Study of Hybrid MicroPattern Gas Detector with CsI Photocathode For Super Tau-Charm Factory RICH

TL;DR

This paper presents the design, testing, and performance analysis of a hybrid micro-pattern gas detector with a CsI photocathode for use in the RICH detector of the future Super Tau-Charm Factory, demonstrating stable operation and promising resolution.

Contribution

It introduces a novel hybrid detector architecture with CsI photocathode for RICH applications and provides experimental performance data from a prototype test.

Findings

Stable operation at 10^5 effective gain

Successful testing of a 16x16 cm^2 prototype at DESY

Analysis of angular resolution and systematic errors

Abstract

Super tau-Charm facility(STCF) is a future electron-position collider operating at tau-Charm energy region aimed to study hadron structure and spectroscopy. The baseline design of the STCF barrel particle identification(PID) detector in the momentum range up to 2 GeV/c is provided by a Ring Imaging Cherenkov Counter(RICH). The architecture of the RICH is an approximately focusing design with liquid perfluorohexane sealed in the quartz container as radiator and a hybrid combination of a CsI coated layers of THGEMs and a Micromegas as the photo-electron detector. A 16*16 cm^2 prototype with quartz radiator has been built and tested at DESY. It was stably operated with 10^5 effective gain. In this paper, the design, the performance, the reconstruction algorithm and the systematic error for single photon electron angular resolution in the aspect of RICH detectors are discusses.