First tests of "bulk" MICROMEGAS with resistive cathode mesh

TL;DR

This paper reports the initial testing of a novel MICROMEGAS detector with a resistive cathode mesh, which aims to improve spark protection while maintaining standard operation.

Contribution

It introduces a new resistive cathode mesh in bulk MICROMEGAS technology and demonstrates its spark mitigation capabilities.

Findings

Resistive mesh reduces spark currents effectively.

Detector operates normally with added spark protection.

First successful tests of resistive cathode in bulk MICROMEGAS.

Abstract

We present the first results from tests of a MICROMEGAS detector manufactured using the so-called "bulk" technology and having a resistive cathode mesh instead of the conventional metallic one. This detector operates as usual MICROMEGAS, but in the case of sparks, which may appear at high gas gains, the resistive mesh reduces their current and makes the sparks harmless. This approach could be complementary to the ongoing efforts of various groups to develop spark-protected MICROMEGAS with resistive anode planes.