Projects per year
The measured spatial-intensity distribution of the beam of protons accelerated from the rear side of a solid target irradiated by an intense (>10 Wcm) laser pulse provides a diagnostic of the two-dimensional fast electron density profile at the target rear surface and thus the fast electron beam transport pattern within the target. An analytical model is developed, accounting for rear-surface fast electron sheath dynamics, ionization and projection of the resulting beam of protons. The sensitivity of the spatial-intensity distribution of the proton beam to the fast electron density distribution is investigated. An annular fast electron beam transport pattern with filamentary structure is inferred for the case of a thick diamond target irradiated at a peak laser intensity of 6 × 10 Wcm.
- laser-driven ion acceleration
- fast-electron beams
- fast-electron transport in solids
Maclellan, D. A., Carroll, D. C., Gray, R. J., Booth, N., Izquierdo, B., Powell, H. W., Scott, G. G., Neely, D., & McKenna, P. (2013). Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams. Laser and Particle Beams, 31(3), 475-480. https://doi.org/10.1017/S0263034613000529