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Model of superconducting alternating current bolometers
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View: Figures


Image of FIG. 1.
FIG. 1.

The electrical (left) and thermal (right) circuits of the AC bolometer model. The bolometer has an impedance such that the resistance R and inductance L may vary, depending on both temperature T and current I. The bolometer impedance together with the capacitance C e in the bias circuit determine the resonant frequency ω 0 of the resonator. The bolometer is biased by an AC voltage at resonance. The bolometer has heat capacity C at temperature T 0 and it is coupled to the bath temperature T b through thermal coupling G.

Image of FIG. 2.
FIG. 2.

The electrical and thermal bands of the AC bolometer model. The TB lies near DC. The AC bias couples thermal signals at frequency ω to electrical signals at frequency ω 0 + ω in the USB and frequency ω 0 − ω in the LSB. The USB and LSB comprise the electrical band, which is centered at frequency ω 0. Typically the electrical bandwidth is larger than the thermal bandwidth so that thermal signals are not strongly attenuated by the resonant circuit.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Model of superconducting alternating current bolometers