学術創成月例Mar/2010

竹下徹（信州大）

SiPM WS:~40人（学生、ロシア人）MPPC life test

SiPM WS

x2000 Ion feedback Zecotek?

radiation tolerance ?

replaceable module

at DESY, 22-23/Feb/2010

for CMS upgrade

CMS HCAL Barrel/ outerTT

HPD readout X > SiPM

>segmentation in longitudinal

exchange sensor part

PPD勢力図ロシア：SiPM (MEPHI/ITEP)>ILC-AHCAL

ロシア：MAPD (Zecotek/Dubna)> CMS?

日本：MPPC (HPK/DRD,信州神戸筑波京都)> Neutrino,ILC-scECAL

ドイツ：KETEK

イタリア：SPMM/CPTA(SensL/INFN)

PPD特徴ロシア：SiPM

ロシア：MAPD

日本：MPPC

ドイツ :KETEK

15,000 pixels per mm2

Gain per pixel ~60,000

ultraviolet sensitive?

blue sensitive

red/green sensitive

2cm

MAPDZecotek prod.3x3 mm2, 135kpix, PDE~27% <<<??no quench R with potentialMega-PixC dep. on Vbias

MPPC vs MAPDspectral responses

MPPC: bleu

MAPD: green

recovery

MPPC:fast

MAPD:very slow

MAPD

MPPC

MPPC

MAPD

comp.PDEKETEK:27%@420nm

MPPC:18%@450nm

SensL:8%@500nm

MPPC stabilitylong life time > did not break down

@ 85度

MPPC stability -2stable for 11 yearsfor all 8 samples

gain noises rate (Hz)

dV (V)Vbias (V)