Heidelberg 1999 – scientific programme
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T: Teilchenphysik
T 409: Vertexdetektoren
T 409.1: Group Report
Tuesday, March 16, 1999, 16:30–16:55, MA2
The ZEUS Silicon Microvertex Detector — •M. Milite — DESY, Notkestraße 85, 22607 Hamburg
In time with the HERA luminosity upgrade in the year 2000 a high precision vertex detector, based on silicon strip technology, will be installed in the ZEUS experiment. It will lead to a general improvement in the global angular and momentum resolution of the tracking system and will provide the ability to identify events containing secondary vertices from the decay of long-lived particles. The ZEUS microvertex detector will consist of three double layers surrounding the beam pipe in the central region (600 detectors) and 4 wheels in the forward region (112 detectors). Since each silicon plane has 512 readout strips, the total number of readout channels is of the order of 3.6·105. Due to the large coverage of the detector (about 1 m long), the frontend electronics, consisting of HELIX analog chips, will be placed on top of the detectors. Each chip integrates 128 readout channels which are sampled in an analog pipeline with the HERA bunch crossing frequency (10.4 MHz). In this talk the physics motivation and the status of the project will be presented.