Speaker
Description
Novel Cherenkov detector upgrades favour GEM and THick-GEM (THGEM)
based MPGD systems. These detectors have reduced ion backflow,
fast signal formation, high gain, and could suppress the MIP signals as well.
Sources of concern are the possible inefficiencies of the photo-electron
collection from the top of the THGEM and the local variation of the gain related to geometrical non-uniformity.
The developed high resolution scanner[1] using a focused
UV light gave the possibility to study single photo-electron
response of MPGDs in the submillimeter scale. Revealing the microstructure of
photo-efficiency and local gain provides a new tool to quantitatively compare
different THGEM geometries and field-configurations, and thus optimize the
detector parameters. The presentation describes the key elements of the scanning
system and focus, in particular, on the microstructure evolution of different
Thick-GEM configurations providing optimization recipes.
Talk on behalf of a Budapest-Trieste Collaboration
| Registered | Yes |
|---|
Primary author
External references
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