Journal Article

PUBDB-2017-00362

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Transfer of the Magnetic Axis of an Undulator to Mechanical Fiducial Marks of a Laser Tracker System

Ketenoğlu, B.XFEL.EU* ; Englisch, U.XFEL.EU* ; Li, Y.XFEL.EU* ; Wolff-Fabris, F.XFEL.EU* ; Benecke, W.DESY* ; Noak, M.DESY* ; Prenting, J.DESY* ; Pflueger, J. (Corresponding author)XFEL.EU* ; Schloesser, M.XFEL.EU*DESY*

2016
North-Holland Publ. Co. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.nima.2015.11.055  doi:10.3204/PUBDB-2017-00362

Abstract: The exact geometric location of the magnetic centers of sensors or sensor systems using Hall probes or pick-up coils is usually not known with high precision. In order to transfer the high spatial accuracy of magnetic measurements to external mechanic fiducials a device called “Magnetic Landmark” was developed and is described in this report. Its purpose is to establish the exact relation between “magnetic” coordinates used on magnetic measurement systems and “mechanic” coordinates used for alignment.The landmark consists of a permanent magnet configuration, which generates a field distribution with well-defined zero crossings in two orthogonal directions, which can be exactly localized with micrometer precision using magnetic measurement systems. For the “mechanic” measurements several redundant monuments for laser fiducials can be used.Using flip tests for the magnetic as well as mechanic measurements the center positions are determined in magnetic and mechanic coordinates. Using them the relation between the magnetic and surveying coordinates can be established with high accuracy.This report concentrates on the description of the landmark. A thorough analysis on achievable accuracy is presented. The method was developed for the alignment of the 91 undulator segments needed for the European XFEL but can be applied to other magnet systems as well.

Note: (c) Elsevier B.V.

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Contributing Institute(s):

1. European XFEL (Eur.XFEL)
2. Vermessung (MEA2)

Research Program(s):

1. 631 - Accelerator R & D (POF3-631) (POF3-631)
2. 6G13 - XFEL (POF3-622) (POF3-622)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2016

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Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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