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Undulator A characteristics and specifications: Enhanced capabilities

Technical Report ·
DOI:https://doi.org/10.2172/10150807· OSTI ID:10150807
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The Undulator A for the Advanced Photon Source (APS) is a planar insertion device that will generate high-intensity x-ray radiation in the spectral range 3.2 keV to 45 keV by using the first, third, and fifth harmonics of radiation. The device has been optimized for the APS so that the variation in brilliance is small when tuning from one harmonic energy to the next. This has been achieved by an increase of the magnetic field for a given gap and by allowing a smaller minimum gap when installed in the storage ring. This document describes the modifications of the magnetic structure and the enhanced on-axis magnetic fields. The enhanced spectral performance is discussed and illustrated in tuning curves for the brilliance and the flux through apertures of different sizes. The increased power and power densities are described and also discussed in relation to selecting a proper sized aperture for an experiment. The spatial photon distribution is shown in figures at selected energies that clearly indicate the size of the central cone of radiation. This document is intended as a practical guide to aid in the design of beamlines for Undulator A. Therefore, expanded sections describing the spatial photon distributions and the emitted power are included with graphs that can be used for accurate estimates of the beamsize and power loads.
Research Organization:
Argonne National Lab., IL (United States). Advanced Photon Source Accelerator Systems Div.
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
10150807
Report Number(s):
ANL/APS/TB--17; ON: DE94012058
Country of Publication:
United States
Language:
English

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Related Subjects

43 PARTICLE ACCELERATORS
430303
430400
ACCELERATOR FACILITIES
ADVANCED PHOTON SOURCE
BEAM TRANSPORT
EXPERIMENTAL FACILITIES AND EQUIPMENT
MAGNETIC FIELDS
MODIFICATIONS
PERFORMANCE
STORAGE RINGS
WIGGLER MAGNETS
X RADIATION