An Open Source, FPGA-based LeKID readout for BLAST-TNG: Pre-flight Results

TL;DR

This paper introduces a highly multiplexed, FPGA-based LeKID readout system designed for large superconducting detector arrays, demonstrating its application in the upcoming BLAST-TNG mission to enhance sub-millimeter astronomical observations.

Contribution

It presents the first implementation of a microwave multiplexing readout with LeKID arrays in a space-like environment, advancing technology readiness levels for future space missions.

Findings

Successful demonstration of the readout system on BLAST-TNG

First use of LeKID arrays with microwave multiplexing in a space-like environment

Improved detector and readout performance for future missions

Abstract

We present a highly frequency multiplexed readout for large-format superconducting detector arrays intended for use in the next generation of balloon-borne and space-based sub-millimeter and far-infrared missions. We will demonstrate this technology on the upcoming NASA Next Generation Balloon-borne Large Aperture Sub-millimeter Telescope (BLAST-TNG) to measure the polarized emission of Galactic dust at wavelengths of 250, 350 and 500 microns. The BLAST-TNG receiver incorporates the first arrays of Lumped Element Kinetic Inductance Detectors (LeKID) along with the first microwave multiplexing readout electronics to fly in a space-like environment and will significantly advance the TRL for these technologies. After the flight of BLAST-TNG, we will continue to improve the performance of the detectors and readout electronics for the next generation of balloon-borne instruments and for use in a future FIR Surveyor.