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초강력 레이저 과학 연구단
초강력 레이저과학 연구단
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Fast scaling of energetic protons generated in the interaction of linearly polarized femtosecond petawatt laser pulses with ultrathin targets

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Title
Fast scaling of energetic protons generated in the interaction of linearly polarized femtosecond petawatt laser pulses with ultrathin targets
Author(s)
I Jong Kim; Ki Hong Pae; Chul Min Kim; Hyung Taek Kim; Il Woo Choi; Chang-Lyoul Lee; Himanshu Singhal; Jae Hee Sung; Seong Ku Lee; Hwang Woon Lee; Peter V. Nickles; Tae Moon Jeong; Chang Hee Nam
Publication Date
2015-12
Journal
HIGH ENERGY DENSITY PHYSICS, v.17, no., pp.203 - 207
Publisher
ELSEVIER SCIENCE BV
Abstract
Laser-driven proton/ion acceleration is a rapidly developing research field attractive for both fundamental physics and applications such as hadron therapy, radiography, inertial confinement fusion, and nuclear/particle physics. Laser-driven proton/ion beams, compared to those obtained in conventional accelerators, have outstanding features such as low emittance, small source size, ultra-short duration and huge acceleration gradient of ~1 MeV mm1. We report proton acceleration from ultrathin polymer targets irradiated with linearly polarized, 30-fs, 1-PW Ti:sapphire laser pulses. A maximum proton energy of 45 MeV with a broad and modulated profile was obtained when a 10-nm-thick target was irradiated at a laser intensity of 3.3 1020 W/cm2. The transition from slow (I1/2) to fast scaling (I) of maximum proton energy with respect to laser intensity I was observed and explained by the hybrid acceleration mechanism including target normal sheath acceleration and radiation pressure acceleration in the acceleration stage and Coulomb-explosion-assisted free expansion in the post acceleration stage.
URI
https://pr.ibs.re.kr/handle/8788114/1826
ISSN
1574-1818
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
Files in This Item:
(High Energy34_HEDP_2015.pdfDownload

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