Streaked sub-ps-resolution x-ray line shapes and implications for solid-density plasma dynamics (invited)

Area of Science:

• Plasma physics
• Spectroscopy
• X-ray diagnostics

Background:

• Studying hot, solid-density plasmas requires advanced diagnostic techniques capable of capturing rapid temporal evolution.
• Traditional methods may lack the temporal resolution needed for high-energy-density plasma phenomena.

Purpose of the Study:

• To develop and validate a time-resolved spectroscopic method for analyzing hot, solid-density plasmas.
• To enable measurements of plasma parameters on picosecond timescales.

Main Methods:

• Coupling a high-resolution x-ray spectrometer with an ultrafast x-ray streak camera.
• Utilizing a Bragg crystal for enhanced throughput and ray tracing for alignment.
• Implementing time-calibration and dewarping techniques for accurate spectral reconstruction.

Main Results:

• Generation of single-shot, time-resolved spectra from laser-produced plasmas.
• Observation of spectral feature evolution on picosecond timescales.
• Demonstration of sufficient reproducibility for accumulating photon statistics.

Conclusions:

• The developed technique is feasible for measuring plasma parameters on rapid timescales.
• This method advances the study of high-energy-density plasmas.
• Time-resolved x-ray spectroscopy provides critical insights into dynamic plasma behavior.