| 1333 | MC(H35) = 5.54 K, G1/G2 = 543/503 mbar, MB = -1.0% |
| | Begin another cooldown |
| 1340 | Begin LHe transfer @ MB = -1.0% |
| 1342 | Fill LN2 cold trap dewar |
| 1344 | Turn on 4He pump. Open Recovery valve to 4He pump. Pump out line to 1K pot (open V4a, close 1K pot speedivalve and slowly open the 4He-pump inlet valve).Close the 4He-pump inlet valve once done. Check pressure in 1K Pot (with V4a open, 4He pump inlet valve closed). 1K Pot = 0.23 bar (-23 inHg) on mechanical gauge. |
| 1346 | Pump out 1K Pot slowly, opening the 4He pump valve until it just starts to make noise, then opening it more when it becomes more quiet. |
| 1348 | Open 4He pump valve fully |
| 1350 | Turbo on IVC = 1.0 nbar, after being valved out for 1 min IVC = 10 nbar, open turbo again and close valves to IVC |
| 1356 | MC(H35) = 5.49 K, cooling slowly, 1K Pot = 3.3 K / 1.8 mbar, MB = 34.8% enough to start 1K Pot. |
| 1357 | Open 1K Pot needle valve → 15° (half a unit mark). 1K Pot (P2) → 2.85 K / 7.5 mbar |
| 1403 | MC temp dropping |
| 1405 | MC(H35) = 3.23 K, Open 1K Pot needle valve → 30°. 1K Pot → 2.15 K / 22 mbar. |
| 1420 | MC(H35)/1Kpot = 2.81/1.67 K, MC temp dropping linearly. G1/G2 = 216/215 mbar . 1K Pot(P2) = 20 mbar. |
| 1429 | Ended LHe transfer @ MB = 95.6% |
| 1438 | MC temp is around the He transition point (2.17K), P2 = 13 mbar |
| 1511 | MC(H35)/1Kpot = 1.90/1.61 K and flat. G1/G2 = 48.6/51.0 mbar . 1K Pot(P2) = 20 mbar. |
| 1512 | Close V3 and V9, leaving 51.0 mbar mixture in dump. |
| 1513 | Turn on 3He pump |
| 1515 | Start circulation through Trap 1. V6 → 12.6%. Condenser(G1) peaks at 329 mbar. MC(H35) → 1.45 K. Still → 1.48 K / 26 mbar. |
| 1525 | V6 → 13.0%. Condenser(G1) peaks at 244 mbar. MC(H35) → 1.25 K. Still(P1) → 1.28 K / 6.0 mbar. |
| 1530 | V6 → 13.4%. Condenser(G1) peaks at 252 mbar. MC(H35) → 1.14 K. Still(P1) → 1.17 K / 3.8 mbar. |
| 1535 | V6 → 13.8%. Condenser(G1) peaks at 248 mbar. MC(H35) → 1.05 K. Still(P1) → 1.12 K / 2.2 mbar. |
| 1540 | V6 → 14.4%. Condenser(G1) peaks at 254 mbar. MC(H35) → 0.85 K. Still(P1) → 1.11 K / 1.2 mbar. |
| 1545 | V6 → 15.0%. Condenser(G1) peaks at 256 mbar. MC(H35) → 0.62 K. Still(P1) → 1.11 K / 0.75 mbar. |
| 1553 | V6 → 100.%. Condenser(G1) peaks at 257 mbar. MC(H35) → 0.24 K. Still(P1) → 1.05 K / 0.2 mbar. |
| 1639 | MC(H35) = 31.8 mK, Tower(Rox) = 64.9 mK and pretty flat, G1 = 172 mbar and pretty flat. 1K Pot = 1.61 K / 20 mbar. |
| 1641 | Open V14 to pull the rest of the mixture out of the dump into circulation. |
| 1644 | MC(H35) rises to 75 mK (Tower Rox to 89 mK), Still rises to 70 mbar then falls again, Condenser(G1) rises to 255 mbar. 1K Pot unaffected. |
| 1733 | P1 = 0.38 mbar (<1), close V14 |