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 analysed by a wire grid and finally absorbed by the LEKIDs. The small time constant (< 1ms ) of the LEKID detectors 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 results of recent observational campaigns demonstrating the good performance of NIKA in detecting polarisation at mm wavelength.
@article{arxiv.1508.00747,
title = {First polarised light with the NIKA camera},
author = {A. Ritacco and R. Adam and A. Adane and P. Ade and P. André and A. Beelen and B. Belier and A. Benoît and A. Bideaud and N. Billot and O. Bourrion and M. Calvo and A. Catalano and G. Coiffard and B. Comis and A. D'Addabbo and F. -X. Désert and S. Doyle and J. Goupy and C. Kramer and S. Leclercq and J. F. Macías-Pérez and J. Martino and P. Mauskopf and A. Maury and F. Mayet and A. Monfardini and F. Pajot and E. Pascale and L. Perotto and G. Pisano and N. Ponthieu and M. Rebolo-Iglesias and V. Réveret and L. Rodriguez and G. Savini and K. Schuster and A. Sievers and C. Thum and S. Triqueneaux and C. Tucker and R. Zylka},
journal= {arXiv preprint arXiv:1508.00747},
year = {2016}
}
Comments
7 pages, Proceeding for Journal of Low Temperature Physics