Abstract
We describe a novel coupled microwave dielectric resonator system (an unusual form of parametric amplifier), which is under development, aimed at realizing a high-resolution single X-ray photon energy detector. Unlike other high-resolution detectors, it operates at a relatively high cryogenic temperature in the range of 7-30 K. Construction of the cooler system and thermal characterization system is completed. All aspects of the novel calorimeter performance have been evaluated, including demonstration of single-particle detection, the required rapid thermal time constant of a coupled resonator, a high df/dT response, and promising development of a low-noise microwave detection system.
Highlights
T HE requirement for more precise measurement of single-particle energies is converging with the needs of quantum technologies, to drive the development of improved cryogenic calorimeters [1]–[4]
There has been considerable development of superconducting quantum interference device (SQUID)-based temperature sensors, in which the temperature dependence of a metallic paramagnetic sample is sensed by an attached SQUID sensor
We describe two coupled microwave dielectric resonators where one resonator is made from a high-permittivity perovskite material, having much smaller size than the other, larger, dielectric resonator
Summary
T HE requirement for more precise measurement of single-particle energies is converging with the needs of quantum technologies, to drive the development of improved cryogenic calorimeters [1]–[4]. We describe two coupled microwave dielectric resonators where one resonator is made from a high-permittivity perovskite material, having much smaller size (and much smaller heat capacity) than the other, larger, dielectric resonator. The latter is made of single-crystal sapphire, with a relatively temperature-stable permittivity of ∼10.5. Fixed frequency bias of the system results in a potentially large change in the output amplitude signal at this frequency
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