Research Interests:

Leading efforts for CAPP’s first microwave Axion Experiment in an ultra-low temperature setup being launched at KAIST (Korea Advanced Institute of Science and Technology) campus in summer of 2015. Overseeing sub-projects including cryogenics, development of high Q-factor resonant cavity with frequency tuning system, and designing RF receiver electronics/DAQ system.

I am currently working on the simulation and implementation of a new idea which significantly reduces coherent betatron oscillation (CBO) and muon losses in the Fermi National Accelerator Laboratory (FNAL) muon g-2 experiment (E989), and the precision tracking simulations for proton electric dipole moment (EDM) experiment at Brookhaven National Laboratory (BNL) and muon g-2/EDM experiment at Japan Proton Accelerator Research Complex (J-PARC). I am also involved in the development of a data acquisition system for the axion experiment in our group. I am interested in application of high performance computing for physics researches as well.

Yun is developing a new magnetometry experiment to search for axion-like spin-dependent interactions between nuclei at sub-millimeter ranges in ARIADNE collaboration. The experiment involves a rotating non-magnetic mass to source the axion field, and a dense gaseous ensemble of laser-polarized 3He nuclei to detect the axion field by NMR. Yun is also working on a novel experimental scheme enabling the investigation of transient exotic spin couplings to stable topological defects (e.g., domain walls) of axion-like fields with collaboration in GNOME project.