| 1030 | Turn on mixing chamber heater. Mixing chamber temperature at 27.6 K, Sorb temperature is at 55.2 K, and both are now rising. G1=0.8 mbar, P1=150 ubar, G2=678 mbar and falling after opening V9. All other valves are closed. |
| 1221 | Mixing chamber temperature at 40.3 K and Sorb temperature at 75.5 K, G1=1.5 mbar, G2=676 mbar, and P1=6 ubar. Perform throughput test with mixture, where mixture passes through cold trap 1 and V1 is opened once G1 is stable (changes are less than 1 mbar). When G1=557 mbar V1 is opened, with G1 dropping to 115 mbar before rising. Throughput test gives a flow rate of 72 mbar/min. Pump mixture back to dump. |
| 1239 | Commence long He transfer (-1.0%). |
| 1245 | Add 5.4E-2 mbar He exchange gas to IVC. Mixing chamber temperature at 45 K and Sorb temperature at 79 K. Perform throughput test with mixture, where mixture passes through cold trap 1 and V1 is opened once G1 is stable (changes are less than 1 mbar). When G1=552 mbar V1 is opened, with G1 dropping to 105 mbar before rising. Throughput test gives a flow rate of 75 mbar/min. Pump mixture back to dump. |
| 1534 | Hannah tried to fix her shoe with super bonder 409. Close gate and condenser line valves. Plug in mixing chamber heater for a moment to not that the sorb is at 82 K. Unplug thermometer. |
| 1524 | Currently mixing chamber temperature is at 47 K and Sorb temperature is at 56.5 K (unplug after checking temperature). |
| 1817 | Sorb temperature at 26 K, mixing chamber temperature at 41 K. Normally a slow transfer would be going much faster than this. Is something wrong? |
| 2020 | Mixing chamber is cooling at a faster rate now, though it is still much slower than expected. Currently mixing chamber is at 30 K and the Sorb is at 13 K. |
| 2120 | Although the mixing chamber temperature is at 24 K, the Sorb temperature is at 12 K. To avoid the rest of the IVC reaching below 10K before the mixing chamber (and because it is already getting late), we have decided to start pumping out the exchange gas now. |