| | Found leak into IVC at 77K yesterday. Warming to room temp. |
| 0929 | MC(Cernox) = 218.2 K, Sorb = >249.9 K |
| | At current warming rate should hit 273 K at about 3:10 am. At 6:00 pm it will reach 253 K. If we pump out the cryostat vacuum jacket at that time it probably won't reach 273 K in the morning - experience suggests it only goes up about +10 K overnight if the vacuum jacket is pumped out. It will reach 263 K by about 10pm, so that would be a good time to pump out. |
| 1200 | MC(Cernox) = 231.4 K |
| 1210 | Start blowing on main bath with heat gun, see if that speeds up the warmup |
| 1300 | MC(Cernox) = 235.6 K |
| 1325 | Move the heat gun to blow on bottom of main bath - previously had it on ladder blowing at a point above the mu-metal shield |
| 1400 | MC(Cernox) = 239.5 K |
| 1500 | MC(Cernox) = 243.4 K |
| | It seems to be warming a little more quickly. Warming time constant has fallen from 14 hours to 13 hours |
| 1600 | MC(Cernox) = 247.2 K |
| 1700 | MC(Cernox) = 251.0 K |
| | warming time constant down to 12 hours |
| 1740 | Turn off heat gun. Bottom of bath is quite warm. |
| | looks like MC will hit 263 K around 9:30 pm, could pump out the cryostat vacuum jacket then or later, should be warm in the morning. |
| 2152 | Open valve to cryostat vacuum jacket. Vacuum manifold reads 12 mbar. Turn on scroll pump, open valve. |
| 2154 | MC (Cernox) = 267.0 K |
| 2210 | Begin turbo pumping, close scroll pump valve and turn off. |
| 2211 | MC (Cernox) = 267.6 K K |