Speaker
Michael Keller
(Heidelberg University)
Description
We have operated a 2D array of $88 \times 88$ Single Avalanche Photo Diodes fabricated in a CMOS technology in liquid nitrogen to evaluate its dark count rate at low temperatures. We found a rate of <20 dark counts per second and per $mm^2$ equivalent active area and observed an additional background at the edge of the array, which we attribute to photons emitted in the peripheral circuitry. The low dark count rate in combination with good timing information and excellent spatial resolution may lead to novel applications of such chips, like for instance search experiments using liquid Argon or Xenon. As a next step, we have therefore developed a 2D array with high fill factor and with a very low power, data-driven readout architecture.
Authors
Peter Fischer
(Heidelberg University)
Michael Keller
(Heidelberg University)
