Books

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. [...]

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. [...]

The invention of free electron lasers (FELs) opened new opportunities for the investigation of natural phenomena. However, the operation of a FEL requires high energy, high peak current electron beams with very small transverse emittance which causes extreme requirements for the corresponding electron sources. [...]

A search for pair produced scalar leptoquarks decaying into a top quark and a tau lepton using proton-proton collision data recorded in 2016 at a center-of-mass energy of 13TeV by the CMS experiment, corresponding to an integrated luminosity of 35.9fb$^{-1}$ is presented. The search is performed in final states with an electron or a muon, one or two hadronically decaying tau leptons, and additional jets. [...]

The use of a hollow plasma channel in plasma-based acceleration has ben-eficial properties for the acceleration of electron and positron bunches. Inthe scope of the FLASHForward facility at DESY, the generation of sucha plasma structure is examined. [...]

In this thesis, measurements of different charged-particle distributions performed with the CMS detector in proton-proton collisions at a centre-of-mass energy √s = 13TeV are presented.In particular, the charged-particle pseudorapidity distributions, also referred to as charged-particle pseudorapidity densities, the multiplicity distributions of charged particlesper event, and different transverse-momentum distributions corresponding to all chargedparticles, the leading charged-particle, and the integrated spectrum of the latter are presented.The charged-particles are selected with transverse momenta pT > 0.5 GeV in the range |η| < 2.4. The data are corrected for the different detector effects such as resolution andefficiency [...]

Photoabsorption spectra of gaseous hydrides of 3p elements (PH$_3$, H$_2$S, HCl) are measured in the energy region of photoexcitations pertaining to K edge. The analysis is extended to hydrides of 4p series (GeH$_4$, AsH$_3$, H$_2$Se, HBr) from an earlier experiment, and to noble gases Ar and Kr as well as the published spectrum of SiH$_4$, inaccessible to our measurement. [...]

Measurements of the $Z \rightarrow \ell^+\ell^-$ production cross sections, where ` = e; , in protonprotoncollisions at ps = 13 TeV are presented using two sets of data recorded by the ATLAS experiment at the Large Hadron Collider. The data sets correspond to a totalintegrated luminosity of 81 pb$^{-1}$ and 3:2 fb$^{-1}$ collected in 2015 using the 50 ns and25 ns bunch spacing congurations, respectively. [...]