Study on short term variation of primary cosmic-ray spectrum with long duration balloon flight

• Project/Area Number: 19340070
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: YOSHIMURA Koji High Energy Accelerator Research Organization, 素粒子原子核研究所, 准教授 (50272464)
• Co-Investigator(Kenkyū-buntansha): HASEGAWA Masaya 高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (60435617) ; YAMAMOTO Akira 高エネルギー加速器研究機構, 超伝導低温工学センター, 教授 (30113418) ; MAKIDA Yasuhiro 高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (30199658)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000); Fiscal Year 2009: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2008: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2007: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
• Keywords: BESS-Polar / 南極周回飛翔 / 一次宇宙線 / 気球実験 / 太陽活動 / 太陽風 / 太陽変調 / 短期過渡変動 / BESS / 太陽の自転 / 短期変動 / 太陽フレア / ガスコントロール

Research Abstract

BESS-Polar II experiment was successfully carried out with the improved instruments which enabled precise measurement of daily variation of the primary cosmic-ray spectrum. During 24.5 day scientific observation, about 47 billion cosmic-ray events were observed. After detailed calibration using precise temperature and pressure data, we have obtained the precision proton spectra for the entire flight duration. We have successfully studied daily variation of proton spectrum and investigated its correlation with solar wind.

Research Products

• [Journal Article] 第2回南極周回飛翔宇宙線観測実験: BESS-Polar II報告 (2010)
  • Author(s): 吉村浩司、長谷川雅也、槙田康博、山本明、(30名、1番目)
  • Journal Title: 宇宙航空研究開発機構研究開発報告:大気球研究報告 JAXA-RR-09-007 Pages: 31-51
  • Peer Reviewed
• [Journal Article] 第2回南極周回飛翔宇宙線観測実験」宇宙航空研究開発機構研究開発報告 (2010)
  • Author(s): K.Yoshimura
  • Journal Title: 宇宙航空開発機構研究開発報告・大気球研究報告 (印刷中)
  • Peer Reviewed
• [Journal Article] The BESS-Polar Ultra-Thin Superconducting Solenoid Magnet and Its Operational Characteristics During Long-Duration Scientific Ballooning Over Antarctica (2009)
  • Author(s): Y. Makida, 山本明, 吉村浩司, M. Hasegawa, et al.,(19名、3番目)
  • Journal Title: IEEE Trans. Applied Superconductivity 19 Pages: 1315-1319
  • Peer Reviewed
• [Journal Article] BESS-Polar Experiment-Progress and Future Prospect (2009)
  • Author(s): 吉村浩司, M. Hasegawa, Y. Makida, 山本明, et al.,(30名、1番目)
  • Journal Title: Proc. Int. Workshop Advances in Cosmic Ray Sci., J. Phys. Soc. Japan 78 Pages: 29-34
  • Peer Reviewed
• [Journal Article] The second Antarctic flight of BESS-Polar experiment : Flight summary and Detector performance. (2009)
  • Author(s): K.Yoshimura, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] Precise measurement of the cosmic-ray proton spectrum and the time variation with BESS-Polar I (2009)
  • Author(s): R.Orito, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] BESS-Polar II : Fiber readout Time of Flight system (2009)
  • Author(s): A.Horikoshi, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] The Time of Flight System for BESS-Polar II (2009)
  • Author(s): N.Thakur, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] Antiproton identification with BESS Polar-II Aerogel Cherenkov Counter (2009)
  • Author(s): K.Sakai, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] hort-term and diurnal proton flux variation during the BESS-Polar I balloon flight (2009)
  • Author(s): T.Hams, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] Measurements of Cosmic-Ray Hydrogen and Helium Isotopes with BESS-Polar I in 2004 (2009)
  • Author(s): K.C.Kim, et al.
  • Journal Title: Proceedings of 31^<st> ICRC 電子媒体
• [Journal Article] Progress in BESS-Polar II experiment and the data analysis (2009)
  • Author(s): K.Sakai, et al.
  • Journal Title: Proceedings of the 27^<th> ISTS 電子媒体
  • Peer Reviewed
• [Journal Article] BESS-Polar experiment : Progress and future prospects (2008)
  • Author(s): 吉村浩司, M. Hasegawa, Y. Makida, 山本明, et al.,(33名、1番目)
  • Journal Title: Advances in Space Research 42 Pages: 1664-1669
  • Peer Reviewed
• [Journal Article] Measurement of cosmic-ray low-energy antiproton spectrum with the first BESS-Polar Antarctic flight (2008)
  • Author(s): K. Abe, et al.
  • Journal Title: Phys. Lett. B 670 Pages: 103-108
  • Peer Reviewed
• [Journal Article] BESS-Polar experiment : Progress and future prospects (2008)
  • Author(s): K. Yoshimura, et al.
  • Journal Title: Advances in Space Research 42 Pages: 1664-1669
  • Peer Reviewed
• [Journal Article] Search for primordial antiparticles with BESS (2008)
  • Author(s): A. Yamamoto, et al.
  • Journal Title: Advances in Space Research 42 Pages: 442-449
  • Peer Reviewed
• [Journal Article] Search for antihelium : Progress with BESS (2008)
  • Author(s): M. Sasaki, et al.
  • Journal Title: Advances in Space Research 42 Pages: 450-454
  • Peer Reviewed
• [Journal Article] Search for fractionally charged particles in cosmic rays with the BESS spectrometer (2008)
  • Author(s): H. Fuke, et al.
  • Journal Title: Advances in Space Research 41 Pages: 2050-2055
  • Peer Reviewed
• [Journal Article] The BESS Program (2007)
  • Author(s): A.Yalnamoto, et. al.
  • Journal Title: Nucl.Phys.B(Proc.Suppl.) 166 Pages: 62-67
  • Peer Reviewed
• [Journal Article] BESS-Polar experiment:Progress and Future Prospects
  • Author(s): K.Ybshimrua, et. al.
  • Journal Title: Adv.Space Res (In press)
  • Peer Reviewed
• [Presentation] BESS-Polar II実験:低エネルギー宇宙線反陽子捕捉の為のファイバーライトガイド薄型TOFカウンターの性能評価 (2010)
  • Author(s): 堀越篤, 他
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-23
• [Presentation] BESS Polar-II実験反陽子流束解析報告(4)-太陽活動極小期における宇宙線反陽子流束- (2010)
  • Author(s): 坂井賢一, 他
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] BESS-Polar II測定器回収ミッション報告 (2010)
  • Author(s): 吉村浩司
  • Organizer: 大気球シンポジウム
  • Place of Presentation: 宇宙航空研究開発機構宇宙科学研究所
• [Presentation] Search for novel origins of cosmic-ray antiprotons and antimatter with BESS-Polar flight over Antarctica. (2010)
  • Author(s): 吉村浩司
  • Organizer: 35th ICHEP
  • Place of Presentation: Paris
• [Presentation] Search for Cosmic-ray Antiproton Origins and for Cosmological Antimatter with BESS (2010)
  • Author(s): 吉村浩司
  • Organizer: 38th COSPAR Scientific Assembly
  • Place of Presentation: Bremen
• [Presentation] BESS-Polar IIフライトと測定器性能 (2009)
  • Author(s): 吉村浩司, 他
  • Organizer: 大気球シンポジウム
  • Place of Presentation: JAXA/宇宙科学研究本部
  • Year and Date: 2009-10-01
• [Presentation] BESS-Polar IIファイバー読み出し型TOFの性能評価 (2009)
  • Author(s): 堀越篤, 他
  • Organizer: 大気球シンポジウム
  • Place of Presentation: JAXA/宇宙科学研究本部
  • Year and Date: 2009-10-01
• [Presentation] BESS-Polar II粒子識別性能と反陽子の同定 (2009)
  • Author(s): 坂井賢一, 他
  • Organizer: 大気球シンポジウム
  • Place of Presentation: JAXA/宇宙科学研究本部
  • Year and Date: 2009-10-01
• [Presentation] BESS-Polar II太陽電池システムのフライトにおける性能評価 (2009)
  • Author(s): 長谷川雅也, 他
  • Organizer: 大気球シンポジウム
  • Place of Presentation: JAXA/宇宙科学研究本部
  • Year and Date: 2009-10-01
• [Presentation] BESS-Polar II実験反陽子流束解析報告(3) (2009)
  • Author(s): 坂井賢一, 他
  • Organizer: 日本物理学会2009秋季大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-09-13
• [Presentation] BESS実験による宇宙線反粒子観測とダークマター (2009)
  • Author(s): 吉村浩司
  • Organizer: 日本物理学会2009秋季大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-09-11
• [Presentation] Progress in BESS-Polar II experiment and the data analysis (2009)
  • Author(s): K.Sakai, et al.
  • Organizer: 27^<th> International Symposium on Space Technology and Science
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 2009-07-09
• [Presentation] BESS Polar-II実験反陽子流束解析報告(2) (2009)
  • Author(s): 坂井賢一, 他
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-28
• [Presentation] BESS実験による宇宙線反粒子観測とダークマター (2009)
  • Author(s): 吉村浩司
  • Organizer: 日本物理学会
  • Place of Presentation: 甲南大学
• [Presentation] The second Antarctic flight of BESS-Polar experiment : Flight summary and Detector performance. (2009)
  • Author(s): K.Yoshimura, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] Precise measurement of the cosmic-ray proton spectrum and the time variation with BESS-Polar I (2009)
  • Author(s): R.Orito, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] BESS-Polar II : Fiber readout Time of Flight system (2009)
  • Author(s): A.Horikoshi, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] The Time of Flight System for BESS-Polar II (2009)
  • Author(s): N.Thakur, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] Antiproton identification with BESS Polar-II Aerogel Cherenkov Counter (2009)
  • Author(s): K.Sakai, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] Short-term and diurnal proton flux variation during the BESS-Polar I balloon flight (2009)
  • Author(s): T.Hams, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] Measurements of Cosmic-Ray Hydrogen and Helium Isotopes with BESS-Polar I in 2004 (2009)
  • Author(s): K.C.Kim, et al.
  • Organizer: 31^<st> International Cosmic Ray Conference
  • Place of Presentation: Lodz, Poland
• [Presentation] Cosmic-ray antiparticles as a probe of early universe (2008)
  • Author(s): K. Yoshimura
  • Organizer: The 18th Workshop on General Relativity and Gravitation in Japan (JGRG18)
  • Place of Presentation: Hiroshima University
  • Year and Date: 2008-11-19
• [Presentation] BESS Polar-II実験反陽子流束解析報告(1) (2008)
  • Author(s): 坂井賢一, 他
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 山形大学
  • Year and Date: 2008-09-22
• [Presentation] GEANT4によるBESS-Polar II測定器のシミュレーション(1) (2008)
  • Author(s): 楠本彬, 他
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 山形大学
  • Year and Date: 2008-09-20
• [Presentation] Flight performance of BESS Polar II Aerogel Cherenkov Counter (2008)
  • Author(s): K. Sakai, et al.
  • Organizer: 37^<th> COSPAR Scientific Assembly
  • Place of Presentation: Montreal, CANADA
  • Year and Date: 2008-07-18
• [Presentation] Performance of the BESS-Polar II Time-of-Flight Counter (2008)
  • Author(s): T. Hams, et al.
  • Organizer: 37^<th> COSPAR Scientific Assembly
  • Place of Presentation: Montreal, CANADA
  • Year and Date: 2008-07-18
• [Presentation] Development of a Thin Scintillator-Array Time-of-Flight Hodoscope with Fiber Bundle Readout onboard BESS-Polar II (2008)
  • Author(s): A. Horikoshi
  • Organizer: 37^<th> COSPAR Scientific Assembly
  • Place of Presentation: Montreal, CANADA
  • Year and Date: 2008-07-18
• [Presentation] The BESS investigation of the origin of cosmic-ray antiprotons and search for cosmological antimatter (2008)
  • Author(s): J. Mitchell, et al.
  • Organizer: 37^<th> COSPAR Scientific Assembly
  • Place of Presentation: Montreal, CANADA
  • Year and Date: 2008-07-18
• [Presentation] Solar-cell power system for the BESS Polar Experiment (2008)
  • Author(s): M. Hasegawa, et al.
  • Organizer: 37^<th> COSPAR Scientific Assembly
  • Place of Presentation: Montreal, CANADA
  • Year and Date: 2008-07-18
• [Presentation] The BESS-Polar II Long Duration Flight above Antarctica (2008)
  • Author(s): M. Sasaki, et al.
  • Organizer: 37^<th> COSPAR Scientific Assembly
  • Place of Presentation: Montreal, CANADA
  • Year and Date: 2008-07-17
• [Presentation] BESS-PolarII実験(1)フライト実験報告 (2008)
  • Author(s): 長谷川 雅也
  • Organizer: 日本物理学会
  • Place of Presentation: 近畿大学
  • Year and Date: 2008-03-23
• [Presentation] BESS experiment:Progress and Future Prospects (2008)
  • Author(s): K.Yoshimura
  • Organizer: Advances in Cosmic Ray Science
  • Place of Presentation: 早稲田大学
  • Year and Date: 2008-03-17
• [Presentation] BESS-PolarII実験概要と準備状況 (2007)
  • Author(s): 長谷川 雅也
  • Organizer: 日本物理学会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-22
• [Remarks] ホームページ等
  • URL: http://bess.kek.jp/
• [Remarks]
  • URL: http://bess.kek.jp
• [Remarks]
  • URL: http://bess.kek.jp/