Micromegas for Particle Flow Calorimetry

Gaseous sampling hadron calorimeters can be finely segmented and used to record showers with high spatial resolution. This imaging power can be exploited at a future linear collider experiment where the reconstruction of jets by a Particle Flow method will rely on the tracking capability of the calorimeters. Various detector options for this calorimeter are studied within the CALICE collaboration, among which the micro-mesh gaseous structure or Micromegas. The benefit of Micromegas for digital calorimetry is motivated first, on the basis of a Monte Carlo study. Then, the main features of 1 × 1 m2 prototypes with 2-bit embedded readout electronics are presented, together with some selected results from beamtests inside the CALICE steel RPCSDHCAL.