Magnetized plasma implosion in a snail target driven by a moderate-intensity laser pulse.

Area of Science:

• Plasma Physics
• Laser-Plasma Interactions
• Magnetized Plasmas

Background:

• Generating strong magnetic fields in plasma is crucial for various scientific and technological applications.
• Previous methods often require high laser intensities or complex experimental setups.
• Understanding plasma behavior under moderate intensity is key to developing efficient magnetization techniques.

Purpose of the Study:

• To investigate the optical generation of compact magnetized plasma structures.
• To explore plasma magnetization in the moderate intensity domain (around 10^16 W/cm^2).
• To analyze the resulting plasma density and magnetic field distributions.

Main Methods:

• Irradiation of snail-shaped targets with a sub-nanosecond laser beam.
• Utilizing optical diagnostics to observe plasma behavior.
• Characterizing the generated magnetic field and plasma density.

Main Results:

• A sub-megagauss magnetized plasmoid was successfully traced within the target.
• Hot plasma formation exhibited a theta-pinch-like density and magnetic field distribution.
• The magnetized plasma imploded into the target's interior on a hydrodynamic timescale.

Conclusions:

• A simple and effective scheme for optical plasma magnetization in the moderate intensity domain was demonstrated.
• The generated magnetized plasma structures have implications for astrophysical research.
• This technique holds promise for the development of future technologies requiring controlled magnetized plasmas.