Ph.D. Theses

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2018-05-09
17:57
OpenAccess [PUBDB-2018-01938] Book/Report/Dissertation / PhD Thesis
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A simulation framework for studying high intensity x-ray induced dynamics and scattering patterns from nanocrystals
[DESY-THESIS-2018-014]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS , 121 pp. () [10.3204/PUBDB-2018-01938] = Dissertation, Universität Hamburg, 2017  GO
A standard method of reconstructing the structure of a protein in its crystalline phase is by x-ray diffraction. New generation x-ray sources, the X-ray free-electron lasers (XFEL), provide novel opportunities for biomolecular structure determination. [...]
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2018-05-09
14:08
OpenAccess [PUBDB-2018-01937] Book/Report/Dissertation / PhD Thesis
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Generation of ultra-short low-charge electron bunches for single-spike SASE radiation at the Free-Electron Laser in Hamburg
[DESY-THESIS-2018-015]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS , 144 pp. () [10.3204/PUBDB-2018-01937] = Dissertation, Universität Hamburg, 2017  GO
High-gain Free-Electron Lasers (FEL) constitute a powerful source of intense, short radiation pulses in the XUV and X-ray range that are used in a wide variety of research fields. They typically work in the Self-Amplified Spontaneous Emission (SASE) Mode. [...]
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2018-04-27
19:30
OpenAccess [PUBDB-2018-01870] Book/Report/Dissertation / PhD Thesis
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Studies of adhesives and metal contacts on silicon strip sensors for the ATLAS Inner Tracker
[DESY-THESIS-2018-011]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS , 260 pp. () [10.3204/PUBDB-2018-01870] = Dissertation, Humboldt-Universität zu Berlin, 2018  GO
This thesis presents studies investigating the use of adhesives on the active area of silicon strip sensors for the construction of silicon strip detector modules for the ATLAS Phase-II Upgrade. 60 ATLAS07 miniature sensors were tested using three UV cure glues in comparison with the current baseline glue (a non-conductive epoxy).The impact of irradiation on the chemical composition of all adhesives under investigation was studied using three standard methods for chemical analysis: quadrupole time-of-flight mass spectroscopy, gel permeability chromatography and gas chromatography combined with mass spectrometry (GC-MS). [...]
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2018-04-26
13:42
OpenAccess [PUBDB-2018-01857] Book/Report/Dissertation / PhD Thesis
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Design Study of a Laser-Driven X-ray Source for Medical Fluorescence Imaging
[DESY-THESIS-2018-010]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY THESIS , 171 pp. () [10.3204/PUBDB-2018-01857] = Dissertation, Universität Hamburg, 2017  GO
Thomson scattering, or inverse Compton scattering, is a technique holding the potentialfor the generation of X-radiation of high brilliance on the basis of the photon emission byrelativistic electrons in optical laser fields. When combined with laser-plasma accelerators,purely laser-driven X-ray sources can be realised on a small scale compared to conventionalaccelerator-based sources. [...]
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2018-04-19
14:12
OpenAccess [PUBDB-2018-01793] Book/Report/Dissertation / PhD Thesis
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Beyond the SM searches at the LHC: Little Higgs models and Effective Field Theory
[DESY-THESIS-2018-008]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS , 117 pp. () [10.3204/PUBDB-2018-01793] = Dissertation, Universität Hamburg, 2018  GO
In this thesis, we discuss two different approaches to physics beyond the Standard Model.First, we study a model-independent Effective Field Theory formalism. In particular, wefocus on bosonic CP-even six-dimensional operators. [...]
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2018-04-03
12:31
OpenAccess [PUBDB-2018-01615] Book/Report/Dissertation / PhD Thesis

On magnesium-containing implants for bone applications
[I-20130475 EC]
, 372 pp. () [10.3204/PUBDB-2018-01615] = Dissertation, Malmö University, 2016  GO
The biomedical technologies for bone application are employed in millions of patients every year to restore function and aesthetics following trauma, diseases and congenital deformities. They achieved significant advancements in the last decades and have resulted in the development of implants that function for long periods of time. [...]
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2018-03-12
12:35
OpenAccess [PUBDB-2018-01450] Dissertation / PhD Thesis

Non-perturbative investigation of current correlators in twisted mass lattice QCD
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I , 209 pp. () [10.18452/16770] = Dissertation, Humboldt-Universität zu Berlin, 2013  GO
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2018-03-12
12:28
OpenAccess [PUBDB-2018-01449] Dissertation / PhD Thesis
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Chiral description and physical limit of pseudoscalar decay constants with four dynamical quarks and applicability of quasi-Monte Carlo for lattice systems
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I , 107 pp. () [10.18452/17244] = Dissertation, Humboldt-Universität zu Berlin, 2014  GO
In dieser Arbeit werden Massen und Zerfallskonstanten von pseudoskalaren Mesonen, insbes. dem Pion und dem D-s-Meson, im Rahmen der Quantenchromodynamik (QCD) berechnet [...]
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2018-03-12
11:18
OpenAccess [PUBDB-2018-01447] Dissertation / PhD Thesis
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Investigations of chiral symmetry breaking and topological aspects of lattice QCD
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I , 198 pp. () [10.18452/16890] = Dissertation, Humboldt-Universität zu Berlin, 2013  GO
Die spontane Brechung der chiralen Symmetrie ist ein faszinierendes Phenomän der QCD mit fundamentalen phänomenologischen Implikationen. Die Brechung der chiral Symmetrie ist beispielsweise verantwortlich für die niedrige Masse der Pionen, welche die effektiven Goldstone Boson der spontan gebrochene Symmetrie sind [...]
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2018-03-06
14:12
OpenAccess [PUBDB-2018-01381] Book/Report/Dissertation / PhD Thesis
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Acceleration of laser-injected electron beams in an electron-beam driven plasma wakefield accelerator
[DESY-THESIS-2018-006]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY THESIS , 135 pp. () [10.3204/PUBDB-2018-01381] = Dissertation, Universität Hamburg, 2018  GO
Plasma wakefields deliver accelerating fields that are approximately a 100 times higher thanthose in conventional radiofrequency or even superconducting radiofrequency cavities. Thisopens a transformative path towards novel, compact and potentially ubiquitous accelerators.These prospects, and the increasing demand for electron accelerator beamtime for various applicationsin natural, material and life sciences, motivate the research and development on novelplasma-based accelerator concepts. [...]
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