The discrimination capabilities of Micromegas detectors at low energy

F.J. Iguaz (1); T. Dafni (2); E. Ferrer-Ribas (1); J. Gal\'an (1),; J.A. Garc\'ia (2); A. Gardikiotis (3); I. Giomataris (1); I.G. Irastorza (2),; J.P. Mols (1); T. Papaevangelou (1); A. Rodr\'iguez (2); A. Tom\'as (2); T.; Vafeiadis (3; 4; 5); C. Yildiz (6) ((1) Centre d'\'Etudes Nucl\'eaires de; Saclay; (2) Laboratorio de F\'isica Nuclear y Astropart\'iculas; (3); University of Patras; (4) European Organization for Nuclear Research; (5); Aristotle University of Thessaloniki; (6) Do\u{g}u\c{s} University)

arXiv:1110.2643·physics.ins-det·October 13, 2011·2 cites

The discrimination capabilities of Micromegas detectors at low energy

F.J. Iguaz (1), T. Dafni (2), E. Ferrer-Ribas (1), J. Gal\'an (1),, J.A. Garc\'ia (2), A. Gardikiotis (3), I. Giomataris (1), I.G. Irastorza (2),, J.P. Mols (1), T. Papaevangelou (1), A. Rodr\'iguez (2), A. Tom\'as (2), T., Vafeiadis (3, 4, 5)

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TL;DR

This paper evaluates the low-energy discrimination capabilities of Micromegas detectors, highlighting their suitability for dark matter detection through detailed analysis of two detector types and their operational performance.

Contribution

It provides a comparative analysis of microbulk and bulk Micromegas detectors' performance in low-energy applications for dark matter experiments.

Findings

01

Microbulk and bulk Micromegas show different gain and energy resolution characteristics.

02

Detectors demonstrate effective discrimination of low-energy photons.

03

Operational conditions significantly influence detector performance.

Abstract

The latest generation of Micromegas detectors show a good energy resolution, spatial resolution and low threshold, which make them idoneous in low energy applications. Two micromegas detectors have been built for dark matter experiments: CAST, which uses a dipole magnet to convert axion into detectable x-ray photons, and MIMAC, which aims to reconstruct the tracks of low energy nuclear recoils in a mixture of CF4 and CHF3. These readouts have been respectively built with the microbulk and bulk techniques, which show different gain, electron transmission and energy resolutions. The detectors and the operation conditions will be described in detail as well as their discrimination capabilities for low energy photons will be discussed.

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Taxonomy

TopicsDark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research · Particle Detector Development and Performance