2016/08/13 (Saturday)
| Setup: iZIP mode, DIB1/2/3 → 3.2 MHz filters → cables → DCRC55(1)/33(2)/50(3), Tower has been cooled below Al transition with mu-metal shield at standard position | |
| DCRCs powered overnight, baked last night. Tower temperature was stable at ~400mK, and now cooled to 40.3mK. Pumping on IVC with turbo pump overnight. | |
| 1000 | Tower/MC/Coldplate = 40.3/40.3/157 mK, Still = 1.31 K / 60 μbar, G1/G2 = 209/193 mbar, 1K Pot = 1.53 K / 4.5 mbar, MB = 27.0%. Boiloff rate: good |
| 1005 | Fill LN2 cold trap full. |
| 1010 | Phonon and charge channels look as expected. All showing pulses, except DIB2 Qi, which still shows the noise. DIB2 pC also shows some jagged noise. Reset timing link, just to make sure, but the noise persists. |
| 1025 | Commence LHe transfer (25.6%). |
| 1050 | While editing the TEST_n10-n13_flashandsweep.msl sequence file to make a version for Asymmetric Bias Sweep sequence, attempting to rename the file just saves the modified version under the same name. So now TEST_n10-n13_flashandsweep.msl contains the Asymmetric Bias Sweep sequence. I don't know how to rename it other than manually in the directory. |
| 1110 | Cease LHe transfer (93.3%). |
| 1115 | Release pressure from Main Bath. |
| 1120 | All phonon channels alive and well after adjusting Driver Offsets. Tower temperature at 40.5mK. 1K Pot = 1.23K / 5.5mbar. Looks like it's been very constant overnight, so I'll just leave it. Turn on Still heater to 1.0mW to see if that lower base. |
| 1130 | Tower temp = 40.0mK, so maybe a little. Increase Still Heater to 2.0mW. |
| 1140 | Release pressure from Main Bath a second time. |
| 1210 | Tower temp settles around 41.7mK, so turn off the still heater… |
| 1213 | Start 6 hours of 30min background series. 2 at -4/+4 V, 2 at -4/0 V, 2 at -4/+6 V with FG=5/2/5, OG=8/3/8, with 1000 initial randoms, 1000 ending randoms, with 30s flash and 25 minute cooldown between series. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window. |