Updates from Ferrara R Calabrese A Cotta Ramusino
Updates from Ferrara R. Calabrese, A. Cotta Ramusino, M. Fiorini, T. Giammaria, M. Guarise, E. Luppi, A. Minotti, L. Tomassetti Tommaso Giammaria DUNE photo-sensor meeting 15/09/2020 You Inst Logo
Content • Recall of last update • Non DUNE HPK Si. PMs • Conclusions 2 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Content • Recall of last update • Non DUNE HPK Si. PMs • Conclusions 3 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Recall of last updates Si. PM Model IV Room. T IV LN 2 T (1 st cycle) IV LN 2 T (20 th cycle) Gain curve Dark noise (1 st cycle) R 00020 6050 HS-LRQ (HPK) R 00021 6050 HS-LRQ (HPK) R 00029 6075 -HX-LRQ (HPK) R 00030 6075 -HX-LRQ (HPK) R 00031 6075 -HX-LRQ (HPK) R 00032 6075 -HX-LRQ (HPK) R 00033 6075 -HX-LRQ (HPK) R 00034 6075 -HX-LRQ (HPK) 11 FBK x x 12 FBK x x 13 FBK x 16 FBK 17 FBK 18 FBK x Dark noise (20 th cycle) FBK split arrived on 16/07/2020 4 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Recall of last updates FBK Cryo (non DUNE split) • 8 x 12 mm 2 • 1 thermal cycle • 3000 events NO BURSTS! But some saturating events 5 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Content • Recall of last update • Non DUNE HPK Si. PMs • Conclusions 6 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Non-DUNE HPK Si. PMs HPK 13360 -6050 CS vs HPK 14160 -6050 HS Area Ncells Pitch 7 15/09/2020 6 x 6 mm 2 14331 50 μm Area Ncells Pitch Tommaso Giammaria | DUNE photo-sensor meeting 6 x 6 mm 2 14400 50 μm You Inst Logo
HPK 14160 DCR measurement at 3 OV • Vbd = (31. 5 ± 0. 1) V • Rq = (84. 1 ± 0. 2) Ω • DCR = (117 ± 1) m. Hz/mm 2 Both saturating events and bursts are present (as in the DUNE split) 8 28/07/2020 You Inst Logo
HPK 13360 DCR measurement at 3 OV • Vbd = (41. 5 ± 0. 1) V • Rq = (44. 4 ± 0. 2) Ω • DCR = (36. 7 ± 0. 6) m. Hz/mm 2 No bursts but still some saturating events 9 28/07/2020 You Inst Logo
Content • Recall of last update • Non DUNE HPK Si. PMs • Conclusions 10 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Causes of bursts • Possible causes (Packaging, Bulk, Bonding) will be investigated in the following weeks • Discussed with HPK: our European contact will inform the Engineers in JP • FBK is also looking into it 11 15/09/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
Conclusion • HPK 14160 shows both bursts and saturating events • HPK 13360 shows no bursts • All Si. PM tested so far present high energy events • Currently investigating the cause of the bursts with HPK and FBK 12 28/07/2020 Tommaso Giammaria | DUNE photo-sensor meeting You Inst Logo
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