| 1251 | Fill LN2 cold trap bath from 5L dewar. |
| 1256 | MC(Cernox)/Sorb/1K Pot = 4.75/–/–, G1/G2 = 455/445 mbar, MB = 71.7% |
| 1257 | Turbo on IVC = 86 nbar. With Turbo valve out for 1 minute IVC = 100 nbar |
| – | P2 is up again after Himangshu pumped out the 1kpot on saturday, need to swap back to the scroll pump and redo it |
| 1300 | Pump out line leading to 1K Pot with scroll pump (V4a open, V1a closed, 1kpot speedivalve closed). Then switch the line over to the 4He pump. Turn on 4He pump and make sure the pump exhaust is connected to recovery and open valve to recovery lines. |
| 1307 | Check pressure in 1K Pot by opening the 1kpot speedivalve with V4a closed: Mechanical gauge = 300 mbar on G3. |
| 1311 | Pump out 1K Pot by slowly opening V4a then the manual valve at the 4He pump until it just starts to make noise, once it quiets down somewhat open it up a little more. continue this until the valve is fully open. |
| | Leaving mixture in the fridge when starting 1K pot. P2 = 1 mbar |
| 1315 | Open 1K Pot needle valve → 15° (half the unit on the needle marks). 1K Pot → – K / 10 mbar. |
| | Temp dropping slightly, MC(cernox) = 4.7 K |
| 1324 | Open 1K Pot needle valve → 30°. 1K Pot → – K / 25 mbar. |
| 1325 | Temps start to drop, mixture pressure starts to drop |
| 1326 | MC(H35) temp drops, flattens at around 3.2 K |
| 1331 | We will keep 1K pot needle valve at close to 30 deg since P2 is already ~ 30 mbar(we try to keep it in this range in earlier runs) |
| 1338 | MC(Cernox)/Sorb/MC(H35) = 2.68/–/2.60, 1K Pot = – K / 30 mbar. G1 (fridge+dump) = 200 mbar. |
| 1350 | MC(Cernox)/Sorb/MC(H35) = 2.15/–/2.09, 1K Pot = – K / 15 mbar. G1 (fridge+dump) = 60 mbar. |
| 1350 | Close V5 and V9, leaving 60 mbar in the dump. Turn on 3He pump. |
| 1356 | Start circulation through Trap 1. V2 → Mark 1+ mark2. Condenser(G1) peaks at 150 mbar. P2 jumps to 40 mbar before falling again. MC(H35) → 1.76 K. Still(P1) → 1.78 K / max mbar. |
| 1406 | V2 → mark 3. Condenser(G1) peaks at 160 mbar. MC(H35) → 1.44 K. Still(P1) → 1.47 K / max mbar. |
| 1413 | V2 → mark 4. Condenser(G1) peaks at 160 mbar. MC(H35) → 1.15 K. Still(P1) → 1.25 K / max mbar. P2 rise to 60 mbar and then came back to 10 mbar |
| 1425 | Made two full turns slowly while keeping G2 and P2 stable but no lower temp. MC temp seems to be going up again after 1.168 K |
| 1450 | After slowly opening VT(earlier called V6) and keeping an eye on G2, MC started showing more cooling at a point. VT(earlier called V6) must be ~12% at this point. Condenser(G1) peaks at 200 mbar. MC(H35) → 0.86 K. Still(P1) → 1.14 K / – mbar. |
| | P2 is not sensitive at this point so we can just monitor G1 while opening the VT valve |
| 1511 | VT might be fully open → 100.%. Condenser(G1) peaks at 200 mbar. MC(H35) → 0.070 K. Still(P1) → 1.14 K / 400 mTorr. |
| 1516 | Open V6 to let the remaining mix out of the dump and into circulation. P1(Still) didnt peak. MC(H35) didnt peak. Condenser didnt peak. |
| 1517 | close V6 |
| 1519 | Tower(U28)/MC(H35)/Coldplate = 117/41/153 mK, Still(P1) = – / 300 mTorr / 0 mW, G1/G2 = 140/100 mbar, 1K Pot(P2) = 30° / – K / 32 mbar, MB = 68% |