2016/09/21 (Wednesday)
| 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. . | |
| Baked using UV LEDs for 9 hours last night. Tower was at 0.4 K until 07:17 then fell to base over about 40 minutes. | |
| 0835 | Tower/MC/Coldplate = 93/58/??(1.70 kΩ) mK, Still = 1.13 K / 85 μbar, G1/G2 = 160/150 mbar, 1K Pot = 1.51 K / 3.4 mbar. MB = 36.5% The thermometers connected to “FRIDGE OUT 1”/“SENSOR 1” cable to the thermometer breakout box seem to be reading wrong. Coldplate is off scale, Still is higher than usual. Boiloff rate: good 1K Pot has been pretty stable. |
| 0845 | Fill LN2 cold trap bath. |
| 1015 | Switch HV Switchboards and Flash&Flash python script back to using IR LEDs. Not flashing until after the first data series. |
| 1022 | Manually start 20min background data series at HV = 10V, DCRC1/Readout= -10V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1043 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1058 | Manually start 20min background data series at HV = 10V, DCRC1/Readout= -10V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1119 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1135 | Manually start 20min background data series at HV = 10V, DCRC1/Readout= -10V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1156 | Cease data run. Ground detector. Remove resistor from breadboard circuit (thus breaking the external circuit), and flip Qo-Feedback switch to ON. Apply -10V on Qo using DCRC1, and check pulses to see if threshold needs to be adjusted, but 150ADC Bins seems to trigger pretty well. |
| 1209 | Zero charge bias, and flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1225 | Check the pulses again, and the threshold looks fine. I've realized I forgot to turn off the logger for the past two times I checked the pulses with the SQUID GUI, so there will be some short runs that are just tests. |
| 1229 | Manually start 20min background data series at HV = 10V, DCRC1/Readout= -10V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1249 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1307 | Manually start 20min background data series at HV = 10V, DCRC1/Readout= -10V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1329 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1346 | Manually start 20min background data series at HV = 10V, DCRC1/Readout= -10V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1406 | Cease data run. Ground detector, and bake for 90 minutes with the IR LEDs during the transfer. |
| 1500 | Commence LHe transfer (26.8%). |
| 1610 | Cease LHe transfer (94.5%). |
| 1615 | Replace the resistor in the breadboard circuit (thus breaking the external circuit), and flip Qo-Feedback switch to ON. Apply -10V on Qo using DCRC1, and check pulses. It looks in working order. |
| 1620 | Let pressure out of the Main Bath. |
| 1637 | Now that the fridge is cool enough (Tower = 85mK), manually start 20min background data series at HV = 12V, DCRC1/Readout= -12V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1640 | Let pressure out of the Main Bath. |
| 1658 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1713 | Manually start 20min background data series at HV = -12V, DCRC1/Readout= 12V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1735 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. Release pressure from Main Bath. |
| 1739 | Fill LN2 cold trap full. |
| 1749 | Manually start 20min background data series at HV = 12V, DCRC1/Readout= -12V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1809 | Cease data run. Ground detector, bake with IR LEDs for 12 hours. |