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 2007/07
形態種別 学術雑誌
標題 Energy spectrum and arrival directions of high-energy electrons over 100GeV observed with PPB-BETS
執筆形態 共著
掲載誌名 Proceedings of the 30th International Cosmic Ray Conference, Merida, Yucatan, Mexico
巻・号・頁 2,59-62頁
著者・共著者 K.Yoshida, et al.
概要 南極周回気球を利用したPPB-BETSによる高エネルギー宇宙線電子観測の結果について、100GeV以上でのエネルギースペクトルと電子到来方向についての解析結果を報告した。
We have observed cosmic-ray electrons from 10 GeV to 1 TeV with PPB-BETS by a long
duration balloon flight using Polar Patrol Balloon (PPB) in Antarctica. The observation was carried out
for 13 days at an altitude of 35 km in January 2004. The detector is an imaging calorimeter composed
of scintillating-fiber belts and plastic scintillators inserted between lead plates. The geometrical factor
of detector is about 600 cm2sr and the total thickness of lead absorber is 9 radiation lengths. We have
collected 5.7×103 events over 100 GeV including nearly 100 candidates of primary electrons. During
the flight, sun aspect sensors and geomagnetic aspect sensors operated to determine the attitude of the
instrument. The arrival directions of high-energy electrons over 100 GeV, together with the energy spectrum,
are suggested to be a powerful probe to identify nearby cosmic- ray electron sources. In this paper,
we present the energy spectrum and arrival directions of cosmic-ray electrons from 100 GeV to 1 TeV
observed with PPB-BETS.