Speaker
Ranjan Dharmapalan
(Argonne National Laboratory)
Description
A number of current and upcoming neutrino and dark matter search
experiments employ noble liquid or gases as the detector medium.
Operating at cryogenic temperatures, these experiments rely on
scintillation light from particle interactions in the medium to infer
time and/or position of interaction, crucial for reconstruction and
background rejection.
The Argonne Microchannel Plate (MCP) Photodetector Group has
successfully built and tested 6cm × 6cm active area MCP photodetectors
that feature bialkali photocathodes with improved quantum efficiency,
pico-second time resolution, and sub-millimeter spatial resolution.
Currently, the group is developing components for the MCP
photodetector suitable for scintillation detection in cryogenic liquid
detectors such as liquid argon TPCs (128nm scintillation) and xenon
dark matter detectors (175nm scintillation). We are also exploring
ways to mitigate wave length shifting requirements and developing
bare-MCP photodetectors to operate in a gaseous cryogenic
environment.Status and results from this development work will be
discussed.
Author
Ranjan Dharmapalan
(Argonne National Laboratory)
