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초강력 레이저 과학 연구단
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Laser-driven high-energy proton beam with homogeneous spatial profile from a nanosphere target

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Title
Laser-driven high-energy proton beam with homogeneous spatial profile from a nanosphere target
Author(s)
Margarone, D; I Jong Kim; Psikal, J; Kaufman, J; Mocek, T; Il Woo Choi; Stolcova, L; Proska, J; Choukourov, A; Melnichuk, I; Klimo, O; Limpouch, J; Jae Hee Sung; Seong Ku Lee; Korn, G; Tae Moon Jeong
Publication Date
2015-07
Journal
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, v.18, no.7, pp.071304 -
Publisher
AMER PHYSICAL SOC
Abstract
A high-energy, high-yield proton beam with a good homogeneous profile has been generated from a nanosphere target irradiated by a short (30-fs), intense (7 x 10(20) W/cm(2)) laser pulse. A maximum proton energy of 30 MeV has been observed with a high proton number of 7 x 10(10) in the energy range 5-30 MeV. A homogeneous spatial profile with a uniformity (standard deviation from an average value within 85% beam area) of 15% is observed with the nanosphere dielectric target. Particle-in-cell simulations show the enhancement of proton cutoff energy and proton number with the nanosphere target and reveal that the homogeneous beam profile is related with a broadened angular distribution of hot electrons, which is initiated by the nanosphere structure. The homogeneous spatial properties obtained with the nanosphere target will be advantageous in developing laser-driven proton sources for practical applications in which high-quality beams are required
URI
http://pr.ibs.re.kr/handle/8788114/1988
DOI
10.1103/PhysRevSTAB.18.071304
ISSN
1098-4402
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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