| 1121 | Started refilling LN2 |
| 1133 | Stopped refilling LN2 |
| | Cooling to base today |
| 1310 | 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 on mechanical gauge. |
| 1311 | 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. |
| 1316 | Start pumping 1K Pot continuously |
| 1338 | Started LHe transfer @ MB = 33.9% |
| 1344 | MC(H35) = 4.46 K, cooling slowly. 1K Pot = 3.2 K / 1.5 mbar |
| 1347 | Turbo on IVC = 1 nbar, after being valved out for 1 min IVC = 10 mbar, close valves to IVC |
| 1354 | Open 1K Pot needle valve → 15° (half a unit mark). 1K Pot (P2) → 2.63 K / 8.0 mbar |
| 1356 | MC temperature falling MC(H35) = 3.57 K |
| 1402 | Open 1K Pot needle valve → 30°. 1K Pot → 1.85 K / 28 mbar. MC(H35) = 3.08 K |
| 1413 | MC(H35)/1Kpot = 2.69/1.66K still dropping linearly. G1/G2 = 193/202 mbar . 1K Pot(P2) = 26 mbar. |
| 1428 | P2 = 14 mbar now, Open 1K Pot needle valve → 45°. 1K Pot → 1.60 K / 18 mbar. MC(H35) = 2.14 K |
| 1504 | MC(H35)/1Kpot = 1.88/1.674 K still dropping linearly. G1/G2 = 49/52 mbar . 1K Pot(P2) = 40 mbar. jumped to 110 mbar and came back to 40 mbar and stable. Close back 1K Pot needle valve → 30° |
| 1508 | 1K Pot(P2) = 30 mbar |
| 1510 | MC(H35)/1Kpot = 1.86/1.63 K still dropping linearly. G1/G2 = 48/51.8 mbar . 1K Pot(P2) = 28 mbar. |
| 1511 | Additional Step: Close V2 (only today). Close V3 and V9, leaving 51.9 mbar mixture in dump. P2 stable at 28 mbar. |
| 1513 | Turn on 3He pump |
| 1514 | Start circulation through Trap 1. V6 → 12.6%. Condenser peaks at 315 mbar. MC(H35) → 1.43 K. Still → 1.45 K / 14 mbar. Took about 2 minutes for P1 to start reading below max. |
| 1528 | V6 → 13.0%. Condenser(G1) flattened at 178.5 mbar. MC(H35) → 1.17 K. Still(P1) → 1.27 K / 5.0 mbar. |
| 1531 | Turned on all DCRCs. |
| 1540 | V6 → 13.4%. Condenser(G1) peaks at 189 mbar. MC(H35) → 1.08 K. Still(P1) → 1.18 K / 3.6 mbar. |
| 1548 | V6 → 13.8%. Condenser(G1) peaks at 192.6 mbar. MC(H35) → 0.88 K. Still(P1) → 1.19 K / 2.4 mbar. |
| 1555 | V6 → 14.4%. Condenser(G1) peaks at 194 mbar. MC(H35) → 0.60 K. Still(P1) → 1.16 K / 1.2 mbar. |
| 1601 | V6 → 15.0%. Condenser(G1) peaks at 187.7 mbar. MC(H35) → 0.33 K. Still(P1) → 1.16 K / 0.6 mbar. |
| 1609 | V6 → 100%. Condenser(G1) peaks at 184 mbar. MC(H35) → 0.145 K. Still(P1) → 1.12 K / 0.18 mbar. P2 remain steady at 28 mbar during the process of opening up V6 |
| 1654 | MC(H35) = 31.6 mK and pretty flat, G1 = 125.0 mbar and pretty flat. 1K Pot = 1.64 K / 26 mbar. |
| 1655 | Open V14 to pull the rest of the mixture out of the dump into circulation. |
| 1655 | MC(H35) rises to 75 mK, Still peaks at 55 mbar then falls again, Condenser(G1) rises to 191 mbar. 1K Pot unaffected. |
| 1659 | MC(H35) rises further to 78 mK, then falls |
| | To correct the mistake of opening the mixture to V2, Matt suggested opening V8 (which connects to the same volume) during this step |
| 1703 | P1 = 3.8 mbar, Open V8 to pump the mixture left in that line (from opening V2 before) into the fridge |
| 1704 | everything seems unaffected, P1 did not rise at all. |
| 1709 | MC temp rising again a small amount, currently at 42 mK from 36 mK |
| 1721 | P1 = 0.7 mbar (<1), close V8 and V14. |
| 2036 | Zapped DCRC4. I tried tuning the SQUIDS and found the following SQUIDS+channels working |
| | DCRC1 PA/PB/PC/PD = (SQUID is not showing modulation)Side2pC/Side2pF/Side1pC/Side1pF |
| | DCRC3 PA/PB/PC/PD = Side1pE /Side1pB /Side1pD/ Side2pE |
| | DCRC4 PA/PB/PC/PD = (SQUID is not showing modulation)Side2pB/ (SQUID is not showing modulation)Side2pA/ Side1pA/ Side2pD |
| 2121 | Started miniIbIs points |