A novel waveguide RF Wien filter for electric dipole moment measurements of deuterons and protons at the COoler SYnchrotron (COSY)/Jülich

The matter-antimatter asymmetry in the universe cannot be explained by the level of predicted CP-violation sources in the Standard Model (SM) of particles. As a possible explanation, is the existence of permanent electric dipole moment (EDM) as a fundamental property of particles. The search for EDM of charged particles requires a dedicated all-electric storage ring, an option that is not available at the moment. Therefore, the JEDI (Jülich Electric Dipole moment Investigations) collaboration has decided to equip the existing magnetic storage ring, the COoler SYnchrotron (COSY), with a novel device called the radio frequency (RF) Wien filter to conduct the first ever EDM measurement of deuterons and protons. The RF Wien filter is a device, that is able of generating an EDM signal proportional to the spin precession of particles. This thesis is concerned with the design, simulation, analysis, realization and commissioning of the RF Wien filter. Similar to the classical Wien filter, the RF Wien filter is an electromagnetic device that generates orthogonal fields with a well-defined ratio between the electric and magnetic field. These conditions lead to a vanishing Lorentz force, thus the device does/should not introduce any beam distortion. Secondly, it is a spin sensitive device; it operates at the resonant spin precession frequencies at which, the influence of the RF Wien filter on the particles' spin is maximized. Moreover, high field homogeneity is sought as inhomogeneities lead to a fake EDM signal. These requirements are found to be met by the waveguide based RF Wien filter. Full-wave simulations have been conducted to design and optimize the full-structure including the mechanical parts. Nearly vanishing Lorentz force with high field homogeneities have been achieved. Analysis of mechanical tolerances and misalignments have been included in the calculations. The RF driving circuit worked well and fulfilled its requirements in terms of adapting the magnitude and phase of the field quotient. The device has been successfully commissioned with proton beam measurements. With excited impedance mismatch, it was possible to drive beam oscillations from 0 up to 25 µm