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All optical dual stage laser wakefield acceleration driven by two-color laser pulses
Vishwa Bandhu Pathak1, Hyung Taek Kim2,3, J Vieira4
1Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.
Scientific Reports
|August 8, 2018
Summary
This study introduces a novel dual-stage laser wakefield acceleration (LWFA) technique using two-color laser pulses. This method significantly enhances electron bunch energy, achieving 3x higher gains than single-stage LWFA.
Area of Science:
- Plasma Physics
- Laser-driven Particle Acceleration
Background:
- Laser wakefield acceleration (LWFA) is a promising technique for generating high-energy electron bunches.
- Conventional LWFA often faces limitations in achievable electron bunch energy and acceleration distance.
Purpose of the Study:
- To propose and investigate an all-optical dual-stage LWFA scheme for enhanced electron bunch energy.
- To leverage co-propagating two-color laser pulses for improved particle acceleration.
Main Methods:
- Utilizing multi-dimensional particle-in-cell simulations.
- Implementing a dual-stage LWFA with a fundamental and a second-harmonic laser pulse in a plasma medium.
Main Results:
- The second-harmonic pulse effectively continues electron acceleration after the depletion of the fundamental pulse.
- Achieved a 3-fold increase in electron bunch energy compared to single-stage LWFA.
- Demonstrated the potential to obtain a 10-GeV electron bunch with 20-pC charge using 0.6 PW total laser power.
Conclusions:
- The proposed all-optical dual-stage LWFA offers a significant advancement in electron acceleration.
- This technique enables longer acceleration distances and higher electron energies, paving the way for more powerful compact accelerators.
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