An LED-based mapper run at 320 mK successfully identifies which SPT-3G+ MKID resonance belongs to which physical pixel, exposing missing, clashed, and swapped resonators.
RF-ICE: large-scale gigahertz readout of frequency-multiplexed microwave kinetic inductance detectors,
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Development of an MKID frequency-to-pixel LED mapper for SPT-3G+
An LED-based mapper run at 320 mK successfully identifies which SPT-3G+ MKID resonance belongs to which physical pixel, exposing missing, clashed, and swapped resonators.