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

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

doi:10.1063/1.4959792

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

Rev Sci Instrum. 2016 Nov;87(11):11E524. doi: 10.1063/1.4959792.

Authors

L B Fletcher¹, U Zastrau², E Galtier¹, E J Gamboa¹, S Goede¹, W Schumaker¹, A Ravasio¹, M Gauthier¹, M J MacDonald¹, Z Chen¹, E Granados¹, H J Lee¹, A Fry¹, J B Kim¹, C Roedel¹, R Mishra¹, A Pelka³, D Kraus³, B Barbrel⁴, T Döppner⁵, S H Glenzer¹

Affiliations

¹ SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
² European XFEL, Schenefeld, Germany.
³ Helmholtz Zentrum Dresden-Rossendorf, Dresden, Germany.
⁴ Department of Physics, University of California Berkeley, Berkeley, California 94720, USA.
⁵ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

PMID: 27910564
DOI: 10.1063/1.4959792

Abstract

We present the first spectrally resolved measurements of x-rays scattered from cryogenic hydrogen jets in the single photon counting limit. The 120 Hz capabilities of the LCLS, together with a novel hydrogen jet design [J. B. Kim et al., Rev. Sci. Instrum. (these proceedings)], allow for the ability to record a near background free spectrum. Such high-dynamic-range x-ray scattering measurements enable a platform to study ultra-fast, laser-driven, heating dynamics of hydrogen plasmas. This measurement has been achieved using two highly annealed pyrolytic graphite crystal spectrometers to spectrally resolve 5.5 keV x-rays elastically and inelastically scattered from cryogenic hydrogen and focused on Cornell-SLAC pixel array detectors [S. Herrmann et al., Nucl. Instrum. Methods Phys. Res., Sect. A 718, 550 (2013)].