NIKEL_AMC: readout electronics for the NIKA2 experiment

Abstract

The New Iram Kid Arrays-2 (NIKA2) instrument has recently been installed at\nthe IRAM 30 m telescope. NIKA2 is a state-of-art instrument dedicated to\nmm-wave astronomy using microwave kinetic inductance detectors (KID) as\nsensors. The three arrays installed in the camera, two at 1.25 mm and one at\n2.05 mm, feature a total of 3300 KIDs. To instrument these large array of\ndetectors, a specifically designed electronics, composed of 20 readout boards\nand hosted in three microTCA crates, has been developed. The implemented\nsolution and the achieved performances are presented in this paper. We find\nthat multiplexing factors of up to 400 detectors per board can be achieved with\nhomogeneous performance across boards in real observing conditions, and a\nfactor of more than 3 decrease in volume with respect to previous generations.\n