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	2011/08
形態種別	学術雑誌
標題	Measurements of Cosmic-ray Electron and Gamma-ray Flux with Balloon-Borne CALET Prototype
執筆形態	共著
掲載誌名	32nd INTERNATIONAL COSMIC RAY CONFERENCE, BEIJING 2011
巻・号・頁	6,17-20頁
著者・共著者	T.NIITA, S.TORII, K.KASAHARA, T.TAMURA, K.YOSHIDA, Y.KATAYOSE, H.MURAKAMI, S.OZAWA, Y.SHIMIZU, Y.AKAIKE, Y.UEYAMA, D.ITO, M.KARUBE, K.KONDO, M.KYUTAN
概要	We carried out the balloon experiments using CALET (CALorimetric Electron Telescope) prototype detectors in May 2006 (bCALET-1) and August 2009 (bCALET-2) for verification of both the detector performance and the capability of measuring the cosmic rays at higher atmosphere. The bCALET-2 instrument for observing the electrons and the gamma rays at energies in 1-100 GeV is composed of an imaging calorimeter consisting of 4096 scintillating fibers with a total of 3.6 radiation lengths of tungsten plates, and a total absorption calorimeter consisting of crossed 60 BGO logs with a total of 13.4 radiation lengths depth. The bCALET-2 was launched from the Taiki Aerospace Research Field, Japan Aerospace Exploration Agency, in Hokkaido, and flew successfully for 2.5 hours at a level altitude of 35 km. In this paper, we will present the spectra of electrons and gamma rays in the energy range of 1-100 GeV measured by bCALET-2, comparing with our previous observations, bCALET-1 and BETS. The detector performance is studied by comparing with the simulations, and the observed fluxes are found to be compatible with the expected.