2009/12/11
DCRC Calibration Table
| Quantity | Decimal | Hex | Output |
|---|---|---|---|
| Qi Bias | 0.04 | 201E | -0.8 mV |
| Qo Bias | -0.04 | 1FE3 | -0.3 mV |
| SQUID Bias A | 0.83 | 808 | 0.1 mV |
| SQUID Bias B | 0.24 | 802 | -0.3 mV |
| SQUID Bias C | 1.51 | 80F | -0.8 mV |
| SQUID Bias D | -0.24 | 7FD | -0.1 mV |
| QET Bias A | 34.1 | 20BC | 0.05 mV |
| QET Bias B | -1.7 | 1FF6 | 0.8 mV |
| QET Bias C | -1.2 | 1FF9 | 0.05 mV |
| QET Bias D | -0.1 -0.3 | 1FFF 1FFE | 0.26 mV -0.26 |
Set the above settings and Frontend Gain = 0, Output Gain = 1, Feedback Null = 0, Driver Offset = 0, Openloop, and Preamp on all channels as the Preset 1.
There is a 1.5 kOhm resistor in the SQUID bias line. A 9 V battery can only supply 6 mA current at most. Zapping using the battery had no effect. Zapping A using DCRC only changed MC temperature from 39.2 mK to 56 mK. Battery output much more power but the results were worse than that of DCRC.