2019/11/08 (Friday)
| Setup | DIB1/2/4 → 3.2 MHz filters → cable 1/2/3 → gender changer 1/2/3 → movable source controller/board with external Feedback resistor/nothing → DCRC55(1)/DCRC33(2)/DCRC50(3) |
|---|---|
| 0910 | Tower/MC/Coldplate = 41.7/31.4/192 mK, Still = 1.52 K/ 0.130 mbar / 0 mW, G1/G2= 152/132 mbar, 1K Pot = 1.67 K / 33±2 mbar. MB= 65.2% |
| 1100 | Fill LN2 cold trap full. |
| 1100 | Check the phonon channels. DCRC2pB fell into superconducting - adjust QET bias from -107 to -115. DCRC3pB railed, adjust driver offset to get it back. |
| With source on Side 2, it may be better to do -/+ bias direction, so Am events are hole events, which may give better position info because they drift on the z-axis. | |
| 1106 | Start 60 min Bkg data series with S1/S2 = -/+4 V with edited phonon settings, Driver gain = 1, with 1000 initial randoms, trigger on DCRC2pA/B/C/D = 8/8/8/8 ADC using sequence timed_run.msl |
| 1220 | Tower = 41.4 mK Flash detector. |
| 1411 | After lots of issues with cdmsbats, we are finally able to process some data. Looking at the data taken today, we can see the 241 Am events in the center as expected. The other channels don't look to strange even with the motor present. Let's try to move the source now! |
| 1415 | Connect arduino motor controller to DIB1 motor wires with Motor A/B = wires brown,orange/red,yellow. Connect ethernet cable to arduino and power it via usb. Open a teminal and connect to the arduino via telnet: telnet cdms-arduino1. Then type marco until it responds polo. |
| 1418 | Tower = 41.3 mK, might be a little less stable since powering the arduino. |
| 1421 | Looks like there's a little extra noise at ~15kHz in the phonons. Yep, it goes away when the arduino is powered down. |
| 1428 | Power arduino up again and connect to it via telnet. Set motor power supply to 8.0 V. Send command mvto 50 to move 50 steps. Tower rises to 1.6 K, MC rose to a few hundred mK |
| 1430 | Tower = 230 mK and falling. |
| 1440 | Circulation pressures have slowly risen from 160 to 185 mbar. Then slowly fall as tower cools. Still pressure rose and fell also. |
| 1445 | Tower = 70 mK and falling. Now seeing phonon pulses again, previously just noise |
| 1456 | Tower = 53.5 mK and falling. |
| 1457 | Let's try another move but with lower dwell. Set wr dwell 8 (was 15 previously). Send command mvto 100. Tower spikes to 1.35 K and starts to cool. |
| 1500 | Tower = 270 mK |
| 1503 | Tower = 141 mK |
| 1506 | Tower = 106 mK |
| 1508 | MC = 66.1 mK Send command mvto 150. MC rises to 198 mK, then starts to cool. |
| 1512 | MC = 141 mK |
| 1515 | MC = 98.3 mK |
| 1516 | Tower = 120 mK. Power down arduino setup by shutting off motor power supply, quitting arduino telnet session, and unplugging arduino power. |
| 1550 | Tower = 47.6 mK, getting back to normal. Circulation pressures are close to normal too. |
| 1601 | Fill LN2 cold trap full. |
| 1624 | Tower = 43.4 mK. Adjusted phonon driver offsets, channels look good. |
| 1624 | Start 60 min Bkg data series with S1/S2 = -/+4 V with edited phonon settings, Driver gain = 1, with 1000 initial randoms, followed by 30s flash trigger on DCRC2pA/B/C/D = 8/8/8/8 ADC using sequence timed_run_and_flash.msl |
| 1753 | Tower = 41.7 mK |
| 1757 | Start 60 min Bkg data series with S1/S2 = -/+4 V with edited phonon settings, Driver gain = 1, with 1000 initial randoms, followed by 30s flash trigger on DCRC2pA/B/C/D = 8/8/8/8 ADC using sequence timed_run_and_flash.msl |
| 1908 | Tower = 41.6 mK. Power up. connect to arduino, turn on motor power supply. Set the current step with wr currstep 150. Set the dwell with wr dwell 8. Shoot, something I did there made the tower temp spike to 1.9 K. |
| 1916 | Tower = 185 mK |
| 1916 | Tower = 145 mK. Move 10 steps to step 160 with mv +10. Tower spikes to 780 mK. |
| 1923 | Tower = 140 mK. Move 10 steps to step 170 with mv +10. Tower spikes to 820 mK. |
| 1929 | G1 peaked at 200 mbar |
| 1931 | Tower = 87 mK. If we're moving to higher radii, the first indium blocker should be at step 278. Let's go for it. Send command mvto 278. Tower spikes to 1.6 K |
| 1935 | Tower = 268 mK |
| 1937 | Tower = 181 mK |
| 1939 | Power down and disconnect arduino |
| 2010 | Tower = 50.5 mK |
| 2025 | Tower = 46.1 mK |
| 2047 | Tower = 43.7 mK. Adjusted phonon driver offsets, channels look good. |
| 2048 | Start 60 min Bkg data series with S1/S2 = -/+4 V with edited phonon settings, Driver gain = 1, with 1000 initial randoms, followed by 30s flash trigger on DCRC2pA/B/C/D = 8/8/8/8 ADC using sequence timed_run_and_flash.msl |
| 2130 | A quick look at this latest data shows the 60keV line still visible. So either we're moving towards the center of the detector, or we're not moving, or the motor is skipping steps. |
| 0024 | Start 6×60 min Bkg data series with S1/S2 = -/+4 V with edited phonon settings, Driver gain = 1, with 1000 initial randoms, followed by 30s flash trigger on DCRC2pA/B/C/D = 8/8/8/8 ADC using sequence take_and_flash_loop.msl |