PoS(PhotoDet2015)022
The development and performance evaluation of a
hybrid photo-detector for Hyper-Kamiokande
Miao JIANG
*
Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
E-mail: mjiang@scphys.kyoto-u.ac.jp
Yasuhiro NISHIMURA
a
, Yuji OKAJIMA
b
, Masahiro KUZE
b
, Yusuke SUDA
c
, Ryosuke
AKUTSU
c
, Daisuke FUKUDA
d
, Seiko HIROTA, Masashi YOKOYAMA
c
, Masayuki
NAKAHATA
a
, Masato SHIOZAWA
a
, Yoshinari HAYATO
a
, Shoei NAKAYAMA
a
,
Hidekazu TANAKA
a
, Tsuyoshi NAKAYA, Akihiro MINAMINO, Akimichi TAKETA
e
,
Yoshihiko KAWAI
f
, Takayuki OHMURA
f
, Masatoshi SUZUKI
f
a
Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
b
Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
c
Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
d
Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan
e
Earthquake Research Institute, University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan
f
Hamamatsu Photonics K.K., Hamamatsu, Shizuoka, 430-8587, Japan
We have been developing a new hybrid photo-detector (HPD) for Hyper-Kamiokande, which is
a proposed next generation megaton-class water Cherenkov detector. The prototypes of the 50
cm HPD with φ 5 mm avalanche diode (AD) [1] and the 50 cm HPD with φ 20 mm AD (R12850,
Hamamatsu Photonics K.K.) were designed and produced after successful fabrication of 20 cm
HPD. For the 50 cm HPD with φ 5 mm AD, the transit time spread, linearity and temperature
dependence of gain have been evaluated. For our target design of the 50 cm HPD with φ 20 mm
AD, two solutions by the segmented AD and the transformer coupling were tried to suppress the
capacity seen by preamplifier since it is difficult to design a high speed preamplifier with low
noise level for a large area AD due to the large junction capacitance. They successfully reduced
the noise, and the performance of HPD showed significant improvements.
International Conference on New Photo-detectors - PhotoDet 2015
6-9 July 2015
Moscow, Troitsk, Russia
*
Speaker.
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