Status of the Micromegas semi-DHCAL

TL;DR

This paper reviews the development and testing of a semi-digital hadronic calorimeter prototype using Micromegas chambers, highlighting design, performance, and simulation studies for improved particle flow calorimetry at the ILC.

Contribution

It presents the design, fabrication, and characterization of 1 m2 Micromegas chambers with embedded electronics for semi-digital calorimetry, including initial performance results and simulation insights.

Findings

Micromegas chambers are suitable for semi-digital hadronic calorimetry.

Prototype boards with integrated electronics show promising performance.

Simulation studies indicate performance gains with multiple thresholds.

Abstract

The activities towards the fabrication and test of a 1 m3 semi-digital hadronic calorime- ter are reviewed. The prototype sampling planes would consist of 1 m2 Micromegas chambers with 1 cm2 granularity and embedded 2 bits readout suitable for PFA calorime- try at an ILC detector. The design of the 1 m2 chamber is presented first, followed by an overview of the basic performance of small prototypes. The basic units composing the 1 m2 chamber are 32 \times 48 cm2 boards with integrated electronics and a micro-mesh. Results of character- ization tests of such boards are shown. Micromegas as a proportional detector is well suited for semi-digital hadronic calorimetry. In order to quantify the gain in perfor- mance when using one or more thresholds, simulation studies are being carried out, some of which will be reported in this contribution.