タムラ タダヒサ   Tamura Tadahisa
  田村 忠久
   所属   神奈川大学  工学部 物理学教室
    神奈川大学大学院  工学研究科 工学専攻(応用物理学領域)
   職種   教授
言語種別 日本語
発行・発表の年月 2009/04
形態種別 学術雑誌
査読 査読あり
標題 Electron Spectrum in 10-1000 GeV from BETS & PPB-BETS and Future Balloon Observation
執筆形態 共著
掲載誌名 Journal of the Physical Society of Japan
巻・号・頁 78(Suppl. A),57-62頁
著者・共著者 T. Tamura, S. Torii, K. Yoshida, H. Kitamura, T. Yamagami, J. Chang, I. Iijima, A.
Kadokura, K. Kasahara, Y. Katayose, T. Kobayashi, Y. Komori, Y. Matsuzaka, K. Mizutani,
H. Murakami, M. Namiki, J. Nishimura, S. Ohta, Y. Saito, M. Shibata, N. Tateyama, H.
Yamagishi, and T. Yuda
概要 三陸や南極での大気球を利用したこれまでの宇宙線電子観測実験(三陸での気球実験BETSおよび南極周回気球実験PPB-BETS)と、その結果得られた10~1000 ギガ電子ボルトのエネルギー領域のスペクトルについてをまとめ、さらに将来の南半球での大陸間横断気球を用いた長期間観測についての展望を紹介した。
We carried out electron observations with balloons to investigate acceleration and propagation of electrons in the universe. We developed BETS (Balloon-borne Electron Telescope with Scintillation fibers) for electron observations in Sanriku. We obtained electron energy spectrum from 10 to 100 GeV with it. At higher energies, the energy spectrum of electron might show some structure caused by nearby sources like the Vela supernova remnant. In order to observe the energy spectrum above 100 GeV, we needed a thicker calorimeter and a longer observation time. We developed PPB-BETS (Polar Patrol Balloon-BETS) by improving BETS to carry out a long duration ballooning in Antarctica. Energy spectrum of electrons from 100 to 1000 GeV was obtained by a successful fight for 13 days. The arrival direction of electrons seems to be consistent with isotropic distribution for the data taken with PPB-BETS, although we need better statistics to make it clear. We have a future plan to make an observation of electrons and gamma-rays with a scale model of CALET (CALorimetric Electron Telescope) by long duration ballooning in the southern hemisphere for 2 weeks. We proposed CALET for the cosmic-ray observations on the International Space Station (ISS), and it has been selected as one of mission candidates for the second utilization plan on the Exposure Facility of the Japanese Experiment Module (JEM-EF). We are developing a scale model of 1/16 of CALET.
三陸や南極での大気球を利用したこれまでの宇宙線電子観測実験と、その結果得られた10~1000 ギガ電子ボルトのエネルギー領域のスペクトルについてをまとめ、さらに将来の南半球での大陸間横断気球を用いた長期間観測についての展望を紹介した。