Speaker
Description
State-of-the-art cosmic microwave background (CMB) telescopes must deploy receivers with a high density of superconducting detectors. Reading out these detectors while maintaining cryogenic conditions requires novel multiplexing schemes. Microwave superconducting quantum interference device multiplexing has been shown to achieve multiplexing factors on the order of 1,000, which is a drastic improvement over previous technologies. Non-linear and time-variable crosstalk between detectors due to this readout system, however, may introduce a new systematic CMB map-level effect. As this readout system has recently been deployed to the Simons Observatory to enable the readout of its more than 60,000 detectors located at 5,200 m on Cerro Toco in Chile’s Atacama Desert, it is necessary to characterize the potential biases from a systematic crosstalk effect. This contribution will present large-scale simulations of this crosstalk effect in the Simons Observatory large-aperture telescope (LAT), which contains more than 30,000 of the observatory’s detectors. The weak lensing signal from the LAT will unlock a wealth of information about the Universe by measuring the growth of structure, constraining cosmological parameters, and limiting the sum of the masses of neutrinos. These simulations will be used to better understand necessary crosstalk mitigation techniques for reconstructing the CMB’s weak lensing power spectrum as measured by this new instrument so that its science goals are achieved.
| Would you be interested in presenting a poster if the conference is oversubcribed? | Yes |
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