| Status | Run 75 in progress |
| Setup | Tower Faces 5/3/2 → Cables 2/1/3 → nothing/diverter_board/nothing → DCRC55(1)/DCRC50(3)/DCRCx(4) |
| 1110 | Goldman/Tower/MC/Coldplate = 56.2/140/37.2/222 mK, Still = 1.8 K / 0.140 mbar / 0 mW, G1/G2= 172/167 mbar, 1K Pot = 1.64 K / 26±2 mbar. MB = 70.5% |
| | Coldplate and Still thermometers reading anomalously high, as they sometimes do (always both at the same time). Still thermometer reading not very stable. |
| 1125 | Fill LN2 cold trap bath |
| 1125 | Start DAQ programs with all 3 DCRCs enabled. Timing link seems to be working. Relock some channels and adjust some QET biases, get pulses in 11 working channels (DCRC3pD = Side1pF not working). |
| 1355 | Let's do some automated IbIs. First: set up DAQ with just one DCRC enabled. Turn off any phonon triggers. Look at the first channel: DCRC1pA. Manually try to find the IbIs peak, looks like it's around 280. Adjust Driver Offset so that baseline is somewhere near the top at this peak value, around 1.0 V. Found an old sequence, IbIs_loop_DCRC1pA.msl. Default is to start at some high QET bias then step down in steps of -2 uA. Pause 3 sec then take 3 sec of data and save, with filename indicating channel and bias. We can edit to change 1) start QET bias 2) number of steps 3) final QET bias setting, to return the channel to transition. Note: other channels are in transition - we want that or else IbIs may not be the same as in the case when some channels are superconducting. |
| 1400 | Set up IbIs_loop_DCRC1pA to start at 400, loop 150 times, then reset to 280. Nominally this will take 15 minutes but it will certainly take longer because of sequencer overhead. |
| 1405 | Start automated IbIs on DCRC1pA. 398 to 102 uA step 2. Sequence takes 33 minutes. |
| 1440 | The sequence saves the data files to the /livedata directory, but doesn't move them to a folder in /byseries. So I did this manually - created /byseries/071210_1405 and moved all the data there. |
| 1455 | Adjust Driver Offset on DCRC1pB so that IbIs peak is near top of range (1 V). Make new sequence IbIs_loop_DCRC1pB, as with the other we will start at 400 stepping down by -2 over 150 steps. (final QET bias = 102.) |
| 1455 | Start automated IbIs on DCRC1pB. 400 to 102 uA step 2. Takes 31 minutes. |
| 1530 | Move IbIs data files to a new directory as follows (using a terminal as sudo user spa-u-cdmssoft): |