Author/Authors :
Colas، نويسنده , , P. and Colijn، نويسنده , , A.P. and Fornaini، نويسنده , , A. and Giomataris، نويسنده , , Y. and van der Graaf، نويسنده , , H. and Heijne، نويسنده , , E.H.M. and Llopart، نويسنده , , X. and Schmitz، نويسنده , , J. and Timmermans، نويسنده , , J. and Visschers، نويسنده , , J.L.، نويسنده ,
Abstract :
We have applied the Medipix2 pixel CMOS chip as direct anode readout for a TPC. For the gas amplification two options have been investigated: (i) a three-stage GEM system and (ii) a Micromegas mesh. The structure of the cloud of primary electrons, left after interactions of 55 Fe quanta with the gas is visible with unprecedented precision. This proof-of-principle is an essential step in our project to realize a monolithic pixel sensor with integrated Micromegas, to be developed specially for the readout of TPCs, and applicable for drift chambers in general.
Keywords :
GEM , Micromegas , Medipix2 , TPC , pixel , Pixel-segmented anode
