| 0020 | Mixing chamber temperature stable at 413 mK for around 20 minutes. Then increased to 415 mK. Resistances of still, cold plate and RuOx thermometers 4.76 kΩ, 6.09 kΩ & 7.34 kΩ respectively. Temperatures of still, cold plate and RuOx thermometers are 1.01 K, 623 mK & 468 mK (+/- 1 mK each) respectively. Pressure in G2 has been oscillating between 136 mbar and 145 mbar. Leave overnight to see if there are any changes in the morning. |
| 0140 | Mixing chamber temperature has been gradually rising over the past hour, and has reached 418 mK. G2 pressure 143 mbar. P1 pressure has been stable at 280 μbar over this period. |
| 0930 | With G1=133 mbar, G2=131 mbar, P1=0.28 mbar and a 1K Pot temperature of 1.76 K, mixing chamber has been somewhat stable at 423 mK for most of the night. Resistances of still, cold plate and RuOx thermometers are 4755 Ω, 6049 Ω & 7266 Ω respectively. Temperatures of still, cold plate and RuOx thermometers are 1.012 K, 631 mK & 476 mK respectively. Fill LN2 cold trap full. |
| 1215 | Mixing chamber temperature t 424 mK, G1 and G2 around ~140 mbar. Open V14 and pump remaining mixture from the dump. Mixing chamber temperature starts to rise, but G1 and G2 pressures lower. |
| 1250 | G1=140 mbar, G2=135 mbar, P1=0.6 mbar. Close V14 and P1 drops to 0.28 mbar, and mixing chamber temperature is still dropping at a similar rate. |
| 1500 | With mixing chamber temperature stable at 424 mK, G1=147 mbar, G2=143 mbar, P1=0.28 mbar and the 1K Pot set to 1.76 K, close V13A and open V9 to put some mixture (hopefully mostly He-3) back in the dump. Right after the procedure was started, the mixing chamber temperature began to rise, suggesting that the phase transition was moving up the condenser line. 31 mbar worth of mixture was extracted before V9 was closed and V13A was reopened. |
| 1510 | The mixing chamber temperature reached a maximum of 510 mK and is now quickly decreasing. |
| 1530 | After some oscillations, the mixing chamber temperature has reached a somewhat stable point at 435 mbar, with some very small oscillations. |
| 1607 | Mixing chamber temperature at 432 mK and stable, P1=0.28 mbar, G1=146 mbar, and G2=141 mbar. Resistances of still, cold plate and RuOx thermometers 4.704 kΩ, 5.988 kΩ & 7.150 kΩ respectively. Temperatures of still, cold plate and RuOx thermometers are 1.04 K, 643 mK & 489 mK respectively. |
| 1616 | Mixing chamber temperature still stable at 433 mK. Close V13A and open V9 to put more mixture into the dump. Once the procedure was started the temperature dropped to 432.5 mK but then started to rise and oscillate. 45 mbar worth of mixture total now in dump. Close V9 and reopen V13A. |
| 1705 | Mixing chamber temperature has stabilized ~470±2mK. G1: 141mbar, G2: 135mbar, P1: 0.26mbar. Checking the other thermometers: Still: 1.074K (4635kΩ), Cold Plate: 0.7001 (5729kΩ), RuOx: 537mK (6771kΩ). When switching back to usual mixing chamber thermometer, temperature still oscillating around ~470mK. Pull out more mixture for a total of 60 mbar in the dump. |
| 1725 | Mixing chamber reached a maximum of 760 mK and is now dropping. |
| 1808 | Mixing chamber temperature has is at ~741±3mK and is rising at a rate of 14 mK/hour with small oscillations also occurring. G1: 144mbar, G2: 137mbar, P1: 0.26mbar. Checking the other thermometers: Still: 1.06K, Cold Plate: 0.681 (5810kΩ), RuOx: 891mK (5210kΩ) and also oscillating. Open V14 to add dump mixture back into fridge lines. |
| 1840 | P1=0.7 mbar, G1=132 mbar, G2=127 mbar, 1K Pot temperature at 1.767 K, and mixing chamber temperature at 424 mK and dropping towards the previous equilibrium point at 423 mK. Close V14. |
| 1850 | G1=132 mbar, G2=126 mbar, P1=0.28 mbar, 1K Pot at 1.767 K. After switching back to the H35 mixing chamber temperature (still stable at 423), reduce the 1K Pot slightly. Initially the 1K Pot temperature drops as the mixing chamber temperature begins to rise. |
| | After first initial minutes, P1 has dropped to 0.22 mbar, G1=115 mbar, G2=112 mbar, 1K Pot at 1.679 and is rising/oscillating. |
| 1901 | 1K Pot has seemingly settled to 1.588 K and the mixing chamber is at 487 mK and rising at a rate of 7.6 mbar/min. G1=92 mbar, G2=89 mbar, and P1=0.2 mbar. |
| 1906 | 1K Pot has risen to 1.608 K and is now dropping. |
| 1908 | 1K Pot is again seemingly stable at 1.604 K. |
| 1935 | Mixing chamber plateaus at 543 mK and is now oscillating.G1=97 mbar, G2=94 mbar, P1=0.22 mbar, 1K Pot temperature at 1.605 K. |
