Laser-driven powerful kHz hard x-ray source
A powerful hard x-ray source based on laser plasma interaction is developed. By introducing
the kHz, 800 nm pulses onto a rotating molybdenum (Mo) disk target, intense Mo K α x-rays
are emitted with suppressed bremsstrahlung background. Results obtained with different
laser intensities suggest that the dominant absorption mechanism responsible for the high
conversion efficiency is vacuum heating (VH). The high degree of spatial coherence is
verified. With the high average flux and a source size comparable to the laser focus spot …
the kHz, 800 nm pulses onto a rotating molybdenum (Mo) disk target, intense Mo K α x-rays
are emitted with suppressed bremsstrahlung background. Results obtained with different
laser intensities suggest that the dominant absorption mechanism responsible for the high
conversion efficiency is vacuum heating (VH). The high degree of spatial coherence is
verified. With the high average flux and a source size comparable to the laser focus spot …
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