Dresden 2000 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 13: Postersitzung / Instrumentation und Anwendungen

HK 13.1: Poster

Thursday, March 23, 2000, 10:15–12:45, B 117

Development of a Vertex Detector for the ANKE Spectrometer — •R. Schleichert¹, S. Barsov², I. Lehmann¹, S. Merzliakov³, A. Mussgiller¹, and D. Protic¹ — ¹Institut für Kernphysik, Forschungszentrum Jülich — ²High Energy Physics Department, Petersburg Nuclear Physics Institute — ³Laboratory of Nuclear Problems, JINR / Dubna

For the ANKE spectrometer at COSY-Jülich a vertex detector is under development. For the cluster gas-target, the high luminosity pellet-target and the polarized atomic beam source with its extended target region of a 40 cm storage cell, it will provide near target tracking inside the ultra high vacuum. In this way it is possible to reconstruct the vertex of individual reactions. In addition, the identification of low energy spectator protons will allow to use deuterium as an effective neutron-target in order to study the meson production on neutrons. Based on Si-strip and Si-pad detectors the use of new front-end chips allows to have a self-triggering detector system over a wide dynamic range. The detector setup must be moveable in order to limit the accelerator acceptance at injection and to reach maximum detection acceptance after the adiabatic shrinking of the beam. The detector concept as for vertex and spectator detection will be presented.