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

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Description

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.

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Levashov, Yu. December 13, 2010.

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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.

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  • Report No.: SLAC-TN-10-088
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/1000390 | External Link
  • Office of Scientific & Technical Information Report Number: 1000390
  • Archival Resource Key: ark:/67531/metadc833719

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  • December 13, 2010

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

Description Last Updated

  • Dec. 2, 2016, 3:20 p.m.

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Levashov, Yu. Tests of Coordinate Transfer from Magnetic to Mechanical Reference for LCLS Undulator Fiducialization, report, December 13, 2010; United States. (digital.library.unt.edu/ark:/67531/metadc833719/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.