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Response of a PANDA electromagnetic calorimeter prototype to energies below 100 MeV.
Stockholm University, Faculty of Science, Department of Physics.
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The antiProton annihilation at Darmstadt (PANDA) experiment is designed for studies of the strong force. It will be built and placed in the high energy storage ring (HESR) at the facility for antiproton and ion research (FAIR) in Darmstadt. The beam of the HESR consists of anti protons in an energy range from 0.8 GeV to 14 GeV and will collide with a fixed hydrogen target. The detectors of PANDA are designed for e.g. detailed hadron spectroscopy by detecting the anti-proton-proton interactions in the transition region between perturbative and non perturbative quantum chromo dynamics (QCD).This thesis summarizes preparatory experiments with a PANDA forward endcap ElectroMagnetic Calorimeter (EMC) prototype performed at MAX IV laboratory, for studying the response to photon energies below 100 MeV using vacuum photo tetrodes (VPTTs) as photo sensors. The prototype was cooled down to -25 °C. Two different sets of VPTTs were investigated as well as two different analog to ditigital converters (ADCs), peak-sensing ADCs and sampling ADCs. The results show that with VPTT photosensors, in combination with sampling ADCs, the technical design report (TDR) requirement, with regard to energy resolution, can be fulfilled even at low energies.

Place, publisher, year, edition, pages
Stockholm University, 2019.
National Category
Accelerator Physics and Instrumentation
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-166909OAI: oai:DiVA.org:su-166909DiVA, id: diva2:1294459
Presentation
2019-03-28, B4:1059, Albanova universitetscentrum, Roslagstullsbacken 21, Stockholm, 09:30 (English)
Opponent
Supervisors
Available from: 2019-06-11 Created: 2019-03-07 Last updated: 2019-06-11Bibliographically approved

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