University of Bern, Switzerland 2010
Sébastien Claude Delaquis
Supervisor: Dr. Igor Kreslo
Systematic characterization of a Geiger-mode micro-pixel avalanche photo-diode for cryogenic operation and application
Time projection chambers
Photon detectors for UV, visible and IR photons (solid-state)
Detector design and construction technologies and materials
A micro-pixel avalanche photo-diode operated in Geiger-mode (G-MAPD) has
been systematically characterized at three different temperatures (298 K, 87 K, 77 K).
The gain, noise-rate and cross-talk were measured. It was found that the G-MAPD
is well suited as a single-photon counting device for cryogenic conditions.
In high energy physics Time Projection Chambers (TPCs) are nowadays used as
particle tracking detectors. For the search of Dark Matter and neutrino interactions,
low threshold TPC readout is an important issue. Having a G-MAPD working at low
temperatures opens new possibilities in this field.
In the framework of this thesis, a novel prototype TPC readout-system, the
hybrid-field-induced-emission-amplifier (HFIE), was partially explored for use in Argon
gas. To do so a HFIE, including a dewar, a small drift-chamber, a DAQ system
and the related software, was realized and operated at the Laboratory for High Energy
Physics (LHEP) in Bern.