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Master Arbeiten
| Development of new pixel detectors based on the High-Voltage MAPS Technology | André Schöning |
| Our group is developing a new pixel detectors based on the High-Voltage MAPS (monolithic active pixel detector) technology. This new technology is superior in many respects compared to standard hybrid silicon detectors. It will be used for the new Mu3e experiment and is also considered for the LHC-High Luminosity upgrade of the ATLAS experiment. We offer several bachelor and master theses in this area. For more information contact D.Wiedner or A.Schoening. | |
| Experimentelle und theoretische Tests der Quantenmechanik bei niedrigsten Energien | Maarten DeKieviet |
Das in Heidelberg entwickelte 3He-Atomstrahl-Spinecho-Spektrometer ermöglicht das Vermessen kleinster Energieänderungen (~100 peV) in der Wechselwirkung zwischen Atomen und Felder oder Materie. Das Experiment ist in seiner Form weltweit einzigartig und erforscht derzeit:
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| Discharge studies in GEM detectors for the ALICE Time Projection Chamber at the LHC | Silvia Masciocchi |
| Gaseous detectors are excellent tools for particle detection, precise tracking and identification in high-energy particle and nuclear physics, as well as for other applications in medicine and industry. GEM (gas electron multiplier) foils are employed for signal amplification and allow for operation of the detectors also in environments with high particle densities. We are using small prototype detectors to investigate the underlying mechanisms, which can cause electrical discharges in the GEM foils, and therefore endanger their safe operation. Simulations that complement the measurements are also possible. The findings can have an impact on the operation of current and future GEM-based detectors. The work is done in the context of the ALICE Time Projection upgrade, in collaboration with GSI (www.gsi.de, my research team there: alice-wiki.gsi.de/foswiki/bin/view/) and CERN (home.cern, the ALICE experiment: alice-collaboration.web.cern.ch/). Periods of work at the two labs are foreseen. For more information please contact Silvia Masciocchi (s.masciocchi@gsi.de, https://www.physi.uni-heidelberg.de/~sma/). | |
| Search for thermal photons in high-multiplicity proton-proton collisions with ALICE | Klaus Reygers, |
| In high-energy Pb-Pb collisions one studies an extreme state of matter, the quark-gluon plasma, ich which quarks and gluons are no longer confined within hadrons. A burning question is whether this state is also produced in proton-proton collisions at the LHC. Studying proton-proton collisions with a large number of produced hadrons is of particular interest. We would like to search for thermal photons from the quark-gluon plasma in these collisions. This analysis profits from the large statistics of proton-proton collisions at a center-of-mass energy of 13 TeV obtained by the ALICE experiment. Our group has specialized in photon reconstruction through their conversion into electron-positron pairs, a method which is particularly suited to search for low-pT thermal photons. Some programming experience (C++) would be benefitial for this project. | |
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