Ultrafast electron and proton bunches correlation in laser-solid matter experiments

Area of Science:

• Plasma Physics
• Laser-Matter Interaction
• Particle Acceleration

Background:

• Ultra-intense laser interactions with solid targets produce high-energy particle beams.
• The target normal sheath acceleration (TNSA) model describes proton and ion beam generation.
• Relativistic ultrafast electron emission precedes proton acceleration.

Purpose of the Study:

• To investigate the correlation between ultrafast electron emission and proton acceleration.
• To validate the TNSA model under specific experimental conditions.
• To demonstrate simultaneous detection of electrons and protons.

Main Methods:

• Utilizing ultra-intense laser pulses interacting with solid state targets.
• Employing electro-optical sampling for ultrafast electron detection.
• Using time-of-flight diagnostics for proton and ion beam analysis.
• Performing numerical simulations for theoretical validation.

Main Results:

• Simultaneous detection of relativistic ultrafast electrons and multi-MeV protons was achieved.
• Experimental data showed strong correlations between electron emission timing and proton acceleration.
• Numerical simulations provided excellent agreement with experimental observations.

Conclusions:

• The study confirms the link between ultrafast electron dynamics and proton acceleration in laser-driven plasmas.
• Experimental and simulation results support the TNSA model's applicability.
• Advanced diagnostics enable comprehensive analysis of laser-driven particle acceleration processes.