| Status | Kept Turbo pumping on the IVC overnight. MC(H35) = 12 K |
| 1000 | Fill LN2 cold trap bath |
| |  |
| 1010 | Close IVC valves at top of fridge. |
| 1030 | Turn on 4He pump. Open Recovery valve to 4He pump. Pump out line to 1K pot (speedivalve closed). Check pressure in 1K Pot (with V4a open, 4He pump inlet valve closed). 1K Pot = 100 mbar on G3. |
| | Pump out 1K Pot slowly, throttling the flow at the valve at the pump inlet, opening just until the pump gets louder, then waiting, then opening a little more, etc. With pump just a little loud, can see pressure go down at the mechanical gauge. When this is low, open valve a bit more. When P2 starts to lower down, open valve all the way. |
| 1039 | Open 1K Pot needle valve → 15°. 1K Pot → – K / 40 mbar |
| 1218 | MC temp drops to 3 K and linearly dropping |
| 1222 | MC/Still = 3.09/3.00. G1(fridge+dump) = 350 mbar. |
| 1230 | Open 1K Pot needle valve → 45°(1 1/2 unit). 1K Pot → – K / 60 mbar |
| 1400 | MC/Still = 2.46/2.26 K. G1(fridge+dump) = 150 mbar, flattening. |
| 1405 | Close V5 and V9, leaving 150 mbar mixture in dump (G2) |
| 1406 | Turn on 3He pump. G1(condenser) → 200 mbar |
| 1408 | Start circulation through Trap 1. V2 → mark1 then slowly to mark 2. Condenser peaks at 450 mbar. MC(H35) → 2.01 K. Still → 2.05 K / – mbar |
| 1416 | V2 → mark2 then slowly to mark 3. Condenser peaks at 550 mbar. MC(H35) → 1.81 K. Still → 1.91 K / – mbar |
| 1421 | G2 was above 650 and rising, so i opened V9 to release some of the mixture back to dump to work with less mixture first |
| 1423 | G1 is 550. V2 is fully opened. Waiting to see P1 showing values. |
| 1428 | Close V8 and open v9 to do a one-shot way to pump on the still to lower the temp. open V8 again and close v9 |
| 1430 | open VT slowly to see if we can see a change in P1. turn about 60 deg at a time and look at G1 and P1. G1=300 mbar, p1=max out |
| 1433 | After a few turns, G1 =350 mbar, P1 = 1 atm, MC temp lowering |
| 1436 | After a few turns, G1 = 400 mbar, p1 = 2000 mTorr, MC lowering in steps/downward trending |
| | How to know if we have turned enough to cross the 100% mark? After turns, it won't have any effect on MC temp or P1. P1 hovers in the range 300-500 mTorr. MC flattening at 1.33 K |
| 1443 | Open V10 in steps, to pull the rest of the mixture out of the dump into circulation. Open V10 and wait a few seconds as P1 max out, Close V10, wait till P1 is in 300-500 mTorr range, repeat |
| 1453 | Still is much warmer 1.95 K. Lets do another one-shot to cool the still first and then repeat the above step |
| 1500 | One-shot instead increased the Still temp 5.5K. 1K Pot needle valve → 30° again to lower still temp. |
| 1505 | 1K Pot needle valve → 15° again to lower still temp. |
| | Since Still is very hot, 3-4 K, decided to stop circulation and retry tomorrow |