| 1056 | Let's try to set the HV bias with DCRC4 and take some biased IbIs data. |
| 1057 | Turn off DCRC programs and restart MIDAS. Enable DCRC4 in ODB. Make sure it is set as a timing slave and has DCRC4/Charge/Bias (V)[0] = 10.801 as well as DCRC4/Charge/Bias (V)[1] = 0. Start DCRC programs. |
| 1059 | Turn on the power supply by setting DCRC4/Charge/Bias (V)[1] = 2. Nothing happens. Programs have crashed and am unable to reach DCRC4 via telnet. |
| 1102 | Power cycle DCRC4, restart programs. Looks good now. Turn on the power supply by setting DCRC4/Charge/Bias (V)[1] = 2. Power supply starts up at HV ~ -0.2 V. |
| 1105 | Let's prebias for 5 min. Slowly ramp up to 52 V at 1V/sec by changing DCRC4/Charge/Bias (V)[0] by 0.1 V/sec by hand in the ODB. HV/DCRC4QI = 52.54/5.2 V |
| 1110 | Leakage voltage peaks at around 10 mV and starts falling. |
| 1115 | Slowly ramp down to 45 V at 1V/sec by changing DCRC4/Charge/Bias (V)[0] by 0.1 V/sec by hand in the ODB. HV/DCRC4QI = 45.07/5.99 V |
| 1117 | Begin IbIs data sequence on DCRC1pA with HV=45V from 650 to 300 uA in -1.0 uA steps, 3 seconds of data per step. (IbIsDCRC1pA.msl) |
| 1140 | HV = 44.99, V_leak = 2.28 mV |
| 1228 | Sequence completed, HV = 44.95, V_leak = 1.92 mV |
| 1230 | Slowly ramp down to 0 V at 1V/sec by changing DCRC4/Charge/Bias (V)[0] by 0.1 V/sec by hand in the ODB, then turning off the power supply by setting DCRC4/Charge/Bias (V)[1] = 0 |
| 1237 | Flash DCRCs 1,3 for 30s using flashandflash GUI. Tower temp peaks at 530 mK. |
| 1315 | Tower temp = 24.9 mK |
| 1316 | In preparation for installing NaI detectors and south shield wall, we'll need to move the turbo pump and leak checker. Turbo pump is currently on but not pumping on the IVC. Isolate IVC using 2 valves at top of fridge. Turn off the turbo pump, let it spin down. |
| 1401 | Remove turbo pump and leak detector. |
| 1504 | Install south shield frame with NaI detectors. Install north shield frame. |
| 1600 | Install south lead shielding and north poly shielding. |
| 1620 | Fill LN2 cold trap full. |
| 1627 | Restart MIDAS. |
| 1628 | Turn on the power supply by setting DCRC4/Charge/Bias (V)[0] = 10.76, DCRC4/Charge/Bias (V)[1] = 2. Power supply starts up at HV = 0.11 V. |
| 1630 | Let's prebias for 5 min. Slowly ramp up to 52 V at 1V/sec by changing DCRC4/Charge/Bias (V)[0] by 0.1 V/sec by hand in the ODB. HV/DCRC4QI = 52.52/5.2 V |
| 1636 | Slowly ramp down to 45 V at 1V/sec by changing DCRC4/Charge/Bias (V)[0] by 0.1 V/sec by hand in the ODB. HV/DCRC4QI = 45.02/5.99 V |
| 1639 | Begin IbIs data sequence on DCRC1pB with HV=45V from 600 to 300 uA in -1.0 uA steps, 3 seconds of data per step. (IbIsDCRC1pB.msl) |
| | note: looks like DCRC1pB and other channels were railed during this sequence. Will need to redo it. |
| 1650 | HV = 44.99, V_leak = 2.11 mV, tower = 23.4 mK |
| 1935 | Looks like the sequence finished. Ramp down the bias and turn off the power supply remotely. Unfortunately, the lights are off in the lab, so the webcam can't see the bias voltage. It can see the leakage, which responds as expected to bias changes. |
| 1950 | Flash for 30s using flashandflash gui. |
