A Kinetic Inductance Superconducting Parametric Amplifier for Ka-band Dark Matter Detection
ORAL
Abstract
Superconducting Parametric Amplifiers (SPAs) have been the subject of intense study in the past decade due to their high gain and near-quantum-limited noise performance. These characteristics, make them desirable for a variety of applications such as radio astronomy, quantum computing and the search for axion dark matter.
The amplifier presented in this work, is made of a quartz substrate (250 um) coated with 40 nm of NbTi and etched to produce dozens of resonating structures (split-ring resonators) and designed to work in reflection. The resonators have been simulated in Ansys HFSS, with each showing a return loss close to 0 dB — as expected for high-Q reflection resonators — and a quality factor over 20 thousand. The results of the device at sub-K temperatures will be presented and its key role as a first-stage amplifier in a Ka-band axion experiment will be discussed.
The amplifier presented in this work, is made of a quartz substrate (250 um) coated with 40 nm of NbTi and etched to produce dozens of resonating structures (split-ring resonators) and designed to work in reflection. The resonators have been simulated in Ansys HFSS, with each showing a return loss close to 0 dB — as expected for high-Q reflection resonators — and a quality factor over 20 thousand. The results of the device at sub-K temperatures will be presented and its key role as a first-stage amplifier in a Ka-band axion experiment will be discussed.
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Presenters
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Junhong Gu
- Department of Physics and Astronomy, University of Manchester