2019/03/31 (Sunday)
| Setup | DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer 3/?/2 → HVConn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC50(3) DCRC33(2) → 1kV power supply → HV input Lead poly shield is erected, N/E/W walls complete, no poly or lead on S wall. |
|---|---|
| 1122 | Tower/MC/Coldplate = 39.8/30.0/(167←unlikely) mK, Still = (1.35±0.15 K ← unlikely) / 0.150 mbar, G1/G2 = 288/255 mbar, 1K Pot = 1.78 K / 13 mbar. MB = 68.7% |
| 1125 | Fill LN2 cold trap bath. |
| 0819 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 0925 | MIDAS mhttpd crashed again, but not until the wait period after the flash, so data should be OK. Restart mhttpd using ./start command. |
| 1004 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 1145 | MIDAS mhttpd crashed again, this time apparently after the sequence completed. Restart mhttpd using ./start command. |
| 1150 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 1221 | It seems that mhttpd is missing its checkins with a watchdog process. There is a setting in the ODB that seems like it might set the required time interval: /Programs/mhttpd/Watchdog timeout 10000 (0x2710) I'm guessing this is in ms. Let's try doubling it to 20s by setting: /Programs/mhttpd/Watchdog timeout 20000 MIDAS mhttpd crashed again (mentioned below) after the above change, so I guess this did not help. -MF |
| 1300 | MIDAS mhttpd crashed again, this time toward the end of the after-flash wait period. Restart mhttpd using ./start command. |
| 1307 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 1456 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 1621 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| We're on a roll, 3 sequences with no MIDAS crashes. Maybe adjusting the watchdog timeout did help. | |
| 1743 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 1856 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |
| 2010 | Start a background series at HV = 300→400V @ 3.9 V/min (26 min duration) with 1 minute 15% prebias CDMS detector: Driver Gains = 1x, DCRC4/3 QET biases = (430/410/500)/(500/460/420) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR randoms, trigger on DCRC4pA/B/C threshold = 7/6/6 use sequence looptest_HVdrift_fast_300V_3p9VPM_prebias_15_1_dur_26min.msl |