Alignment of the VISA Undulator

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Description

The Visible-Infrared SASE Amplifier (VISA) undulator consists of four 99cm long segments. Each undulator segment is set up on a pulsed-wire bench, to characterize the magnetic properties and to locate the magnetic axis of the FODO array. Subsequently, the location of the magnetic axis, as defined by the wire, is referenced to tooling balls on each magnet segment by means of a straightness interferometer. After installation in the vacuum chamber, the four magnet segments are aligned with respect to themselves and globally to the beam line reference laser. A specially designed alignment fixture is used to mount one straightness interferometer ... continued below

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Ruland, Robert April 15, 1999.

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Description

The Visible-Infrared SASE Amplifier (VISA) undulator consists of four 99cm long segments. Each undulator segment is set up on a pulsed-wire bench, to characterize the magnetic properties and to locate the magnetic axis of the FODO array. Subsequently, the location of the magnetic axis, as defined by the wire, is referenced to tooling balls on each magnet segment by means of a straightness interferometer. After installation in the vacuum chamber, the four magnet segments are aligned with respect to themselves and globally to the beam line reference laser. A specially designed alignment fixture is used to mount one straightness interferometer each in the horizontal and vertical plane of the beam. The goal of these procedures is to keep the combined rms trajectory error, due to magnetic and alignment errors, to 50{micro}m.

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  • Other Information: PBD: 15 Apr 1999

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  • Report No.: SLAC-PUB-8086
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/10198 | External Link
  • Office of Scientific & Technical Information Report Number: 10198
  • Archival Resource Key: ark:/67531/metadc625915

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  • April 15, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 2, 2016, 6:39 p.m.

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Ruland, Robert. Alignment of the VISA Undulator, report, April 15, 1999; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc625915/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.