14 May 2015 Observation of monoenergetic protons from a near-critical gas target tailored by a hydrodynamic shock
Author Affiliations +
Abstract
We present our recent experimental results of monoenergetic protons accelerated from the interaction of an intense terawatt CO2 laser pulse with a near-critical hydrogen gas target, with its density profile tailored by a hydrodynamic shock. A 5-ns Nd:YAG laser pulse is focused onto a piece of stainless steel foil mounted at the front edge of the gas jet nozzle orifice. The ablation launches a spherical shock into the near-critical gas column, which creates a sharp density gradient at the front edge of the target, with ~ 6X local density enhancement up to several times of critical density within ~<100 microns. With such density profile, we have obtained monoenergetic proton beams with good shot-to-shot reproducibility and energies up to 1.2 MeV.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Y.-H. Chen, Y.-H. Chen, M. H. Helle, M. H. Helle, A. Ting, A. Ting, D. F. Gordon, D. F. Gordon, M. N. Polyanskiy, M. N. Polyanskiy, I. Pogorelsky, I. Pogorelsky, M. Babzien, M. Babzien, Z. Najmudin, Z. Najmudin, } "Observation of monoenergetic protons from a near-critical gas target tailored by a hydrodynamic shock", Proc. SPIE 9514, Laser Acceleration of Electrons, Protons, and Ions III; and Medical Applications of Laser-Generated Beams of Particles III, 95140C (14 May 2015); doi: 10.1117/12.2182094; https://doi.org/10.1117/12.2182094
PROCEEDINGS
6 PAGES


SHARE
Back to Top