@article{ad9f06a246a7459fb6543bfe1f8845e5,
title = "Multielement spectrometer for efficient measurement of the momentum transfer dependence of inelastic x-ray scattering",
abstract = "Nonresonant x-ray Raman scattering (XRS) is the inelastic scattering of hard x rays from the K shell of low-Z elements or the less tightly bound shells of heavier elements. In the limit of low momentum transfer q, XRS is determined by the same transition matrix element as is measured by x-ray absorption spectroscopies. However, XRS at higher q can often access higher order multipole transitions which help separate the symmetry of various contributions to the local density of states. The main drawback of XRS is its low cross section - a problem that is compounded for a q-dependent study. To address this issue, we have constructed a multielement spectrometer to simultaneously measure XRS at ten different values of q. By means of example, we report new measurements of the XRS from the L- and K-edges of Mg. This instrument is now available to general users at the Advanced Photon Source as the lower energy resolution inelastic x-ray scattering (LERIX) spectrometer.",
author = "Fister, {T. T.} and Seidler, {G. T.} and L. Wharton and Battle, {A. R.} and Ellis, {T. B.} and Cross, {J. O.} and Macrander, {A. T.} and Elam, {W. T.} and Tyson, {T. A.} and Q. Qian",
note = "Funding Information: This research was supported by DOE, Basic Energy Science, Office of Science, Contract Nos. DE-FGE03-97ER45628 and W-31-109-ENG-38, ONR Grant No. N00014-05-1-0843, and the Summer Research Institute program at the Pacific Northwest National Laboratory. The operation of Sector 20 PNC-CAT/XOR is supported by DOE Basic Energy Science, Office of Science, Contract No. DE-FG03-97ER45629, the University of Washington, and grants from the Natural Sciences and Engineering Research Council of Canada. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Basic Energy Sciences, Office of Science, under Contract No. W-31-109-Eng-38. The authors Ed Stern, John Rehr, Aleksi Soininen, Mike Vinton, Ron Musgrave, Larry Stark, Micah Prange, Josh Kas, and Yejun Feng for useful discussions in the design of the apparatus and the interpretation of the data. They thank Brian Venema for the design and construction of the motor driver unit. They also give special thanks to Peter Eng both for useful discussions and also for his kind guidance on the initial designs of our analyzer modules.",
year = "2006",
doi = "10.1063/1.2204581",
language = "English (US)",
volume = "77",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "6",
}