| Status | Run 74 in progress. Warmed up after 3rd appearance of IVC leak at 4K, rebuilt IVC. Cryostat Vacuum Jacket pumped out. Mixture cryocleaned three times. |
| | IVC pumping over the weekend |
| 1150 | Turbo on IVC = 46 nbar. With Turbo valved out for 1 minute, IVC = 460 nbar. |
| 1155 | Connect leak detector to IVC, valve out Turbo. |
| 1155 | IVC = 13 pbarL/s. |
| 1312 | Leak check around top of the fridge and indium seals, stayed around 5.8 pbar*L/s |
| 1325 | Remove clean tent from fridge |
| 1335 | Electrical check on DIB1: looks good, nominally the same as April 13, except shorts-to-chassis are all higher, ~0.3 nS for the FET-related ones, around 0.6 nS for bias. I'll chalk this up to the high humidity today. |
| 1505 | Leak check around top of the fridge and indium seals, stayed around 9.3 pbar*L/s |
| 1525 | Raise main bath |
| 1335 | Electrical check on DIB2+accessories: looks good, nominally the same as April 13, except shorts-to-chassis are all higher, 0.2-0.6 nS for the FET-related ones |
| 1700 | Attach and tighten all the MB bolts. (Much easier this time.) |