| 摘要 |
Improved calibrations associated with superconducting quantum interference devices (SQUIDs) are accomplished using a single calibration ring that is placed on an outer dewar wall. During initial calibration, a standard current is passed through the calibration ring and channel responses are measured and recorded. During re-calibration, any channel responses that have changed from the original value U to a new value U', are identified and the corresponding empirical coefficients for these channels are changed from an old value of C to a new value C' given by: C'=(U'/U)CChannel responses in subsequent measurements are divided by these coefficients C' in order to make them equal for equal magnetic field inputs, or to provide equal channel sensitivities.
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