MICROMEGAS chambers for hadronic calorimetry at a future linear collider

C. Adloff , D. Attie , J. Blaha , S. Cap , M. Chefdeville , P. Colas , A. Dalmaz , C. Drancourt

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A. Espargiliere R. Gaglione R. Gallet N. Geffroy I. Giomataris J. Jaquemier Y. Karyotakis F. Peltier J. Prast G. Vouters

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classification ⚛️ physics.ins-det hep-ex

keywords beenchambersmicromegasreadouttestedbulkmeasurementspresented

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Prototypes of MICROMEGAS chambers, using bulk technology and analog readout, with 1x1cm2 readout segmentation have been built and tested. Measurements in Ar/iC4H10 (95/5) and Ar/CO2 (80/20) are reported. The dependency of the prototypes gas gain versus pressure, gas temperature and amplification gap thickness variations has been measured with an 55Fe source and a method for temperature and pressure correction of data is presented. A stack of four chambers has been tested in 200GeV/c and 7GeV/c muon and pion beams respectively. Measurements of response uniformity, detection efficiency and hit multiplicity are reported. A bulk MICROMEGAS prototype with embedded digital readout electronics has been assembled and tested. The chamber layout and first results are presented.

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MICROMEGAS chambers for hadronic calorimetry at a future linear collider

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