| 1430 | Mixing chamber temperature 77 K. Pump out N2 exchange gas. |
| | Fill N2 cold trap full. |
| 1955 | IVC pressure 2E-6 torr: good enough. Isolate turbo pump. Background helium leak rate 3E-9 mbar l/s: lower than yesterday. Start blowing out liquid nitrogen. |
| 2030 | Interrupt cryocleaning. Pump mixture into dump in preparation for throughput test. |
| 2110 | Nitrogen has been blown out. Helium leak rate remained unchanged at 3E-9 mbar l/s. Left helium running for 5 minutes and leak rate increased to 1E-8 mbar l/s. There may be a leak, but it is very small. Helium leak rate increased to 2E-8 mbar l/s when pumping on the main bath. Not sure if this is coincidence, but increase is relatively small, so it is probably safe to say there is no gross leak. |
| 2215 | Throughput test yields 45 mbar/min. Helium leak rate 3E-8 mbar l/s: rate has been rising steadily, so no gross leak. |
| | Evacuate 1 K pot. |
| 2245 | Flush main bath. Helium leak rate 3E-8 mbar l/s. |
| | Fill IVC with 0.25 mbar He-4 exchange gas. Commence helium transfer. |