Résumé du preprint DAPNIA-02-409

P. Colas, I.Giomataris, J.Martin, A.Olivier, Ph. Rebourgeard, J. Jeanjean, V. Lepeltier, M. Ronan
Studies of the properties and performances of small-gap wire chambers and Micromegas detectors for LC-TPC readout are presented. Gas amplification, drift and attachment studies, and aging effects are reported for Micromegas devices with several gases and mixtures. Preliminary results on positive ion feedback in a 2T magnetic field are summarized. The design of a Micromegas TPC with fine metallic micromesh structures of different pitches and anode pad readout for testing in a high magnetic field is discussed.


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