Performance analysis of the European X-ray Free Electron Laser 3.9 GHz superconducting cavities
- Resource Type
- Authors
- Andrea Bignami; Angelo Bosotti; Rocco Paparella; Daniele Sertore; Laura Monaco; Jinfang Chen; C. G. Maiano; Paolo Michelato; Carlo Pagani; P. Pierini; Michele Bertucci
- Source
- Physical Review Accelerators and Beams, Vol 22, Iss 8, p 082002 (2019)
- Subject
- Superconductivity
Nuclear and High Energy Physics
Materials science
Physics and Astronomy (miscellaneous)
Field (physics)
010308 nuclear & particles physics
Free-electron laser
X-ray
Field dependence
Surfaces and Interfaces
01 natural sciences
0103 physical sciences
lcsh:QC770-798
Physics::Accelerator Physics
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
High field
Thermal model
Atomic physics
010306 general physics
Sheet resistance
- Language
- ISSN
- 2469-9888
The limits of performance of the European XFEL 3.9 GHz superconducting cavities were investigated. Most cavities exhibited high field Q slope, reaching the breakdown field at approximately $22\text{ }\text{ }\mathrm{MV}/\mathrm{m}$. We hypothesize that this limit is a feature of high frequency cavities and can be explained by a thermal model incorporating field dependent surface resistance. The results obtained from simulations were in good agreement with experimental data obtained at 2 K.