Abstract
Advanced targets based on thin films of graphene oxide covered by metallic layers have been irradiated at high laser intensity () with 40 fs laser pulses to investigate the forward ion acceleration in the target normal sheath acceleration regime. A time-of-flight technique was employed with silicon-carbide detectors and ion collectors as fast on-line plasma diagnostics. At the optimized conditions of the laser focus position with respect to the target surface was measured the maximum proton energy using Au metallic films. A maximum proton energy of 2.85 MeV was measured using the Au metallization of 200 nm. The presence of graphene oxide facilitates the electron crossing of the foil minimizing the electron scattering and increasing the electric field driving the ion acceleration. The effect of plasma electron density control using the graphene oxide is presented and discussed.
- Received 15 November 2018
DOI:https://doi.org/10.1103/PhysRevAccelBeams.22.021302
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Published by the American Physical Society
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Channeling 2018 Conference Edition
A collection of articles that expand upon original research presented at the 8th International Conference "Charged & Neutral Particles Channeling Phenomena - Channeling 2018" (23-28 September 2018, Ischia, Italy).