Near-Edge X-Ray Absorption Fine Structure Spectroscopy of Agarose with a Compact Laser Plasma Soft X-Ray Source

In this work, we demonstrate near-edge X-ray absorption fine structure spectroscopy of agarose with a compact laboratory laser-plasma soft X-ray source. The source is based on a double stream gas puff target irradiated by nanosecond laser pulses. The emission spectra of the source and the absorption spectra of the investigated sample were measured simultaneously using a flat-field spectrometer. Soft X-ray emission from a krypton/helium target in the range between 1.5 and 5 nm was applied as the source. The transmission measurements revealed the specific spectral features near the carbon K - alpha absorption edge corresponding well to the results obtained with synchrotron radiation.