2016/09/26 (Monday)
| DCRC1 and DCRC3 powered on and connected through HV setup EBoxDIB 2/3 → 3.2 MHz filters → Cables → remapping board I/remapping board II → HVside2board “DIB1”/“DIB2” → DCRC55(1)/50(3). Remapping boards have all possible lines switched off. . | |
| Baking using UV LEDs for 10 hours last night, bake still in progress this morning. | |
| 0845 | Tower/MC/Coldplate = 395/121/??(3.2 kΩ) mK, Still = 1.06 K / 120 μbar, G1/G2 = 220/210 mbar, 1K Pot = 1.59 K / 6.5 mbar. MB = 76.1% Like the last few days the Coldplate thermometer seems to be reading wrong. The other SENSOR 1 thermometers are maybe ok: Still near normal, MC Sensor = 150 mK Boiloff rate: good. Yesterday pressure was released from MB at 5 and 41 minutes after 94.2% fill 1K Pot has been stable. |
| 0850 | Fill LN2 cold trap bath. |
| 0910 | Remove PuBe neutron source from lab and return to 4th floor storage |
| 1100 | Fridge is cool enough for data. Remove resistor, and ensure pulses are still present. Noticed that the charge trace length had not been set to the proper value, so presumably our data from yesterday was affected. |
| 1101 | With no resistor on DIB1 QOFB line, manually start series of 30 minutes data with 12V HV/ -12V DIB1 with 1000 starting/1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1131 | Cease data run. Ground detector. Flash with UV for 30s, and cooldown for 10 minutes. |
| 1145 | With no resistor on DIB1 QOFB line, manually start series of 30 minutes data with 12V HV/ -12V DIB1 with 1000 starting/1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1216 | Cease data run. Ground detector. Flash with UV for 30s, and cooldown for 10 minutes. |
| 1223 | Stop programs, power down DCRC boards and remove DIB1 switch board. Solder on 33kΩ resistor. Return to previous setup. |
| 1232 | With switch board back in position, turn everything back on, and UV flash for 30 seconds followed by 10 minute cooldown. |
| 1246 | 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 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1320 | Cease data run. Ground detector. Flash with UV for 30s, and cooldown for 10 minutes. |
| 1332 | 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 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1426 | We noticed that we were triggering on noise too often in initial +20HV/-10DIB1 data series. Looking at pulses in Gui, we needed to increase trigger threshold to 5000 ADCbins in order to remove noise. Something is not right. Ground detector. Flash with IR for 20 minutes, and cooldown for 10 minutes. |
| 1633 | UV flashes, IR flashes, unplugging and replugging in the switchboard and cables, as well as power cycling the DCRC boards do not work to remove the noise that requires a trigger threshold of at least 3500 ADC bins to work around. Trying a good old fashioned 14 hour IR bake to try and set things right. |
| 1638 | Fill LN2 cold trap full. |