| 1110 | Come in to find that G2 has increased from 0 mbar to roughly 8.0 mbar. Checking the DAQ shows that this increase has been steadily occurring since about 7am this morning. G1=2.0 mbar and P1=18 ubar look normal, though that is to be expected since they are being pumped on by scroll pump. Current fridge temperature at 78 K. External pressure sensor reading He-3 pump exhaust is at 2.2E-5 mbar. |
| 1130 | Isolate He-3 pump from turbopump. External pressure sensor reads 1.2E-2 mbar. Turn off trubo pump. Lower dewar the rest of the way. Current fridge temperature at 79 K, and G2 now reads 11 mbar and is still rising. |
| 1220 | Close gate valve and condenser line speedivalve as well as all valves on IGH. |
| 1240 | Remove copper condenser line from the system and replace with He cold trap. Commence pumping on He-cold trap and IGH lines with scroll pump. |
| 1550 | G1: 1.8mbar, P1: 28ubar, G2: 8mbar, Mixing chamber temperature at 254K. External pressure sensor attached to He3 pump exhaust lines reads 2.2E-1mbar. Open gate and condenser line speedivalve to pump out fridge lines overnight to remove blockage. |
| | P1 rises to 0.16 mbar. |