Beam test of silicon strip sensors for the ZEUS micro vertex detector
/ Authors
L. Bauerdick, E. Borsato, C. Burgard, T. Carli, R. Carlin, M. Casaro, V. Chiochia, F. Corso, D. Dannheim, A. Garfagnini
and 16 more authors
A. Kappes, R. Klanner, E. Koffeman, B. Koppitz, U. Koetz, E. Maddox, M. Milite, M. Moritz, J. Ng, M. C. Petrucci, I. Redondo, J. Rautenberg, H. Tiecke, M. Turcato, J. Velthuis, A. Weber
/ Abstract
Abstract For the HERA upgrade, the ZEUS experiment has designed and installed a high precision Micro Vertex Detector (MVD) using single sided μ -strip sensors with capacitive charge division. The sensors have a readout pitch of 120 μm , with five intermediate strips ( 20 μm strip pitch). An extensive test program has been carried out at the DESY-II testbeam facility. In this paper we describe the setup developed to test the ZEUS MVD sensors and the results obtained on both irradiated and non-irradiated single sided μ-strip detectors with rectangular and trapezoidal geometries. The performances of the sensors coupled to the readout electronics (HELIX chip, version 2.2) have been studied in detail, achieving a good description by a Monte Carlo simulation. Measurements of the position resolution as a function of the angle of incidence are presented, focusing in particular on the comparison between standard and newly developed reconstruction algorithms.
Journal: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment