Working Principle
A particle detector is used to detect a passing particle and obtain information such as its position, arrival time and momentum. In experimental physics, the particle is usually coming from a particle accelerator but it can also come from space (cosmic ray) or from a nuclear reactor.
The Micromegas detector, as every gaseous detector, detects particles by amplifying the charges that have been created by ionisation in the gas volume. In a Micromegas detector, this gas volume is divided in two by a metallic micro-mesh (“Micromesh” on the schematic) placed between and of the readout electrode (Strips on the schematic). The micro-mesh is the key element since it allows, at the same time, a high gain of with and a fast signal of 100ns.
Read more about this topic: Micro Megas Detector
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