Radiation Hardness Studies (summary) Table ----- CAP2 Date Dose [MRad] I_leak[*1000 pA/cm2] Noise[e-] Comment ------------------------------------------------------------------------------------- 01 2004 11 19 2 Irradiated 01 2004 11 24 2 Annealing 65 deg C 02 2004 11 19 1.5 Irradiated 02 2004 11 24 1.5 Annealing 65 deg C SP 2004 12 08 2.4 Room temp. CAP1 Date Dose [MRad] I_leak[*1000 pA/cm2] Noise[e-] Comment ------------------------------------------------------------------------------------- 08 2004 06 30 0 0.001624 14.81 New 08 2004 07 15 3 1800 No annealing 08 2004 08 16 3 295 "Solar" annealing 08 2004 09 07 3 236 60 deg C 08 2004 09 14 3 171 60 deg C 08 2004 09 29 3 150 80 deg C 08 2004 10 29 3 139 Room temp. 08 2005 03 04 3 ?? Room temp. 09 2004 06 30 0 0.001638 14.8 New 09 2004 08 16 20 6300 No annealing 09 2004 09 07 20 2100 60 deg C 09 2004 09 14 20 1200 60 deg C 09 2004 09 29 20 745 80 deg C 09 2004 10 29 20 636 Room temp. 09 2005 03 04 20 ?? Room temp. 11 2004 06 30 0 0.001986 15 I've checked the new 3Mrad leakage current and from the data you've taken, I've estimated the new leakage current to be a factor ~6 down (3Mrad after 15 days annealing, 295000 pA.cm-2 vs 1.8 M pA.cm-2 before). As for the 20 Mrad one, it seems to operate fine too, with an increase of leakage current from 3 Mrad to 20 Mrad of a factor ~4 (6.3 M pA.cm-2). Log --- 2004 06 30 All detectors were measured before irradiation (leakage current, S/N, signal/DAC counts calibration) 2004 07 13 (+1) CAP1_8 irradiated by 60CO at TIT to 3MRad @ 114kRad/h 2004 07 27 (+19) CAP1_8 annealed at 30-70 deg.C (in the car) 2004 08 10 CAP1_9 irradiated by 60Co at JAERI Takasaki to 20MRad 2004 08 31 CAP1_8 and CAP1_9 started annealing at 60 deg. C in the lab (from 18:00) 2004 09 22 CAP1_8 and CAP1_9 annealing temperature 60deg --> 80deg 2004 09 29 CAP1_8 and CAP1_9 --> high temperature annealing end, back to room temperature 2005 03 04 CAP1_8 and CAP1_9 re-measured after 5 months at room temp.