Published September 2017
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Analysis of the cool down related cavity performance of the European XFEL vertical acceptance tests
Description
For the European X-Ray Free Electron Laser (XFEL) cavity production, the cold radio-frequency (RF) test of the cavities at 2 K after delivery from the two vendors was the mandatory acceptance test. It has been previously reported, that the cool down dynamics of a cavity across Tc has a significant influence on the observed intrinsic quality factor Q0, which is a measure of the losses on the inner cavity surface. A total number of 367 cool downs is used to analyze this correlation and we show that such a correlation is not observed during the European XFEL cavity production.
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Additional details
Publishing Information
- Imprint Pagination
- 14 p.
- ISSN
- 0418-9833
- Report number
- DESY--17-135
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 48084632
- Subject category
- S43: PARTICLE ACCELERATORS;
- Descriptors DEI
- BEAM TRANSPORT; ELECTRIC FIELDS; ELECTRON BEAMS; FREE ELECTRON LASERS; HELIUM DILUTION REFRIGERATION; PERFORMANCE; RELAXATION LOSSES; RF SYSTEMS; SUPERCONDUCTING CAVITY RESONATORS; TEMPERATURE RANGE 0000-0013 K; X-RAY LASERS
- Descriptors DEC
- BEAMS; CAVITY RESONATORS; COOLING; ELECTRONIC EQUIPMENT; ENERGY LOSSES; EQUIPMENT; LASERS; LEPTON BEAMS; LOSSES; PARTICLE BEAMS; REFRIGERATION; RESONATORS; SUPERCONDUCTING DEVICES; TEMPERATURE RANGE