Background simulation of AMoRE-pilot

by Daehoon Ha (MS Candidate)

Wednesday Nov 16, 2016, 3:10 PM → 3:40 PM Asia/Seoul

119호 (쩨1과학관)

Discoveries of neutrino oscillations prove that neutrino has mass, however abso- lute values of the neutrinos masses are still unknown yet [1] [2]. AMoRE (Advanced Mo-based Rare process Experiment) is an experiment to search neutrino-less double beta decay of 100Mo in CaMoO4 crystal scintillators for finding the absolute mass of neutrino. In order to search for this rare process, the AMoRE requires ultra low radioactive background conditions not only for crystals but also for environments. 
For this reason, AMoRE-Pilot (Prototype of the AMoRE) is currently operating at the Yang-Yang underground laboratory to understand detector performance as well as internal and external backgrounds. The goal of AMoRE-Pilot background level is 1 × 10−2 count/keV/kg/year level. To achieve the ultra low background level, we need to have detailed understanding of the internal background sources inside the crystals, and external backgrounds from the experimental equipment and environment. 
In this thesis, to understand the background of AMoRE-Pilot, simulations of the AMoRE-Pilot was performed by Geant4 simulation package. From the simulations results, total single-hit background rate in region of interest is calculated to be less than 2.09 × 10−3 count/keV/kg/year.

Thesis Advisor: Prof. Hongjoo Kim