Study of detector structure to reduce background of XMASS experiment

Research Project

Project/Area Number	21740165
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Particle/Nuclear/Cosmic ray/Astro physics
Research Institution	The University of Tokyo
Principal Investigator	ABE Ko 東京大学, 宇宙線研究所, 助教 (30401285)
Project Period (FY)	2009 – 2010
Project Status	Completed (Fiscal Year 2010)
Budget Amount *help	¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000) Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000) Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords	暗黒物質 / 液体キセノン / 宇宙線 / 宇宙物理 / 素粒子実験
Research Abstract	To improve sensitivity of XMASS dark matter search experiment, study of structure to reduce remaining background was done. By using observed data newly acquired in XMASS experiment, modification and re-tuning simulation for more realistic estimation was realized. Identification of backgrounds from real data was also realized with this simulation. By taking into account these simulation results, realistic candidate of structure to reduce background was decided.