Speaker
Description
Muon spin spectroscopy, known as muon spin rotation/relaxation/resonance ($\mu$SR). Through the $\mu$SR technique, the polarization of muons can be accurately measured. Cosmic-ray muons represent secondary particles produced by high-energy cosmic-ray interacting with Earth atmosphere. Cosmic-ray muons as a nature wide energy range muon source, their polarization is an important feature. The research group at Sun Yat-Sen University (SYSU) develops a prototype Cosmic-Ray Muon Spin Spectroscopy (CRmuSR), aiming to measure the polarization of cosmic-ray muons. The system is instrumented with plastic scintillator coupled with SiPM readout by 512 channel electronics. The first round test exhibits a time resolution superior to $2 \mathrm{ns}$. CRmuSR has achieved stable operation for a cumulative time exceeding $500$ hours. Meanwhile, the Geant4 simulation and analysis tool is ready. Preliminary results will be reported in the talk. CRmuSR can help us measure the cosmic-ray muons polarization and explore the feasibility of constructing a $\mu$SR apparatus. In the future, we wish that CRmuSR could be deployed in array and potentially aid in the assessment of low energy cosmic-ray muon properties. Combined analysis with atmospheric neutrinos can be expected.
