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 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.