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Neutron Irradiation test of FBK SiPM mod 4380 & 5550. 24 – 25 October 2011 irradiation of 8 ‘4380’ and 1 ‘small’ SiPMs. Irradiation time: 11 hours (+ 16 hours annealing) Total fluence: ~6 *10 8 N eq /cm 2 These SiPM are very noisy (also before irradiation).
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24 – 25 October 2011irradiation of 8 ‘4380’ and 1 ‘small’ SiPMs
Irradiation time: 11 hours (+ 16 hours annealing) Total fluence: ~6 *108 Neq/cm2 These SiPM are very noisy (also before irradiation)
23 – 25 November 2011irradiation of 8/3 ‘5550’ (eachSiPMreadoutindividualy)and the same ‘small’ SiPMs
Irradiation time: 19 hours (+ 33 hours annealing) Total fluence: ~6 *108 Neq/cm2 SiPM 5550 are much less noisy than 4380 (but 1/3 of 5550 vs 1 full 4380!)
Comparisonbetween4380 (left) and 5550 (right - 3/3 merged) Fluence: 0 1.5*108 Neq/cm2 3.5*108 Neq/cm2 6.7*108 Neq/cm2