| | Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50 |
| | Taking Y-Be data overnight, last flash ~ 7:20. |
| 0905 | Tower/MC(H35)/MC sensor/Cold Plate = 31.6/28.0/42/161 mK, Still = 1.19 K / 0.085 mbar, G1/G2 = 125/115 mbar, 1K Pot = 1.52 K / 2.2 mbar, Main bath = 37.6% |
| 0910 | Remove Y source from fridge. |
| 0915 | Tweak 1K Pot needle valve open additional 5 degrees. After 15 minutes pressure falls below 10 mbar again, continues to fall slowly. Still pressure increases to 0.12 mbar and tower base temperature improves a couple of tenths of a mK. |
| 0920 | Fill LN2 cold trap Dewar. |
| 1235 | Checked phonon channels: DIB2pA, DIB3pA, and DIB3pB are railed. In the process of trying to fix them, the pulse viewer GUI got stuck at some point and I shut it down and ended the run on the web interface. Since then I've had trouble making the GUI work. It starts OK and seems to run but when you select a channel nothing appears in the window, not even a flat line, or gridlines or axes or anything. |
| 1240 | Discovered the problem - it seems that triggerfe2 crashed. Restarting it makes the GUI work again. |
| 1240 | Fixed the railed channels with simple relocks. All channels now OK. |
| 1245 | Start test background series with standard setup at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1310 | I had intended yesterday to test the filter board on DIB3 with only the pB lines filtered, but due to an apparent miscommunication, the charge lines were also filtered. |
| 1315 | Switch on filters on the pB lines only: 35, 29, 47, 48, 33, 19 34, 2, 18. |
| 1345 | Unpower DCRC50, detach DSUB pi-filter connector, attach pi-filter switchboard, and repower DCRC50. Zap SQUIDs. |
| 1358 | Start test background series with pi-filter switchboard with only phB lines filtered at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1415 | Unpower DCRC50, switch off pB SQUID and Feedback related lines, so only pB QET and QET Return lines are filtered (lines 35, 29, 47, 48, 33), and repower DCRC50. Zap SQUIDs. |
| 1430 | DIB1 pC and DIB2 pA are railed. Adjust Driver Offset to fix. All other channels are good. |
| 1455 | Start test background series with pi-filter switchboard with only phB QET lines filtered at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1505 | Unpower DCRC50, switch off pB QET and QET Return related lines and switch on filters for SQUID and Feedback related lines (lines 19, 34, 2, 18), and repower DCRC50. Zap SQUIDs. |
| 1515 | DIB3 pA and DIB2 pA are railed. Adjust Driver Offset to fix. All other channels are good. |
| 1519 | Start test background series with pi-filter switchboard with only phB SQUID and Feedback lines filtered at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1530 | Commence LHe transfer (27.7%). |
| 1535 | Unpower DCRC50, detach pi-filter switchboard, attach DSUB filter connector, and repower DCRC50. Zap SQUIDs. |
| 1558 | DIB3 pA is railed. Adjust Driver Offset to fix. All other channels are good. |
| 1600 | Fill LN2 cold trap full. |
| 1616 | Finish LHe transfer at 90.5% |
| 1630 | Let pressure out of main bath by removing fill port stopper for 30 seconds |
| 1640 | 1K Pot down to 1.60 K / 6.0 mbar, still down to 0.10 mbar. Tweak needle valve open another 5 degrees |
| 1645 | Start 15.2 hours of 30min Y-Be series at -4/+4 V with FG=5/2/5, OG=3, with 1000 initial randoms, 1000 ending randoms, with 30s flash and 25 minute cooldown in between series. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. |
| 1700 | Place Y-88 source at fridge shielding. |