| | These addresses can be seen in the ODB. However the name of the DCRC is not present: it's just “DCRC1”, “DCRC2”, “DCRC3” on the ODB, i.e. the corresponding DIB numbers. |
| 1050 | Started all three DCRCs with telnet sessions on port 5000. Issued wr 15 0, wr 15 20, rd 30 commands. On DCRC33, rd 30 returned 0000, so did wr 30 0900, then wr 30 0800. |
| 1055 | Started the three MIDAS DAQ programs (dcrc, tower, trigger) |
| 1115 | On MIDAS ODB in Equipment/TriggerFE/Settings set the PileupCut to 0.0032768 s (i.e. one entire trace length) |
| 1125 | On MIDAS ODB, DIB1 phonon VGAGain (aka “output gain” in LabVIEW terminology) were set to 0. Reset these to 5. Now the VGAGains of DIB1/2/3 are 5/2/5 as before. |
| | a lot of other phonon settings on DIB1 are clearly set wrong, will need to reset them |
| 1135 | Try zapping with MIDAS. Still pressure and tower temperature increases seen, so it seems to have worked. |
| 1140 | Establish timing link through telnet sessions |
| 1203 | Attempt to flash with Midas via flashandflash.py program. We noticed that this had a default setting of flashing for .1 s and resting for 5 s, and a total flashing time of .1 hours. This seemed wrong, as the Labview program flashes for 100 us, and rests for 5000 us, a tenth of these values. We changed the flash settings to these values and set the flash duration for one minute (0.017 hours). The script then starting 12000 loops of flashing, which was certainly too many. After about a minute it had only gone through ~20 loops, though the temperature had risen to 240 mK and appeared stable. We stopped the program immediately, and then used odbedit to load run00652.odb, which caused the temperature to fall back to normal. These settings were chosen because this data was taken on December 18th at 00:48, as indicated by the odb file in /home/hep/cdmssoft/scdmsDAQ/MidasDAQ/online/data/livedata/. EDIT: We have learned that 100 ms flashing on and 5 s sec off ARE correct, and the labview units are just wrong. We likely just bogged it down with such small values. Our bad. |
| 1205 | Loading the ODB settings set the charge biases to -/+ 4 V, so reset these to zero on the ODB |
| 1240 | Tower has cooled to around 40 mK. Using MIDAS pulse viewer to check phonons: |
| DIB1 | pB was railed at 1.2 V. Adjusting the offset from -0.4 to -0.11 fixed it. |
| DIB2 | All phonons railed at -1.2 V. Adjustments in offset don't seem to help. |
| DIB3 | Sinusoidal noise seen at 7050 Hz, very prominent in pC at 60 mVpp. |
| 1330 | Main bath = 62.5% |
| 1330 | Try zapping all phonons again. |
| 1355 | 7 kHz noise still quite prominent in DIB3pC. |
| 1405 | Still having trouble with DIB2. No pulses are present, phonon or charge. Try flashing DIB2 only, to see whether there is any communication at all. Tower climbs to 64 mK so yes, there is communication. |
| 1532 | Fill LN2 cold trap full. |
| 1615 | Main bath = 57.9% |
| 1645 | Tower oscillating a bit, has been as low as 38.1 mK, currently 39.5 mK. MC(H35) = 29.5 mK. 1KPot, Still, circulating pressures very close to this morning's values. |