Fig. 8: Instrument function of the system. | Communications Physics

Fig. 8: Instrument function of the system.

From: Thermal transport in warm dense matter revealed by refraction-enhanced x-ray radiography with a deep-neural-network analysis

Fig. 8

a Determine the system instrument function with Au grid radiographs. The black curve is an average intensity lineout from eight Au grid radiographs and the shaded areas are the error bars. The blue line is the best fit when we convolute the theoretical intensity with an instrument function. We found that the instrument function is a Gaussian with an FWHM of 6.1 μm. b The blue curve is the measured RER lineout for an unheated target. The black dashed curve is the calculated intensity using an unperturbed step function as the density profile and a Gaussian with an FWHM of 6.1 μm as the instrument function. The red dashed curve is the intensity calculated using the extracted undriven density profile shown in Fig. 3 that best fits the data.

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