Speaker
Adriaan Heering
(University of Notre Dame (US))
Description
The design of the CMS phase II upgrade for the SHLC uses SiPMs for the Barrel Timing Layer (BTL) and the Behind HCAL detector (BH). In both sub-detectors the SiPMs will see a 1 MeV Equivalent dose of around 10E14 n/cm2. To lower the noise in the SiPMs the design is to run at a low temperature of -30C .
Different samples from two manufactures of SiPMs were radiated up to a very high total dose of 4*10E14 at the TRIGA reactor at the JSI in Slovenia.
We compare samples of 4 different wafers with different internal electric field from FBK-irst (Italy). We study the noise vs temperature down to -40C after different irradiations. We also report on PDE change and breakdown voltage shifts after the highest neutron doses.
Primary author
Adriaan Heering
(University of Notre Dame (US))
Co-authors
Dr
Yuri Musienko
Prof.
Mitchell Wayne
(University of Notre Dame)
