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Table 3

Measured parameters for the demonstrator system.

pixels λ λ/ Δλ NEPdet Absorption Instantaneous Cosmic Ray Crosstalk 1/f knee 1/f knee Yield
efficiency dynamic ranged dead time phase amplitude

961 350 μm 5 >0.72a 1 × 105 <5% <−30 dB n.a.b <0.05 >83%
0.2 Hzc <0.05c

Notes. The 1/f knee is given for “cold and dark” conditions, applicable for low-background imaging systems, and for a 56 fW power per pixel, which is the estimated low-power limit for a CMB mission.


The absorption efficiency is referred to an optimal design with a single polarisation input which has an aperture efficiency ηAE = 0.8. The measured aperture efficiency ηAE = 0.58.


The spectra at “dark and cold” conditions (10 aW/pixel) are not white.


Measured at 50 fW power per pixel.


The instantaneous dynamic range is defined as the ratio of the maximum source power divided by the limiting NEP under dark and cold conditions.

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