Performance of microstrip-coupled TES bolometers with finline transitions

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We have fabricated TES bolometers with finline transitions for the ClOVER project. We have measured the optical response of ClOVER's first prototype 97-GHz detectors and find that they have a detection efficiency close to 100%. We have also investigated the effects of misalignment of the finline in the waveguide and of thinning the substrate. The prototype detectors have dark NEPs as low as 1.5 x 10-17W/√Hz and satisfy the requirement of photon-noise limited operation on ClOVER. We describe the optical tests of ClOVER's prototype 97-GHz detectors and discuss their implications for the design of the science-grade detectors.

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