2D localization using resistive strips associated to the Micromegas structure

An attractive method of two-dimensional localization based on charge division with Ni–Cr resistive strips has been adapted to a Micromegas detector taking advantage of its high gain. Along the strips, depending on the signal to noise ratio, 1.05 mm–300 μm spatial resolutions (respectively, 0.80–0.23% of the strip length) are obtained with an 3H source. For trajectory reconstruction in magnetic fields, these accuracies could match most of the localization constraints requested for measurements of the non-bending coordinate. In the direction perpendicular to the strips, localizations better than 100 μm could be achieved using the center of gravity of the charges.