Development of an anti-Compton veto for HPGe detectors operated in liquid argon using Silicon Photo-Multipliers

Understand

A proof of concept detector is presented for scintillation light detection in liquid argon using Silicon Photo-Multipliers.

• The aim of the work is to build an anti-Compton veto for germanium detectors operated directly in liquid argon like in the GERDA experiment.
• Properties of the Multi-Pixel Photon Counter (MPPC) are studied at cryogenic temperatures.
• To increase the light collection efficiency of the MPPCs wavelength shifting fibers were used.