Speaker
Jan Kopfer
(Universität Wuppertal)
Description
The Compressed Baryonic Matter experiment, CBM, is being built at the Facility for Antiproton and Ion Research, FAIR, at Darmstadt. The goal is to investigate the QCD phase diagram in particular in the region of high net baryonic density, using heavy ion collisions in a fixed target experiment at beam energies ranging from 8 to 45 GeV/nucleon. The high beam intensity and -quality of the SIS300 accelerator (SIS100 in the first step), together with a detector concept optimized for high event rate capability, allow to achieve exceptional high luminosities (reaction rates up to 10 MHz) and to study in particular rare probes.
Of particular interest are dilepton probes originating from decays of charmonium and light vector mesons, such as rho/omega -> e+ e-/ mu+ mu-. These dilepton probes do not interact hadronically with the dense medium and as such allow to probe the early, high density phase of the fireball evolution.
In the CBM detector setup, a Ring Imaging Cherenkov Detector (RICH) will be used to provide clean separation of electrons from pions, and together with additional layers of Transition Radiation Detectors (TRD) to achieve pion suppression factors up to 4 orders of magnitude. The RICH detector will consist of a CO2 gas radiator volume, a spherical focusing mirror, and multi-anode PMTs (ca 55k individual channels) for detection of Cherenkov photons. A major step in the detector development was the test of a quasi full-scale prototype of the RICH detector at CERN in autumn 2011. Valuable information on the ring image resolution, the photon statistics, the MAPMT readout, and the overall operation was obtained.
We report on the design and status of the RICH detector development, and in particular on the beam time results obtained with the RICH prototype.
Primary author
Jan Kopfer
(Universität Wuppertal)
Co-authors
Christian Pauly
(Universität Wuppertal)
Christina Dritsa
(Justus-Liebig-Universität Gießen)
Claudia Hoehne
(Justus-Liebig-Universität Gießen)
Dmytro Kresan
(Justus-Liebig-Universität Gießen)
Elena Lebedeva
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Evgenii Roshchin
(Petersburg Nuclear Physics Institute)
Evgeniy Vznuzdaev
(Petersburg Nuclear Physics Institute)
In-Kwon Yoo
(Pusan National University)
Ines Galm
(Hochschule Esslingen)
Jahangir Pouryamout
(Universität Wuppertal)
Jihye Song
(Pusan National University)
Julian Rautenberg
(Universität Wuppertal)
Jungyu Yi
(Pusan National University)
Jurgen Eschke
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Karl-Heinz Kampert
(Universität Wuppertal)
Leonid Kotchenda
(Petersburg Nuclear Physics Institute)
Marat Vznuzdaev
(Petersburg Nuclear Physics Institute)
Michael Duerr
(Hochschule Esslingen)
Peter Kravtsov
(Petersburg Nuclear Physics Institute)
Sascha Reinecke
(Universität Wuppertal)
Semen Lebedev
(Justus-Liebig-Universität Gießen)
Tariq Mahmoud
(Justus-Liebig-Universität Gießen)
Vladimir Samsonov
(Petersburg Nuclear Physics Institute)
Vladislav Dobyrn
(Petersburg Nuclear Physics Institute)
