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A shimming technique for improvement of the spectral performance of APS Undulator A [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1996.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
12 pages : digital, PDF file
Additional Creators
Argonne National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The performance of insertion devices would achieve almost the ultimate level if a proper set of techniques could be developed to correct the magnetic field imperfections. It has been shown experimentally that the measured radiation characteristics of a magnetically fine-tuned insertion device are very close to those calculated for an ideal device. There are different techniques for correction of magnetic field errors. One used most often is a shimming technique capable of correcting both integrated and local field errors. In this note, some specific results of a shimming technique applied to APS insertion devices will be presented. This technique uses two types of shims: one for trajectory corrections and one for phase corrections. It has been demonstrated that trajectory shims could bring the rms phase errors to the level of 5 degrees, and the next shimming step when only phase shims are applied brings the rms phase errors as low as 1.5 degree.
Report Numbers
E 1.99:ls--253
ls--253
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/09/1996.
"ls--253"
"DE96006137"
Vasserman, I.
Funding Information
W-31109-ENG-38
View MARC record | catkey: 14691751