Girder Alignment Plan Metadata

Metadata describes a digital item, providing (if known) such information as creator, publisher, contents, size, relationship to other resources, and more. Metadata may also contain "preservation" components that help us to maintain the integrity of digital files over time.

Title

  • Main Title Girder Alignment Plan

Creator

  • Author: Wolf, Zachary
    Creator Type: Personal
  • Author: Ruland, Robert
    Creator Type: Personal
  • Author: LeCocq, Catherine
    Creator Type: Personal
  • Author: Lundahl, Eric
    Creator Type: Personal
  • Author: Levashov, Yurii
    Creator Type: Personal
  • Author: Reese, Ed
    Creator Type: Personal
  • Author: Rago, Carl
    Creator Type: Personal
  • Author: Poling, Ben
    Creator Type: Personal
  • Author: Schafer, Donald
    Creator Type: Personal
  • Author: Nuhn, Heinz-Dieter
    Creator Type: Personal
  • Author: Wienands, Uli
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Office of Science.
    Contributor Type: Organization
    Contributor Info: US DOE Office of Science (DOE SC)

Publisher

  • Name: SLAC National Accelerator Laboratory
    Place of Publication: California

Date

  • Creation: 2010-11-18

Language

  • English

Description

  • Content Description: The girders for the LCLS undulator system contain components which must be aligned with high accuracy relative to each other. The alignment is one of the last steps before the girders go into the tunnel, so the alignment must be done efficiently, on a tight schedule. This note documents the alignment plan which includes efficiency and high accuracy. The motivation for girder alignment involves the following considerations. Using beam based alignment, the girder position will be adjusted until the beam goes through the center of the quadrupole and beam finder wire. For the machine to work properly, the undulator axis must be on this line and the center of the undulator beam pipe must be on this line. The physics reasons for the undulator axis and undulator beam pipe axis to be centered on the beam are different, but the alignment tolerance for both are similar. In addition, the beam position monitor must be centered on the beam to preserve its calibration. Thus, the undulator, undulator beam pipe, quadrupole, beam finder wire, and beam position monitor axes must all be aligned to a common line. All relative alignments are equally important, not just, for example, between quadrupole and undulator. We begin by making the common axis the nominal beam axis in the girder coordinate system. All components will be initially aligned to this axis. A more accurate alignment will then position the components relative to each other, without incorporating the girder itself.
  • Physical Description: 19 p.; ill.

Subject

  • Keyword: Calibration
  • STI Subject Categories: 43 Particle Accelerators
  • Keyword: Quadrupoles
  • Keyword: Efficiency
  • Keyword: Physics
  • Keyword: Beam Position
  • Keyword: Wiggler Magnets
  • Keyword: Monitors
  • Keyword: Alignment
  • Keyword: Accuracy
  • Keyword: Tolerance

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Report No.: SLAC-TN-10-040
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/992866
  • Office of Scientific & Technical Information Report Number: 992866
  • Archival Resource Key: ark:/67531/metadc1014816

Note

  • Display Note: http://www-public.slac.stanford.edu/SciDoc/docMeta.aspx?slacPubNumber=slac-tn-10-040
Back to Top of Screen