Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime

Dover, N. P. and Palmer, C. A. J. and Streeter, M. J. V. and Ahmed, H. and Albertazzi, B. and Borghesi, M. and Carroll, D. C. and Fuchs, J. and Heathcote, R. and Hilz, P. and Kakolee, K. F. and Kar, S. and Kodama, R. and Kon, A. and MacLellan, D. A. and McKenna, P. and Nagel, S. R. and Neely, D. and Notley, M. M. and Nakatsutsumi, M. and Prasad, R. and Scott, G. and Tampo, M. and Zepf, M. and Schreiber, J. and Najmudin, Z. (2016) Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime. New Journal of Physics, 18. ISSN 1367-2630

Full text not available from this repository.

Abstract

Spectrally-peaked proton beams of high charge (E-p approximate to 8 MeV, Delta E approximate to 4 MeV, N approximate to 50 nC) have been observed from the interaction of an intense laser (> 10(19) W cm(-2)) with ultrathin CH foils, as measured by spectrally-resolved full beam profiles. These beams are reproducibly generated for foil thicknesses 5-100 nm, and exhibit narrowing divergence with decreasing target thickness down to approximate to 8 degrees for 5 nm. Simulations demonstrate that the narrow energy spread feature is a result of buffered acceleration of protons. The radiation pressure at the front of the target results in asymmetric sheath fields which permeate throughout the target, causing preferential forward acceleration. Due to their higher charge-to-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.

Item Type: Journal Article
Journal or Publication Title: New Journal of Physics
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 88516
Deposited By: ep_importer_pure
Deposited On: 01 Nov 2017 10:10
Refereed?: Yes
Published?: Published
Last Modified: 15 Oct 2019 04:25
URI: https://eprints.lancs.ac.uk/id/eprint/88516

Actions (login required)

View Item View Item