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 Study of GSO scintillator for upgrade of LHCf detectors
執筆形態 共著
掲載誌名 32ND INTERNATIONAL COSMIC RAY CONFERENCE, BEIJING 2011
巻・号・頁 5,55-58頁
著者・共著者 K.KAWADE, O.ADRIANI, L.BONECHI, M.BONGI, G.CASTELLINI, R.D’ALESSANDRO, K.FUKATSU,
M.HAGUENAUER, Y.ITOW, K.KASAHARA, D.MACINA, T.MASE, K.MASUDA, H.MENJO, G.MITSUKA,
Y.MURAKI, K.NODA, P.PAPINI, A.L.PERROT, S.RICCIARINI, T.SAKO, Y.SHIMIZU, K.SUZUKI,
T.SUZUKI, K.TAKI, T.TAMURA, S.TORII, A.TRICOMI, W.C.TURNER AND K.YOSHIDA
概要 Gd2SiO5 (GSO) scintillator has very excellent radiation resistance with fast decay time and large amount of
light yield. The radiation hardness of GSO was examined by using Carbon ion beams at Heavy Ion Medical Accelerator
in Chiba (HIMAC). Through two nights of irradiation a GSO scintillator was received 7 × 105 Gy of total dose and no
decrease of light yield was observed. On the other hand an increase of light yield by 25% was observed. The increase
is marginally proportional to the total dose at the rate of 0.025%/Gy and it is saturated at 1 kGy. Recovery to the initial
light yield was also observed during the day between two nights. The time scale of recovery is about 15,000 seconds. In
case of the LHCf experiment, very forward region (pseudo-rapidity  > 8.4) experiment at the LHC, the irradiation rate
is expected to about 100Gy for 10nb−1 of data taking at ps = 14TeV proton-proton collisions. Expected increase of
less than a few % will not be a big problem for the LHCf experiment.