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Fig. 6

image

a) Fractional frequency response (Δff0) for a pair of LEKIDs plotted as function of the blackbody load temperature. The response of the tworesonators sensitive to orthogonal polarizations is approximately 2 ppm/K and linear. b) Noise spectra for detectors sensitive to orthogonal polarizations under a 3.4 K blackbody load. The fits of the noise spectra are plotted in solid black. The noise in both detectors is similar in shape with the white noise rolling off at approximately 700 Hz. The device noise is plotted as the dashed line and is used in combination with the response of the detectors to calculate the NET. The NETs referenced to 3.4 K for polarization A and B are 68 and 69 respectively. c) Histogramof the responsivity of the detectors across the array. The data is for 78 detectors that were read out automatically using our readout software. When read out automatically, the number of detectors with usable data is primarily defined by how many readout tones land sufficiently close to the targeted resonance frequencies without further refinement. d) Histogram of the device noise level for 78 detectors across the array.

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