Detector hardware

Within the FAIR phase-0 project, the use of FAIR equipment at
other facilities before the completion of the civil construction is envis-
aged. The PANDA EMC is a good candidate for FAIR phase-0, due
to the advanced state of its development. In particular, the backward
endcap (BWEC) of the PANDA EMC, which is developed and built at
HIM in Mainz, could be ready by 2020, three years before its foreseen
installation. Therefore, possible experiments at the MAMI electron
beam facility making use of the BWEC are under consideration.
One candidate is the measurement of the π electromagnetic transition
form factor via the electroproduction on a nuclear Coulomb field. To
select this channel, the momentum distribution of the π needs to be
measured by detecting the decay γ particles in an EMC.
Since the relevant γ s are emitted at forward angles, where high par-
ticle fluxes are expected, the affordable luminosity is limited by the
maximum event rate of the detector. Therefore, the total event rate at
different scattering angles with various targets need to be determined.
Monte Carlo simulations are ongoing and a beam test with a prototype
calorimeter was scheduled for January 2018 in order to address these
questions. The status of these feasibility studies will be presented.

We describe the technical layout and the expected performance of the
Barrel Time-of-Flight detector (Barrel TOF) for the PANDA target
spectrometer, giving updates on recent developments. The Barrel TOF
detector has been designed to precisely measure the time at which a
charged particle transits the detector with a resolution superior to the
other sub-detectors. It will signal the topology of physics events, hence
setting cornerstones for event classification. The implementation of the
Barrel TOF is based on very fast organic scintillator tiles coupled to
Silicon Photomultipliers. In total 2000 scintillators and 16k SiPMs will
be used, covering 5 m2. The detector R&D is now in advanced stage
and the technical design report is being reviewed by FAIR council.
The emphasis of this talk will be put on the updated design and
performance of the PCB stripline transmission and fine scans of the
time resolution of the detector elements, continuing the updates for
the B-TOF detector.

The PANDA experiment, is a core project of the future Facility for
Antiproton and Ion Research (FAIR) at GSI in Darmstadt. It will investigate
antiproton proton annihilations on nucleons and nuclei with the aim to explore fundamental
questions in the nonperturbative regime of QCD as the origine of the hadron mass. The multi-purpose
detector is currently under construction. The intense and high quality anti-proton beam will span
the momentum range between 1.5 and 15 GeV/c. The detection of hadrons, leptons, and photons in the final states
will be possible with very high precision. A rich physics program as resonances in the charmonium and open charm region, electromagnetic form factors, hyper nuclear physics will be investigated. The worldwide collaboration gathers today more than 450 physicists from 60 institutions in 19 countries. The talk will give an overview of the PANDA experiment and of the most important aspects of the physics program.
It will focus on the topics that will be investigated as soon as the facility is operational.

PANDA Management Quarterly Report 17Q4

PANDA Management Quarterly Report 17Q2

PANDA Management Quarterly Report 17Q1

The electromagnetic target calorimeter (EMC) \cite{EMC} of the future $\overline{P}ANDA$ detector has the challenging aim to detect high energy photons with excellent energy resolution from 15 GeV down to a few tens of MeV. To reach this goal, improved PbW0$_4$ scintillator crystals, cooled down to $-25^\circ C$ have been chosen. They provide a fast decay time for highest count rates, short radiation length for compactness, improved light yield for lowest thresholds and excellent radiation hardness. The target calorimeter itself is divided into into a barrel and two endcaps. The individual crystal will be read out with two precisely matched large area avalanche photo sensors (APD). In the very inner part of the forward encap vacuum phototetrodes will be used instead.

In this talk the construction and assembly status will be presented. This includes for example the assembly of detector subunits, mechanical support structure, the cooling system, optical monitoring system and front end electronics.

This project is supported by the BMBF.