2023/03/15 (Wednesday)
* Lab in-personnel: Zach, Himangshu
| 1406 | Turbo on CVJ = 12 nbar, after being valved out for a min CVJ = 0.19 ubar. Open turbo valve again and close CVJ valve. |
|---|---|
| 1410 | Valve out turbo and disconnect line to CVJ (IVC closed) so that we can lower the main bath. |
| 1420 | Pump out pump lines with scroll pump then switch to turbo pump at 0.1 mbar |
| 1430 | Start removing screws to lower main bath. Loosen medium screws at bottom, loosen two large screws at top but keep them snug, remove all small screws at top, remove medium screws, then large screws at top. The shortened 5/16 Allen key that's necessary to remove two screws that are located under fridge insert brackets is kept in the plastic box with the Dewar screws. |
| 1604 | Completely removed main bath screws and lowered main bath |
| – | Check contents of warm LN2 Trap 1: 97 (99.7 on G1) mbar. Pump it out with the scroll pump. |
| – | G1 = 2.8 mbar and stable, stop pumping on trap 1. |
| – | Open IVC valve to start pumping with the turbo. |
| – | Start slowly letting N2 gas into IVC. Hook up the N2 line to the gauge and it reads about 10 mminHg, slowly open the valve so that the gauge slowly creeps up(currently at 5.4e1 mbar on the digital reading), wait until it the pirange gauge goes upto -1 mminHg. |
| – | IVC is up to 1atm of N2. MC = 283.3 K. |