Development of space-flight compatible room-temperature electronics for the Lynx x-ray microcalorimeter

We are studying the development of space-flight compatible room-temperature electronics for the Lynx x-ray microcalorimeter (LXM) of the Lynx mission. The baseline readout technique for the LXM is microwave SQUID multiplexing. The key modules at room temperature are the RF electronics module and the digital electronics and event processor (DEEP). The RF module functions as frequency converters and mainly consists of local oscillators and I/Q mixers. The DEEP performs demultiplexing and event processing, and mainly consists of field-programmable gate arrays, ADCs, and DACs. We designed the RF electronics and DEEP to be flight ready, and estimated the power, size, and mass of those modules. There are two boxes each for the RF electronics and DEEP for segmentation, and the sizes of the boxes are 13 in. × 13 in. × 9 in. for the RF electronics and 15.5 in. × 11.5 in. × 9.5 in. for the DEEP. The estimated masses are 25.1 kg / box for the RF electronics box and 24.1 kg / box for the DEEP box. The maximum operating power for the RF electronics is 141 W or 70.5 W / box, and for the DEEP box is 615 W or 308 W / box. The overall power for those modules is 756 W. We describe the detail of the designs as well as the approaches to the estimation of resources, sizes, masses, and powers.