Tunable dielectric haloscope for high-mass axion searches | Dr. SungWoo YOUN скачать в хорошем качестве

Tunable dielectric haloscope for high-mass axion searches | Dr. SungWoo YOUN

Dr. SungWoo YOUN Institute for Basic Science Abstract: The axion is a hypothetical elementary particle that could address two fundamental questions in modern physics: the strong CP problem and the dark matter mystery. The cavity-based haloscope, relying on axion-photon conversion under a magnetic field, has offered the most sensitive approach to detect the axion dark matter signal. However, experimental searches have been limited to relatively low masses, benefiting from large detection volumes and high quality factors for a given experimental setup. We propose a new cavity design that features a periodic arrangement of dielectric material in a conventional conducting cavity. The search frequency is determined by the interspace, being decoupled with the cavity volume and thus this two-dimensional lattice structure is suitable for high mass axion searches. In addition, dielectric properties could substantially improve the cavity quality factor, enhancing experimental performance. An auxetic structure is considered to deploy the array for two-dimensional frequency tuning. We present the characteristics of this haloscope design and demonstrate the feasibility for high-mass axion searches. Main paper/arXiv, related to the seminar, and other references: 1. arXiv:2205.08885 0:00 Intro 2:33 Background 20:19 Search strategies 37:51 Tunable dielectric cavity 1:04:14 Summary 1:05:01 Q&A The Department of Physics and Engineering of ITMO University (Saint Petersburg, Russia) hosts online weekly seminars to discuss recent scientific achievements of researchers from all over the world with a wide audience. The topics include experimental (Optical seminar) and theoretical (Theoretical seminar) aspects of nanophotonics, solid-state physics, material science, as well as design and applications of radiofrequency structures and devices (Microwave seminar). Upcoming and past events can be found at https://physics.itmo.ru/en/seminars   / physics.itmo     / physics_itmo     / physics.itmo   #MicrowaveSeminar #ITMO #новыйфизтех #scientificseminar