| 1353 | Repower DCRCs and reestablish timing link now that Co source is in place. |
| 1355 | Check event rate with 50 ms randoms, counting pulses. With 57Co source 2 m from detector, rate is around 140 Hz, close to background. With source 1 m from fridge, rate is around 260 Hz. Leave source 1 m from detector. |
| 1427 | Cease data run. Ground detector. Flash with IR LEDs for 30s, and cooldown for 10 minutes. |
| 1446 | With 33kΩ resistor on DIB1 QOFB line, manually start series of 30 minutes data with -20V HV/ 10V DIB1 with 1000 starting/1000 ending randoms with 250 ADC Bin trigger threshold on DIB1 Qo. |
| 1501 | Stopping this run early. Looking at traces on BatViewer reveals significant pileup in the traces. Almost all events have multiple pulses. |
| 1504 | Pull Co source back to ~1.5m from detector. |
| 1507 | Looking at pulse viewer, some baseline noise has returned. Raise QO trigger to 300ADC to get a decent rate of good pulses. |
| 1509 | Ground detector. Flash with IR LEDs for 30s, and cooldown for 10 minutes. |
| 1524 | With 33kΩ resistor on DIB1 QOFB line, manually start series of 30 minutes data with -20V HV/ 10V DIB1 with 1000 starting/1000 ending randoms with 300ADC Bin trigger threshold on DIB1 Qo. |
| 1541 | Event rate still looks high in BatViewer. Without stopping run, pull source back to ~2m from the detector. |
| 1557 | Cease data taking. Baseline Vpp=0.3V. Releasing bath pressure improves things: Vpp=0.1. After ~2mins of dewar bung removed, strong ~150Hz Taconis noise is observed. |
| 1603 | Replacing bung brings back Taconis. LHe level=38.4% |
| 1605 | Releasing pressure further |
| 1607 | Close bathand wait for noise to return. |
| 1609 | Baseline noise returns with Vpp = 0.22V |
| 1613 | In preparation for transfer, took a new LHe dewar off the line. This seems to have no effect on the noise. |
| 1615 | Remove both bungs at top of bath. Baseline noise remains with Vpp=0.2V with high frequency (~15kHz) noise sporadically present. |
| 1630 | Commence LHe transfer (35.7%). |
| 1657 | Commence 5 minute IR bake. |
| 1713 | Cease LHe transfer (91.2%). |
| 1734 | After the transfer Vpp was down to 0.08 without letting out pressure. With 33kΩ resistor on DIB1 QOFB line, manually start series of 10 minutes data with 20V HV/ -10V DIB1 with 1000 starting/1000 ending randoms with 225ADC Bin trigger threshold on DIB1 Qo. |
| 1745 | Trigger was too low and pileup might have been too high. Ground detector. Flash with IR LEDs for 30s, and cooldown for 10 minutes. |
| 1758 | After the transfer Vpp was down to 0.08 without letting out pressure. With 33kΩ resistor on DIB1 QOFB line, manually start series of 10 minutes data with -20V HV/ 10V DIB1 with 1000 starting/1000 ending randoms with 250ADC Bin trigger threshold on DIB1 Qo. |
| 1805 | Cease data. See that .13 Vpp noise has returned. Release pressure from main bath. While main bath port open noise appears reduced. |
| 1815 | Pulses look good on pulse viewer. Without flashing first, with bath port open and With 33kΩ resistor on DIB1 QOFB line, manually start series of 10 minutes data with -20V HV/ 10V DIB1 with 1000 starting/1000 ending randoms with 250 ADC Bin trigger threshold on DIB1 Qo. |
| 1824 | While still taking data, set Qo trigger threshold to 300 ADC Bin. Close port to main bath. |
| 1849 | Cease data run. Ground detector. Switch to UV LEDs and flash with UV LEDs for 30s, and cooldown for 10 minutes. |
| 1900 | Pulses look good on pulse viewer, no noise seen. With 33kΩ resistor on DIB1 QOFB line, manually start series of 30 minutes data with -40V HV/ 10V DIB1 with 1000 starting/1000 ending randoms with 275 ADC Bin trigger threshold on DIB1 Qo. Source is about 2 feet from cryostat, but with “door” closed by lead brick. |
| 1928 | Cease data run. Ground detector. Flash with UV LEDs for 30s, and cooldown for 10 minutes. |
| 1938 | With 33kΩ resistor on DIB1 QOFB line, manually start series of 20 minutes data with -40V HV/ 10V DIB1 with 1000 starting/1000 ending randoms with 200 ADC Bin trigger threshold on DIB1 Qo. Source is about 3 feet from cryostat, and with “door” open. After 10 minutes data looks bad, so we moved up to 275 ADC trigger. |
| 2003 | Cease data and start a 12 hour UV bake. |
| 2005 | Put Co-57 source in its lead container and put that in safe. Turn off Geiger counter. |
| 2018 | Fill LN2 cold trap full. |
| 2019 | Abort bake to perform quick electrical check before leaving. |
| 2035 | Both DIBs look as they did at previous electrical checks. |
| 2038 | Restart 12 hour UV bake. |
