Excitation and Control of Plasma Wakefields by Multiple Laser Pulses

Area of Science:

• Plasma Physics
• Accelerator Physics
• Laser-Plasma Interactions

Background:

• Laser-plasma accelerators offer a path to compact, high-gradient particle acceleration.
• Controlling plasma wave excitation and damping is crucial for accelerator efficiency and stability.

Purpose of the Study:

• To experimentally demonstrate resonant excitation of plasma waves using laser pulse trains.
• To show the possibility of damping plasma waves with a trailing laser pulse for energy recovery.
• To validate experimental results with theoretical and numerical models.

Main Methods:

• Experimental setup involving trains of laser pulses interacting with plasma.
• Measurement of laser wakefields generated in the plasma.
• Comparison of experimental data with analytical and numerical simulations of wakefield excitation.

Main Results:

• Successful resonant excitation of plasma waves was achieved.
• Demonstrated damping of plasma waves by an out-of-resonance trailing laser pulse.
• Experimental laser wakefield measurements showed excellent agreement with linear regime models.

Conclusions:

• The results present a promising approach for developing controlled, GeV-scale laser-plasma accelerators.
• Achieving multikilohertz repetition rates for such accelerators is a potential outcome.
• This research advances the development of energy recovery plasma accelerators.