| | Status: Warming up from 77K because leak from bath to IVC discovered. Nitrogen in cryostat vacuum jacket. Mixture cleaned several times. |
| 0620 | MC(Cernox) = 216.3 K |
| 0820 | MC(Cernox) = 226.8 K |
| 0920 | MC(Cernox) = 231.1 K |
| 0940 | Start pumping out IVC. We'll repeat yesterday's leak tests. |
| 0945 | MC(Cernox) = 232.5 K, Sorb = >249.9 K (max), Cryostat outer surface = 21.8 C |
| 0950 | Check pressure in warm LN2 Trap 1: 14.7 mbar. Pump out with scroll pump. |
| 1105 | Start pumping IVC with leak detector. Background around 1000 pbarL/s. |
| 1110 | Raise LN2 transfer tube 1 inch and squirt a blast of He down the tube. Leak around 970 pbarL/s, no increase. |
| 1115 | Push LN2 transfer tube all the way down and squirt a blast of He down the tube. Leak around 960 pbarL/s, no increase. |
| 1124 | Electrical check at 230 K. As yesterday, all channels look good and stable, but the cross-channel resistances don't follow the expected pattern. |
| 1135 | Let about 0.76 bar N2 gas into IVC |
| 1150 | Start cryocleaning mixture through cold LN2 Trap 2, V6 = 12.4% |
| 1200 | Increase V6 → 12.9% to restart flow |
| 1205 | MC(Cernox) = 235.8 K, Cryostat outer surface = 22.0 C |
| 1205 | Increase V6 → 13.0% to speed up flow |
| 1300 | Stop cryocleaning, 70 minutes through Trap 2. Pump to dump. |
| 1435 | Start cryocleaning mixture through cold LN2 Trap 1, V6 = 12.9% |
| 1440 | MC(Cernox) = 245.2 K, Cryostat outer surface = 21.8 C |
| 1445 | Increase V6 → 13.1% to restart and speed up flow |
| 1520 | MC(Cernox) = 247.2 K, Cryostat outer surface = 21.8 C |
| 1525 | Increase V6 → 13.5% to speed up flow |
| 1550 | Stop cryocleaning, 75 minutes through Trap 1. Pump to dump. |
| 1640 | MC(Cernox) = 251.2 K, Cryostat outer surface = 22.0 C |
| 1640 | Check pressure in warm LN2 Trap 2: 4.2 mbar. Pump out with scroll pump. |
| 1744 | Begin to pump out vacuum jacket with scroll pump. MC(Cernox) = 254.1 K |
| 1758 | Switch to turbo pump on vacuum jacket. MC(Cernox) = 254.6 K |