Submitted by g.schepers on Sat, 06/02/2021 - 20:03.
Excellent particle identification (PID) will be essential for the PANDA experiment at FAIR. The Barrel DIRC will separate kaons and pions with at least 3 s.d. for momenta up to 3.5 GeV/c and polar angles between 22 and 140 deg.
After the successful validation of the final design in the CERN PS/T9 beam line, the tendering process for the two most time- and cost-intensive items, radiator bars and MCP-PMTs, started in 2018. In Sep. 2019 Nikon was selected to build the fused silica bars and successfully completed the series production of 112 bar in Feb. 2021. Measurements of the mechanical quality of the bars were performed by Nikon and the optical quality was evaluated at GSI. In Dec. 2020, the contract for the fabrication of the MCP-PMTs was awarded to PHOTONIS and the delivery of the first-of-series MCP-PMTs is expected in June 2021.
We present the design of the PANDA Barrel DIRC as well as the status of the component series production and the result of the quality assurance measurements.
PANDA (antiProton ANnihilation in DArmstadt) is the central experiment to fully exploit the physics research potential of antiproton beams at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR), currently under construction at GSI. Phase-space cooled high intensity antiproton beams up to 15 GeV/c will be provided by the High Energy Storage Ring (HESR) at FAIR to interact with PANDA internal proton or nuclear targets enabling a broad range of exciting studies in Particle and Nuclear Physics. The PANDA detector features two spectrometers, the Target Spectrometer with a superconducting solenoid magnet of 2 T around the interaction region with hermetic coverage and the Forward Spectrometer with a 2 Tm dipole magnet for coverage of the forward boosted particles. Several modern particle detector systems are employed in PANDA to provide excellent charged particle tracking, particle identification, calorimetry and muon detection, over the full momentum range in both spectrometers throughout the lifetime of the experiment. Focusing on the various PANDA detector systems we present an overview of recent developments, the detector construction progress and conclude with an outline for a phased deployment of PANDA at FAIR.
The PANDA experiment (antiProton ANnihilation at DArmstadt) is one of the four key experiments to be operated at FAIR (Facility for Antiproton and Ion Research), which is currently under construction near Darmstadt/Germany. This fixed target experiment will address a wide range of open questions in the field of hadron physics.
The detector consists of at target as well as a forward spectrometer to fully exploit the forward boosted collisions of antiprotons with dense hydrogen or nuclear targets.
Phase-space cooled antiprotons with momenta in the range of 1.5 GeV/c to 15 GeV/c provided by the High Energy Storage Ring (HESR) allow for high precision line-shape scans.
The ability to perform exclusive reconstruction of arbitrary final states enables a physics program including topics such as spectroscopy in the charmonium and open-charm region, proton structure, and hyperon and hypernuclear physics.
The talk will give an overview of the PANDA experiment and highlight the most important aspects of the physics program.
The PANDA Experiment, which is located at the High Energy Storage Ring at the FAIR accelerator
center in Darmstadt, Germany, is optimized for questions of hadron physics.
With this detector it will be possible to discover new states and measure their line shapes as well as the
line shapes of already known states very precisely.
To normalize the energy scan measurements exact knowledge of the luminosity is required.
The luminosity at PANDA will be determined from the angular distribution of elastical antiprotonm
proton scattering. In order to achieve an absolute measuring accuracy of 5% , the tracks of the scattered
antiprotons will be measured by four planes of thinned silicon detectors (HV-MAPS).
HV-MAPS are pixel sensors with integrated readout electronics. They will be operated with a reverse
voltage of 60 volts to increase their radiation hardness.
The four detector planes consist of CVD-diamonds on which the sensors are clued. To reduce the
multiple scattering the detector is operated in a vacuum.
The concept of the luminosity detector is presented and technical aspects such as the vacuum system,
cooling, electronics, and sensors are discussed, as well as insights into data analysis.