Abstract
X-ray emission and possibility of obtaining radiography images with laser plasma X-ray source operating at atmospheric pressure and room temperature is investigated. Table top 40 fs 100 uJ laser and Cu and Fe bulk metal targets were used to produce X-ray emission in spectral range of 3–10 keV. The spectra, yield and size of X-ray source were measured under different experimental conditions. X-ray photons of up to 10 keV energy are produced effectively even by relatively low laser intensity < 1015 W/cm2. The source is applied for absorption imaging provided the sensitivity on 10 μm sample thickness and 30 μm spatial resolution of microstructures. The ability to perform phase contrast measurements is demonstrated. The advantages of the proposed method are in smart setup of investigated object within air environment; spectral range tunability; and sensitivity to low-contrast or micron thin details.
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