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View article: A 2D pixelated stilbene scintillator detector array for simultaneous radiography with fast neutrons and gammas
A 2D pixelated stilbene scintillator detector array for simultaneous radiography with fast neutrons and gammas Open
For radiography applications using fast neutrons simultaneously with gammas\nwe have developed a detector with 16 stilbene crystals in a 4$\\times$4 2D array\nwith a 5~mm pitch and a depth of 25~mm. The crystal array is read out by\nSilico…
View article: Search for dark matter with machine learning techniques in leptonic final states and missing transverse energy at the CMS experiment
Search for dark matter with machine learning techniques in leptonic final states and missing transverse energy at the CMS experiment Open
This thesis presents work for the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). The two main subjects are a search for Dark Matter events in final states with one lepton within two supersymmetry (SUSY) models a…
View article: Search for excited leptons with pp collisions at [square root]s = 13TeV with the CMS experiment at the LHC
Search for excited leptons with pp collisions at [square root]s = 13TeV with the CMS experiment at the LHC Open
This thesis presents the search for excited electrons and muons in proton-proton collisions at the CMS detector at a center-of-mass energy of 13 TeV. It analyses the collisions delivered by the LHC in 2016 and 2017. Excited leptons are a d…
View article: Novel GEM detectors for CMS and exotic physics searches at the HL-LHC
Novel GEM detectors for CMS and exotic physics searches at the HL-LHC Open
The LHC at CERN will be upgraded to become the HL-LHC during the first half of the2020s. The significant increase in instantaneous luminosity allows probing particle physics with even greater sensitivity. At the same time, the physics envi…
View article: 2S Modules for the Phase-2 Upgrade of the CMS Tracker
2S Modules for the Phase-2 Upgrade of the CMS Tracker Open
The CMS experiment at the Large Hadron Collider LHC will face a new era after Long Shutdown 3, which is scheduled to take place between 2024 and 2026. The challenge of running a tracking detector at the High Luminosity LHC will be the high…
View article: Development of an acoustic positioning system for the minimally invasive exploration of a sub glacial water reservoir at the Taylor Glacier within the Enceladus Explorer (EnEx) project
Development of an acoustic positioning system for the minimally invasive exploration of a sub glacial water reservoir at the Taylor Glacier within the Enceladus Explorer (EnEx) project Open
Finding extraterrestrial life or proving its existence are enormous challenges. Candidate places to find this life are already found within the solar system. Of particular interest are the icy moons of Saturn and Jupiter, which contain a l…
View article: Efficiency and timing resolution of scintillator tiles read out with silicon photomultipliers
Efficiency and timing resolution of scintillator tiles read out with silicon photomultipliers Open
Silicon photomultipliers (SiPM) are semiconductor photo sensors that have the potential to replace photomultiplier tubes (PMT) in various fields of application. We present detectors consisting of 30 × 30 × 0.5 cm3 fast plastic scintillator…
View article: Monte Carlo based modeling and simulation of neutron flux distribution and activity map of the German research reactor FRJ-2
Monte Carlo based modeling and simulation of neutron flux distribution and activity map of the German research reactor FRJ-2 Open
As a consequence of the amendment to the atomic energy act in 2011 in Germany eight of the 17 operational nuclear power plants were forced to shut down and the remaining nine units will have to cease operation by 2022. The largest amount o…
View article: Detailed studies of light transport in optical components of particle detectors
Detailed studies of light transport in optical components of particle detectors Open
Scintillator- and ï¬bre-based particle detectors are an indispensable tool in high-energy par-\nticle physics, medical physics and other ï¬elds of application. The potentially very low light\nyield, down to a few photons, of the optical …