| Paper | Title | Page |
|---|
| MO204 | FLASH progress report | 14 |
| | | |
| | The free electron laser in Hamburg (FLASH) is a user
facility providing high brilliant laser light for experiments
in the VUV and EUV wavelengths range. It is based on
TESLA type superconducting accelerating structures, and
therefore a unique facility for testing superconducting accelerator
technology for the European XFEL, and for supporting
the international linear collider (ILC) R&D effort.
This workshop contribution reviews the progress on superconducting
RF technology in view of cavity and accelerating
module performance and reports about the operational
experience gained with FLASH operated as a user facility. | |
 | Slides(PDF) | |
| WEP17 | Considerations on the third harmonic RF of the European XFEL | 481 |
| | - E. Vogel, M. Dohlus, M. Huening, K. Jensch, A. Matheisen, W. -D. Moeller, A. Schmidt, W. Singer
DESY Hamburg - H. Edwards, E. Harms, T. Khabiboulline
Fermilab
| |
| | Ultra short bunches with high peak current are required for the creation of high brilliance coherent light in the x-ray range in undulators. At the European x-ray free electron laser (XFEL) they will be obtained by a two stage bunch compression scheme based on off the rf field crest acceleration and transverse magnetic chicanes. The deviation of the rf field's sine shape from a straight line leads to long bunch tails and reduce peak current. This effect will be eliminated by adding a third harmonic rf system. The paper surveys the basic principle for the third harmonic rf, the most relevant design parameters, the actual status of beam physical examinations and potential concepts for the technical realization. | |