Multi-wavelength polarization observations at different angular resolutions are fundamental to probe a number of astrophysical processes from galactic to cosmological scales. In particular​dust polarization measurements at intermediate and high angular resolution of filamentary regions in our galaxy are the key to disclose the role of the magnetic fields played in the star formation process​. On the other hand the search for the ​cosmic microwave background (CMB) polarization B-modes signal, to unveil the primordial universe, drives the motivation of technological developments and advances in data analysis techniques.
The measurement of these very weak polarization signals requires an unprecedented sensitivity, and control of the systematic effects generated by the instruments, as well as a very precise calibration.
In this seminar I will overview the progress in the field to overcome these difficulties in the context of the NIKA2 camera, which observes from the IRAM 30m telescope in Spain, and also the development of the future satellite LiteBIRD.

Brief CV of Dr. Alessia Ritacco:

Born in Calabria, Alessia moved to Rome to study astrophysics at La Sapienza University obtaining the master degree in experimental cosmology in fall 2012. In 2013 she moved to Grenoble for a PhD thesis funded by the french space agency (CNES). Here she worked on a state of art technology for the detection of the sky millimeter polarization through the NIKA/NIKA2 camera installed at the IRAM 30m telescope located in Spain. In 2017 she started a  post doc at the IRAM 30m observatory to carry out the start of NIKA2 open time observations and the commissioning of the final polarimeter. In fall 2019 she moved to Paris to work on the development of the medium-high-frequency telescope for the LiteBIRD satellite and the behavior of the dust polarization SED spatial variation as foreground for the CMB polarization B-modes detection.