| 1000 | Mixing Chamber Temperature: 79.5K. External pressure sensor for IVC: 5.4E-7mbar. All exchange gas pumped out. Fill LN2 cold trap full. Leak checker on and warming up. |
| 1035 | IVC He Background Leak Rate at 3.5E-8 mbarL/s. Open V5a, V2a, V4a, and V1a to commence LN2 blowout. |
| 1125 | While blowing out, open Gate and Condenser Line Speedivalve to perform a throughput test. Current IVC Leak Rate at 2.1E-8 mbarL/s. |
| 1130 | Open V3, V14, and V9 and wait for G1/G2 to stabilize. Then close V3, V14, and open V1. |
| | Throughput rate of 51mbar/min. Last run we got 33mbar/min so this looks pretty good. No change in leak rate. Pump mixture back to dump. Realize that He3 pump isn't on. I don't think this affects throughput, but to be sure I'll run it one more time. Turn on He3 Pump and pump to dump. |
| 1140 | G3 drops dramatically indicating blowout is finished. Close V5a, V2a, V4a, and V1a, as well as vent speedivalve. Ending leak rate at 2.4E-8 mbarL/s. Looks good! |
| 1145 | Remove LN2 transfer hose from transfer stick and plug top of stick. Turn on He4 pump and pump out Main Bath. |
| 1150 | While pumping out main bath, prepare for another throughput test. All mixture in dump with V9 open and G2 reading 782mbar. P1 reads 18ubar. Open V14 and V3 to commence throughput test. G1 stabilizes at ~700mbar. Close V3, V14, and open V1. G1 drops to ~70mbar before rising at a throughput rate of 55mbar/min. Leak rate remained at 2.2E-8 mbarL/s during the test. Still looks good. Pump mixture back to dump. |
| | Switch back to turbopumping on IVC. |
| 1205 | Close Gate and Condenser Line Speedivalve and isolate mixture in Dump. G2 reads 786mbar. Turn off He3 pump. |
| 1235 | Perform 77K Electrical Check. Everything looks good. |
| 1240 | Isolate turbopump. Add 4.6E-2mbar of He exchange gas to IVC. |
| 1245 | Isolate He4 pump. Flush Main Bath with He gas. Evacuate 1K Pot. Isolate and turn off He4 pump. |
| 1250 | Remove LN2 Transfer Stick and replace with LHe transfer stick. |
| 1300 | Commence First LHe transfer (-1.0%). |
| 1305 | Turn on He3 pump and commence cryocleaning mixture through Cold Trap 2. |
| 1405 | MC/Sorb = 75K/103K. IVC = 1.9E-2mbar. |
| 1415 | MC/Sorb = 70K/83K. IVC = 1.0E-2mbar. |
| 1428 | MC/Sorb = 64K/55K. IVC = 7.4E-3mbar. |
| 1437 | MC/Sorb = 60K/32K. IVC = 7.4E-3mbar. |
| 1448 | MC/Sorb = 55K/7.3K. IVC = 6.3E-3mbar. |
| 1505 | Cease cryocleaning and pump mixture to dump. |
| | MC/Sorb = 48K/7.7K. IVC = 6.3E-3mbar. |
| 1516 | MC/Sorb = 44K/6.4K. IVC = 5.4E-3mbar. |
| 1527 | MC/Sorb = 39K/6.1K. IVC = 1.4E-3mbar. |
| 1537 | MC/Sorb = 35K/5.9K. IVC = 1.2E-3mbar. |
| 1547 | MC/Sorb = 30K/5.8K. IVC = 1.0E-3mbar. |
| 1557 | MC/Sorb = 25K/5.7K. IVC = 8.6E-4mbar. |
| 1600 | Cease LHe transfer (80.4%). |
| 1603 | MC/Sorb = 22K/5.7K. IVC = 1.0E-3mbar. |
| 1610 | Remove both LN2 cold traps from bath and allow to warm to room temperature for cleaning. Open V11A/B, V7, V2A, and V5A to measure amount of dirt on P2. |
| 1620 | MC/Sorb = 15K/5.5K. IVC = 6.3E-4mbar. Tower temperature = 18.3K. |
| 1640 | MC/Tower = 12.5K/16.4K. IVC = 5.4E-4mbar. Commence turbopumping out He transfer gas. Pressure drops to 2.5E-5mbar and continues dropping. |
| | P2 has collected 45mbar of dirt from both cold traps. Turn on He4 pump and open manual valve to commence pumping out cold traps overnight. |
| 1645 | Place Cf source inside shield near detector for overnight activation. |