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Description
Recent advances in laser-plasma accelerators (LPAs) have generated high-quality electron beams characterised by high peak currents and low emittance, making them suitable for powering compact, next-generation free electron lasers (FELs). However, variations in laser performance from shot to shot cause mismatches in position and angle at the injection point, complicating efficient beam transport and stable FEL operation. To preserve the electron bunch quality during beam propagation through a specialised, compact transport system, an active plasma lens (APL) can be used as part of the capture mechanism.
This report investigates how injection errors influence electron beam properties along the beamline and their subsequent effect on FEL radiation in the extreme-ultraviolet (EUV) range.
The results demonstrate an acceptable range of injection errors, including the mismatching effect, and emphasise the strengths and limitations of APLs as capture systems for optimal FEL performance. Various correction methods are analysed to minimise the impact of these injection errors.
This work emphasises the potential of APL technology to develop compact FELs and improve LPA beam applications. Such progress is vital for future FEL facilities at ELI ERIC in the Czech Republic and for the EuPRAXIA project.
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