Tests of Coordinate Transfer from Magnetic to Mechanical Reference for LCLS Undulator Fiducialization

Levashov, Yu.

关键词: ALGORITHMS;    CALIBRATION;    QUADRUPOLES;    WIGGLER MAGNETS;    LIGHT SOURCES;    FREE ELECTRON LASERS;    LINEAR ACCELERATORS;    MEASURING METHODS;    PERFORMANCE XFEL;   

DOI  :  10.2172/1000390
RP-ID  :  SLAC-TN-10-088
PID  :  OSTI ID: 1000390
Others  :  TRN: US1100102

美国|英语

来源: SciTech Connect

【 摘 要 】

Fiducialization of the LCLS undulators will be based on magnetic measurements by Hall probe. Pointed magnets, proposed by I.Vasserman for quadrupole lens fiducialization will be used as an intermediate reference. A prototype of the pointed magnet fixture has been made and tested. In this note we will describe a procedure for measuring the position of the center of the Hall probe sensitive area with respect to the undulator fiducial marks. The pointed magnet calibration procedure, a two-point algorithm for locating the magnetic center of the fixture, and test results are presented.