X-ray phase contrast imaging of spherical capsules

Area of Science:

• * Physics
• * Laser-driven fusion research
• * X-ray science

Background:

• * Inertial Confinement Fusion (ICF) requires precise understanding of laser-target interactions.
• * Current imaging techniques often lack the temporal resolution to capture ultrafast dynamics.

Purpose of the Study:

• * To demonstrate a laser-based synchrotron X-ray source for ICF target imaging.
• * To establish its potential for real-time, ultrafast characterization of laser-driver interactions.

Main Methods:

• * Utilized a 160 TW high-power laser system (3.2 J, 20 fs) incident on a supersonic gas jet.
• * Generated X-rays at a 2.5 Hz repetition rate.
• * Achieved a spatial resolution of 4.3 μm in the object plane.

Main Results:

• * Produced 2.7 × 10^9 photons/0.1% BW/sr/shot at 10 keV.
• * Successfully imaged spherical capsules, similar to ICF targets, in a single laser shot.
• * Demonstrated experimental retrieval of phase information.

Conclusions:

• * The laser-based synchrotron X-ray source is a viable tool for ultrafast ICF target imaging.
• * This technology offers potential for real-time diagnostics of laser-driven fusion processes.