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2023/11/01 (Wednesday)

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  • Lab in-personnel: Himangshu, Ping
Status Run 78 beginning. DCRCs are kept ON.
1351 Tower(U28)/MC(H35)/Coldplate = 107/40.4/195.7 mK, Still(P1) = 1.41 K / 0.14 mbar / 0 mW, G1/G2 = 158/147 mbar, 1K Pot(P2) = 37.5° / 1.65 K / 28 mbar, MB = 29.1%
1353 Prepare for LHe trasnfer. Open cmd prompt, goto cd C:\Users\spa-k100lab\Desktop and type python cam_snapshots.py. Make sure that cam_snapshots folder is empty. Get the He dewar.
1342 Cable 2/1/3 → diverter/nothing/nothing → DCRC55(1)/DCRC50(3)/DCRCX(4)
1350 Fill LN2 cold trap
1417 Start LHe transfer @ MB=29%
1503 End LHe transfer @ MB=89.7%
1807 SQUID tuning.
1816 Start a Run with all programs running: towerfe, triggerfe and SQUIDTuningGUI. Open the “SQUID Control” GUI by clicking the button in the SQUIDTuningGUI.
1816 Set the trigger to be Random trigger, Test Signal On for PB, Click Connect to Feedback and then Open Editor for Channel PB
1816 Set QETBias=0, Output Gain=1, Phonon Offset=0, Polarity=Open Loop, Signal Source= PreAmp, Look for balancing the SQUID Modulation by changing the values for SQUID Bias and Lockpoint.
1822 DCRC1pB, SQUID Bias= -71.8 uA, Lockpoint=-2.94 mV, FeedbackGain=1
1822 Change the Polarity to Inverting and Signal Source to Feedback. Close this window and change to next channel, Turn on feedback signal for that channel and Open editor
1829 DCRC1pC, SQUID Bias= -81.1 uA, Lockpoint=-4.77 mV, FeedbackGain=1
1830 Change the Polarity to Inverting and Signal Source to Feedback. Close this window and change to next channel, Turn on feedback signal for that channel and Open editor
1834 DCRC1pD, SQUID Bias= -88.5 uA, Lockpoint=-2.78 mV, FeedbackGain=1
1840 Change the Polarity to Inverting and Signal Source to Feedback. Close this window and change to next channel, Turn on feedback signal for that channel and Open editor
1841 DCRC3pA, SQUID Bias= -58.1 uA, Lockpoint=-3.44 mV, FeedbackGain=1
1845 Change the Polarity to Inverting and Signal Source to Feedback. Close this window and change to next channel, Turn on feedback signal for that channel and Open editor
1846 DCRC3pB, SQUID Bias= -80.1 uA, Lockpoint=-3.95 mV, FeedbackGain=1
1849 DCRC4 is not showing Feedback signal. Need to go in and change DCRC to find the SQUID tuning parameters
1939 Prepare for IbIs scan. Start a run from the ODB and Keep the SQUIDTuningGUI to view traces on the given channel that you want the IbIs scan. Open command prompt on cdms2 with Midas UMN environment variables set. Goto ~/scripts/custom_code_neog/
1956 Check that Highest value of QETbias and Min value of QET bias is not taking the trace out of viewing window on the GUI . This is done by manually setting the QETbias to say, 500 on the ODB phonon channel and looking at the trace on the GUI. Start IbIs scan for DCRC3 pA using command: python3 ibis_sequencer_oneset.py –min_bias 100 –max_bias 500 –step 10 –dcrc 3 –chan 0
2004 Scan for DCRC3pA

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