2015/09/01 (Tuesday)
| Current setup: DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50. Overnight, Cf source in shield activating detector, detector baking | |
| 0920 | Remove Cf-252 source |
| 0925 | Tower = 261 mK, Still = 0.11 mbar, G1/G2 = 175 mbar, 1K Pot = 1.72 K / 22 mbar, Main bath = 15.1%. |
| 0927 | Stop baking detector. Tower falls to 32 mK after 30 minutes |
| 0930 | Fill LN2 cold trap Dewar |
| 1025 | Commence LHe transfer (13.1%). |
| 1100 | Finish transfer (67.7%). |
| 1330 | Take data: Start DAQDAQ2 taking 4 10-minute series of -/+4V data (Frontend Gain: 1, Output Gain: 3=setting), with standard 6s flash, 20min cooldown in between series. |
| 1540 | Data run finished. Apply -/+2V bias and check phonon threshold settings. |
| The values from yesterday still give good triggering. | |
| 1551 | Zero charge bias and flash for 30s. |
| Modify DAQ files in MultiDAQ for -/+2V data. Nominal Qi/Qo values in below table: |
| Qi | Qo | |
|---|---|---|
| DCRC55 | -1.995V | -1.962V |
| DCRC33 | 2.3659V | 2.3831V |
| 1607 | Mixing Chamber at 31.7mK. Take data: Start DAQDAQ2 taking 4 10-minute series of -/+2V data (Frontend Gain: 1, Output Gain: 3), with standard 6s flash, 20min cooldown in between series. |
|---|---|
| 1715 | TCP/IP error from MultiDAQ during 2nd data series. One of the connections to DCRC50 didn't close properly, so the next time MultiDAQ started up and tried to connect, it threw the error. Stop DAQDAQ2 and flash to neutralize crystal. |
| To confirm and fix the connection issue: | |
|---|---|
| 1 | Make sure all LabVIEW programs are stopped or at least disconnected from DCRCs. |
| 2 | Send sock to all three DCRCs via Putty. |
| 3 | Make a note of any connections to port 1. |
| 4 | Send quit 1 to any DCRCs that are still connected on port 1. This quits that specific connection and MultiDAQ should be able to connect the next time it starts up. |
| 1729 | Take data: Start DAQDAQ2 to take 1 last 10-minute series of -/+2V data. |
|---|---|
| 1754 | Series done. Charge already zeroes thanks to DAQDAQ2. |
| Set to bake overnight. | |
| 1756 | Fill LN2 cold trap full. |
| 1820 | Place Cf source in shield near detector for overnight activation |