Development of a spherical-shaped single phase liquid xenon drift calorimeter with proportional scintillation readout

2015 Fiscal Year Final Research Report

• Project/Area Number: 25610054
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: Itow Yoshitaka 名古屋大学, 宇宙地球環境研究所, 教授 (50272521)
• Co-Investigator(Kenkyū-buntansha): MASUDA Kimiaki 名古屋大学, 宇宙地球環境研究所, 准教授 (40173744)
• Research Collaborator: SEKIYA Hiroyuki 東京大学, 宇宙線研究所, 准教授 ; KEGASA Risako 名古屋大学, 理学研究科, 大学院生 ; KANZAWA Kayo 名古屋大学, 理学研究科, 大学院生
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 宇宙線 / 素粒子実験 / 実験核物理 / 放射線 / 低温物性 / 宇宙物理 / 暗黒物質 / 液体キセノン

Outline of Final Research Achievements

We have developed a single phase liquid xenon dark matter detector in which direct scintillation light (S1) and proportional scintillation light (S2) utilized for precise position reconstruction. We have designed electrodes and electric fields designed for a future detector. We have also developed two types of test bench having an anode electrode either with a gold-coated10 micron tungsten-wire or with a electron-gas-multiplier (GEM) in order to measure S1 and S2 in the given range of planed electric fields. In the GEM setup, we tested previous report for observation of S2 signal with GEM in liquid xenon with a few kV for GEM voltage. But no S2 signal was observed with 36kV/cm in GEM.

Free Research Field

宇宙線物理学