2023-11-27 15:31 |
[PUBDB-2023-07215]
Dissertation / PhD Thesis
Ribeiro Lopes, B. ; Jafari, A. ; Gallo-Voss, E.
Differential ratio measurements of $\mathrm{t\bar{t}\gamma}\,/\,\mathrm{t\bar{t}}$ and a search for exclusive $\mathrm{t\bar{t}}$ with the CMS experiment
[CERN-THESIS-2023-256]
207 pp. (2023)2023 = Dissertation, University of Hamburg, 2023
In this thesis, measurements performed using proton-proton collision data at $\sqrt{s} = 13$TeV collected by the CMS experiment at the CERN LHC, in the years 2016, 2017, and 2018, are presented. The data correspond to an integrated luminosity of 138$~\mathrm{fb}^{-1}$.New results on top quark pair production in association with a photon ($\mathrm{t\bar{t}\gamma}$) are presented. [...]
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2023-11-22 10:12 |
[PUBDB-2023-07072]
Dissertation / PhD Thesis
Trost, F. ; Moshammer, R. ; Quint, W.
Time-resolved Fragmentation of Diiodomethane studied in an XUV Pump-Probe Experiment
Heidelberg University Library 124 pp. (2023)2023 = Dissertation, University of Heidelberg, 2023
The dissociation dynamics of diiodomethane molecules (CH2I2) have been investigated in a 97.6 eV XUV-pump XUV-probe measurement at the reaction microscope endstation at the free-electron laser FLASH2. Ionic fragments created by 4d inner-valence ionisation followed by Auger decay have been detected in coincidence, enabling a kinematically complete reconstruction of the dissociation pathways [...]
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2023-11-20 11:17 |
[PUBDB-2023-07012]
Dissertation / PhD Thesis
Puntel, D. ; Cilento, F.
Ultrafast photoelectron spectroscopy of quantum materials with a novel 10.8 eV photon source
142 pp. (2023)2023 = Dissertation, Università degli Studi di Trieste, 2023
This thesis presents the study of three quantum materials conducted by means of a novel photon source for Time- and Angle-Resolved Photoelectron Spectroscopy (TR-ARPES) developed at the T-ReX laboratory at FERMI (Elettra, Trieste). This source provides pulses at a photon energy of 10.8 eV up to the MHz repetition rate, while offering picosecond time resolution and few tens of meV energy resolution. [...]
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2023-11-20 11:06 |
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2023-11-13 16:55 |
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2023-11-08 10:23 |
[PUBDB-2023-06679]
Book/Dissertation / PhD Thesis
Ritzkowsky, F. ; Kärtner, F. ; Küpper, J.
Electronics at Optical Frequencies
[DESY-THESIS-2023-018]
Hamburg : Verlag Deutsches-Elektronen Synchrotron, DESY-THESIS 146 pp. (2023) [10.3204/PUBDB-2023-06679]2023 = Dissertation, Universität Hamburg, 2023
With the advent of ultrafast optics and controllable waveforms consisting of only a few oscillations of the electric field, the idea of controlling electrons at the frequency of light was born. This established the potential of using a controlled optical waveform to switch electronic circuit elements at the frequency of an optical wave, typically on the order of 0.1 to 1 petahertz(1015 Hz). [...]
OpenAccess: desy-thesis-23-018.title - PDF PDF (PDFA); Thesis - PDF PDF (PDFA);
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2023-11-06 18:59 |
[PUBDB-2023-06617]
Dissertation / PhD Thesis
Kroh, T. ; Kärtner, F. ; Matlis, N.
A compact THz-driven electron gun
Novel all-optical terahertz (THz)-based accelerators promise to enable new science by providing ultrafast and bright electron bunches at a small footprint. While practical prototypes of THz-based devices have been demonstrated and have shown exceptional capabilities to accelerate and manipulate electron beams on sub-ps timescales, the development of practical THz-driven photoguns has lagged behind due to challenges associated with physical miniaturization and the high THz pulse energy required. [...]
Published on 2023-08-10. Available in OpenAccess from 2024-08-10.: PDF PDF (PDFA);
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2023-10-26 10:38 |
[PUBDB-2023-06408]
Book/Dissertation / PhD Thesis
Fabry, F. ; Diehl, M. ; Moch, S.-O.
Double parton scattering: parton correlations and their scale evolution
[DESY-THESIS-2023-016]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 183 pp. (2023) [10.3204/PUBDB-2023-06408]2023 = Dissertation, Universität Hamburg, 2023
Double parton scattering (DPS) describes a process in hadron-hadron scattering in which two partons are extracted from each initial hadron and then initiate hard scattering processes separated by a finite distance. After factorising the hadronic process, one obtains parton distributions functions that characterise the behaviour of partons inside the hadron at non-perturbative scales. [...]
OpenAccess: desy-thesis-23-016.title - PDF PDF (PDFA); Thesis - PDF PDF (PDFA);
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2023-10-23 13:33 |
[PUBDB-2023-06337]
Book/Dissertation / PhD Thesis
Eichner, T. ; Maier, A. ; Kärtner, F.
Improved Pulse Characteristics and Power Scaling of Drive Lasers for Laser-Wakefield Acceleration
[DESY-THESIS-2023-015]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 192 pp. (2023) [10.3204/PUBDB-2023-06337]2023 = Dissertation, Universität Hamburg, 2023
Laser-wakefield acceleration (LWFA) is a promising, emerging technology for future accelerator-based X-ray light sources, which are essential tools in various fields of science, industry and medicine. In laser-wakefield acceleration, an intense laser pulse drives a plasma wave that supports high accelerating field gradients. [...]
OpenAccess: thesis - PDF PDF (PDFA); desy-thesis-23-015.title - PDF PDF (PDFA);
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2023-10-18 13:34 |
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