Complex impedance measurements of calorimeters and bolometers: correction for stray impedances

Details Complex impedance measurements of calorimeters and bolometers: correction for stray impedances Complex impedance measurements of calorimeters and bolometers: correction for stray impedances

2007-04-23

arxiv.org/abs/0704.3066v1

Rev.Sci.Instrum.78:043105,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures

Scientific paper

10.1063/1.2723066

Impedance measurements provide a useful probe of the physics of bolometers and calorimeters. We describe a method for measuring the complex impedance of these devices. In previous work, stray impedances and readout electronics of the measurement apparatus have resulted in artifacts in the impedance data. The new technique allows experimenters to find an independent Thevenin or Norton equivalent circuit for each frequency. This method allows experimenters to easily isolate the device impedance from the effects of parasitic impedances and frequency dependent gains in amplifiers.

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