# 13th Vienna Conference on Instrumentation - VCI2013

11-15 February 2013
Vienna University of Technology
Europe/Vienna timezone

## Development of Pixelated Scintillaton Detector for Highly Precise Timing Measurement in MEG Upgrade

Not scheduled
50m
Vienna University of Technology

#### Vienna University of Technology

Gußhausstraße 25-29, 1040 Wien (Vienna), Austria
Board: 7
Poster Scintillating Detectors

### Speaker

Prof. Wataru Ootani (ICEPP, University of Tokyo)

### Description

The MEG experiment is searching for the lepton flavour decay, $\mu^+ \to e^+ \gamma$, with an unprecedented sensitivity. We plan to upgrade the experiment to search for the decay down to a branching ratio sensitivity of around $5\times10^{-14}$, which would improve the sensitivity goal of the current experiment by one order of magnitude. A pixelated scintillation detector is under development for the upgraded experiment to significantly improve the positron time measurement. Each segment pixel is a small ultra-fast plastic scintillator plate with silicon photomultiplier (SiPM) readout. A high timing resolution at a level of 30-35\,ps is expected for the signal positron by averaging the positron impact times over multiple hit pixels. The concept and the expected performance of the proposed detector will be presented as well as the R&D status including the performance measured with a prototype of the pixel counter.