New Developments in Gaseous Tracking Chambers

Abstract

We are developing as an LAA project a vertex detector designed to operate at the very high particle rates and radiation levels expected of future high-energy hadron colliders 1,2. The detector is made of an array of hexagonal multidrift modules, each independently providing local reconstructed track segments in space with very good angular resolution (0.5 mrad or better in the radial direction) and two-particle separation (500 μm). Each module has 132 drift cells, constituted by anodes centered in a hexagonal cell of 1.4 mm radius, defined by six cathode wires. The completed tubes are 30 mm in diameter and 80 cm long. Signals are read out from both sides, to get the longitudinal coordinate from the charge ratio.