2017/09/15 (Friday)
| 1000 | Swap DIB3/4 SQUETs. Now DIB3 is ZC-26, DIB4 is ZC-37 |
|---|---|
| 1055 | Finish electrical checks on DIBs 3 and 4. Both look OK. |
| 1215 | Finish the 4K stage, prepare the indium seal and sealed the IVC. Took down the clean room. Checked screw tightness of other indium seals, seemed fine. |
| 1220 | Begin pumping slowly on IVC with scroll pump. Pressure = 0.74 bar. |
| 1233 | Open scroll pump valve completely. |
| 1240 | Scroll pump (IVC) = 0.16 mbar |
| 1247 | Tighten screws on all four IVC indium seals. |
| 1330 | Scroll pump (IVC) = 63 μbar. Begin pumping IVC with turbo pump. |
| 1400 | Turbo pump (IVC) = 1.2 μbar. Valve out pump for a few minutes: IVC > 73 μbar |
| 1430 | Turbo pump = 0.63 μbar, IVC = 100 μbar |
| 1440 | Start pumping IVC with leak detector (valve out turbo pump). Settling at about 10 pbarL/s |
| 1445 | LD = 7.6 pbarL/s |
| 1455 | Squirt-test around all IVC joints. No leaks - including the top of the stripline tube! So we've fixed that. LD signal rose no higher than 9 pbarL/s. |
| go back to pumping IVC with turbo pump | |
| 1630 | Turbo pump = 0.46 μbar, IVC = 54 μbar |
On Monday:
- do a room temperature throughput test with LD on IVC (to make sure we haven't sprung a leak on the MC like in Run 60)
- need to fill LN Dewar, then proceed with cooldown