2017/07/27 (Thursday)
| Setup: DIB 1/3/4 → 3.2 MHz filters 1/2/3 → cable 1/2/3 → gender changer 1/3/4 → DCRC55(1)/33(2)/X(4) | |
| overnight: took charge bias scan data. During the data sequences, Tower temperature fell from about 26.4-26.5 mK to 25.6-25.7 mK. No indication of fridge heating / breakdown occurring at the higher biases (4 V, 5 V). |
|
| 0915 | Tower = 25.4 mK, Still = 0.060 mbar, G1/G2 = 161/148 mbar, 1K Pot = 1.70 K / 32 mbar. MB = 70.1% |
| 0915 | Lab = 23.2 C, Humidity = 41% |
| 0920 | Fill LN2 cold trap bath. |
| 1336 | Apply 0V QET bias settings |
| 1343 | Start 10 min series of 20Hz Randoms, Tower = 25.5±0.1 mK |
| 1354 | Apply 1 uW to mixing chamber |
| 1405 | Tower temp seems stable at 28.5±0.2 mK |
| 1406 | Start 10 min series of 20Hz Randoms, Tower = 28.7±0.1 mK |
| 1419 | Apply 2 uW to mixing chamber |
| 1507 | Tower temp seems to be flattening out to ~34mK but its taking a while |
| 1508 | Start 10 min series of 20Hz Randoms, Tower = 34.1±0.3 mK |
| 1522 | Apply 3 uW to mixing chamber |
| 1543 | Start 10 min series of 20Hz Randoms, Tower = 36.4±0.7 mK |
| 1603 | Apply 4 uW to mixing chamber |
| 1617 | Start 10 min series of 20Hz Randoms, Tower = 44.7±1.4 mK |
| 1635 | Turn off MC heater |
| 1637 | Fill LN2 cold trap |