| | Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50. |
| | Overnight: Taking Cf data. Last flash at 6:54. Tower temp stable between flashes. |
| 0855 | Tower/MC(H35)/MC sensor/Cold Plate = 31.1/25.6/42.2/161 mK, Still = 1.41 K / 0.11 mbar, G1/G2 = 150/145 mbar, 1K Pot = 1.73 K / 20 mbar, Main bath = 38.7% |
| 0900 | Fill LN cold trap Dewar. |
| 0944 | Put Cf source in safe. |
| 1115 | Restart Vuk-01 for update purposes. |
| 1156 | Low frequency noise (150Hz) present, but weak. Start background data : 4 cycles of 15min series at -/+2V, FG=5/2/5, OG=3, with 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown in between. |
| 1300 | Looking at PSDs for data, see that low frequency noise has gotten worse, so stop DAQDAQ during one of its cooldowns to investigate noise. |
| 1305 | Noise is bad enough that power cycle is justified. Power off DCRCs and wait for temperature to fall. |
| 1355 | After powering up the DCRCs, zap SQUIDs on DIB1, but the low-frequency noise is still there, and DIB1 phB has been “lost” again (showing jagged noise and no pulses). Unpower the boards to let them cooldown again. |
| 1536 | Commence LHe transfer. (28.2%) |
| 1630 | DCRC55 DIB1 pB still “lost” and showing jagged noise as though it's normal or superconducting. Does not respond to changes in QET bias. Several power cycles do nothing. Try tapping the DCRC/moving it around, and the channel rails. Relock the SQUID and pulses are back on the channel! |
| 1635 | DIB1 pB gone again. Pick up and drop DCRC55 ~1cm. pB rails, relock SQUID, and channel shows up still with jagged noise. Jiggle D50 connector on back of DCRC, and pB rails again. Relock SQUID to unrail, and pB shows pulses! |
| 1640 | Cease LHe transfer (94.2%). |
| 1651 | Start background data : 1 cycles (accidentally) of 15min series at -/+2V, FG=5/2/5, OG=3, with 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown in between. |
| 1740 | Fill LN2 cold trap full. |
| | Start background data : 19 cycles of 15min series at -/+2V, FG=5/2/5, OG=3, with 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown in between. |