| Status | Run 74 in progress. Warmed up a second time to fix the DIB2qI short which reappeared at around 130 K. Cryostat Vacuum Jacket pumped out, MB in pit. Some He in IVC. Mixture in dump. |
| 1350 | Matt enters lab |
| 1355 | Check pressure in IVC: 19 mbar. This is helium - let's pump it out for a bit before filling the IVC with N2. |
| 1400 | Pump out IVC with Scroll, switch to Turbo @ <0.1 mbar. |
| 1400 | Remove fill funnel from fridge, then install clean tent with yoga mats underneath |
| 1405 | Connect HEPA filter hose to clean tent and turn on (plug in filter fan |
| 1415 | Clean dust from clean tent interior and IVC with methanol |
| 1415 | Stop pumping He out of IVC after about 15 minutes. |
| 1415 | Begin slowly filling IVC with N2 gas |
| 1435 | IVC reaches >1 atm (I had all but 2 bolts removed, the last two loosened a few threads - IVC popped open.) |
| 1440 | Remove IVC bottom |
| 1445 | Detach 4K heatsinks from tower |
| 1450 | Quick electrical check of DIB2 (Cable3) - no shorts in the charge channels, as expected. |
| 1455 | Detach accessory plugs from NW face and remove SQUET from W face, remove SQUET with diverter board from SL 43 |
| 1505 | Remove SQUET ZC-13 from E face and detach from SL 41 |
| 1510 | Remove tower socket covers at three unused tower faces |
| 1515 | Detach 4K shield from IVC |
| 1525 | Remove 100 mK heat sinks and detach 600 mK rod from tower |
| 1530 | Remove inner 100 mK shield pieces |
| 1540 | Remove outer 100 mK shield pieces |
| | Notice that some of the pieces of kapton tape I used to tape down the thermometer wire around the bottom of the 30 mK can on one side, making a touch between 30 mK and 100 mK. But probably low conductivity. |
| 1545 | Remove tape holding thermometer wire to 30 mK can and unplug tower thermometer |
| 1545 | Remove cap from bottom hole of tower |
| 1555 | Remove 9 of the 30 mK can bolts, leaving 3 to hold it up. |
| 1620 | Put black electrical tape around inner edge of tower stand ring, to cushion the bottom surface of the IVC from scratches. Recently I identified attaching this ring as a potential source of scratches on the indium o-ring surface.  |
| 1630 | Attach tower stand to IVC to hold up tower. |
| 1635 | Remove final 3 30mK can bolts from tower adapter |
| 1640 | Put scissor jack on top of red drill case and raise jack up to bottom of tower stand |
| 1650 | Lower tower carefully, guiding 600mK rod past parts of tower, making sure it doesn’t hit the accessory connections. Continue until nuts on threaded rods are near the top of the rods, then tighten nuts so that tower is again supported by tower stand. |
| 1655 | Remove red drill case, then raise jack to support tower stand. Remove threaded rods from stand. |
| 1700 | Remove fridge stand ring from IVC and lower it down to the bottom on the shafts. It’s a little tricky to do it at this stage because you have to pull the striplines through, probably makes sense to wait till the end. |
| 1705 | Lower jack as low as it will go, guiding both the 600 mK rod and the stripline ends. |
| 1705 | Pull jack+tower stand away from IVC, pulling shafts slightly apart to clear the IVC. Remove tower stand from jack. |
| 1710 | Double-bag tower and move it to clean room anteroom |
| 1715 | Matt exits lab |