Electronics and Frequency Multiplexed DAQ Systems for Low-Temperature Experiments

e. Electronics and Frequency Multiplexed DAQ Systems for Low-Temperature Experiments Many HEP experiments are operated in the deep cryogenic regime (10-100 mK) with large numbers of readout channels required. Data acquisition and controls signals from the mK stage out to room temperature require high-fidelity RF signals, extremely low noise, and low thermal load on the cryogenic systems. Applications range from future CMB experiments that will have large focal plane arrays with ~500,000 superconducting detector elements, to axion dark matter searches with similar channel count to reach to high axion masses, to large-scale phonon-based WIMP dark matter searches. Specific areas of interest include: Low-noise cryogenic amplifiers (HEMT, SQUID, Parametric, etc.); High-density cryogenic interconnects for mK to LHe temperature stages; Scalable high-density superconducting interconnects for micro-fabricated superconducting devices; High-frequency superconducting flex circuits; Specialized electronics for processing large numbers of frequency-domain multiplexed RF signals; Wafer processing combining niobium metal and MEMS; Fabrication of miniature, ultra-low loss, superconducting resonator arrays; and Electronic frequency tuning mechanisms for microwave resonators. Questions Contact: Helmut Marsiske, helmut.marsiske@science.doe.gov