Orateur
Description
The ambitious quest to detect the faint B-modes of CMB polarization, pursued by projects like the Simons Observatory (SO) and LiteBIRD, requires rigorous control over systematic effects in polarimetry. The PolarKID project, supported by CNES (2023–2025), is dedicated to testing LEKIDs in a filled array configuration to demonstrate their capability for precise polarization detection. This setup has been used to qualify LEKID in the context of the proposed French SAT for SO (KAIROS project), and also to perform a first characterization of the millimeter source in the context of the COSMOCal project. I will present detailed results on the polarisation angle reconstruction with LEKIDs together with preliminary results of the first COSMOCal qualification measurements in Grenoble and the first campaign at the IRAM 30-meter telescope. During this latter campaign, we successfully tested the first calibrator-telescope interface for large ground-based telescopes. These initial findings highlight COSMOCal’s potential to enhance calibration accuracy, supporting the reliability of measurements essential for upcoming CMB research.
