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https://www.readbyqxmd.com/read/25273706/bent-crystal-spectrometer-for-both-frequency-and-wavenumber-resolved-x-ray-scattering-at-a-seeded-free-electron-laser
#1
Ulf Zastrau, Luke B Fletcher, Eckhart Förster, Eric Ch Galtier, Eliseo Gamboa, Siegfried H Glenzer, Philipp Heimann, Heike Marschner, Bob Nagler, Andreas Schropp, Ortrud Wehrhan, Hae Ja Lee
We present a cylindrically curved GaAs x-ray spectrometer with energy resolution ΔE/E = 1.1 × 10(-4) and wave-number resolution of Δk/k = 3 × 10(-3), allowing plasmon scattering at the resolution limits of the Linac Coherent Light Source (LCLS) x-ray free-electron laser. It spans scattering wavenumbers of 3.6 to 5.2/Å in 100 separate bins, with only 0.34% wavenumber blurring. The dispersion of 0.418 eV/13.5 μm agrees with predictions within 1.3%. The reflection homogeneity over the entire wavenumber range was measured and used to normalize the amplitude of scattering spectra...
September 2014: Review of Scientific Instruments
https://www.readbyqxmd.com/read/10043642/stability-of-disruption-precursors-in-a-tokamak-following-controlled-change-of-wall-boundary-conditions
#2
Roberts, Fletcher, Nothnagel, Sherwell, de Villiers JA, McLoud
No abstract text is available yet for this article.
June 3, 1991: Physical Review Letters
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