| | Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50. |
| | Overnight: no data, no source. Tower temperature stable. |
| 0855 | Fill LN cold trap Dewar |
| 0905 | Tower/MC(H35)/MC sensor/Cold Plate = 31.1/25.5/41.3/160 mK, Still = 1.34 K / 0.080 mbar, G1/G2 = 160 mbar, 1K Pot = 1.73 K / 22 mbar, Main bath = 25.6% |
| | G1 typically reads higher than G2, probably due to an offset. Today the difference between them is smaller than usual. This suggests G2 is rising relative to G1 which might point to a buildup in the cold trap. Suggest switching to the other trap today. |
| 1107 | Removed Cold Trap 2 from LN2 bath and allow to warm to room temperature for pumping out. |
| 1200 | Close He4 Pump exhaust recovery and valve 4a temporarily to let dirt from Cold Trap 2 into P2. |
| | P2 rose from 0.2mbar to 0.8mbar, so very little dirt was in Cold Trap 2. Pump out until P2 < 0.2mbar, then close off Cold Trap 2 from He4 pump, and reopen valve 4a and He4 Pump exhaust recovery. 1K Pot temperature had risen to 2.3K, but then quickly dropped back to ~1.7K. Place Cold Trap 2 back in LN2 bath. |
| 1220 | Following the procedure from the Run Manual, switch to circulating through Cold Trap 2. P1 increased to 160mbar while extracting remaining mixture from Cold Trap 1 through V11a and V8, but quickly declined back to usual levels. |
| 1315 | Pulses look good. Set phonon thresholds to values from Friday. Start DAQDAQ to take 2 15-minute series of -/+4V data with 1000 initial randoms and 2000 events/file with 30s flashing and 30min cooldown in between. |
| 1535 | Commence LHe transfer (14.7%). |
| 1703 | End LHe transfer (91.2%). |
| 1717 | Start 20 cycles of 15 minute series of -/+4V background data with 1000 initial randoms and 2000 events/file with 30s flashing and 30min cooldown in between. Frontend Gains = 5/2/5, Output Gain = 3. It should complete at ~9am tomorrow morning. |
| 1730 | Fill LN2 cold trap full. |