A shimming technique for improvement of the spectral performance of APS Undulator A

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Description

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 ... continued below

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12 p.

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Vasserman, I. January 9, 1996.

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Description

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.

Physical Description

12 p.

Notes

INIS; OSTI as DE96006137

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  • Other Information: PBD: 9 Jan 1996

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  • Other: DE96006137
  • Report No.: LS--253
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/206558 | External Link
  • Office of Scientific & Technical Information Report Number: 206558
  • Archival Resource Key: ark:/67531/metadc670078

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 9, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 29, 2016, 7 p.m.

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Vasserman, I. A shimming technique for improvement of the spectral performance of APS Undulator A, report, January 9, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc670078/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.