Abstract
Ultrafast X-ray spectroscopy has recently been defined revolutionary in chemical dynamics [1], but despite the above-mentioned excellent progress, its full potential still needs to be uncovered. A significant challenge in X-ray spectroscopy is the ability to measure very small changes of the absorption near the K-edges of the atomic elements [2] under investigation with a very high signal to noise ratio. Schemes with high detection efficiency in the soft X-ray spectral range and high-speed readout for “pump-on” and “pump-off” measurements are a prerequisite for the success of these experiments with low photon-flux tabletop sources.
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