[9a-A24-1~12] 11.3 Analog applications and their related technologies

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[9a-A24-5] Investigation of Phonon Propagation Models in Superconducting Detectors for Reducing Position Dependence

〇RIKU ANZAI¹, Masato Naruse¹, Hiroaki Myoren¹ (1.Saitama Univ.)

Keywords:

Lumped Element Kinetic Inductance Detector,Phonon propagation,Superconducting detector

To improve the energy resolution of Lumped Element Kinetic Inductance Detectors (LEKIDs) for applications such as dark matter searches, we investigated the phonon propagation models in the substrate, which cause position-dependent responses. We calculated virtual pulse heights by combining electromagnetic simulations of the current density distribution with various phonon attenuation models (e.g., 1/r geometric attenuation and exponential absorption at the interface). By comparing the simulated histograms with measured data, we evaluated the validity of each model. In this presentation, we will discuss these comparisons and the prospects for constructing a more detailed phonon transport model to further reduce position dependence.