2022/01/28 (Friday)
- Lab in-personnel: Matt
| Status | Run 75 in progress |
|---|---|
| Setup | Tower Faces 5/3/2 → Cables 2/1/3 → nothing/diverter_board/nothing → DCRC55(1)/DCRC50(3)/DCRCx(4) Lead shield in place. Am Source y = 0.03 mm |
| 1250 | Goldman/Tower/MC(H35)/Coldplate = 41.1/71.8/33.6/178 mK, Still = 1.37 K / 0.110 mbar / 0 mW, G1/G2= 264/232 mbar, 1K Pot = 1.59 K / 11±1 mbar, MB = 32.3%. |
| 1320 | Pump out vacuum jacket of the transfer line. The transfer line was getting kinda cold at the beginning of a transfer, though it was ok later after the air froze out. I borrowed a pumpout connector from Mike Rother, attached to the pump manifold, isolated the IVC and turbo, hooked up the Scroll pump and attached the connector to the pumpout port on the transfer line. After pumping out the hose I pulled out the port plug to check the pressure: 340 μbar. Pumped it down to 10 μbar (pumping pressure - final pressure probably a little higher). Pushed the plug back in, then let air into the hose before disengaging the connector, to make sure I didn't pull it back out. |
| 1345 | Fill LN2 cold trap bath. |
| 1442 | Begin LHe transfer @ MB = 27.8% (not sure actually, reset it after transfer started and forgot to note the value) |
| Transfer line doesn't seem to get frosty so I guess the pumpout worked. | |
| 1517 | End LHe transfer @ MB = 92.9% |