研究者情報 | 神奈川大学

タムラ　タダヒサ Tamura Tadahisa 田村　忠久所属神奈川大学工学部応用物理学科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.