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SUMMARY:CMOS based SPAD Arrays for light detection in rare event search ex
 periments
DTSTART;VALUE=DATE-TIME:20210917T160000Z
DTEND;VALUE=DATE-TIME:20210917T161500Z
DTSTAMP;VALUE=DATE-TIME:20260510T052547Z
UID:indico-contribution-70@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Michael Keller (Heidelberg University)\nExperiments 
 searching for rare physics events using scintillation in liquid noble gase
 s are steadily increasing in size. They require detector systems capable o
 f measuring individual optical photons with excellent efficiency while cov
 ering large areas. In addition\, the radioactive background introduced by 
 such systems must be extremely low. We propose SPAD arrays based on CMOS t
 echnology as a possible solution for such an application case. This techno
 logy allows for manufacturing SPADs and the associated CMOS readout logic 
 side by side\, creating a fully functional photon detector system one a si
 ngle silicon die. No further discrete components in direct vicinity and on
 ly few digital signals are required to operate a chip so that large areas 
 can be covered in a straight forward way with very low material budget. We
  have developed a chip architecture which offers a very low power dissipat
 ion and a high fill factor. We have operated a prototype chip with differe
 nt SPAD geometries at low temperatures of $100/160 \\mathrm{K}$ and measur
 ed dark count rates of $0.01/0.1\\\,\\mathrm{Hz}$ per $\\mathrm{mm}^2$ of 
 active SPAD area\, respectively. Our data driven readout architecture has 
 an idle power consumption of only $1.75\\\,\\mathrm{m W}$ and a signal dep
 endent contribution of about $15\\\,\\mathrm{\\mu W}$ per 1000 hits per se
 cond. Based on these results we propose a full detector concept to cover l
 arge areas with high fill factor requiring only 7 electrical signals for o
 peration.\n\nhttps://indico.physics.ucsd.edu/event/1/contributions/70/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/70/
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