Dynamic control of laser driven electron acceleration in a photonic structure using programmable optical pulses.

Area of Science:

• Physics
• Optical Engineering
• Particle Accelerators

Background:

• Precision control of optical pulse phase profiles is achievable with advanced optical techniques.
• Shaping laser pulse field profiles can influence electron dynamics in photonic accelerating structures.

Purpose of the Study:

• To implement dynamic control of a laser accelerator using programmable phase and amplitude modulation.
• To demonstrate live tuning capabilities for accelerator beam dynamics and performance optimization.

Main Methods:

• Utilizing a liquid-crystal mask to program the phase and amplitude of an infrared laser pulse.
• Implementing a pulse front tilt scheme in conjunction with the liquid-crystal mask.
• Applying these techniques to a laser accelerator composed of precisely aligned dielectric gratings.

Main Results:

• Achieved dynamic control over laser accelerator beam dynamics with nearly limitless live tuning.
• Demonstrated software-based correction of structural and optical front imperfections.
• Implemented transverse focusing schemes and controlled output beam energy and charge.
• Optimized interaction length, resulting in measured energy gains up to 0.55 MeV.

Conclusions:

• Dynamic control of laser accelerators is feasible through programmable phase/amplitude modulation and pulse front tilt.
• This approach offers versatile tuning for accelerator performance, including beam focusing and energy control.
• The demonstrated technique enables software-based correction of imperfections and optimization of particle acceleration.