Reflective multilayer optic as hard X-ray diagnostic on laser-plasma experiment

Area of Science:

• Plasma physics
• X-ray optics
• Laser-driven experiments

Background:

• Laser-plasma experiments generate complex X-ray spectra.
• Accurate X-ray diagnostics are crucial for understanding these experiments.
• Traditional methods like transmission crystal spectrometers have limitations.

Purpose of the Study:

• To evaluate a multilayer optic for X-ray diagnostics in laser-plasma experiments.
• To assess the optic's ability to selectively pass X-rays within a specific energy range.
• To compare the performance of the multilayer optic against existing technologies.

Main Methods:

• A multilayer optic was designed and fabricated.
• The optic was integrated into a laser-plasma experimental setup.
• X-ray spectra were measured and analyzed.
• A multilayer response model was developed, incorporating source size and spectral content.

Main Results:

• The multilayer optic selectively passed X-rays between 55 and 100 keV.
• An order of magnitude improvement in signal-to-noise ratio was achieved compared to a transmission crystal spectrometer.
• The developed model accurately predicted the optic's performance.

Conclusions:

• Multilayer optics offer a superior alternative for X-ray diagnostics in laser-plasma experiments.
• The technology shows promise for applications at higher energies (above 500 keV).
• Further development of multilayer optics could enhance our understanding of high-energy phenomena.