Irradiation of Nd-Fe-B permanent magnets with APS bending magnet x-rays and {sup 60}Co {gamma}-rays

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The Advanced Photon Source (APS), as well as other third-generation synchrotron light sources, uses permanent magnets in the insertion devices to produce x-rays for scientific research. When placed in a high-energy storage ring, these permanent magnets are subjected to irradiation from synchrotron radiation, high-energy bremsstrahlung, and bremsstrahlung-produced photoneutrons. Previous investigations have exhibited varying degrees of degradation in the intensity of magnetization of these magnets due to irradiation from electron beams, {sup 60}Co {gamma}rays, and high-energy neutrons. The APS specifically uses Nd-Fe-B permanent magnets in their insertion devices. Although no detectable radiation-induced demagnetization has been observed in the APS insertion devices ... continued below

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27 pages

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Alderman, J.; Job, P. K. & Puhl, J. September 8, 2000.

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Description

The Advanced Photon Source (APS), as well as other third-generation synchrotron light sources, uses permanent magnets in the insertion devices to produce x-rays for scientific research. When placed in a high-energy storage ring, these permanent magnets are subjected to irradiation from synchrotron radiation, high-energy bremsstrahlung, and bremsstrahlung-produced photoneutrons. Previous investigations have exhibited varying degrees of degradation in the intensity of magnetization of these magnets due to irradiation from electron beams, {sup 60}Co {gamma}rays, and high-energy neutrons. The APS specifically uses Nd-Fe-B permanent magnets in their insertion devices. Although no detectable radiation-induced demagnetization has been observed in the APS insertion devices so far, partial demagnetization has been observed in at least one insertion device at the European Synchrotron Radiation Facility (ESRF), where Nd-Fe-B permanent magnets are also used.

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27 pages

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  • Other Information: PBD: 8 Sep 2000

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  • Report No.: LS-288
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/764212 | External Link
  • Office of Scientific & Technical Information Report Number: 764212
  • Archival Resource Key: ark:/67531/metadc722201

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  • September 8, 2000

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • March 29, 2016, 7:54 p.m.

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Alderman, J.; Job, P. K. & Puhl, J. Irradiation of Nd-Fe-B permanent magnets with APS bending magnet x-rays and {sup 60}Co {gamma}-rays, report, September 8, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc722201/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.