| Status | Run 74 in progress. Warmed the fridge to fix short and thermal touch. Helium gas in cryostat vacuum jacket, partially pumped out. Mixture cryocleaned four times. IVC sealed and pumping overnight. |
| | Yesterday we saw high leak detector signal in IVC. Maybe this is because there is leftover He trapped in the IVC. Flushed it with N2 yesterday and pumped overnight. |
| 1413 | Derek enters lab. |
| 1415 | Turbo on IVC = 22 nbar. With Turbo valved out for 1 minute, IVC = 340 nbar. |
| 1417 | LD is powered on, waiting for it warm up and then calibrate. |
| 1438 | Pump on IVC with LD, close Turbo valve and wait 1 minute: 700 pbarL/s. |
| | this is significantly better than yesterday and but still high. Maybe it's actually He trapped slowly getting pumped out and not actually a leak. Let's try squirting around the seal. |
| 1450 | LD on IVC settles around 754 pbarL/s. Try blowing He around IVC joint, also at a few other points. No increase seen, suggesting leak <2 pbarL/s. |
| | This is a decent sign, maybe we are on the right track, we'll have to see how things look again Sunday. |
| 1459 | Valve out LD and return to pumping on IVC with the Turbo, we'll leave it in this state until I come in again on Sunday. |
| 1500 | Derek Leaves lab. |