NIKEL_AMC: Readout electronics for the NIKA2 experiment
O. Bourrion, A. Benoit, J. L. Bouly, J. Bouvier, G. Bosson, M. Calvo,, A. Catalano, J. Goupy, C. Li, J. F. Mac\'ias-P\'erez, A. Monfardini, D., Tourres, N. Ponchant, C. Vescovi
TL;DR
This paper presents the design and performance of the readout electronics for the NIKA2 mm-wave astronomy instrument, enabling high multiplexing of thousands of detectors with improved volume efficiency.
Contribution
It introduces a specialized electronics system for NIKA2, achieving high multiplexing factors and reduced volume compared to previous solutions.
Findings
Multiplexing factors up to 400 detectors per board.
Homogeneous performance across all readout boards.
More than threefold reduction in volume compared to earlier systems.
Abstract
The New Iram Kid Arrays-2 (NIKA2) instrument has recently been installed at the IRAM 30 m telescope. NIKA2 is a state-of-art instrument dedicated to mm-wave astronomy using microwave kinetic inductance detectors (KID) as sensors. The three arrays installed in the camera, two at 1.25 mm and one at 2.05 mm, feature a total of 3300 KIDs. To instrument these large array of detectors, a specifically designed electronics, composed of 20 readout boards and hosted in three microTCA crates, has been developed. The implemented solution and the achieved performances are presented in this paper. We find that multiplexing factors of up to 400 detectors per board can be achieved with homogeneous performance across boards in real observing conditions, and a factor of more than 3 decrease in volume with respect to previous generations.
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