English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Silicon photomultipliers (SiPM) are solid state light detectors withsensitivity to single photons. Their use in high energy physics experiments,and in particular in ring imaging Cherenkov (RICH) detectors, is hindered bytheir poor tolerance to radiation. At room temperature the large increase indark count rate makes single photon detection practically impossible already at10$^{11}$ cm$^{-2}$ 1-MeV-equivalent neutron fluence. The neutron fluencesforeseen by many subdetectors to be operated at the high luminosity LHC rangeup to 10$^{14}$ cm$^{-2}$ 1-MeV-equivalent. In this paper we present theeffects of such high neutron fluences on Hamamatsu and SensL SiPMs of differentcell size. The advantage of annealing at high temperature (up to 175$^{\circ}$C) is discussed. We demonstrate that, after annealing, operation atthe single photon level with a SiPM irradiated up to 10$^{14}$ cm$^{-2}$1-MeV-equivalent neutron fluence is possible at cryogenic temperature (77 K)with a dark count rate below 1~kHz.

Single photon detection with SiPMs irradiated up to 10$^{14}$ cm$^{-2}$ 1-MeV-equivalent neutron fluence