Ph.D. Theses

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2019-03-19
10:07
OpenAccess [PUBDB-2019-01602] Dissertation / PhD Thesis

Higher-Order-Mode-based Beam Phase and Beam Position Measurements in Superconducting Accelerating Cavities at the European XFEL
183 pp. () [10.3204/PUBDB-2019-01602] = Dissertation, University of Manchester, 2017  GO
Instrumentation of higher order modes (HOMs) excited in accelerating cavities for beam phase and position inference provides a noninvasive and economical beam diagnostic. The principles and techniques for this purpose are investigated for TESLA (TeV Energy Superconducting Linear Accelerator) cavities at the injector part of the newly built European XFEL and at FLASH, two free electron laser facilities based on the TESLA technology.I have designed and instrumented unconventional beam phase monitors based on monopole modes in TESLA cavities and demonstrated a routine resolution of 0.1° with a broadband setup [...]
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2019-03-15
10:39
OpenAccess [PUBDB-2019-01556] Dissertation / PhD Thesis

Study of self-modulation of an electron beam in plasma
142 pp. () [10.3204/PUBDB-2019-01556] = Dissertation, University of Hamburg, 2018  GO
The acceleration of electron beams in plasma wakefields driven by charged particlebeams is among the most promising candidates for future TeV-scale compact electronaccelerators. Currently available high energy proton beams that could serve as driverbeams in a plasma wakefeld accelerator (PWFA) are much longer than what is requiredfor efficient excitation of high-amplitude wakefields and thus for generating the desiredhigh acceleration gradients. [...]
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2019-02-15
09:54
[PUBDB-2019-01128] Dissertation / PhD Thesis

Strukturelle und physikalische Eigenschaften von Kupfersulfiden bei hohen Drücken und tiefen Temperaturen und elektrische Widerstandsmessungen als Funktion des Drucks
143 pp. () = Dissertation, Johann Wolfgang Goethe-Universität, 2018

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2019-02-15
09:49
[PUBDB-2019-01126] Dissertation / PhD Thesis

Synthese und Charakterisierung binärer und ternärer Übergangsmetallboride der Periode 6
202 pp. () = Dissertation, Johann Wolfgang Goethe-Universität, 2018

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2019-01-29
15:40
OpenAccess [PUBDB-2019-00851] Book/Report/Dissertation / PhD Thesis

Diffraction anomalous fine structure in Laue geometry
[DESY-THESIS-2018-043]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 108 pp. () [10.3204/PUBDB-2019-00851] = Dissertation, Universität Hamburg, 2016  GO
This thesis deals with the further development of the method of Borrmannspectroscopy and the development of the novel method of diffractionanomalous fine structure in Laue geometry.Borrmann spectroscopy utilizes the Borrmann effect in order to enhancethe quadrupol absorption, which enables studying weak quadrupoltransitions. In the present work a model is developed, which describes thedependence of the quadrupol enhancement on temperature and anisotropyof the chemical environment. [...]
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2019-01-17
10:15
OpenAccess [PUBDB-2019-00540] Book/Report/Dissertation / PhD Thesis

High repetition rate THz characterization at 4th generation X-Ray light sources
[DESY-THESIS-2019-001]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 266 pp. () [10.3204/PUBDB-2019-00540] = Dissertation, Universität Hamburg, 2018  GO
Within this work a wholesome approach to the characterization of FEL based THz radiationis made on the example of the THz radiation provided at the THz beamline at Flash thefree electron laser at DESY in Hamburg. A SRW based model of the THz generation froma free electron and the corresponding transport is developed and used to gain insight intothe complex intensity profile created by the interplay of the THz undulator and variousmagnetic edges. [...]
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2019-01-04
11:07
OpenAccess [PUBDB-2019-00039] Dissertation / PhD Thesis

Structure and dynamics of glass-forming fluids
134 pp. () [10.3204/PUBDB-2019-00039] = Dissertation, University of Hamburg, 2018  GO
Colloidal dispersions are ubiquitous in our daily life and find numerous applications in industry and science. They are in particular used as a model system to study phase transitions in soft matter systems. [...]
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2018-12-27
09:04
OpenAccess [PUBDB-2018-05902] Dissertation / PhD Thesis

High-intracavity-power thin-disk laser for the alignment of molecules
137 pp. () [10.3204/PUBDB-2018-05902] = Dissertation, University of Hamburg, 2018  GO
The subject of this thesis was the development of a thin-disk laser with a continuous waveintracavity intensity of more than $10^{10} {W}{cm^{-2}}$ for the adiabatic alignment ofmolecules. In particular, this necessitates an intracavity power of more than 100 kW, aninternal focus with a radius of 20 µm, a well-defined and stable polarization, and benefitsfrom fundamental transverse mode operation. [...]
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2018-12-19
17:03
OpenAccess [PUBDB-2018-05768] Dissertation / PhD Thesis

Studium molekulárních mechanismů regulace signálních proteinů
160 pp. () [10.3204/PUBDB-2018-05768] = Dissertation, Charles University Prague, 2018  GO
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2018-12-19
16:59
OpenAccess [PUBDB-2018-05767] Dissertation / PhD Thesis

Structural and functional study of the SaPI$\mathrm{_{bov1}}$ $\mathit{Staphylococcus}$ $\mathit{aureus}$ pathogenicity island regulator protein
126 pp. () [10.3204/PUBDB-2018-05767] = Dissertation, Budapest University of Technology and Economics, 2018  GO
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