| 0855 | IVC pumping pressure = 1.0e-4 mbar, IVC pressure = 1.6e-2 mbar. Note: the Ebox vacuum seal was not completed last night, only a few clamps were in place. |
| 0900 | Turn on leak detector |
| 0905 | Complete Ebox seal |
| 0925 | Leak detector background 3.0 pbar*l/s isolated, 4.2 pbar*l/s when pumping on IVC |
| 0935 | Retighten lower IVC seal |
| 0945 | Leak check all connections at top of fridge. No leaks detected. Max signal 5.1 pbar*l/s. |
| 0947 | Leak check IVC seals. No leaks detected. Max signal 6.0 pbar*l/s. |
| 1030 | Pump and flush the main bath with He gas while performing leak check on IVC. Background leak rate was 6.1E-9 mbarL/s, and it rose to 6.2E-9 mbarL/s after filling main bath. No leak detected. |
| 1100 | Commence LN2 transfer. Add 4.6 mbar He exchange gas. Isolate IVC. |
| 1230 | LN Dewar empty (transfer hose went limp). Close LN Dewar. MC temperature (Cernox thermometer) 170 K and falling. |
| 1324 | Turned on He3 pump and pumped IGH contents to dump. After 90 minutes G2 (dump pressure) stabilized. |
| 1345 | Level resistor reading only 1.18 kΩ (should be around 1.3 kΩ if full), and during transfer there was never a significant plume of condensation, so it probably is not very full, may not last until tomorrow morning before warming again. |
| 1350 | MC (Cernox) = 122 K |
| 1430 | Start LN2 transfer again with freshly filled dewar, just to be safe. |
| 1506 | End LN2 transfer. Currently MC (Cernox)=99 K. Level resistor reading 1.3 kΩ. |
| 1530 | Dump pressure: G2 reading 802.2 mbar. Barometric pressure 29.87 “Hg, so corrected dump pressure = 800.5 mbar. |
| 1638 | Finish LN electrical checkout at about 86 K. Looks good. On DIB1, Feedback D/Ret read very high, 0.7 MΩ, but unplugging/replugging the cable at the Ebox brought it to a reasonable value (25 kΩ, still actually a little high). Something similar happened in yesterday's room temperature checkout, on a different DIB - it seems that maybe it's an intermittent problem with the cable to the breakout box. |
| 1740 | Start pumping out He exchange gas with scroll pump, switch to turbo pump once IVC pressure drops to 5.4E-2 mbar. MC temperature at 81 K. |
| 1743 | Cease pumping on fridge lines by closing gate valve and V6. G2=804 mbar. ← “fridge lines” doesn't include the actual fridge I think, i.e. between the condenser and gate valves |