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Combined plasma lens and rephasing stage for a laser wakefield accelerator
Cornelia Gustafsson1, Erik Löfquist2, Kristoffer Svendsen2
1Department of Physics, Lund University, P.O. Box 118, Lund, 22100, Sweden. cornelia.gustafsson@fysik.lth.se.
Scientific Reports
|November 2, 2024
Summary
Adjusting plasma density profiles in laser wakefield accelerators improves electron energy gain and reduces divergence. This research demonstrates a novel method for enhancing electron beam quality for advanced applications.
Area of Science:
- Plasma Physics
- Accelerator Physics
- Laser-Plasma Interactions
Background:
- Laser wakefield accelerators (LWFA) produce high-energy electrons but face limitations.
- Dephasing and emittance growth lead to reduced energy gain and increased electron beam divergence.
- Optimizing electron beam quality is crucial for applications in various scientific fields.
Purpose of the Study:
- To experimentally investigate the impact of tailored plasma density profiles on electron beam properties in LWFA.
- To address dephasing and emittance growth limitations in electron acceleration.
- To enhance both the energy gain and reduce the divergence of electron bunches.
Main Methods:
- Utilized shock-assisted ionization injection for generating quasi-monoenergetic electron bunches (100 MeV).
- Implemented a second, independently tunable plasma density region downstream of the primary accelerator.
- Employed theoretical models to validate experimental observations.
Main Results:
- Achieved a 25% increase in electron bunch energy gain.
- Demonstrated a 40% reduction in electron beam divergence.
- Confirmed the effectiveness of the plasma density profile manipulation.
Conclusions:
- Tailoring plasma density profiles is an effective strategy to overcome key limitations in LWFA.
- The proposed method offers a dual benefit of energy boost and divergence reduction for electron beams.
- This technique holds promise for improving the performance of laser-driven electron accelerators.
