| | MC dropped to <3 K and flat-ish at around midnight, with G1 dropping to 100 mbar and flat. Condensation finally. |
| 0831 | MC 2.23 K (Cernox), Tower 2.25 K, Still 1.82 K. 1K Pot 1.78 K / 45 mbar. Main bath 53%. G1/G2 89/304 mbar. |
| 0840 | fill LN trap dewar |
| 0845 | open V13a for about 40 minutes to let more mix in. Left 150 mbar in dump. |
| 0922 | finish electrical check. Compared these 2K results to 80K results: in DIB1, the shorts between Qi/Qo and the QET returns seem to have disappeared, and LED2 seems to be open now. In DIB2, the shorts across QET A (bias to return) and QET B have disappeared, but both LED1 and LED2 appear to be open now. |
| 0934 | Open V12a full. MC = 1.92 K (H35), 1.95 K (Cernox). Tower = 1.93 K. G1/G2 = 56/56 mbar (150 mbar still in dump). Still = 1.83 K. 1K Pot = 1.76 K / 38 mbar. |
| 0940 | Begin circulation |
| 0945 | V6 open to 13.2%, G1/G2 = 96/113 mbar and stabilizing, Still = 1.69 K and falling. |
| 0954 | P1 falls to 40 mbar. V6 at 13.6%, G1/G2 = 115/113 mbar and falling, Still = 1.3 K |
| | During initial circulation, Still falls to 1.10 K, then wiggles between 1.04 and 1.10 K. |
| 1018 | V6 fully open, G1/G2 = 113/120 mbar and stable. Still = 1.04 K / 0.220 mbar. 1K Pot = 1.8 K / 40 mbar. |
| 1036 | MC falls to 40 mK, Tower to 68 mK |
| 1040 | Still 1.04 K / 0.140 mbar, 1K Pot 1.76 K / 40 mbar |
| 1043 | Open V14 briefly to introduce more mix from dump, 2 times in 5 minutes. Still cools to 0.96 K during process. |
| 1050 | Open V14 and leave it open for 8 minutes. Closed V14 when P1 fell to 3.6 mbar. |
| 1101 | Still 1.04 K / 0.140 mbar, G1/G2 = 82/89 mbar, Tower 92 mK and falling. MC falls from 68 to 52 mK with +/- 5 mK oscillations |
| 1107 | Close needle valve a bit on 1K Pot, reducing to 1.69 K / 18 mbar |
| 1126 | Tower 76 mK, MC 52 mK. |
| 1230 | MC has been oscillating between 52 and 62 mK in a shark-fin pattern, about 6 minute period. Pumping pressures oscillate in sync (not surprisingly). Tower much warmer, oscillating between 73 and 77 mK. |
| 1320 | MC and Tower temperature still oscillating. Commence heating still to increase circulation rate. |
| 1335 | Heating still to 4 mW causes oscillations to cease. P1 = 0.18 mbar, MC = 53 mK, Tower = 73 mK |
| 1346 | Still = 6 mW, 0.20 mbar. Base rises then falls again, settling at same base, MC/Tower = 53/73 mK |
| 1408 | Still = 6 mW, 1.08 K, 0.20 mbar. G1/G2 = 84/95 mbar. 1K Pot = 1.69 K, 17 mbar. Coldplate = 0.31 K. |
| 1421 | Switch to one-shot mode. Base temperatures fall quickly. After 7 minutes, MC/Tower = 30/59 mK. After another 4 minutes, MC/Tower = 27/56 mK. |
| 1435 | When MC falls to 26 mK and 80 mbar recovered to dump, switch back to circulation mode. (note still heater has been left at 6 mW throughout.) Base temperatures rising again. |
| 1458 | MC back to 53 or 54 mK |
| 1500 | Reduce still heater to 4mW, P1: 0.18mbar. No change in base temperature; MC temperature still at 54mK. G1/G2: 75/88mbar. |
| 1525 | Open needle valve to raise 1K Pot temperature to 1.656K. P2: 9.5mbar. |
| 1600 | Commence LHe transfer (36.7%) |
| 1605 | After oscillating ~53.5mK+/-0.3mK, raise 1K Pot temperature to 1.695K. |
| 1640 | MC temperature begins oscillating ~53.5mK+/-0.5mK. Not better. |
| 1645 | Turn down 1K Pot in attempt to stop oscillations. |
| 1655 | Commence LHe transfer (76.0%) |
| 1715 | Fill LN2 cold trap full. |
| 1750 | Set IP addresses of DCRC 33, DCRC 50. Unable to set IP adress of DCRC 31. Need new driver for PC (possibly). Emailing Steen. |