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2012/10/10

1020 Fed Cricket 3 pellets.
1030 Filled LN2 cold trap.
1034 Stopped flashing detector.
1436 Zapping the SQUIDs doesn't seem to have an effect on Channel B of board 31. Still also getting an error message when zapping, though the temperature does increase when I press “zap all” and then “continue” on the error message.
1536 Start LHe transfer (13.9%).
1603 Finally got somewhat of a decent triangle wave out of channel b on DCRC 31. It's slightly jumpy, though, and the modulation curve has some wiggles in it at the peak. Zapping is still problematic as before.
1715 End LHe transfer (78.8%)
Fill LN2 cold trap.
Table 1: DIB 3, DCRC 31
Phonon Channel SQUID Bias (micro A) Lockpoint (mV) Modulation Depth (mV) QET Bias (uA) Inverting or Not? Comment
A 85 4.57 4.76 -40 NI
B 66 2.7 3.8 -30 I
C 82 4.7 4.8 -85 NI
D 85 3.5 4.94 -65 NI
1945 Note- all QET biases in tables are not quite correct. Refer to *_pQB files under run032 for correct QET biases.
1948 Start taking data (07121010_1948) with Dib 1 @ -4 V, Dib 2 @ +4 V, Dib3 @ 0 V; 3 series at 1 hour each. After first set, reverse biases and do another set; 0.1 min flashing, 20 min cool down.
Mixing chamber temperature: 59.5 mK. How exciting!!