2017/01/17 (Tuesday)

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	Status: Main bath raised, IVC turbo pumping. Small leak at top of stripline tube. Main bath vacuum jacket is evacuated. 1K Pot needle valve closed. LN2 traps clean. Mixture is in dump, fridge evacuated. Room temperature.
1100	Turbo pump = 8.6 nbar, IVC = 0.46 μbar
	Preparing to transfer LN2
1130	Begin leak detector on IVC. Starts around 50 pbarL/s but it's falling. Falls to 2.0 pbarL/s in a couple of minutes.
1135	Pump out main bath with scroll pump. (Before pumping out bath we double checked that the 1K Pot was empty - it wasn't entirely. Pumped out about 3 mbar from pot.) Pumps down to below 1 mbar on P2 in less than 5 minutes.
1145	Pressurize MB with He gas. Leak detector signal rises to 15 pbarL/s.
1155	Let 4.6 mbar He exchange gas into IVC
1205	Begin transferring LN2 to main bath MC(Cernox) = 300 K, Sorb = >249 K (max), IVC = 4.6 mbar.
1220	MC(Cernox) beginning to fall, 297 K
1305	MC(Cernox) = 240 K, Sorb = >249 K (max), IVC = 4.0 mbar. Level resistor = 1.05 kΩ
1305	LN2 storage Dewar is empty, need to refill it. Pause transfer.
1410	MC(Cernox) = 205 K, Sorb = >249 K (max), IVC = 3.0 mbar. Level resistor = 1.05 kΩ
1410	Re-start LN2 transfer
1420	MC(Cernox) = 200 K, Sorb = >249 K (max), IVC = 3.0 mbar. Level resistor = 1.12 kΩ
1455	MC(Cernox) = 170 K, Sorb = >249 K (max), IVC = 2.2 mbar. Level resistor = 1.20 kΩ. Getting frosty at top of fridge, plume of condensation coming out of the port.
1505	MC(Cernox) = 160 K, Sorb = 247 K, IVC = 1.9 mbar. Level resistor = 1.23 kΩ.
1520	MC(Cernox) = 140 K, Sorb = 221 K, IVC = 1.9 mbar. Level resistor = 1.28 kΩ.
1530	MC(Cernox) = 130 K, Sorb = 197 K, IVC = 1.6 mbar. Level resistor = 1.31 kΩ.
1540	MC(Cernox) = 150 K, Sorb = 178 K, IVC = 1.6 mbar. Level resistor = 1.326 kΩ. Close to finished.
1550	MC(Cernox) = 116 K, Sorb = 167 K, IVC = 1.6 mbar. Level resistor = 1.330 kΩ. Close to finished.
1555	MC(Cernox) = 112 K, Sorb = 157 K, IVC = 1.6 mbar. Level resistor = 1.330 kΩ. Stop LN2 transfer
1630	MC(Cernox) = 96 K, Sorb = 136 K, IVC = 1.4 mbar.
1702	MC(Cernox) = 90 K, Sorb = 131 K, IVC = 1.4 mbar. Time to go so commence pumping out IVC with scroll pump.
1705	MC(Cernox) = 89 K, Sorb = 131 K, IVC = 6.3e-2 mbar. Switch to pumping on IVC with turbopump.

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