Speaker
Jan Kopfer
(University Wuppertal)
Description
The Compressed Baryonic Matter (CBM) experiment at the Facility for Antiproton and Ion Research (FAIR) will explore the phase diagram of nuclear matter at very high net-baryon densities and moderate temperatures. It is designed for operation in fixed target mode to study ultrarelativistic nucleus-nucleus collisions at beam energies up to 45 AGeV with unprecedented statistical precision.
An important CBM observable are light vector mesons and charmonium which are experimentally accessible via their decay into lepton pairs. Those are ideal probes of the early, high-density phase of the collision process due to their lack of strong interaction with the hot and dense medium. The measurement of such rare probes requires clean and efficient electron identification which will be provided up to momenta of 8 GeV/c by a gaseous Ring Imaging Cherenkov (RICH) detector. The main challenges are the suppression of pions and the precise control of the background in the high multiplicity environment of a heavy ion collision.
We will present the detector concept developed to meet the requirements and the recent progress in R&D resulting in the CBM-RICH Technical Design Report which has been approved by FAIR in February 2014. Results from in-beam tests with a real-size prototype will be discussed which verify the detector concept and validate the feasibility studies done so far.
| On behalf of collaboration: | CBM |
|---|
Primary author
Jan Kopfer
(University Wuppertal)
