Disk Resonator Design for Kinetic Inductance Detectors

Abstract

We propose disk resonators for use as kinetic inductance detectors. Benefits and drawbacks of this design are discussed with consideration for potential detector applications. We have conducted electromagnetic simulations of the resonator geometry and will use them to examine the disk resonator properties. We will compare several schemes for coupling these resonators to feed lines and review the effect of a large kinetic inductance on the design equations for the resonant frequency. Additionally, a strategy to reduce the resonator metal volume by meshing is considered, and its effects on the resonator’s current distribution are shown. We find that meshing can significantly alter the resonant frequency of the disk. We conclude by discussing an example disk resonator, gamma-ray microcalorimeter detector design.