2022/08/20 (Saturday)
- Lab in-personnel: Giulia
| Status | Run 76 in progress |
|---|---|
| Setup | Cables 2/3/1 → diverter/nothing/nothing → Side2-readout HV CONN 1/3/2 → HV 1(L)/2(R) → DCRC50(3)/DCRC55(1), DCRC33(2)→HV control, NaI trigger signal → DCRCX(4) Lead/poly shield fully assembled. Boron-filled socks covering NaI detectors. PuBe behind lead wall on West side of lead/poly shield. |
| Suspended circulation yesterday and stopped the 1K Pot. Pumping out the IVC overnight with fridge >4K | |
| 1330 | MC/Coldplate = 475/752 mK, Still = 5.68 K / off-scale mbar / 0 mW, G1/G2 = 611/556 mbar, 1K Pot = closed / 1.62 K / 19±1 mbar, MB = 73.4 % |
| no - several errors in above readings, particularly MC, Coldplate, 1K Pot | |
| 1342 | Fill LN2 cold trap bath |
| 1345 | Turbo on IVC = 1.4 nbar. With Turbo valved out for 1 minute, IVC = 12 nbar. Leave valve closed for now. |
| 1400 | Check pressure in 1K Pot by closing 4He pump valve and opening 1K Pot speedivalve. Mechanical gauge reads about 0.24 atm. |
| 1405 | IVC = 19 nbar |
| 1415 | Pump out 1K Pot in steps, keeping pressure on 4He pump low. Leave it pumping - needle valve is closed. |
| 1550 | 1Kpot/MC = 1.40/2.16 K |