Micromegas Detector

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Modeling Large Families Based on Gaseous Mixtures

Recent years have seen the development of many fields of gas detectors.

The Multi-Wire Proportional Chamber (MWPC) and MICROMEGAS (Micro-Mesh Gas Structure) appeared successively as the very promising detectors.

They are major families of position detectors in High Energy Physics, detect and localize energy deposit by charged particles over large area.

In this work, MATLAB simulations of This Detectors are represented.

The aim of this work is to simulate the potential and electric field distribution in (MWPC), to clarify the phenomenon of induction of signals in the electrodes.

Initially, we focus on electronic and ionic currents induced, then; we will calculate the total charge induced.

We choose Argon-isobutane(Ar-iC4H10) and Argon-dimethyl-ether (DME) gas mixture, using 55Fe radioactive 5.9keV X-rays Source.

In the normal condition, (T=298k, p=1atm), we simulate the temporal structure of the current signal, and the contribution of the total charge induced.

The pre-amplified signal is evaluated.

These results are compared to other results published.

We remark the dependence of the output signal of MICROMEGAS detector and improving the performance of this detector.

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