Hadronic particle identification (PID) in the barrel region of the PANDA experiment at the new Facility for Antiproton and Ion Research in Europe (FAIR) at GSI, Darmstadt will be provided by a DIRC (Detection of Internally Reflected Cherenkov light) counter. To optimize the performance and reduce the detector cost, detailed simulations of different design elements, such as the width of the radiators, the shape of the expansion volume, and the type of focusing system, were performed using Geant. Custom reconstruction algorithms were developed to match the detector geometry. We will discuss the single photon resolution and photon yield as well as the PID performance for the Barrel DIRC baseline design and several detector design options.
The PANDA experiment at the new Facility for Antiproton and Ion Research in Europe (FAIR) at GSI, Darmstadt, will study fundamental questions of hadron physics and QCD using high-intensity cooled antiproton beams with momenta between 1.5 and 15 GeV/c. Efficient Particle Identification for a wide momentum range and the full solid angle is required for reconstructing the various physics channels of the PANDA program. Hadronic Particle Identification in the barrel region of the detector will be provided by a DIRC counter. The design is based on the successful BABAR DIRC with important improvements, such as focusing optics and fast photon timing. Several of these improvements, including different radiator geometries and optics, were tested in particle beams at GSI and at CERN. The evolution of the conceptual design of the PANDA Barrel DIRC and the performance of complex prototypes in test beam campaigns will be discussed.
The PANDA detector at the international accelerator Facility for Antiproton and Ion
Research in Europe (FAIR) addresses fundamental questions of hadron physics. Experiments concerning
charmonium spectroscopy, the search for hybrids and glueballs and the interaction of hidden
and open charm particles with nucleons and nuclei will be performed with antiproton beams
impinging on hydrogen or nuclear targets. Cooled beams allow the precision scan of resonances in
formation experiments. The momentum range of the antiproton beam between 1.5 GeV/c and 15
GeV/c tests predictions by perturbation theory and will reveal deviations originating from strong
QCD. An excellent hadronic particle identification will be accomplished by DIRC (Detection of
Internally Reflected Cherenkov light) counters. The design for the barrel region is based on the successful
BABAR DIRC with several key improvements, such as fast photon timing and a compact
imaging region. DIRC designs based on different radiator geometries with several focusing options
were studied in simulation. The performance of each design was characterized in terms of photon
yield and single photon Cherenkov angle resolution. Selected design options were implemented in
prototypes and tested with hadronic particle beams at GSI and CERN.
The PANDA detector at the international accelerator Facility for Antiproton and Ion Research
in Europe (FAIR) addresses fundamental questions of hadron physics. An excellent hadronic
particle identification (PID) will be accomplished by two DIRC (Detection of Internally Reflected
Cherenkov light) counters in the target spectrometer. The design for the barrel region covering polar
angles between 22deg to 140deg is based on the successful BABAR DIRC with several key improvements,
such as fast photon timing and a compact imaging region. The novel Endcap Disc DIRC
will cover the smaller forward angles between 5deg (10deg) to 22deg in the vertical (horizontal) direction.
Both DIRC counters will use lifetime-enhanced microchannel plate PMTs for photon detection in
combination with fast readout electronics. Geant4 simulations and tests with several prototypes
at various beam facilities have been used to evaluate
The Barrel DIRC Detector for the PANDA Experiment at FAIR
R. Dzhygadlo, A. Ali, A. Belias, A. Gerhardt, K. Götzen, G. Kalicy, M. Krebs, D. Lehmann, F. Nerling, M. Patsyuk, K. Peters, G. Schepers, L. Schmitt, C. Schwarz, J. Schwiening, M. Traxler, M. Zühlsdorf, M. Böhm, A. Britting, W. Eyrich, A. Lehman, M. Pfaffinger, F. Uhlig, M. Dueren, E. Etzelmueller, K. Föhl, A. Hayrapetyan, K. Kreutzfeld, B. Kröck, O. Merle, J. Rieke, M. Schmidt, T. Wasem, P. Achenbach, M. Cardinali, M. Hoek, W. Lauth, S. Schlimme, C. Sfienti, and M. Thiel
Charged particle identification in the barrel region of the PANDA target spectrometer will be delivered by a Barrel DIRC detector. The design of the Barrel DIRC has been developed using Monte-Carlo simulation and validated with a full-scaled prototype in particle beams. It features the narrow radiators made of synthetic fused silica, focusing optics with 3-layer spherical lenses, and a compact prism-shaped expansion volume instrumented with MCP-PMTs.