2016/09/13 (Tuesday)
| Status: fridge at room temperature, cryostat Dewar is down, IVC is open. Mixture is in dump and 3He pump, manual dump valves are closed. |
|
| 1100 | Reinstall middle section of IVC |
| 1200 | Put up clean tent |
| 1320 | Reattach still pumping line to still port at the gate valve and begin pumping out the still pumping line (the P1 volume) with the scroll pump. The scroll pump is attached to the 1K Pot pumping station - pumping through V5a, V2a, V7, and V8. |
| 1330 | P1 = 2.5 mbar and falling, P2 = 50 μbar and falling |
| 1340 | P1 = 600 μbar and falling, P2 = 20 μbar and flattening |
| 1350 | P1 = 360 μbar and falling, P2 = 17 μbar |
| 1355 | Close V8 to stop pumping out still line temporarily. Reattach condenser line to fridge at speedivalve. Open V2 and V1 to pump out condenser (also the LHe cold trap) with the scroll pump. |
| 1357 | Installing tower (again). Orienting with face 5 (readout) East and face 2 (Bias) West. |
| 1405 | G1 ≈ 700 μbar and pretty flat, P2 = 15 μbar and flat |
| 1410 | Open V8. Now pumping on the still pumping line (P1 volume) and the condenser line (including LHe trap) simultaneously. |
| 1420 | P1 = 260 μbar and falling, G1 is still around 1 mbar, P2 = 16 μbar |
| 1445 | P1 = 130 μbar and falling, P2 = 14 μbar |
| 1515 | P1 = 70 μbar and falling, P2 = 13 μbar |
| 1535 | P1 = 55 μbar and falling, P2 = 13 μbar |
| 1635 | P1 = 36 μbar and falling slowly, P2 = 12 μbar Close all valves, turn off scroll pump to give it a rest. |
| 1505 | Both SQUETs installed and electrical checks are good. |
| 1740 | Attach bottom flange of IVC and begin tightening. Electrical checks look good again. |
| 1750 | Commence pumping on IVC as bottom flange is in final stages of tightening. |
| 1800 | Remove the clean tent and switch to turbopumping on IVC. Tomorrow after final tightening of IVC screws, IVC should be ready to leak check before raising dewar. |