Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 49: Electronics, Trigger, DAQ II

T 49.1: Vortrag

Mittwoch, 18. März 2026, 16:15–16:30, KH 00.023

Readout Electronics for the ECHo-LE Experiment — •Timo Muscheid, Robert Gartmann, Daniel Crovo, Matthias Balzer, and Luis Ardila-Perez for the ECHo collaboration — Karlsruhe Institute of Technology, Karlsruhe, Germany

Precise knowledge of the neutrino mass is crucial for solving fundamental questions in the Standard Model of Particle Physics. The ECHo collaboration aims to further limit the electron neutrino mass by analyzing the electron-capture spectrum of Holmium-163. ECHo-100k employs 10,000 detectors with a total activity of 100 kBq to improve energy resolution through increased measurement statistics. For operation of these microwave-SQUID-multiplexed pixels a custom Software-defined radio (SDR) system has been developed. This system is responsible for stimulating the resonators in the 4-8 GHz band, frequency demultiplexing and flux-ramp demodulation of the carrier tones as well as online data rate reduction. The next phase, ECHo-LE, will further increase the pixel count to 20,000 across 25 cryogenic readout lines. The room-temperature readout system will be based on the existing SDR electronics from ECHo-100k, completed by 10 additional modules. Firmware development will continue, focusing on enhanced capabilities such as tone-tracking, which promises to reduce distortion and intermodulation. In this contribution, we will present the proposed hardware architecture and firmware concept of the ECHo-LE room-temperature readout electronics. We discuss potential hardware upgrades and new firmware features of the SDR, highlighting their importance for meeting the high demands of the experiment.

Keywords: cryogenic detectors; microwave-SQUID-multiplexer; data acquisition systems; software-defined radio