Basic R&D of the long calorimeter using a new material for the future experiment of K0 rare decay

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400293
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Yamagata University
• Principal Investigator: Yoshida Hiroshi 山形大学, 基盤教育院, 教授 (80241727)
• Research Collaborator: TAJIMA Yasuhisa 山形大学, 基盤教育院, 准教授 (50311577) ; SASAKI Miki 山形大学, 大学院理工学研究科, 博士前期課程 ; SEKI Yuuto 山形大学, 大学院理工学研究科, 博士前期課程 ; IWASA Miwa 山形大学, 大学院理工学研究科, 博士前期課程 ; SAKURAI Terutaka 山形大学, 理学部
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 粒子線検出器 / カロリメーター

Outline of Final Research Achievements

In the future plan of the K0 rare decay experiment J-PARC E14 STEP 2, the barrel veto counter must have the length over 15m in order to cover the whole decay area of the neutral kaons. To construct the barrel veto counter as a sandwich calorimeter, we made basic R&D on scintillator and optical devices. Especially, we explored the possibility of a new plastic scintillator "Scintirex" made of polyethylene naphthalate (PEN) as a component of sandwich calorimeter. We made a prototype sampling calorimeter which consists of alternate layers of lead plate (2mm) and Scintrex plate (1mm x 5) and has radiation length of 7.5X0. It was tested by using positron beam of the incident energy ranging from 100 to 800 MeV at ELPH. The obtained data shows that the test counter has good linear response and good energy resolution.

Free Research Field

数物系科学