2023/11/30 (Thursday)

Status	Run 78 ending.
1300	Fridge ran out of LHe, G1>999mbar, G2~900-1000mbar
1305	Close V6, then close V13A and open V9, then begin to open V6 again and open V3
1316	Close 1K Pot needle valve
1318	Close V1 and still gate valve, to pump just on LN2 Trap 1 until it's empty.
1320	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.
1325	Isolate LN2 Trap 1 which is now pumped (P1<.1mbar) out to dump (close V12a and speedivalve)
1326	Continue pumping on the fridge lines (open Still Gate Valve and V1)
1332	MC/Still/1K Pot/Sorb = 0.98/3.2/>7/13 K

1341	Stop pumping out fridge (close V1, V3, Still Gate valve, Condenser speedivalve). G2(Dump) = 635.6 mbar

Ptrue[mbar] = Pdisplay[mbar] + ( Pbar[inHg] - 29.92 ) * 33.86

1344	MC = 1.29 K. Sorb = 14.1 K
1348	Close V6. G2 = 636.0 mbar. Corrected dump pressure = 632.95 mbar.
1348	Isolate dump (close V9) and turn off 3He pump.
1430	Add a tube length of He exchange gas to the IVC (turbo and CVJ closed). IVC = 22 ubar, MC= 5.25K
1438	Add another tube length of exchange gas. Now IVC = 40 ubar, MC = 5.31 K
1441	Add another tube length of exchange gas, now IVC = 74 ubar, MC = 5.31 K
1449	Add 1.5 more tube lengths of exchange gas, now IVC = 0.12 mbar, close IVC valves.
1455	Pump out line to CVJ
1505	Add 1 tube length of He exchange gas into the pump manifold (turbo, IVC, and CVJ closed) then let the exchange gas into the CVJ.
1506	He recovery meter starting to turn faster

Check bag level in He liquifiying room, was at around 90% with 1 pump on so turn on the 2nd pump

1507	CVJ = 0.22 mbar, MC temp rising

1644 CVJ = 0.03 mbar, recovery meter turning slowly.

1645 Add another tube length of He exchange gas directly into the CVJ, CVJ = 0.25 mbar