Three dimensional pure permanent magnet undulator design theory

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Description

Expressions for fields due to a point charge in 3D and due to a line charge in 2D are compared. Extensions to dipoles are made with emphasis on the relationship between dipole orientation and field component magnitudes. Differences between the effects on fields of dipole rotations in 2D and in 3D are highlighted and formulas for maximizing individual field components are given. A final macrogeometry extension is made and a closed-form expression is developed to calculate the field due to an arbitrary 3D configuration of permanent magnet (PM) blocks. The field optimization theory is applied to the design of the ... continued below

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4 p.

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Schlueter, R.D. & Marks, S. June 1, 1995.

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Description

Expressions for fields due to a point charge in 3D and due to a line charge in 2D are compared. Extensions to dipoles are made with emphasis on the relationship between dipole orientation and field component magnitudes. Differences between the effects on fields of dipole rotations in 2D and in 3D are highlighted and formulas for maximizing individual field components are given. A final macrogeometry extension is made and a closed-form expression is developed to calculate the field due to an arbitrary 3D configuration of permanent magnet (PM) blocks. The field optimization theory is applied to the design of the ALS elliptically polarizing undulator (EPU). Utilizing 3D field enhancement, peak on-axis field in practical designs can be increased typically by 5% to 40% or more over their 2D counterparts. The theory is generally applicable to any pure (i.e., no soft magnetic material) PM design.

Physical Description

4 p.

Notes

OSTI as DE96000146

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  • 14. international conference on magnet technology, Tampere (Finland), 11-16 Jun 1995

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  • Other: DE96000146
  • Report No.: LBL--37340
  • Report No.: LSGN--216;CONF-950691--17
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 108213
  • Archival Resource Key: ark:/67531/metadc620542

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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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  • June 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 5, 2016, 12:10 p.m.

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Schlueter, R.D. & Marks, S. Three dimensional pure permanent magnet undulator design theory, article, June 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc620542/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.