Ph.D. Theses

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2018-10-02
15:00
OpenAccess [PUBDB-2018-03707] Dissertation / PhD Thesis
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Radiation damage of highly irradiated silicon sensors
Hamburg 200 pp. () [10.3204/PUBDB-2018-03707] = Dissertation, University of Hamburg, 2018  GO
Modern particle physics at colliders demands for a continuous increase of the luminosityfor colliding particle beams in order to study rare events. The requirementsfor the performance of the particle detectors are increasing while the detectors aresubject to unprecedented fluences of particles. [...]
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2018-09-25
10:27
OpenAccess [PUBDB-2018-03574] Dissertation / PhD Thesis
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Simulation of gas focused liquid jets
160 pp. () [10.3204/PUBDB-2018-03574] = Dissertation, University of Nova Gorica (Slovenia), 2018  GO
The main aim of dissertation is to develop an experimentally verified computational fluid dynamic (CFD) model of micron-sized liquid jet, produced by an injection molded Gas Dynamic Virtual Nozzle (GDVN). In these nozzles, liquid jets are efficiently orientedlytransporting mass and momentum [...]
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2018-09-25
10:23
OpenAccess [PUBDB-2018-03571] Dissertation / PhD Thesis
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Contribution to development of meshless methods for free and moving boundary problem
118 pp. () [10.3204/PUBDB-2018-03571] = Dissertation, University of Nova Gorica (Slovenia), 2018  GO
The purpose of this dissertation is the development of a novel, diffuse approximate meshless method in connection with the phase field formulation for solution of free and moving boundary problems. Free and moving boundary problems arise in a wide variety of scientific and technological applications. [...]
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2018-09-13
13:51
OpenAccess [PUBDB-2018-03497] Book/Report/Dissertation / PhD Thesis
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Precise jet measurements and search for supersymmetric particles with the CMS experiment
[DESY-THESIS-2018-026]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 175 pp. () [10.3204/PUBDB-2018-03497] = Dissertation, Universität Hamburg, 2018  GO
Searches for physics beyond Standard Model (SM) are one of the main goals of the CMSexperiment at the Large Hadron Collider (LHC). Among the investigated theories is Supersymmetry(SUSY), which would manifest in a production of new particles. [...]
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2018-09-04
14:12
OpenAccess [PUBDB-2018-03364] Dissertation / PhD Thesis
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Implications of physics beyond the Standard Model in the quark and lepton sectors
Humboldt-Universität zu Berlin 154 pp. () [10.18452/19174] = Dissertation, Humboldt-Universität zu Berlin, 2018  GO
Das Standardmodell (SM) der Teilchenphysik hat sich in der Praxis als vielseitige Theorie bewährt, dennoch deuten nichtverschwindende Neutrinomassen, dunkle Materie und Baryonenasymmetrie auf Physik jenseits des SM (BSM) hin. Um also ein mit den Beobachtungen konsistentes Modell zu entwickeln, ist eine umfassendere Theorie nötig. [...]
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2018-08-31
13:03
OpenAccess [PUBDB-2018-03318] Book/Report/Dissertation / PhD Thesis
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High Precision Transverse Emittance Measurement for Novel Plasma Accelerators at the REGAE Linac
[DESY-THESIS-2018-025]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 186 pages: illustrations, figures () [10.3204/PUBDB-2018-03318] = Dissertation, Universität Hamburg, 2017  GO
The small 5 MeV linear accelerator REGAE at DESY produces ultra short and low charge electron bunches, on the one hand to resolve the excitation transitions of atoms temporally by pump-probe electron diffraction experiments and on the other hand to investigate principal mechanisms of laser plasma acceleration. In this context the external injection of the REGAE electron bunch as a probe of the generated plasma wakefield is planned. [...]
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2018-08-25
23:32
OpenAccess [PUBDB-2018-03166] Dissertation / PhD Thesis
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Longitudinal Diagnostics for Beam-Based Intra Bunch-Train Feedback at FLASH and the European XFEL
178 pp. () [10.3204/PUBDB-2018-03166] = Dissertation, Universität Hamburg, 2018  GO
Diagnostics and control of the electron beam parameters in order to provide stable and reproducible experimental conditions for the photon users are a crucial part of operating a free-electron laser. For the beam-based longitudinal feedback at FLASH and the European XFEL, three monitor types are discussed: bunch arrival time monitor (BAM), bunch compression monitor (BCM) and synchrotron radiation monitor (SRM). [...]
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2018-08-14
15:48
OpenAccess [PUBDB-2018-02949] Book/Report/Dissertation / PhD Thesis
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Determination of TMD parton densities from HERA data and application to pp processes
[DESY-THESIS-2018-024]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 138 pp. () [10.3204/PUBDB-2018-02949] = Dissertation, Universität Hamburg, 2018  GO
The topic of this thesis is a new approach to solve the DGLAP evolution equation to obtain not only the collinear Parton Distribution Functions (PDFs) but also the Transverse Momentum Dependent (TMD) PDFs (TMDs). The DGLAP equation is solved with the Parton Branching (PB) method, which allows a determination of kinematic variables at every branching and a construction of the TMDs in a large range in longitudinal momentum fraction $x$ and evolution scale $\mu^2$. [...]
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2018-08-07
18:46
OpenAccess [PUBDB-2018-02847] Dissertation / PhD Thesis
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Transient optical properties as a signature of structural changes within FEL irradiated solids
137 pp. () [10.3204/PUBDB-2018-02847] = Dissertation, University of Hamburg, 2017  GO
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2018-07-30
14:12
OpenAccess [PUBDB-2018-02727] Book/Report/Dissertation / PhD Thesis
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Next Generation PIRL for Surgery and Bio-Diagnostics
[DESY-THESIS-2018-021]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 139 pp. () [10.3204/PUBDB-2018-02727] = Dissertation, Universität Hamburg, 2018  GO
Recent studies show that scar-free surgery is possible with picosecondlaser pulses tuned to the strong absorption band of water in the Mid-IR. Away to generate these pulses is with an optical parametric amplifier (OPA)pumped by a picosecond infrared laser (PIRL). [...]
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