Two-color monochromatic x-ray imaging with a single short-pulse laser

Area of Science:

• Plasma Physics
• X-ray Imaging
• Laser-driven Science

Background:

• Monochromatic X-ray imaging is crucial for diagnosing high-energy density plasmas.
• Producing multiple X-ray energies simultaneously from a single event is challenging.

Purpose of the Study:

• To present a novel method for simultaneous monochromatic X-ray imaging at two distinct photon energies.
• To demonstrate the application of this technique for Kα X-ray fluorescence imaging using laser-produced plasmas.

Main Methods:

• Irradiation of a layered titanium-copper target with a 50 TW short-pulse laser.
• Utilizing MeV fast electrons for Kα fluorescence induction in both foils.
• Employing two energy-selective curved crystals to form separate monochromatic images on a single detector.

Main Results:

• Successful simultaneous monochromatic imaging at 4.5 and 8.0 keV on a single detector.
• Demonstrated Kα X-ray production at two different photon energies from a single laser beam.
• Validated the diagnostic technique for X-ray radiography of high-density plasmas.

Conclusions:

• The presented technique offers a powerful tool for simultaneous dual-energy X-ray imaging.
• This method advances diagnostics for laser-driven experiments and plasma research.
• The approach is applicable to various radiography applications requiring multi-energy X-ray information.