TY - CPAPER
AU - Li, Y.
AU - Pflüger, J.
TI - Control of Gap Dependent Phase Errors on the Undulator Segments for the European XFEL
J2 - Proc. of FEL2015
AB - Strong magnetic forces in long undulators always result in some girder deformation. This problem gets more serious in long gap tuneable undulators. In addition the deformation varies with changing forces at different gaps resulting in gap dependent phase errors. For the undulators for the European XFEL this problem has been studied thoroughly and quantitatively. A compensation method is presented which uses a combination of suitable shims and pole height tuning. It is exemplified by tuning one of the undulator segments for the European XFEL back to specs.
PB - JACoW
CY - Geneva, Switzerland
SP - 685
EP - 689
KW - undulator
KW - laser
KW - electron
KW - free-electron-laser
KW - FEL
DA - 2015/12
PY - 2015
SN - 978-3-95450-134-2
DO - 10.18429/JACoW-FEL2015-WEP054
UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep054.pdf
ER -