Speaker
Mr
Yurii Levashov
(SLAC, Stanford)
Description
Fiducialization of LCLS undulators is based on magnetic field measurements by Hall
probe. In this paper we discuss the fiducialization procedure, method and accuracy
of
coordinate transfer from center of the Hall probe sensitive area to the undulator
fiducial marks. Pointed magnets or "magnetic needles", proposed by Isaak
Vasserman[1], are used as an intermediate reference. A prototype of the intermediate
reference fixture has been fabricated and tested. The pointed magnets calibration
procedure, a special algorithm for locating the magnetic center of the fixture, and
test results are also presented.
Author
Mr
Yurii Levashov
(SLAC, Stanford)
Co-author
Mr
Zachary Wolf
(SLAC, Stanford)
