High resolution x-ray Thomson scattering measurements from cryogenic hydrogen jets using the linac coherent light source


High resolution x-ray Thomson scattering measurements from cryogenic hydrogen jets using the linac coherent light source

Fletcher, L. B.; Zastrau, U. B.; Galtier, E. A.; Gamboa, E. J. A.; Goede, S. A.; Schumaker, W. A.; Ravasio, A. A.; Gauthier, M. A.; Macdonald, M. J. A.; Chen, Z. A.; Granados, E. A.; Lee, H. J. A.; Fry, A. A.; Kim, J. B. A.; Roedel, C. A.; Mishra, R. A.; Pelka, A. F.; Kraus, D.; Barbrel, B. G.; Döppner, T. H.; Glenzer, S. H. A.

We present the first spectrally resolved measurements of x-rays scattered from cryogenic hydrogenjets in the single photon counting limit. The 120 Hz capabilities of the LCLS, together with a novelhydrogen jet design [J. B. Kimet al., Rev. Sci. Instrum. (these proceedings)], allow for the ability torecord a near background free spectrum. Such high-dynamic-range x-ray scattering measurementsenable a platform to study ultra-fast, laser-driven, heating dynamics of hydrogen plasmas. Thismeasurement has been achieved using two highly annealed pyrolytic graphite crystal spectrometers tospectrally resolve 5.5 keV x-rays elastically and inelastically scattered from cryogenic hydrogen andfocused on Cornell-SLAC pixel array detectors [S. Herrmannet al., Nucl. Instrum. Methods Phys.Res., Sect. A718, 550 (2013)].

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Publ.-Id: 24077