000001569 001__ 1569
000001569 005__ 20190130104945.0
000001569 037__ $$aPROCEEDING-2018-013
000001569 041__ $$aeng
000001569 245__ $$aStatus of the Radiation Damage on the European XFEL Undulator Systems
000001569 269__ $$a2018
000001569 336__ $$aProceedings
000001569 520__ $$aThe European XFEL GmbH is a new X-ray FEL user facility and started lasing in 2017. Three movable gap SASE Undulator Systems based on hybrid NdFeB permanent magnet technology were built. Radiation damage due to machine operation affects the magnetic propertiesof the segments and the quality of the SASE process.Dosimeters monitor the absorbed doses in every undulator segment and each SASE system is equipped with a diagnostic undulator (DU). We report on the profile of the absorbed doses seen in the first year of the Undulator Systems operation. Magnetic field degradation higher than 3.5% in the DU is found and associated to absorbed doses up to 4.4 kGy. An initial limit of 55 Gy for the 5-mundulator segments is recommended based on the precise K-parameter determination for beam operation.
000001569 546__ $$aEnglish
000001569 655__ $$aOther
000001569 690__ $$aEuXFEL facility
000001569 7001_ $$01187$$aWolff-Fabris, Frederik
000001569 7001_ $$01118$$aPflueger, Joachim
000001569 7001_ $$aSchmidt-Föhre, Frank
000001569 7001_ $$aHellberg, F.
000001569 7112_ $$a9th International Particle Accelerator Conference$$cVancouver$$d2018-04-29$$gIPAC’18$$m2018-05-04
000001569 773__ $$qWEYGBD2$$tProceedings of IPAC2018
000001569 790__ $$aEuXFEL staff
000001569 790__ $$aOther
000001569 85641 $$uhttp://ipac2018.vrws.de/papers/weygbd2.pdf
000001569 8564_ $$s455561$$uhttps://xfel.tind.io/record/1569/files/weygbd2.pdf
000001569 8560_ $$fkurt.ament@xfel.eu
000001569 900__ $$aUndulator Systems
000001569 980__ $$aPROCEEDING