The intermediate energy X-ray beamline at the APS

McChesney, J. L.; Reininger, R.; Ramanathan, M.; Benson, C.; Srajer, G.; Abbamonte, P.; Campuzano, J. C.

doi:10.1016/j.nima.2014.01.068

The intermediate energy X-ray beamline at the APS

Journal Article · Tue Jan 14 00:00:00 EST 2014 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2014.01.068· OSTI ID:1958846

^[1]; Reininger, R. ^[2]; Ramanathan, M. ^[2]; Benson, C. ^[2]; Srajer, G. ^[2]; Abbamonte, P. ^[3]; Campuzano, J. C. ^[4]

Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); University of Illinois
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Univ. of Illinois at Urbana-Champaign, IL (United States)
Univ. of Illinois, Chicago, IL (United States)

In this work, we report the optical design of the Intermediate Energy X-ray (IEX) beamline at the APS, which has been optimized to study emergent phenomena via angle-resolved photoemission spectroscopy (ARPES) and resonant soft X-ray scattering (RSXS). Driven by the scientific requirements of these two techniques the beamline consists of two separate branchlines sharing the same source, heat absorbing optics and monochromator, but each having its own refocusing optics. The ARPES branch is optimized for a very high “resolving power” and a small spot at the sample; whereas, the RSXS branch is designed for high flux and a low beam divergence at the sample. The very high “resolving power” in the ARPES branch is achieved by using a monochromator which consists of a plane mirror and a variable line spacing grating that focuses the beam at all photon energies. A flux higher than 10¹⁰ photons/s at a “resolving power” better than 5×10⁴ will be available at the sample position of the ARPES beamline on a spot size (FWHM) smaller than 21×4 μm² (hor.×ver.) for photon energies between 250 and 1660 eV. A second grating will increase the flux by more than a factor of 10 at a “resolving power” of 10⁴. The flux expected at the RSXS branch for energies between 250 eV and 1900 eV is higher than 4×10¹² photons/s at “resolving power” around 2.5×10³. The expected spot in this branch is sub-millimeter and the beam divergence is less than 0.3 mrad (FWHM).

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Illinois at Urbana-Champaign, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357; FG02-06ER46285

OSTI ID:: 1958846

Alternate ID(s):: OSTI ID: 22313579

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 746; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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The intermediate energy X-ray beamline at the APS

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