Beam profiles of proton and carbon ions in the relativistic transparency regime

D. Jung*, B. J. Albright, L. Yin, D. C. Gautier, R. Shah, S. Palaniyappan, S. Letzring, B. Dromey, H-C Wu, T. Shimada, R. P. Johnson, M. Roth, J. C. Fernandez, D. Habs, B. M. Hegelich

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


Ion acceleration from relativistic laser solid interactions has been of particular interest over the last decade. While beam profiles have been studied for target normal sheath acceleration (TNSA), such profiles have yet to be described for other mechanisms. Here, experimental data is presented, investigating ion beam profiles from acceleration governed by relativistic transparent laser plasma interaction. The beam shape of carbon C6+ ions and protons has been measured simultaneously with a wide angle spectrometer. It was found that ion beams deviate from the typical Gaussian-like shape found with TNSA and that the profile is governed by electron dynamics in the volumetric laser-plasma interaction with a relativistically transparent plasma; due to the ponderomotive force electrons are depleted from the center of the laser axis and form lobes affecting the ion beam structure. The results are in good agreement with high resolution three-dimensional-VPIC simulations and can be used as a new tool to experimentally distinguish between different acceleration mechanisms.

Original languageEnglish
Article number123035
Number of pages13
JournalNew Journal of Physics
Publication statusPublished - 23 Dec 2013




Dive into the research topics of 'Beam profiles of proton and carbon ions in the relativistic transparency regime'. Together they form a unique fingerprint.

Cite this