| 0900 | With G1: ~1.0mbar, G2: 0mbar, P1: 80ubar, close gate and condenser line speedivalves and commence LN2 transfer. |
| 0910 | Cease scroll pumping on G2. Leave to see if pressure increases now that pump has been removed from the circuit. |
| 1115 | Turn off turbo pump in preparation for pumping on He-3 pump and He-3 intake/exhaust lines. |
| 1200 | With intake port blanked off, start pumping on He-3 pump exhaust port with scroll pump. Also start pumping on He-3 intake/exhaust lines with turbo pump through exhaust speedvalve. |
| 1210 | End LN2 transfer. |
| 1220 | P1 has risen steadily to 0.11 mbar since start of intake/exhaust line pumping. |
| 1250 | Turn on He-3 pump, while pumping on exhaust with scroll pump. |
| 1305 | P1: 18ubar, G2: 0mbar, external pressure sensor: 7.4E-5mbar. Fridge temperature at 85K. Close V6. Isolate connected inlet/exhaust lines from turbopump. Wait to see if G2 rises. |
| 1340 | Commence pumping on He3 pump with turbopump. Connect scroll pump to He4 pumping lines and pump out He gas line in order to add He gas to system for throughput test. |
| 1450 | Mixing chamber temperature at 79.5K, pump out exchange gas with scroll pump and leak checker. |
| 1500 | With P1 at 20ubar, open gate and condesner line speedivalve. Add 663mbar worth of He gas to G1. Open V1 to let gas into fridge lines while monitoring P1. |
| 1535 | G1=87 mbar, P1=26 ubar, suggesting some flow through the fridge lines. Close V1 and add more He gas until G1=561 mbar. Open V1. |
| 1550 | P1= 36 ubar, G1= 158 mbar and G2=0 mbar. Mixing chamber temperature at 79 K. Open up scroll pump to pump on P1 and fridge lines. Once V6 is mostly open, P1 rose slowly to 60 ubar. |
| 1615 | G1= 156 mbar, P1=60 ubar, G2=0 mbar, external pressure sensor at 4.6E-4 mbar, and mixing chamber temperature at 79 K. Leave for a while to go to Scott and Tommy's party. |
| 1805 | G1=141 mbar, G2=0 mbar, P1= 45 ubar and mixing chamber temperature at 78 K. Open V5 to pump from both sides and P1 rose to 2.2 mbar. Switch setup to pump through vent, V7, V2, V1, and V3 with scroll pump to get from both sides. |
| 1931 | Close all valves on IGH and turn off He-3 pump. Disconnect turbo pump from He-3 intake/exhaust lines and disconnect scroll pump from He-3 pump. Lower dewar. Add 0.63 mbar N2 exchange gas to IVC to aid in warmup. Isolate IVC and move turbo/scroll pump setup to pump room to continue pumping on fridge lines through vent, V7, V2, V1. Initially pump on lines with scroll pump until G1=0 mbar, G2=0 mbar, and P1=0.24 mbar. Switch to turbo pump. |
| 1950 | Leave for break. Currently He-3 pump is removed from system and blanked off at both intake and exhaust ports. He-3 pump intake and exhaust lines are connected, with G2=0 mbar. Turbo pump is pumping on fridge lines through V2A, V5A, V7, V2, V1, condenser line speedivalve and gate valve open. All other valves on IGH are closed, with P1= 0.12 mbar and G1= 0.3 mbar. Dewar has been lowered and fridge is warming up with 0.63 mbar N2 exchange gas in IVC. Current fridge temperature is 94 K. LN2 cold trap speedivalves are closed and cold traps are at room temperature. |