Author/Authors :
L.A.T. Bauerdick، نويسنده , , L.A.T. and Borsato، نويسنده , , E. and Burgard، نويسنده , , C. and Carli، نويسنده , , T. and Carlin، نويسنده , , R. and Casaro، نويسنده , , M. and Chiochia، نويسنده , , V. and Dal Corso، نويسنده , , F. and Dannheim، نويسنده , , D. and Garfagnini، نويسنده , , A. and Kappes، نويسنده , , A. and Klanner، نويسنده , , R. and Koffeman، نويسنده , , E. and Koppitz، نويسنده , , B. and Kِtz، نويسنده , , U. and Maddox، نويسنده , , E. and Milite، نويسنده , , M. Nuebler-Moritz، نويسنده , , M. and Ng، نويسنده , , J.S.T. and Petrucci، نويسنده , , M.C. Bermudo Redondo، نويسنده , , I. and Rautenberg، نويسنده , , J. and Tiecke، نويسنده , , H. and Turcato، نويسنده , , M. and Velthuis، نويسنده , , J.J. and Weber، نويسنده , , A.، نويسنده ,
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.
