Superconducting cavities are used in particle accelerator machines to efficiently accelerate charged particles up to the desired energy. To characterize the resonator with respect to the interaction to moving particles the well-known concept of narrow-band impedances is used. A suitable method to determine the desired impedance is given by a proper eigenmode calculation of the given structure...
Superconducting radio frequency (SRF) cavities used for accelerating charged particle beams are commonly used in accelerator facilities around the world. The design and optimization of modern SRF cavities requires intensive numerical simulations. Vast number of operational parameters must be calculated to ensure appropriate functioning of the accelerating structures.
The increased demand for...
The BESSY VSR project is a future upgrade of the 3th generation BESSY II light source. The key feature of the project is the simultaneous storage of long (ca. 15 ps) and short (ca. 1.7 ps) electron bunches under “standard” user optics. This challenging goal requires the installation
of SRF higher harmonic cavities of the fundamental 500MHz at two different frequencies.
Therefore four new SRF...
In this report we estimate the long- and the short-range wake functions at the third harmonic module of the European XFEL. The estimations are based on direct time-domain calculations with code ECHO. We use rotationally symmetric approximation of the geometry (without RF couplers). The complete cryomodule with 8 cavities including steps and bellows is considered.
