| | Overnight status: bath full of LN2, He exchange gas in IVC. MC fell to 80 K at about 20:30. Cryocleaning mixture overnight. |
| 0905 | MC = 77.4 K, increasing at about 0.01 K/hour. Sorb reading 127 K, increasing at about 0.5 K/hour. IVC = 1.4 mbar. |
| 0910 | Pump out IVC with leak detector. LD doesn't like that pure He much - close LD valve, vent and pump a few times. Begin pumping out IVC with turbo pump. |
| 0922 | Fill LN2 cold trap Dewar |
| 0940 | IVC pumping = 1.9e-6 mbar, IVC = 2.2e-5 mbar |
| 1115 | IVC pumping = 1.2e-6 mbar, IVC = 1.4e-5 mbar. |
| 1120 | Leak detector on IVC with turbo valved out, signal = 180 pbarL/s, slow upward creep. Start blowing LN2 out of bath with He gas. |
| 1205 | LD signal steadily dropping, now 100 pbarL/s. |
| 1220 | Cease cryocleaning and pump to dump. |
| 1300 | Perform LN temperature electrical check, all looks normal. |
| 1305 | After pumping mix to dump G2 reads 792 mbar. |
| 1311 | Conduct a throughput test , and get a throughput rate of 60 mbar/min in G1. (G1 allowed to rise to about 624 mbar and fell to minimum of 201 mbar.) Background leak rate remained unchanged from 100 pbarL/s during test, indicating no leak. Pump mixture back to dump. Switch from leak checker to turbo pump on IVC. |
| 1342 | Flush main bath with He gas. Leak rate continues to slightly decrease, currently at 91 pbarL/s. |
| 1355 | Commence LHe transfer (-1.0%). |
| 1410 | Cease pumping on IVC. Pressure w/o pumping is 5.4E-6mbar. Add 4.6E-2mbar of He exchange gas. Isolate IVC Leave IVC open to gauge. |
| 1500 | MC = 70 K, Sorb = 102 K, IVC = 3.4e-2 mbar. |
| 1535 | Sorb flatlines at 19.9 K |
| 1600 | MC = 41 K, Sorb = 19.0 K, IVC = 1.6e-2 mbar. Still = 22 K, Cold plate = 34 K, Tower = 44 K. |
| 1630 | MC = 27 K, Sorb = 7 K, IVC = 1.0e-2 mbar. 1K Pot = 5.8 K, Tower = 28 K. |
| 1640 | Main bath reading 4.8% |
| 1630 | MC = 16 K, Sorb = 5.5 K, IVC = 6.3e-3 mbar. 1K Pot = 4.6 K, Main bath 23.4%. |
| 1700 | MC = 12.5 K, Sorb = 5.4 K, IVC = 6.3e-3 mbar. 1K Pot = 4.5 K, Main bath 75.5%. |
| 1707 | Tower 14.2 K |
| 1710 | End LHe transfer (92.1%.). Tower has reached 11K, so with IVC pressure at 1.4E-3 mbar, commence pumping on IVC with turbo pump overnight. |
| 1720 | Sorb = 5.8 K, 1K Pot = 4.9 K, Still = 5.3 K, Cold plate = 8.3 K, Tower = 10.6 K, MC(Cernox) = 9.8 K, MC(H35) = 9.5 K, IVC pumping = 3.4e-6 mbar |
| 1738 | Fill LN2 cold trap full. |