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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/24856294
Record Status
Checked
Record Id
24856294
Title
Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime
Contributors
NP Dover
,
CAJ Palmer
,
MJV Streeter
,
H Ahmed
,
B Albertazzi
,
M Borghesi
,
DC Carroll (STFC Rutherford Appleton Lab., and Strathclyde Univ.)
,
J Fuchs
,
R Heathcote (STFC Rutherford Appleton Lab.)
,
P Hilz
,
KF Kakolee
,
S Kar
,
R Kodama
,
A Kon
,
DA MacLellan
,
P McKenna
,
SR Nagel
,
D Neely (STFC Rutherford Appleton Lab., and Strathclyde Univ.)
,
MM Notley (STFC Rutherford Appleton Lab.)
,
M Nakatsutsumi
,
R Prasad
,
G Scott (STFC Rutherford Appleton Lab., and Strathclyde Univ.)
,
M Tampo
,
M Zepf
,
J Schreiber
,
Z Najmudin
Abstract
Spectrally-peaked proton beams of high charge (Ep » 8 MeV, DE » 4 MeV, N » 50 nC ) have been observed from the interaction of an intense laser (>1019 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 »8 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.
Organisation
CLF
,
CI
,
STFC
Keywords
Funding Information
EPSRC
(EP/E035728/1);
EPSRC
(EP/K022415/1);
STFC
(ST/J002062/1)
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
New J Phys
18 (2016): 013038.
doi:10.1088/1367-2630/18/1/013038
2016
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