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First polarised light with the NIKA camera

Ritacco, A., Adam, R., Adane, A., Ade, Peter A. R., Andre, P., Beelen, A., Belier, B., Benoit, A., Bideaud, A., Billot, N., Bourrion, O., Calvo, M., Catalano, A., Coiffard, G., Comis, B., D'Addabbo, A., Desert, F-X., Doyle, Simon, Goupy, J., Kramer, C., Leclercq, S., Macias-Perez, J. F., Martino, J., Mauskopf, Philip Daniel, Maury, A., Mayet, F., Monfardini, A., Pajot, F., Pascale, Enzo, Perotto, L., Pisano, Giampaolo, Ponthieu, N., Rebolo-Iglesias, M., Reveret, V., Rodriguez, L., Savini, Giorgio, Schuster, K., Sievers, A., Thum, C., Triqueneaux, S., Tucker, Carole and Zylka, R. 2016. First polarised light with the NIKA camera. Journal of Low Temperature Physics 184 (3) , pp. 724-732. 10.1007/s10909-015-1340-8

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Abstract

NIKA is a dual-band camera operating with 315 frequency multiplexed LEKIDs cooled at 100 mK. NIKA is designed to observe the sky in intensity and polarisation at 150 and 260 GHz from the IRAM 30-m telescope. It is a test-bench for the final NIKA2 camera. The incoming linear polarisation is modulated at four times the mechanical rotation frequency by a warm rotating multi-layer half- wave plate. Then, the signal is analyzed by a wire grid and finally absorbed by the lumped element kinetic inductance detectors (LEKIDs). The small time constant (\(<\)1 ms ) of the LEKIDs combined with the modulation of the HWP enables the quasi-simultaneous measurement of the three Stokes parameters I, Q, U, representing linear polarisation. In this paper, we present the results of recent observational campaigns demonstrating the good performance of NIKA in detecting polarisation at millimeter wavelength.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Millimeter, astronomy, Polarisation, KIDs, NIKA
Publisher: Springer
ISSN: 0022-2291
Date of Acceptance: 22 September 2015
Last Modified: 09 Jul 2019 14:49
URI: http://orca-mwe.cf.ac.uk/id/eprint/94227

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