| Status | IVC is open. Mixture has been cryocleaned 3 times. Fridge is evacuated but should probably be pumped out again. 1K Pot needle valve is open, so now there will be air in the pot, should pump it out before cooling. Cryostat vacuum jacket has been pumped down to 190 ubar, maybe should be pumped out more before cooling. De-installation has been done up to 100mK shields. |
| 0845 | MC(Cernox) = 297.7/298.4 K on LakeShore/LabVIEW vi. Temperature reached maximum at around 23:00 last night.
Lab = 23.7 C, 38% humidity.
Lab = 296.9 K. So the LakeShore calibration seems to be closer - both are actually a little high it seems. |
| 0855 | Open (warm) Trap 2 to G1. Reads 24.3 mbar of contaminants after cleaning#3 (75 minutes).
Pump out Trap 2. Then put it in the LN2 bath. |
| Cryocleaning log |
| date | duration (minutes) | contaminants removed (mbar) |
| June 15 | 125 (may not have had flow the entire time) | 54 |
| June 15 | 70 | 45.3 |
| June 15 | 75 | 24.3 |
In the last run we had multiple throughput blockages which we eventually concluded were due to insufficient cryocleaning. The results above are already lower than the very high contaminant pressures we found in the cleanings last run. The last cleaning in the previous run got out 18.6 mbar, so maybe we will clean one more time for this run.
| 1554 | Remove tower from fridge and place in clean room. When installed, Kapton tape had been used to secure external LED wires to the spool. Now, it seems that these all had fallen off during the run. |
| 1600 | Move tower into clean room |
| 1610 | Post-mortem tower electrical check: |
| Detector | S101 | DIB | 1 | |
| side coax | ST-3-3 | date/who: | 2017-06-16 | MF GR |
| face | 5 | | | |
| +lead | - lead | signal | typical | measured |
| 1 | 2 | QET A | 100 to 200 Ω | 403 Ω |
| 2 | 4 | QETA-B | 100 to 200 Ω | 5080 Ω |
| 3 | 4 | QET B | 100 to 200 Ω | 208 Ω |
| 4 | 6 | QETB-C | 100 to 200 Ω | 3620 Ω |
| 5 | 6 | QET C | 100 to 200 Ω | 492 Ω |
| 6 | 8 | QETC-D | 100 to 200 Ω | 4110 Ω |
| 7 | 8 | QET D | 100 to 200 Ω | 375 Ω |
| 2 | 8 | QETA-D | 100 to 200 Ω | 4240 Ω |
| 9 | chassis | LED1 Rforward | 8 to 9 MΩ | 18 kΩ |
| 9 | chassis | LED1 Vforward | 1.0 to 1.1 V | 0.720 V (prev 1.053 V) |
| chassis | 9 | LED1 Rreverse | <1 nS | 110 kΩ |
| 10 | chassis | LED2 Rforward | 8 to 9 MΩ | 760 kΩ |
| 10 | chassis | LED2 Vforward | 1.0 to 1.1 V | 1.090 V |
| chassis | 10 | LED2 Rreverse | <1 nS | 0.4 nS |
| All pins → Ground | <1.0nS | (Except for LED pins) | all ~1 nS |
| Detector | S101 | DIB | 3 | |
| side coax | ST-3-9 | date/who: | 2017-06-16 | MF GR |
| face | 3 | | | |
| +lead | - lead | signal | typical | measured |
| 1 | 2 | QET A | 100 to 200 Ω | 265, prev 246 Ω |
| 2 | 4 | QETA-B | 100 to 200 Ω | 6200 Ω |
| 3 | 4 | QET B | 100 to 200 Ω | 129 Ω |
| 4 | 6 | QETB-C | 100 to 200 Ω | 5250 Ω |
| 5 | 6 | QET C | 100 to 200 Ω | 132 Ω |
| 6 | 8 | QETC-D | 100 to 200 Ω | inf Ω |
| 7 | 8 | QET D | 100 to 200 Ω | inf Ω |
| 2 | 8 | QETA-D | 100 to 200 Ω | inf Ω |
| 9 | chassis | LED1 Rforward | 8 to 9 MΩ | 790 kΩ |
| 9 | chassis | LED1 Vforward | 1.0 to 1.1 V | 1.093 V |
| chassis | 9 | LED1 Rreverse | <1 nS | 0.2 nS |
| 10 | chassis | LED2 Rforward | 8 to 9 MΩ | 790 kΩ |
| 10 | chassis | LED2 Vforward | 1.0 to 1.1 V | 1.092 V |
| chassis | 10 | LED2 Rreverse | <1 nS | 0.3 nS |
| All pins → Ground | <1.0nS | (Except for LED pins) | all ~1 nS |
| Detector | S101 | DIB | 4 | |
| side coax | ST-3-10 | date/who: | 2017-06-16 | MF GR |
| face | 1 | | | |
| +lead | - lead | signal | typical | measured |
| 1 | 2 | QET A | 100 to 200 Ω | 456 Ω |
| 2 | 4 | QETA-B | 100 to 200 Ω | 6250 Ω |
| 3 | 4 | QET B | 100 to 200 Ω | 510 Ω |
| 4 | 6 | QETB-C | 100 to 200 Ω | 5110 Ω |
| 5 | 6 | QET C | 100 to 200 Ω | 453 Ω |
| 6 | 8 | QETC-D | 100 to 200 Ω | 6570 Ω |
| 7 | 8 | QET D | 100 to 200 Ω | 481 Ω |
| 2 | 8 | QETA-D | 100 to 200 Ω | 5230 Ω |
| 9 | chassis | LED1 Rforward | 8 to 9 MΩ | 800 kΩ |
| 9 | chassis | LED1 Vforward | 1.0 to 1.1 V | 1.1 V |
| chassis | 9 | LED1 Rreverse | <1 nS | <1 nS |
| 10 | chassis | LED2 Rforward | 8 to 9 MΩ | 790 kΩ |
| 10 | chassis | LED2 Vforward | 1.0 to 1.1 V | 1.083 V |
| chassis | 10 | LED2 Rreverse | <1 nS | <11 nS |
| All pins → Ground | <1.0nS | (Except for LED pins) | all ~1 nS |
Note that the two non-functioning channels, those that appeared to have their TES's open (DIB3pA/Side2pB and DIB4pA/Side2pC), show no significant differences in the tower checkout as compared to pre-run. This leaves two possibilities: maybe it's a problem with the SQUET - this should be checked - or maybe it's a fundamental problem with the channel on the detector.
| 1640 | Put tower into N2 purge |
