Who: Alicia Gomez
Place: Donostia International Physics Center
Date: Friday, 30 November 2018, 12:00
Future cosmic microwave background (CMB) experiments will be focused on the study of the B-mode signal, which requires large number of detectors, very good sensitivity and polarization selectivity. Kinetic Inductance Detectors (KIDs) , based on superconducting resonators, are the ideal candidates to be used in this type of experiments as they exhibit very good sensitivity and they are intrinsically multiplexable which allows to couple thousands of pixels to a single transmission line. However, further developments are still needed for its use in future space missions. Among them, the development of new materials for the detection of lower frequencies and the design of new geometries for improving the polarization sensitivity are two key aspects that should be improved.
In this work, I will briefly review the
principle of operation of a KID based on the BCS theory. Also, I will present our efforts on developing this type of
superconducting detectors which includes nanofabrication and low temperature
characterization. Finally, I will present our collaboration in the NIKA2 camera
 installed at the 30 m telescope of IRAM-Granada and the KISS spectrometer
to be installed in the following months in the QUIJOTE telescope in Tenerife.
1 Day P.K et al. Nature 2003, 425, 817-821.
2 P. de Bernardis et al. Journal of Cosmology and Astroparticle Physics 2018, 04, 015.
3 M. Calvo et al., J. Low Temp. Phys. 2016, 184, 816.