Addressing the impact of non-linearity in superconductive bolometers to test cosmological inflation from space with a CMB polarimeter

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Concerning the hardware side of this proposal, dark characterization of TES bolometers developed by our colleagues at UC Berkeley is progressing. We have been able to test space-like bolometers and verify the requirements in terms of critical temperature, saturation power and time-constant. A more advanced characterization procedure is being tested and has started producing preliminary results of complex impedance that can complement other methods that make use of multiplexing TES readout.We have also developed a test-bed to perform TES magnetic sensitivity tests that are necessary to inform the design of magnetic shielding structures for future CMB experiments like LiteBIRD. Results have been presented at international conferences and published as conference proceedings.The simulation code has been used to produced a forecast of the impact of detector non-linearity on simulated data. Results have been presented at international conferences and published on a peer reviewed journal.