2016/09/22 (Thursday)
| 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 IR LEDs for 12 hours last night. Tower was at 0.55 K until 06:12 then fell to base over about 50 minutes. | |
| 0835 | Tower/MC/Coldplate = 90/57/??(1.9 kΩ) mK, Still = 1.12 K / 95 μbar, G1/G2 = 175/160 mbar, 1K Pot = 1.57 K / 6.0 mbar. MB = 77.3% 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, MC Sensor = 78 mK Boiloff rate: good. Yesterday the main bath pressure was released at 10, 30, and 85 minutes after a 94.5% fill (unusually high) 1K Pot has been pretty stable. |
| 0840 | LN2 storage Dewar is empty… |
| 0845 | Set still heater to 2.0 mW. Doesn't really help the base, tower becomes a bit oscillatory, 87-91 mK |
| 0915 | Turn off still heat |
| 1012 | Tower temp seems more stable, 87-89 mK, but varying more slowly than during still heating. |
| 1020 | Manually start 15min 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. |
| 1038 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1050 | Place Ba source near top of shield. |
| 1058 | Manually start 15min 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. |
| 1114 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1134 | Fill LN2 cold trap full. |
| 1136 | Manually start 15min background data series at HV = -11V, DCRC1/Readout= 11V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1152 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1220 | Manually start 15min background data series at HV = 11V, DCRC1/Readout= -11V with FG=5, OG=8, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 1237 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1301 | Manually start 15min 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. |
| 1324 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1335 | Watch pulses while raising and lowering Ba-133 source. Find that 8“ below top of shield strikes a good balance between more events but not too much pileup. Increase DIB1 Qo trigger threshold to 200 ADC Bin. |
| 1345 | Cease data run. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1500 | Cease data tests. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1516 | Manually start 15min background data series at HV = 36V, DCRC1/Readout= -12V, with 1000 initial randoms, 1000 ending randoms with 200 ADC Bin trigger threshold on DIB1 Qo. |
| 1542 | Cease data tests. Ground detector, flash with IR LEDs for 30s, then cool down for 20 minutes. |
| 1600 | Manually start 15min background data series at HV = 10V, DCRC1/Readout= -10V, with 1000 initial randoms, 1000 ending randoms with 200 ADC Bin trigger threshold on DIB1 Qo. |
| 1620 | Cease data tests. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1633 | Manually start 15min background data series at HV = -9V, DCRC1/Readout= 9V, with 1000 initial randoms, 1000 ending randoms with 200 ADC Bin trigger threshold on DIB1 Qo. |
| 1700 | Cease data tests. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1714 | Manually start 15min background data series at HV = 9V, DCRC1/Readout= -9V, with 1000 initial randoms, 1000 ending randoms with 200 ADC Bin trigger threshold on DIB1 Qo. |
| 1731 | Cease data tests. Ground detector, flash with IR LEDs for 30s, then cool down for 10 minutes. |
| 1734 | While cooling down, flip switches on HV Boards to use UV LEDs, and change Flash&Flash code. |
| 1740 | Place Ba source back in safe. |
| Fill LN2 cold trap full. | |
| 1744 | Ready for 0V overnight data. Use Flash&Take script. Start 4 hours of 20min background data series at HV = 0V, DCRC1/Readout= 0V, with 1000 initial randoms, 1000 ending randoms with 150 ADC Bin trigger threshold on DIB1 Qo. |
| 2255 | Commence 8 hour UV bake. |