [Presentation] 空気シャワーから放射されるマイクロ波の探索
  • Author(s): 大田泉
  • Organizer: 日本天文学会2013秋季年会
  • Place of Presentation: 東北大学
• [Presentation] 空気シャワーから放射されるマイクロ波の探索II
  • Author(s): 大田泉
  • Organizer: 日本天文学会2014春季年会
  • Place of Presentation: 国際基督教大学
• [Presentation] 空気シャワー電波的観測
  • Author(s): 荻尾彰一
  • Organizer: 空気シャワー電波観測ワークショップ2014
  • Place of Presentation: 甲南大学
• [Presentation] 高周波観測
  • Author(s): 大田泉
  • Organizer: 空気シャワー電波観測ワークショップ2014
  • Place of Presentation: 甲南大学
• [Presentation] 広帯域測定計画
  • Author(s): 山本常夏
  • Organizer: 空気シャワー電波観測ワークショップ2014
  • Place of Presentation: 甲南大学
• [Remarks] WS for Observation of Radio Emission from AS 2015
  • URL: http://aplabConfluence.konan-u.ac.jp/x/NwEm
• [Remarks] 甲南大学 空気シャワーアレイ
  • URL: http://aplabconfluence.konan-u.ac.jp/pages/viewpage.action?pageId=2195504
• [Remarks] 甲南電波望遠鏡アレイ
  • URL: http://aplabconfluence.konan-u.ac.jp/pages/viewpage.action?pageId=1769544
• [Remarks] 甲南大学・12素子電波望遠鏡アレイ
  • URL: http://aplabconfluence.konan-u.ac.jp/pages/viewpage.action?pageId=1769544
• [Remarks] 空気シャワー電波観測ワークショップ2014
  • URL: http://aplabConfluence.konan-u.ac.jp/x/BAAb
• [Funded Workshop] Sudden Birth Meeting (2015)
  • Place of Presentation: Chiba University (千葉県千葉市)
  • Year and Date: 2015-09-14