Modern particle accelerators and their applications increasingly rely on precisely coordinated interactions of intense charged particle and laser beams. Femtosecond-scale synchronization alongside micrometre-scale spatial precision are essential e.g. for pump-probe expe...

In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider (FCC-hh), a h...

The European XFEL (E-XFEL) is being fabricated in Hamburg to serve as an X-ray Free Electron Laser light source. The electron beam will be accelerated through linacs consisting of 1.3 GHz superconducting cavities along a length of 2.1 km. In addition, third harmonic cav...

We regret the oversight of not acknowledging the significant amount of work by several colleagues in the field (see [1–4]and references therein). In particular, we would like to highlight the work performed at the Istituto Nazionale di FisicaNucleare (INFN) for the real...

The beam phase relative to the accelerating field is of vital importance for the quality of photon beams produced in modern Free Electron Lasers based on superconducting cavities. Normally, the phase is determined by detecting the transient field induced by the beam. In...

– A brief introduction to the European XFEL and Higher Order Modes– Principle of beam phase determination– Simulations with circuit model– Measurements with a broadband setup– Summary and Outlook

In this thesis an optimized calorimetry chamber is developed, providing at and easy mountable samples. Furthermore, it enables exchangeability of samples between the resonators at HZB and CERN. The thesis is structured as follows: First, a short introduction into SRF is...

This Master thesis has been carried out at the CERN, the European Organization for Nuclear Research. In view of the High Luminosity upgrade of the Large Hadron Collider (LHC), a new family of materials for the collimation system must be characterized. The collimator mat...

The SwissFEL Injector Test Facility operated at the Paul Scherrer Institute between 2010 and 2014, serving as a pilot plant and testbed for the development and realization of SwissFEL, the X-ray Free-Electron Laser facility under construction at the same institute. The ...

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 Superconducti...