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Title: Quasi-monoenergetic proton beam from a proton-layer embedded metal foil irradiated by an intense laser pulse

Abstract

A target structure, ion-layer embedded foil (ILEF) is proposed for producing a quasi-monoenergetic proton beam by utilizing a bulk electrostatic field, which is generated by irradiating the target with an ultra-intense laser pulse, inside the plasma. Compared with the case of a single metal foil in which the proton layer is initially present on the surface, in the ILEF target, the proton layer is initially located inside a metal foil. A two-dimensional particle-in-cell (PIC) simulation shows that the target generates a proton beam with a narrow energy spread. With a laser intensity of 2 × 10{sup 19 }W/cm{sup 2}, a 22-MeV proton beam with an energy spread of 8% at the full-width-half-maximum (FWHM) is obtained when the proton layer is located at 0.4 μm inside the rear surface of a 2.4 μm-thick copper foil. When the proton layer moves toward the front side, a proton beam with a flat-top energy distribution ranging from 15 MeV to 35 MeV is obtained. Further, with a higher laser intensity of 10{sup 21 }W/cm{sup 2}, a proton beam with the maximum energy of 345 MeV and FWHM energy spread of 7.2% is obtained. The analysis of the PIC simulation with an aid of a fluid analysis shows that the spectrum is affected bymore » the initial position of the proton layer, its initial spread during the formation of the sheath field, and the space charge effect.« less

Authors:
; ; ; ; ; ;  [1];  [2]
  1. Center for Quantum-Beam-based Radiation Research, Korea Atomic Energy Research Institute, Daejeon 34057 (Korea, Republic of)
  2. Department of Physics, Kongju National University, GongJu 32588 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22599073
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; COPPER; ENERGY SPECTRA; FOILS; IRRADIATION; LASERS; LAYERS; MEV RANGE; PLASMA; PROTON BEAMS; PROTONS; PULSES; SPACE CHARGE; SURFACES; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Kim, Kyung Nam, Lee, Kitae, Kumar, Manoj, Kim, Ha-Na, Park, Seong Hee, Jeong, Young Uk, Vinokurov, Nikolay, and Kim, Yong Gi. Quasi-monoenergetic proton beam from a proton-layer embedded metal foil irradiated by an intense laser pulse. United States: N. p., 2016. Web. doi:10.1063/1.4944929.
Kim, Kyung Nam, Lee, Kitae, Kumar, Manoj, Kim, Ha-Na, Park, Seong Hee, Jeong, Young Uk, Vinokurov, Nikolay, & Kim, Yong Gi. Quasi-monoenergetic proton beam from a proton-layer embedded metal foil irradiated by an intense laser pulse. United States. https://doi.org/10.1063/1.4944929
Kim, Kyung Nam, Lee, Kitae, Kumar, Manoj, Kim, Ha-Na, Park, Seong Hee, Jeong, Young Uk, Vinokurov, Nikolay, and Kim, Yong Gi. Tue . "Quasi-monoenergetic proton beam from a proton-layer embedded metal foil irradiated by an intense laser pulse". United States. https://doi.org/10.1063/1.4944929.
@article{osti_22599073,
title = {Quasi-monoenergetic proton beam from a proton-layer embedded metal foil irradiated by an intense laser pulse},
author = {Kim, Kyung Nam and Lee, Kitae and Kumar, Manoj and Kim, Ha-Na and Park, Seong Hee and Jeong, Young Uk and Vinokurov, Nikolay and Kim, Yong Gi},
abstractNote = {A target structure, ion-layer embedded foil (ILEF) is proposed for producing a quasi-monoenergetic proton beam by utilizing a bulk electrostatic field, which is generated by irradiating the target with an ultra-intense laser pulse, inside the plasma. Compared with the case of a single metal foil in which the proton layer is initially present on the surface, in the ILEF target, the proton layer is initially located inside a metal foil. A two-dimensional particle-in-cell (PIC) simulation shows that the target generates a proton beam with a narrow energy spread. With a laser intensity of 2 × 10{sup 19 }W/cm{sup 2}, a 22-MeV proton beam with an energy spread of 8% at the full-width-half-maximum (FWHM) is obtained when the proton layer is located at 0.4 μm inside the rear surface of a 2.4 μm-thick copper foil. When the proton layer moves toward the front side, a proton beam with a flat-top energy distribution ranging from 15 MeV to 35 MeV is obtained. Further, with a higher laser intensity of 10{sup 21 }W/cm{sup 2}, a proton beam with the maximum energy of 345 MeV and FWHM energy spread of 7.2% is obtained. The analysis of the PIC simulation with an aid of a fluid analysis shows that the spectrum is affected by the initial position of the proton layer, its initial spread during the formation of the sheath field, and the space charge effect.},
doi = {10.1063/1.4944929},
url = {https://www.osti.gov/biblio/22599073}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 3,
volume = 23,
place = {United States},
year = {2016},
month = {3}
}