Orateur
Dr
Matthias Hoek
(University of Glasgow)
Description
Imaging Cherenkov detectors play an important role in modern particle and nuclear physics experiments.
DIRC-type Cherenkov counters offer the advantage of a very compact detector design by employing solid
radiator materials. The optical quality of such materials is paramount and has to withstand the radiation
environment of modern high luminosity experiments without significant degradation.
The upcoming PANDA experiment at FAIR will rely on DIRC counters for precision particle identification
over a wide momentum range. Synthetic fused silica is the radiator material of choice for these detectors.
Investigations of the radiation hardness of different types of fused silica showed significant differences
especially in the blue-UV region.
Radiation hardness studies on different types of Heraeus Suprasil fused silica led to the discovery of
defect mechanisms that are well known for UV laser irradiation also being present for ionising radiation.
Evidence for these defect mechanisms and the relevant parameters that govern them will be presented.
Using these results the composition of synthetic fused silica can be adjusted to improve its radiation hardness
according to experimental requirements.
| Please indicate "poster" or "plenary" session. Final decision will be made by session coordinators. | plenary |
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Auteur principal
Dr
Matthias Hoek
(University of Glasgow)
