Integration of thermo-electric coolers into the CMS MTD SiPM arrays for operation under high neutron fluence
نویسندگان
چکیده
Abstract The barrel section of the novel MIP Timing Detector (MTD) will be constructed as part upgrade CMS experiment to provide a time resolution for single charged tracks in range 30–60 ps using LYSO:Ce crystal arrays read out with Silicon Photomultipliers (SiPMs). A major challenge operation such detector is extremely high radiation level, about 2 × 10 14 1 MeV(Si) Eqv. n/cm , that integrated over decade High Luminosity Large Hadron Collider (HL-LHC). exposed this level have shown strong increase dark count rate and damage effects also impact their gain photon detection efficiency. For reason during operations whole cooled down -35°C. In paper we illustrate an innovative cost-effective solution mitigate on timing performance detector, by integrating small thermo-electric coolers (TECs) back SiPM package. This additional feature, fully array, enables further decrease operating temperature -45°C. leads reduction factor two without requiring power budget, since required TEC almost entirely offset due leakage current. addition, TECs reversed polarity technical stops accelerator can raise SiPMs up 60°C (about 50°C higher than rest detector), thus accelerating annealing partly recovering performance.
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ژورنال
عنوان ژورنال: Journal of Instrumentation
سال: 2023
ISSN: ['1748-0221']
DOI: https://doi.org/10.1088/1748-0221/18/08/p08020