Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster - Instrumentation I

HK 52.14: Poster

Wednesday, March 6, 2013, 16:45–19:00, HSZ 2.OG

Mechanical integration of the Prototype of the CBM Micro Vertex Detector* — •Tobias Tischler, Michal Koziel, Christian Müntz, and Joachim Stroth — Goethe Universität, Frankfurt

For the reconstruction of Open Charm Hadrons with the CBM experiment a Micro Vertex Detector (MVD) with an excellent resolution of the secondary decay vertex (<70 µm along the beam axis) is required. To achieve this vertex resolution a material budget of a few 0.1% X₀ is mandatory for the individual detector stations positioned downstream in close vicinity to the target. To further reduce the multiple scattering the MVD operates in vacuum.

The need of prototyping and characterizing the CBM-MVD motivated the construction of an ultra-low mass, high precision detector setup comprising several prototype stations. Each station contains 2 (single-sided station) or 4 (double-sided station) 50 µm thick thinned CMOS sensors (MIMOSA-26 AHR). The sensors are glued to CVD diamond carriers which provide at the same time a mechanical support and efficient heat evacuation.
This contribution presents the in-beam performance of the prototype stations, with emphasis on the doubled-sided, ultra-thin (0.3% x/X₀) micro-tracking station which was tested at CERN SPS in November 2012.
*supported by HIC for FAIR, the GSI Helmholtzzentrum für Schwerionenforschung, BMBF grants 06FY9100I and 06FY7114I, IPHC, Strasbourg