| | Setup: DIB 1/3/4 → 3.2 MHz filters 1/2/3 → cable 1/3/2 → gender changers → rerouting boards 1/3/4 → DCRC55(1)/33(2)/50(3) |
| | Overnight baked for 5 hours. Base temp is elevated from before the bake at 92.8 mK. |
| 1000 | Realize that using the DCRCcontrol flashandflash tool caused 2 things to happen. First, because I only set it to flash on DCRCs 2,3, it left DCRC1's charge bias on. Second, it saves and restores whatever charge bias state it was in before the flash (i.e. DCRCs 2,3 bias settings). So, because I didn't ground the detector manually, it flashed with DCRC1 biased and since then has had all DCRCs biased. |
| 1003 | Turn off DCRC biases. Tower temp falls to normal level of ~84 mK. Why did this raise the temp though? |
| 1007 | Tower/MC/Coldplate = 84.0/57.8/361 mK, Still = 1.24 K / 0.20 mbar, G1/G2 = 260/252 mbar, 1K Pot = 1.63 K / 28 mbar. MB = 22.8% |
| 1011 | Fill LN2 cold trap |
| 1014 | Realize there was an error in the charge_bias_scan_R65 sequence I had been using so it never changed DCRCQI bias from 0 V! Not sure how exactly this would have screwed things up. Maybe it was the source of the noise and thus noise triggering I saw at bias >0 V? |
| 1018 | Flash detector for 60s |
| 1038 | Tower = 84.8 mK |
| 1040 | Let's get some high bias data while in lab. Go back to the trigger levels I tuned in on saturday morning before I mucked around with that bias scan sequence. |
| 1041 | Start series of data with Vbias(external) = 70.0 V, with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1046 | Triggering looks good so far. It's a little strange though, looking at raw traces it seems like it's taking a dozen triggers from each dcrc in turn. DCRC1 will trigger on some pulses, then DCRC2, then DCRC3. Maybe this is how triggerfe handles things? It polls a DCRC for triggers, fetches them, then polls the next DCRC? This could also explain the noise triggering behavior I saw this weekend. If one channel is triggering on noise, then those noise triggers will all come in a burst when its that DCRCs turn. |
| 1123 | Triggering still looks good and dump sizes are constant. |
| 1143 | File sizes begin to fall in the 58th dump. |
| 1144 | Stop the run Ground and flash detector for 60 s. |
| 1200 | The above 70V series has clear 60keV lines in it. They were just an order of magnitude lower than I'd been looking before. That series was triggering well and lower than we'd been triggering before. |
| 1215 | Tower = 84.4 mK |
| 1217 | Start series of data with Vbias(external) = 30.0 V, with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1330 | Triggering looks good. |
| 1237 | Stop run , ground detector |
| 1238 | Start LHe transfer (18.7%) |
| 1244 | Flash detector for 60s |
| 1320 | Cease LHe transfer (87.3%) |
| 1325 | Start series of data with Vbias(external) = 50.0 V, with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1430 | Bleh, triggering on noise again for this whole series. |
| 1433 | Stop run, ground detector, flash for 60s. |
| 1452 | Tower temp = 84.6 mK |
| 1453 | Start series of data with Vbias(external) = 50.0 V, with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1459 | That low frequency noise in DCRC2 is back, but we seem to be triggering just on pulses again. |
| 1543 | Dump sizes start falling around minute 37 |
| 1541 | Stop run, ground and flash detector for 60 s |
| 1618 | Start series of data with Vbias(external) = 90.0 V, with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). |
| 1718 | She's still going strong. |
| 1738 | Dump sizes start to fall in 75th minute. |
| 1740 | Stop the run, ground detector. |
| 1741 | Begin 1 hour mini-bake. |
| 1742 | Fill LN2 cold trap full. |
| 1952 | Tower = 84.2 mK |
| 1953 | Start charge_bias_scan_R65 sequence with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). This will scan through DCRC biases of 0, 3, 6, 9, 12, -3, -6, -9, -12 V |
| 2058 | 0V (_1953) triggering looks good, but 3V (_2045) data is triggering on noise… |
| 2059 | Stop the sequence |
| 2101 | Manually start test series at 0V. Triggering looks fine. |
| 2106 | Manually start test series at 3V DCRC bias. Triggering on noise. Disable DCRC1 triggers at beginning of minute 4. Still have noise triggers. Re-enable DCRC1 triggers and disable DCRC3 triggers at beginning of minute 11. Now there are no noise triggers. Re-enable DCRC3 triggers with thresholds raised to 60/60 ADC at beginning of minute 19. Triggering on noise again. Raise DCRC3 thresholds to 100/100 ADC part way through 28th minute. Still triggering on noise. Disable DCRC3QO trigger midway through 33rd minute. Triggers on noise. Enable DCRC3QO, disable DCRC3QI triggers at beginning of minute 38. Triggers on noise. Disable all DCRC3 triggers again at minute 44. No there is no noise triggering. |
| | Summary of above tests: 0V = good triggering, DCRC bias of 3V = bad, turn off DCRC3 triggers=good, turn on either DCRC3 trigger=bad, double DCRC3 thresholds=still bad. This wasn't really a problem during the day with the external bias. Maybe DCRC3's bias line is noisy enough to screw up its triggering. |
| 2200 | Ground and flash detector for 60 s. |
| 2225 | Tower = 85.1 mK |
| 2224 | Modify charge_bias_scan_R65 sequence by removing initial 0V series. |
| 2226 | Start charge_bias_scan_R65 sequence with 1000 beginning randoms, and a 40/30/15/-/- ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). This will scan through DCRC biases of 3, 6, 9, 12, -3, -6, -9, -12 V |
| 2231 | stop the sequence, immediately have rapid triggering on noise. This is dumb. |
| | On Saturday I was able to run at DCRC biases of 5 V, 10 V by manually starting a run. It wasn't till I tried the sequence that things tarted getting screwy. Maybe I'll try that again now. |
| 2232 | Manually start a run with 0V DCRC bias, and triggers enabled at thresholds of DCRC1qI/qO/DCRC2qO/DCRC3qI/qO = 40/30/15/40/40 ADC. Well, this was going to be a control series, but now even this 0V series is triggering on noise… |
| 2238 | Manually start a run with 10V DCRC bias, and triggers enabled at thresholds of DCRC1qI/qO/DCRC2qO/DCRC3qI/qO = 40/30/15/40/40 ADC. This also has rapid triggers on noise. |
| 2240 | Stop run, ground detector, restart DCRC programs. |
| 2243 | Manually start a run with 10V DCRC bias, and triggers enabled at thresholds of DCRC1qI/qO/DCRC2qO/DCRC3qI/qO = 40/30/15/40/40 ADC. Now its triggering fine! |
| | Somehow using the sequence puts (one of?) these guys into a noise-triggering state that requires restarting the programs to fix? Purge the sequence of any commands I'm not doing manually here (e.g. remove lines about setting up flash constants etc. Assume the user will have everything set up before the sequence is started) |
| 2250 | Stop run, ground and flash detector. Let's try this one last time tonight. |
| 2320 | Start barebones charge_bias_scan_R65 sequence with 1000 beginning randoms, and a 40/30/15/40/40 ADC bin threshold trigger on DCRC1qI/qO/DCRC2qO/DCRC3qI/qO, with trigger baseline = 32 samples and trigger length = 10 samples (these are 2x the usual values). This will scan through DCRC biases of 3, 6, 9, 12, -3, -6, -9, -12 V |
| 2343 | Well now its not copying dumps to midasraw for some reason… Stop the sequence |
| 2348 | Even another manually started run does not get copied to midasraw. |
| 0005 | Ground detector and start 5 hour bake. |