| | Status: pumped out IVC overnight. One cryocleaning done, mixture exposed to cold LN2 Trap 1 overnight. 1K Pot evacuated and isolated. Cryostat vacuum jacket pumped out. |
| 0925 | Turbo (on IVC) = 25 nbar, IVC = 460 nbar with pump valved out. |
| 0935 | warm LN2 Trap 2 = 8.1 mbar. Pump out with scroll pump. |
| 0945 | Pump mixture out of cold LN2 Trap 1 to dump |
| 1005 | Begin cryocleaning mixture through cold LN2 Trap 2, V6 = 12.8% |
| 1005 | Attach Leak Detector to IVC. Background settles at 22 pbarL/s |
| 1010 | Pump out main bath with scroll pump |
| 1020 | Increase V6 → 12.9% to reestablish flow |
| 1020 | Pressurize Main Bath with helium gas to 345 mbar above 1 atm on G3. LD signal increases to 65 pbarL/s. Worse than last time, oh well guess we'll see how it goes at 77K. |
| 1025 | Increase V6 → 13.0% to reestablish flow |
| 1030 | Pump out 1K Pot with scroll pump |
| 1035 | Let 5.4 mbar He exchange gas into IVC |
| 1045 | Begin LN2 transfer |
| 1045 | MC(Cernox) = 291.5 K, Sorb = >249 K (max), IVC = 5.4 mbar, Level resistor = 1.005 kΩ. |
| 1050 | MC(Cernox) = 290.7 K, Sorb = >249 K (max), IVC = 5.4 mbar, Level resistor = 1.054 kΩ. |
| 1055 | Open Condenser valve. This exposes the fridge vacuum to the LHe cold trap, so it may help freeze out any air that's in the fridge volume. (unlike recent runs we are not leaving the mixture in the fridge during the LN2 transfer.) |
| 1105 | MC(Cernox) = 279.3 K, Sorb = >249 K (max), IVC = 4.6 mbar, Level resistor = 1.107 kΩ. |
| 1115 | Stop cryocleaning mixture, pump mixture back to dump |
| 1130 | MC(Cernox) = 232.9 K, Sorb = >249 K (max), IVC = 3.0 mbar, Level resistor = 1.226 kΩ. |
| 1130 | warm LN2 Trap 1 = 7.5 mbar. This is the one that the mixture was exposed to overnight. Pump out with scroll pump. |
| 1145 | MC(Cernox) = 197.7 K, Sorb = >249 K (max), IVC = 2.5 mbar, Level resistor = 1.292 kΩ. |
| 1205 | MC(Cernox) = 164.3 K, Sorb = 201.3 K, IVC = 2.2 mbar, Level resistor = 1.322 kΩ. |
| 1205 | Begin cryocleaning mixture through cold LN2 Trap 1, V6 = 12.7% |
| 1215 | Increase V6 → 13.0% to reestablish flow |
| 1220 | MC(Cernox) = 146.1 K, Sorb = 167.5 K, IVC = 2.2 mbar, Level resistor = 1.335 kΩ. |
| 1225 | Increase V6 → 13.1% to speed up flow |
| 1240 | MC(Cernox) = 130.5 K, Sorb = 142.0 K, IVC = 1.9 mbar, Level resistor = 1.337 kΩ. |
| 1300 | MC(Cernox) = 117.9 K, Sorb = 128.3 K, IVC = 1.9 mbar, Level resistor = 1.339 kΩ. |
| 1315 | MC(Cernox) = 109.8 K, Sorb = 123.7 K, IVC = 1.9 mbar, Level resistor = 1.339 kΩ. |
| 1315 | Stop cryocleaning mixture, pump mixture back to dump |
| 1330 | MC(Cernox) = 104.1 K, Sorb = 121.3 K, IVC = 1.9 mbar, Level resistor = 1.340 kΩ.
Stop LN2 transfer |
| 1335 | warm LN2 Trap 2 = 8.9 mbar. Pump out with scroll pump. |
| 1405 | Fill LN2 cold trap bath |
| 1405 | MC(Cernox) = 93.9 K, Sorb = 119.4 K, IVC = 1.9 mbar |
| 1420 | Begin cryocleaning mixture through cold LN2 Trap 2, V6 = 13.1% |
| 1430 | Increase V6 → 13.3% to reestablish flow |
| 1505 | MC(Cernox) = 84.1 K, Sorb = 118.6 K, IVC = 1.9 mbar |
| 1505 | Increase V6 → 13.4% to reestablish flow |
| 1530 | Stop cryocleaning mixture, pump mixture back to dump |
| 1530 | MC(Cernox) = 82.1 K, Sorb = 118.5 K, IVC = 1.9 mbar |
| 1535 | Electrical check on DIBs 1&2. Both look A-OK. |
| 1545 | warm LN2 Trap 1 = 6.6 mbar. Pump out with scroll pump. |
| 1600 | Open mixture to cold LN2 Trap 1 (v9 and v13a open, 3He pump off). Will leave it overnight. |
| 1545 | warm LN2 Trap 2 = 4.8 mbar. Pump out with scroll pump. |