2022/10/18 (Tuesday)
- Lab in-personnel: Zach, Himangshu
| 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 source behind lead wall on West side of lead/poly shield. |
| NaI trigger window: 7.6-11.2 MeV | |
| Cooled to base two days ago after fourteenth 5K pumpout. | |
| 1025 | Close 1K Pot needle valve |
| 1030 | Open V3 to let mixture from Condenser side into Still side. |
| 1035 | MC = 1.01 K |
| 1035 | Turn on Still and MC heaters to 20 mW each |
| 1035 | Turn off DAQ programs and unplug DCRCs 1&3 |
| 1040 | Close 1K Pot speedivalve, V4a, 4He pump inlet valve. Turn off 4He pump. Close recovery valve to 4He pump outlet. NOTE: remember to open recovery valve when the pump is turned back on. |
| 1124 | MC/1KPot = 3.82/3.72 |
| 1124 | G1(fridge) = 722 mbar. Open V9 to release mixture into dump |
| 1205 | MC temp starts to rise more quickly |
| 1245 | MC/1KPot = 6.03/4.37. Temperatures are relatively flat now. |
| 1245 | Check pressure in IVC: 0.086 ubar. Start pumping out IVC with turbo pump |
| 1424 | MC = 10.4 Turn off MC and Still heaters |
| 1444 | Filled LN2 cold trap bath |