<br/>We present a calibration method for ultrafast gas phase x-ray scattering from polarized radiation sources that requires no standard atomic or molecular scatterers, nor an independent measurement of the detector distance. Ultrafast scattering experiments were performed at the Linac Coherent Light Source (LCLS) at SLAC National Accelerator Laboratory on two systems, N-methylmorpholine (NMM) and 1,3-cyclohexadiene (CHD), which is a model system for organic ring opening reactions. Each experimental scattering image is fit to a theoretical image, generated using the Independent Atom Model, although the exact form of this model is not essential. Because the x-rays are linearly polarized, the distance of the detector from the sample cell, the centering of the detector, and its azimuthal angle with respect to the x-ray polarization are optimized by minimizing the difference between the two-dimensional theoretical and experimental images. This method is applicable to a wide range of molecules.

Self-consistent internal calibration of x-ray scattering patterns from polarized radiation sources

256th National Meeting (2018)

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