Observation of subpicosecond x-ray emission from laser-cluster interaction

Area of Science:

• Atomic and Molecular Physics
• Plasma Physics
• X-ray Science

Background:

• Laser-matter interactions with clusters are complex.
• Ultrafast X-ray sources are crucial for scientific advancements.
• Previous studies lacked precise temporal resolution of cluster-based X-ray emission.

Purpose of the Study:

• To experimentally determine the duration of X-ray pulses from laser-irradiated clusters.
• To assess the suitability of clusters as debris-free targets for ultrafast X-ray applications.
• To validate experimental findings with theoretical calculations.

Main Methods:

• Irradiation of large Argon (Ar) clusters with intense, ultrashort laser pulses.
• Time-resolved measurement of K-shell X-ray emission (approx. 3 keV).
• Comparison of experimental results with hydrodynamical and collisional-radiative models.

Main Results:

• Experimental evidence of subpicosecond X-ray pulse duration from laser-irradiated clusters.
• Demonstration of debris-free X-ray generation.
• Confirmation of extremely short X-ray pulse durations through theoretical calculations.

Conclusions:

• Laser-irradiated clusters provide a viable debris-free target for generating ultrafast X-ray pulses.
• The demonstrated subpicosecond X-ray pulse duration is suitable for advanced X-ray science applications.
• Theoretical models accurately predict the short X-ray pulse durations observed experimentally.