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

Levashov, Yu.

SLAC National Accelerator Laboratory

关键词: Calibration;    Light Sources;    Measuring Methods;    43 Particle Accelerators;    Performance Xfel;   

DOI  :  10.2172/1000390
RP-ID  :  SLAC-TN-10-088
RP-ID  :  AC02-76SF00515
RP-ID  :  1000390

美国|英语

来源: UNT Digital Library

【 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.