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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Poster – Instrumentation

HK 53.39: Poster

Donnerstag, 22. März 2012, 14:00–16:00, P Foyer

Investigation of surface homogeneity of mirrors for the CBM-RICH detector and low-mass di-electron feasibility studies* — •Elena Lebedeva — GSI, Darmstadt, Germany

The Compressed Baryonic Matter (CBM) experiment at the future FAIR facility will study compressed nuclear matter at moderate temperature and high net-baryon density. The created matter will among other things be studied via the di-lepton decay channels of rare probes such as low-mass vector mesons. The vector mesons are an ideal tool to study the properties of the medium as they are penetrating probes not interacting with the medium. A clean and efficient identification of lepton pairs is therefore indispensable. The CMB RICH detector is the central di-electron identification detector. It will be operated with CO2 radiator gas, MAPMTs as photodetector and spherical glass mirrors as focussing element. A high quality of the mirrors in terms of reflectivity and surface homogeneity is required. In this contribution D0 measurements to quantify the surface homogeneity will be presented. Furthermore, implementing realistic detector responses, the feasibility of low-mass di-electron measurements will be shown.

*supported by the LOEWE center HIC for FAIR