| 1030 | Disconnect He3 pump from LN2 cold trap 1 and examine intake line of pump. No oil found. |
| 1100 | Connect scroll pump to He4 Rotary pumping lines and pump out cold trap 2 and fridge lines. P1 drops to from .4mbar to .2mbar. |
| 1115 | Add He gas to IGH lines through cold trap 2 until G1=562mbar, then close V3 and open V1 to perform throughput test; G1 drops to 61 mbar before beginning to rise. Throughput rate of 39mbar/min found. No change in leak rate from initial 9.6E-8 mbarL/s background rate. Pump out fridge lines with scroll pump. |
| 1310 | Current background leak rate at 7.9E-8 mbarL/s and P1=45 ubar. Opening cold trap 2 to fridge lines in preparation for throughput test results in P1 rising to 0.55 mbar. |
| 1320 | Add He gas to IGH lines through cold trap 2 until G1=580 mbar, then close V3 and open V1 to perform throughput test; G1 drops to 51 mbar before beginning to rise. Throughput rate of 42mbar/min found. No change in background leak rate (currently at 7.5E-8 mbarL/s). Pump out fridge lines with scroll pump. |
| 1350 | Add He gas to IGH lines through cold trap 2 until G1=605 mbar, then close V3 and open V1 to perform throughput test; G1 drops to 41 mbar before beginning to rise. Throughput rate of 12mbar/min found. It is unknown why the flow rate dropped from the previous test. No change in background leak rate (currently at 7.2E-8 mbarL/s). Pump out fridge lines with scroll pump. |
| 1425 | Add He gas to IGH lines through cold trap 2 until G1=636 mbar, then close V3 and open V1 to perform throughput test; G1 drops to 35 mbar before beginning to rise. Throughput rate of 8mbar/min found. A slight rise (not spike) in leak rate from background rate of 7.2E-8 mbarL/s to 1.4 E-7 mbarL/s was seen. Pump out fridge lines with scroll pump. |
| 1457 | Add He gas to IGH lines through cold trap 2 until G1=576 mbar, then close V3 and open V1 to perform throughput test; G1 drops to 31 mbar before beginning to rise. Throughput rate of 8mbar/min found. No change in background leak rate (currently at 6.6E-8 mbarL/s). Pump out fridge lines with scroll pump. |
| 1510 | Commence LN2 blowout with background rate of 6.5E-8 mbarL/s. |
| 1650 | Stop LN2 blowout, leak rate rose steadily to 9.3E-8 mbarL/s. No indication of a leak. |
| 1730 | Pump and flush main bath. No sign of leak. Pump of 1K Pot. Attach external pressure sensor to turbo pump/IVC bellows. |
| 1735 | With external pressure sensor reading 7.4E-3 mbar, add exchange gas to IVC until pressure sensor reads 4.0E-2 mbar. Open closest He recovery line. |
| 1810 | Commence LHe transfer (-1.0%). |
| 1855 | Cease helium transfer. Helium liquid level 91.3%. Mixing chamber temperature 73.7 K and falling. |
| 2255 | Mixing chamber temperature 6.8 K. Open line to turbo pump. Evacuate IVC overnight. |