2016/08/22 (Monday)
| 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 48.4 cm below standard position | |
| DCRCs powered overnight. Pumping on IVC with turbo pump overnight. Baked detector for 12 hours overnight, Tower at 0.4 K until 03:59. | |
| 0830 | Tower/MC/Coldplate = 38.6/32.8/151 mK, Still = 1.27 K / 85 μbar, G1/G2 = 195/180 mbar, 1K Pot = 1.52 K / 4.5 mbar, MB = 71.6%. Boiloff rate: good. Yesterday pressure was released at 8min and 30min after filling to 91.5%. |
| 0835 | Fill LN2 cold trap. |
| 0840 | Check phonon pulses, adjust a few driver offsets, set all baselines near -0.7 or -0.8. Attempt to fix timing link by resetting it in the telnet sessions. |
| 0844 | Start short test data series at 0/0 V with DIB2 FETs off with FG=5/2/5, OG=8/3/8, with 500 initial randoms, 500 ending randoms. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window. Data from this run seems to have proper synchronization between the three DCRCs. |
| 0851 | With DIB2 FETs turned off on the ODB, Start three sets of 30min background series at -6/+6 V with FG=5/2/5, OG=8/3/8, with 1000 initial randoms, 1000 ending randoms. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window. |
| 1035 | The flash before the third series occurred on schedule but data taking did not start, there's a failure with MIDAS communicating with cdms2…. |
| 1046 | Refresh mserver frontend on cdms2 according to the procedure. After doing this, the website is back, and the data set is running, though the detector may have been biased for this entire time… |
| 1305 | Commence closing V6 to begin warm up procedure. IVC pressure at 1.0nbar. Isolate turbopump to let He accumulate. |
| 1312 | Lower mu-metal shield to 43.9cm below standard height (should be an attenuation factor of 6). |
| 1314 | V6 closed, close V13B, turn off He3 pump, turn on MC Heater to 1.0mW. |
| 1340 | Tower jumps from 1.25 K → 3.25 K, IVC = 250 nbar. G1 fell to 25 mbar then began rising. |
| 1350 | Tower = 3.4K. IVC pressure = 300nbar. Begin turbopumping IVC. Turn off MC Heater to let tower start cooling. |
| 1400 | G1 peaked at 150 nbar, Tower peaked at 3.4 K, both falling now. |
| 1420 | Tower temp = 2.2K and stable. G1/G2 stable at 70/111 mbar. Turn on He3 pump, open V13B. Begin opening V6. |
| 1510 | Still (P1) reaches readable levels at V6=13.7%, Tower = 1.4 K, G1/G2 = 260 mbar. |
| 1615 | V6 = 14.9%, Tower = 400 mK, G1/G2 = 270 mbar, Still = 1.2 mbar. Open V6 100%. |
| 1655 | Fill LN2 cold trap super full. |
| 1715 | Tower temp = 39.9mK. Raise mu-metal shield to standard position. Check phonon channels, and adjust Driver Offsets. |
| Detector has been cooled below Al transition with mu-metal shield 43.9cm below standard position | |
| 1718 | Commence 12 hour bake. |