skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Sharpness of interference pattern of the 3-pole wiggler

Abstract

Due to the small emittance, radiation from neighboring poles of a strong wiggler in future multi-bend achromat-based storage rings can exhibit sharp interference patterns. The spectral-angular distributions of the 3-pole wiggler for the proposed Advanced Photon Source (APS) upgrade were computed and prominent interference patterns were found. In this paper we provide an understanding of such interference patterns. The equations governing the interference pattern are described and computed spectral-angular distributions of a modeled 3-pole wiggler magnetic field using these equations are presented.

Authors:
;  [1]
  1. The Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)
Publication Date:
OSTI Identifier:
22608310
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; ANGULAR DISTRIBUTION; INTERFERENCE; MAGNETIC FIELDS; PHOTONS; WIGGLER MAGNETS

Citation Formats

Dejus, Roger J., E-mail: dejus@aps.anl.gov, and Kim, Kwang-Je. Sharpness of interference pattern of the 3-pole wiggler. United States: N. p., 2016. Web. doi:10.1063/1.4952794.
Dejus, Roger J., E-mail: dejus@aps.anl.gov, & Kim, Kwang-Je. Sharpness of interference pattern of the 3-pole wiggler. United States. doi:10.1063/1.4952794.
Dejus, Roger J., E-mail: dejus@aps.anl.gov, and Kim, Kwang-Je. 2016. "Sharpness of interference pattern of the 3-pole wiggler". United States. doi:10.1063/1.4952794.
@article{osti_22608310,
title = {Sharpness of interference pattern of the 3-pole wiggler},
author = {Dejus, Roger J., E-mail: dejus@aps.anl.gov and Kim, Kwang-Je},
abstractNote = {Due to the small emittance, radiation from neighboring poles of a strong wiggler in future multi-bend achromat-based storage rings can exhibit sharp interference patterns. The spectral-angular distributions of the 3-pole wiggler for the proposed Advanced Photon Source (APS) upgrade were computed and prominent interference patterns were found. In this paper we provide an understanding of such interference patterns. The equations governing the interference pattern are described and computed spectral-angular distributions of a modeled 3-pole wiggler magnetic field using these equations are presented.},
doi = {10.1063/1.4952794},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • Due to the small emittance, radiation from neighboring poles of a strong wiggler in future multi-bend achromat-based storage rings can exhibit sharp interference patterns. The spectral-angular distributions of the 3-pole wiggler for the proposed Advanced Photon Source (APS) upgrade were computed and prominent interference patterns were found. In this paper we provide an understanding of such interference patterns. The equations governing the interference pattern are described and computed spectral-angular distributions of a modeled 3-pole wiggler magnetic field using these equations are presented.
  • A new superconducting vertical wiggler was installed in the 2.5 GeV KEK-PF ring in Sept. 1989 and has been operated as a generator of a synchrotron radiation since Oct. 1989. Characteristics of the wiggler are reported here. The wiggler has five magnet poles with a maximum field strength of 5 T along the beam orbit. The wiggler is operated in a permanent current mode and consumes liquid helium of 0.12{plus minus}0.02 l/h. An orbit distortion due to the decrease of the exciting current in the permanent current mode which comes from resistance of junctions between coils and PCSs is correctedmore » by two normal steering magnets. The wiggler is operated continuously without supplying any current for a few weeks.« less
  • A five-pole superconducting wiggler has been installed in the DCI positron ring and operated without disturbing the machine characteristics at full energy (1.85 GeV) and maximum current (300 mA). Three beamlines have been built which feed six beam ports. The first two-crystal monochromator to be used for Compton scattering has been commissioned although the sagittal focusing has not yet been tested.
  • The design considerations and technical details for components of the front end of a Photon Factory 53-pole wiggler/undulator beamline are described. Special attention is paid to the handling of the high-power densities produced by the wiggler.
  • The necessity of extending the useful spectrum of synchrotron radiation at higher energies (> 10 keV) for X-Ray Diffraction applications was the reason for developing and constructing a novel superconducting insertion device the Elettra storage ring. The superconducting wiggler with 45 full poles and a field strength of 3.5 T, 16.5 mm magnetic gap and a period of 64 mm has been developed and produced by the Budker Institute of Nuclear Physics SB RAS. This article describes some technical properties and characteristics of the wiggler as well as the results of the wiggler tests.