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Laser Proton Acceleration from a Near-Critical Imploding Gas Target.

Omri Seemann¹, Yang Wan², Sheroy Tata¹

¹Department of Physics of Complex Systems, <a href="https://ror.org/0316ej306">Weizmann Institute of Science</a>, Rehovot 7610001, Israel.

Physical Review Letters

|July 29, 2024

Summary

This summary is machine-generated.

Researchers developed a novel method for laser-driven proton acceleration using gas targets. This technique achieves critical plasma density with precise gradients, enabling stable, monoenergetic proton beams for advanced applications.

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Direct Imaging of Laser-driven Ultrafast Molecular Rotation

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Area of Science:

Plasma Physics
Laser-Induced Acceleration
High-Energy Particle Beams

Background:

Efficient laser-plasma energy coupling is crucial for laser-driven proton acceleration.
Achieving critical plasma density with micron-scale gradients in gas targets is challenging for high-repetition-rate applications.

Purpose of the Study:

To present a novel scheme for controlling gas target density profiles for enhanced laser-plasma interaction.
To demonstrate stable and efficient laser-driven proton acceleration using shaped gas targets.

Main Methods:

Utilizing optical laser pulses to transversely shape gas targets and create colliding shock waves.
Experimentation in both planar and cylindrical geometries with 1.5 J on-target laser pulses.

Main Results:

Demonstrated stable proton acceleration with monoenergetic distributions up to 5 MeV.
Achieved particle numbers exceeding 10^8 Sr^{-1} MeV^{-1}.
Successfully completed 200 consecutive shots, proving the approach's robustness.

Conclusions:

The novel scheme effectively meets stringent gas target density requirements for laser-driven proton acceleration.
The demonstrated robustness and efficiency pave the way for multipetawatt laser systems and advanced applications.