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Updated: Mar 30, 2026

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Active Plasma Lensing for Relativistic Laser-Plasma-Accelerated Electron Beams
J van Tilborg1, S Steinke1, C G R Geddes1
1Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.
Abstract:
Compact, tunable, radially symmetric focusing of electrons is critical to laser-plasma accelerator (LPA) applications. Experiments are presented demonstrating the use of a discharge-capillary active plasma lens to focus 100-MeV-level LPA beams. The lens can provide tunable field gradients in excess of 3000 T/m, enabling cm-scale focal lengths for GeV-level beam energies and allowing LPA-based electron beams and light sources to maintain their compact footprint. For a range of lens strengths, excellent agreement with simulation was obtained.
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