| 1140 | Begin leak check. Background leak rate of 1.5E-9 mbar*L/s. |
| | Jumpy leak rate on T-flange closest to IVC. Could be an acceptable small air leak. |
| | Background has risen to 1.8E-8 mbar*L/s. Continued pumping to allow rate to calm down before checking indium seals. |
| 1600 | Continue leak checking of indium seals. Background leak rate of 1.3E-8 mbar*L/s. |
| | No leak found, and background rate slowly decreased to 1.0E-8 mbar*L/s. |
| | Retested suspicious T-flange. No rise in leak rate. |
| 1830 | Raised and evacuated dewar. |
| 1845 | Added Helium to Main Bath. Leak rate rose from 1.2E-8 mbar*L/s to 5.5E-8 mbar*L/s then declined steadily. Suspected differential leak, but not as large as last time. Will continue with cool down to see if it persists at cold temperatures. |
| | Isolated leak checker. Recommence pumping IVC overnight with turbo pump. |
| | Evacuated Main Bath. |