Design and studies of thick Gas Electron Multipliers fabricated in India

TL;DR

This paper reports on the design, fabrication, and characterization of thick Gas Electron Multipliers (THGEMs) made in India, including simulations and experimental results with different gas mixtures.

Contribution

First fabrication and experimental study of locally produced THGEMs with and without rims, including detailed performance characterization.

Findings

High effective gain achieved in both THGEM types

Optimized operating ranges identified for different gas mixtures

Comparable performance to international standards for THGEMs

Abstract

THick Gas Electron Multipliers (THGEMs) are robust and high gain Micro Pattern Gaseous Detectors which are economically manufactured by standard drilling and etching of thin printed circuit boards. In this paper, we present our recent simulation as well as experimental studies on THGEMs which have been fabricated in India using local expertise. Two types of THGEMs have been fabricated; one set has holes without any external rim and another set has holes with rims. These detectors have been characterized using argon-carbon dioxide and argon-isobutane gas mixtures. Electron transmission, effective gain, energy resolution and optimized working range studies have been presented for both the sets of THGEMs.