Longitudinal Ion Acceleration from High-Intensity Laser Interactions with Underdense Plasma - Physics > Plasma PhysicsReport as inadecuate




Longitudinal Ion Acceleration from High-Intensity Laser Interactions with Underdense Plasma - Physics > Plasma Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: Longitudinal ion acceleration from high-intensity I ~ 10^20 Wcm^-2 laserinteractions with helium gas jet targets n e ~ 0.04 n c have been observed.The ion beam has a maximum energy for He^2+ of approximately 40 MeV and wasdirectional along the laser propagation path, with the highest energy ionsbeing collimated to a cone of less than 10 degrees. 2D particle-in-cellsimulations have been used to investigate the acceleration mechanism. The timevarying magnetic field associated with the fast electron current provides acontribution to the accelerating electric field as well as providing acollimating field for the ions. A strong correlation between the plasma densityand the ion acceleration was found. A short plasma scale-length at the vacuuminterface was observed to be beneficial for the maximum ion energies, but thecollimation appears to be improved with longer scale-lengths due to enhancedmagnetic fields in the ramp acceleration region.



Author: L. Willingale, S. P. D. Mangles, P. M Nilson, R. J. Clarke, A. E. Dangor, M. C. Kaluza, S. Karsch, K. L. Lancaster, W. B. Mori, J

Source: https://arxiv.org/







Related documents