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	The balloon-bone CALET prototype detector (bCALET)
執筆形態	共著
掲載誌名	32nd INTERNATIONAL COSMIC RAY CONFERENCE, BEIJING 2011
巻・号・頁	6,67-70頁
著者・共著者	SHUNSUKE OZAWA, SHOJI TORII, KATSUAKI KASAHARA, HIROYUKI MURAKAMI, YOSUI AKAIKE, YOSHITAKA UEYAMA, DAIJIRO ITO, MOTOHIKO KARUBE, KEINOSUKE KONDO, TAE NIITA, TADAHISA TAMURA, YUSAKU KATAYOSE, KENJI YOSHIDA, YOSHITAKA SAITO, HIDEYUKI FUKE, JIRO KAWADA
概要	The CALET payload will be installed in the Japanese Experiment Module Exposed Facility (JEM-EF) of the International Space Station (ISS). We developed a balloon-borne payload to evaluate the performance of CALET by carrying out precursor flights for the electron and gamma-ray observations. The first flight of bCALET-1 (balloon-borne CALET prototype) was carried out in 2006, and the enhanced version, bCALET-2, was successfully flown in August 2009. The bCALET-2 is composed of IMaging Calorimeter (IMC) and Total AbSorption Calorimeter (TASC). The IMC has an area of 256 mm × 256 mm, and is consisted of 8 layers of scintillating fiber belts with a total 3.6 radiation lengths of tungsten plates interleaved within the fiber planes for imaging the pre-shower development. TASC is consisted of crossed BGO logs (25 mm × 25 mm × 300 mm in each) with a total of 13.4 radiation lengths depth, for measuring the total energy deposit of incoming shower particles. The geometry factor is nearly 320 cm2sr over 10 GeV. We succeeded the observation of the electron energy spectrum in 1 GeV several 10 GeV electron and the atmospheric gamma-rays in 1 GeV a few 10 GeV, which are consistent with previous observations by BETS. The results are compared with simulations for confirming the detector performance.