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초강력 레이저 과학 연구단
초강력 레이저과학 연구단
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Transition of proton energy scaling using an ultrathin target irradiated by linearly polarized femtosecond laser pulses

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Title
Transition of proton energy scaling using an ultrathin target irradiated by linearly polarized femtosecond laser pulses
Author(s)
I Jong Kim; Pae K.H.; Chul Min Kim; Hyung Taek Kim; Jae Hee Sung; Seong Ku Lee; Tae Jun Yu; Il Woo Choi; Lee C.L.; Nam K.H.; Nickles P.V.; Tae Moon Jeong; Lee J.M.
Publication Date
2013-10
Journal
PHYSICAL REVIEW LETTERS, v.111, no.16, pp.165003-1 - 165003-5
Publisher
AMER PHYSICAL SOC
Abstract
Particle acceleration using ultraintense, ultrashort laser pulses is one of the most attractive topics in relativistic laser-plasma research. We report proton and/or ion acceleration in the intensity range of 5×1019 to 3.3×1020 W/cm2 by irradiating linearly polarized, 30-fs laser pulses on 10-to 100-nm-thick polymer targets. The proton energy scaling with respect to the intensity and target thickness is examined, and a maximum proton energy of 45 MeV is obtained when a 10-nm-thick target is irradiated by a laser intensity of 3.3×1020 W/cm2. The proton acceleration is explained by a hybrid acceleration mechanism including target normal sheath acceleration, radiation pressure acceleration, and Coulomb explosion assisted-free expansion. The transition of proton energy scaling from I1/2 to I is observed as a consequence of the hybrid acceleration mechanism. The experimental results are supported by two- and three-dimensional particle-in-cell simulations. © 2013 American Physical Society.
URI
http://pr.ibs.re.kr/handle/8788114/1243
DOI
10.1103/PhysRevLett.111.165003
ISSN
0031-9007
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
Files in This Item:
2013-10-18-Physical Review Letters-TransitionofProtonEnergyScalingUsinganUltrathin.pdfDownload

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