Girder Alignment Plan Metadata
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Title
- Main Title Girder Alignment Plan
Creator
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Author: Wolf, ZacharyCreator Type: Personal
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Author: Ruland, RobertCreator Type: Personal
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Author: LeCocq, CatherineCreator Type: Personal
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Author: Lundahl, EricCreator Type: Personal
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Author: Levashov, YuriiCreator Type: Personal
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Author: Reese, EdCreator Type: Personal
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Author: Rago, CarlCreator Type: Personal
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Author: Poling, BenCreator Type: Personal
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Author: Schafer, DonaldCreator Type: Personal
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Author: Nuhn, Heinz-DieterCreator Type: Personal
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Author: Wienands, UliCreator Type: Personal
Contributor
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Sponsor: United States. Department of Energy. Office of Science.Contributor Type: OrganizationContributor Info: US DOE Office of Science (DOE SC)
Publisher
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Name: SLAC National Accelerator LaboratoryPlace 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
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Name: Office of Scientific & Technical Information Technical ReportsCode: OSTI
Institution
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Name: UNT Libraries Government Documents DepartmentCode: 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