2018/03/22 (Thursday)
| Setup: DIB1/2 → SL 43/41 → 3.2 MHz filters → cables 3/1 → DCRC50(3)/55(1). | |
| Status: Cooled to base yesterday, baked detector overnight. | |
| 0920 | Tower/MC/Coldplate = 520/174/245 mK, Still = 1.42 K / 0.200 mbar, G1/G2 = 100/96 mbar, 1K Pot = 1.66 K / 40 mbar. Main bath = 22.5% |
| 0925 | End bake by turning off all four LEDs |
| 0930 | Fill LN2 cold trap bath |
| Minutes since end of bake | Tower [K] |
|---|---|
| 0 | 520 |
| 5 | 96 |
| 10 | 68 |
| 15 | 55 |
| 20 | 49.4 |
| 25 | 46.5 |
| 30 | 44.2 |
| 35 | 43.4 |
| 40 | 42.8 |
| 50 | 42.2 |
| 60 | 42 |
| 1035 | Tower = 41.8 mK |
|---|---|
| 1222 | Begin LHe transfer @ 17.7% |
| 1314 | End LHe transfer @ 91.2% |
| At beginning and end of transfer, Tower temperature spiked a few mK. At the beginning the 1K Pot pressure spiked, and after that began to drift downward… | |
| 1320 | 1K Pot = 1.62 K / 30 mbar. Tweak needle valve open a little more. 1K Pot → 1.66 K / 45 mbar. |
| 1330 | Set bias on all four charge channels to 12 V. Tower spikes 42→44 mK then falls back |
| 1334 | Start 3hr 20min series of 12V data (DCRC bias), with 1000 beginning randoms, and a 80/80/100/80 bin threshold trigger on DCRC1qI/qO/DCRC3qI/qO, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). |
| 1635 | Fill LN2 trap full. |
| 1659 | Start bias scan sequence of 30 min series , with DCRC bias = (1,3,5,7,9,11,-1,-3,-5,-7,-9,-11), with 30s flash, 30min cooldown, 1000 beginning randoms, and a 80/80/100/80 bin threshold trigger on DCRC1qI/qO/DCRC3qI/qO, with 1.6384 ms pulses (8192 length) and 400 us prepulse (500 length). |