Poster (POS)

TA-POS-2020-016

Publication title: 

Mechanics and Cooling for the PANDA Luminosity Detector

Publication author: 

Heinrich Leithoff

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Publication date: 

Monday, 24 February, 2020
Submitted by h.h.leithoff on Tue, 14/01/2020 - 21:18.

Publication abstract: 

The PANDA-Experiment will be a fixed target experiment at the future FAIR-accelerator center at Darmstadt, Germany. As the experiment is designed for high precision measurements with an antiproton beam, especially in the charm sector of hadron spectroscopy, a precise knowledge of the luminosity is crucial. The determination of the luminosity will be done by measuring the angular distribution of elastically scattered antiprotons at very small scattering angles between 3 and 8 mrad. Therefore their tracks will measured by four layers of thinned HV-MAPS silicon sensors of 50μm thickness. To minimize the multiple scattering, the measurement is performed in vacuum. As the sensors will dissipate up to 7mW/mm^2, an active cooling is mandatory. To achieve this while maintaining a low material budget, the sensors will be glued on 200 μm thin CVD-diamonds which are clamped in an actively cooled aluminium heatsink outside of the acceptance. An excellent thermal contact to the stainless steel pipe for the coolant is ensured by melting the aluminium around the pipe before machining the heatsink. The poster will present the mechanical design and the cooling system.

TA-POS-2020-012

Publication title: 

Particle Identification Algorithms for the Panda Barrel DIRC

Publication author: 

Ahmed Ali

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Publication date: 

Monday, 24 February, 2020
Submitted by a.ali on Wed, 18/12/2019 - 17:10.

Publication abstract: 

The PANDA experiment at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) near GSI, Darmstadt, Germany will address fundamental questions of hadron physics. Excellent particle identification is required to achieve the PANDA physics goals. Hadronic particle identification (PID) in the PANDA target spectrometer will be delivered by two DIRC (Detection of Internally Reflected Cherenkov light) counters. The Barrel DIRC will cover the polar angle range of 22−140 degree and is designed to provide pion/kaon separation for momenta between 0.5 GeV/c and 3.5 GeV/c with a separation power of at least 3 standard deviations. Several reconstruction algorithms have been developed to determine the performance of the detector. The "geometrical reconstruction" determines the Cherenkov angle relying primarily on the position of the detected photons. The "time imaging", however, utilizes both position and time measurements by directly performing the maximum likelihood fit. GEANT4 simulations and experimental data from prototype tests at the CERN PS were used to optimize the performance of the algorithms. We will discuss detailed aspects of both reconstruction approaches.

TA-POS-2019-014

Publication title: 

The first Barrel Slice for the Electromagnetic Calorimeter of the PANDA experiment

Publication author: 

Markus Moritz, Hans-Georg Za- unick and Kai-Thomas Brinkmann for the PANDA-Collaboration

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Publication date: 

Thursday, 21 March, 2019
Submitted by markus.moritz@e... on Fri, 21/12/2018 - 09:48.

Publication abstract: 

The electromagnetic target calorimeter (EMC) of the future $\overline{\text{P}}$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 $-25^\circ \text{C}$ 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 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 endcap, vacuum phototetrodes will be used instead. In this poster the construction and assembly status of the first slice of the barrel 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, GSI and HIC for FAIR.

TA-POS-2016-009

Publication title: 

Performance of the Cluster-Jet Target for PANDA

Publication author: 

Ann-Katrin Hergemöller

File upload: 

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Talk contribution: 

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Publication date: 

Monday, 14 March, 2016
Submitted by a.hergemoeller@... on Fri, 11/12/2015 - 11:02.

Publication abstract: 

Abstract for a poster in DPG 2016 in Darmstadt

TA-POS-2014-026

Publication title: 

Feasibility studies for the open-charm production in proton-antiproton reactions for the PANDA experiment

Publication author: 

Alexandros Apostolou, Solmaz Vejdani

File upload: 

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Publication date: 

Tuesday, 14 October, 2014
Submitted by a.apostolou@hot... on Mon, 20/10/2014 - 10:34.

Publication abstract: 

The PANDA experiment is one of the pillars of the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. The PANDA physics program is focused on answering fundamental questions related to Quantum Chromodynamics (QCD), mostly in the non-perturbative energy regime. Spectroscopy exploiting D-mesons and Λ c -baryons that are com- posed of a heavy charm valence quark and one or two light valence quarks is an integral part of the PANDA physics program. Such systems can sys- tematically provide information on various key features of QCD, such as heavy-quark symmetry, chiral symmetry breaking, and the nature of exotic states. In this work, the experimental feasibility of studying the production mechanisms of associative open-charm hadrons in antiproton-proton anni- hilations is investigated using Monte Carlo simulations. We present results obtained for the channels p ̄ + p → D 0 D ̄ 0 and p ̄ + p → Λ + Λ − , highlighting the detector performances (efficiencies and resolutions) and the statistical significance that can be achieved with the foreseen luminosities.

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