| 0030 | Base temperature 230 mK and falling slowly. Tightening the connection on the helium trap worked for some unknown reason. Going home. |
| 1015 | Fill N2 cold trap full. |
| | G2 pressure is a little high at over 200 mbar, but tower temperature is much lower than last night: 165 mK. Keep an eye on the pressure. |
| 1215 | Pressure in G2 still over 200 mbar. Having trouble condensing, although base temperature is stable. Wonder how long this will last… |
| 1255 | Pressue in G2 approaching 300 mbar. Pressure in G1 also high indicating a blockage in the pipe. I want to clean cold trap 2. Open valve 13A to cool charcoal in cold trap 1. Open valve 12A to circulate mixture through cold trap 1. Leave valves to and from cold trap 2 open for now. |
| 1400 | Cleaning cold traps will have no effect as there is a blockage in the pipe. Leave both cold traps open as run will finish tomorrow. Hope for the best. |
| 1600 | Flash G8 for 1 hour: LED1; current 500 uA; flash duration 100 us; flash-off time 2.56 ms. Tower temperature peaks at 260 mK. |
| 1800 | Data series 07110201_1729 taken: G8 only; charge only as TESs too warm for phonons. |
| | Flash both detectors overnight. Take more data tomorrow (as long as fridge behaves… G1 & G2 are at 267 mbar and 230 mbar respectively, and pressure in 1 K pot exhaust is 40 mbar). |
| 2100 | Fill N2 cold trap full. |
| 2100 | Fill N2 cold trap full. |