Development of Low-Temperature Technologies for QIS Systems

a. Development of Low-Temperature Technologies for QIS Systems Cryogenic QIS systems operating near or below one Kelvin (1 K) are growing in scope and cold mass. Proposals are sought for the development of: (1) 4He/3He hybrid refrigeration systems that can efficiently sink power at both 1 K and mK temperatures; (2) High Density Interconnect (HDI) cables for microwave and RF readouts (frequencies ~1 10 GHz) operating with high bandwidth and low thermal loss at mK temperatures that transition to 1 K temperatures; (3) low-power mechanical actuators that can operate at mK temperatures with low thermal loss; (4) low-noise electrical circuit switches operating at mK temperatures with injected noise at the few-quanta noise level. Questions Contact: John Boger, john.boger@science.doe.gov