2016/03/02 (Wednesday)
| Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50 | |
| DCRCs unpowered overnight | |
| 0825 | Tower/MC(H35)/MC sensor/Cold Plate = 30.7/26.2/39/149 mK, Still = 1.13 K / 0.090 mbar, G1/G2 = 130/120 mbar, 1K Pot = 1.59 K / 4.5 mbar, Main bath = 74.7% |
| 0830 | Fill LN2 cold trap Dewar |
| 0835 | Repower DCRCs, zap SQUIDs, reestablish timing link, check phonons, fix DIB1pB by adjusting phonon offset voltage |
| 0900 | Perform mini IbIs on all three DIBs with all Phonon, FET, LED, QBias/Drain/Source lines on pi-filter switchboards switched ON. (only thing off is Qfeedback.) DIB1pB wave form is very choppy. |
| 0925 | Zap SQUIDs again. Relock DIB1pB. Doesn't seem to help the choppiness. |
| 0935 | Unpower DCRCs. Switch all filter switches to ON. Repower DCRCs. Zap SQUIDs. Reestablish timing link. Fix phonons. |
| 1030 | Perform mini IbIs on all three DIBs with all lines on pi-filter switchboards switched ON. DIB1pB wave form looks much better after power cycle. Power off DCRCs, switch off filters for FET Heaters, FET TSense, and LEDs (lines: 46, 45, 49, 42, 26). Repower DCRCs, zap SQUIDs. |
| 1100 | Perform mini IbIs on all three DIBs with all lines on pi-filter switchboards switched ON except FETs and LEDs. Unpower DCRCs, switch FET switches back on, so only LED lines are unfiltered (lines: 42, 26). Repower DCRCs. Zap SQUIDs. |
| 1200 | Perform mini IbIs on all three DIBs with all lines on pi-filter switchboards switched ON except LEDs. Unpower DCRCs, switch off Qi/Qo Drain and Source switches, in addition to LED lines (unfiltered lines: 42, 26, 16, 31, 12, 27). Repower DCRCs. Zap SQUIDs. |
| 1330 | Perform mini IbIs on all three DIBs with all lines on pi-filter switchboards switched ON except LEDs and Qi/Qo Drain & Source. Unpower DCRCs, switch off Qi/Qo Bias switches, in addition to already unfiltered lines (unfiltered lines: 11, 15, 42, 26, 16, 31, 12, 27). Repower DCRCs. Zap SQUIDs. Set up timing link. Check phonons, all ok. |
| 1445 | Perform mini IbIs on all three DIBs with all lines on pi-filter switchboards switched ON except LEDs and Qi/Qo Bias & Drain & Source. Unpower DCRCs, switch on qBias and qSource switches (unfiltered lines: 42, 16, 26 12). Repower DCRCs. Zap SQUIDs. Set up timing link. Fix phonons. |
| 1545 | Perform mini IbIs on all three DIBs with all lines on pi-filter switchboards switched ON except LEDs and Qi/Qo Drain. Unpower DCRCs, switch all filters ON on DIB2/DCRC33 (the RevC board), and switch all filters OFF on DIBS 1&3/DCRCs 55&50 (RevC.1 boards). Repower DCRCs. Zap SQUIDs. |
| 1625 | Perform mini IbIs on all three DIBs with all filters ON on DIB2/DCRC33 and all filters OFF on DIBS 1&3/DCRCs 55&50. |
| 1635 | DIB2 pA shows large white noise component (i.e. fat traces). Looks related to Frontend Gain, though the settings are what they normally are (2x). Repower DCRC33, zap SQUIDs. Everything back to normal. |
| 1706 | Unpower DCRCs, and switch (on DIBs 1&3) all filters ON except charge channels (all except lines: 50, 27, 16, 30, 11, 12, 15, 31). Repower DCRCs. Zap SQUIDs. |
| 1754 | While performing mini IbIs on all three DIBs with all filters ON on DIB2/DCRC33 and all filters ON Except Charge Lines on DIBS 1&3/DCRCs 55&50, DIB1 pD had railed, so opened up SQUID Tuning GUI to relock the SQUID. I also had the ODB page open in my browser at the same time, which is how I noticed that opening the SQUID Tuning GUI caused all the channels of DIB 1 to have their Lockpoints and SQUID Biases set to the same values (i.e. the values that were previously only applied to DIB1 pD). This looks like a bug, but for now I'll just load old values of the ODB. |
| 1820 | Unpower DCRCs. Detach pi-filter switchboards, attach DCSUB filters, repower DCRCs and Zap SQUIDs. Load ODB file from MIDAS Run 2502 to get back proper SQUID biases and Lockpoints. |
| 1840 | Fill LN2 cold trap full. |
| 1855 | It seems like loading up an old configuration may have caused the phonon channels to get upset or something. Every single channel is railed. Some require significantly higher than usual Driver Offsets in order to unrail. Something to watch. All pulses good, though. |
Spreadsheet of Mini-IbIs data