2023/03/29 (Wednesday)
* Lab in-personnel: Zach, Himangshu
| IVC open. Mixture in dump. Warm LN2 Trap 1 clean. Fridge de-installed up to MC so we can tighten MC screws | |
| 1610 | Let helium (about 180 mbar on G3) into 1KPot through speedivalve |
| 1618 | Close 1KPot speedivalve then pump out lines with scroll pump to clean them out |
| 1636 | Remove needle valve fully (18.5 rotations) and bring into clean room entryway, plug needle valve port after. |
| The top o-ring seems quite dirty (can even see a small hair on it), the bottom o-ring is much cleaner however. The needle is slightly off color and “squeezed” a few mm from the tip, not bent in any particular direction though. | |
| Going to buy new o-rings for the needle valve from the chem stockroom tomorrow (T47 4105X, 3/8×1/4×1/16) |