Angle-dependent modulated spectral peaks of proton beams generated in ultrashort intense laser-solid interactions

L. N. Su, Z. D. Hu, Y. Zheng, M. Liu, Y. T. Li, W. M. Wang, Z. M. Sheng, X. H. Yuan, M. H. Xu, Z. W. Shen, H. T. Fan, L. M. Chen, X. Lu, J. L. Ma, X. Wang, Z. H. Wang, Z. Y. Wei, J. Zhang

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Abstract

Proton acceleration from 4μm thick aluminum foils irradiated by 30-TW Ti:sapphire laser pulses is investigated using an angle-resolved proton energy spectrometer. We find that a modulated spectral peak at ∼0.82MeV is presented at 2.5° off the target normal direction. The divergence angle of the modulated zone is 3.8°. Two-dimensional particle-in-cell simulations reveal that self-generated toroidal magnetic field at the rear surface of the target foil is responsible for the modulated spectral feature. The field deflects the low energy protons, resulting in the modulated energy spectrum with certain peaks.

Original languageEnglish
Article number093111
Number of pages6
JournalPhysics of Plasmas
Volume21
Issue number9
DOIs
Publication statusPublished - 24 Sep 2014

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proton energy
proton beams
foils
lasers
divergence
sapphire
energy spectra
interactions
spectrometers
aluminum
protons
pulses
cells
magnetic fields
simulation

Keywords

  • spectral peak
  • intense laser
  • proton beams

Cite this

Su, L. N. ; Hu, Z. D. ; Zheng, Y. ; Liu, M. ; Li, Y. T. ; Wang, W. M. ; Sheng, Z. M. ; Yuan, X. H. ; Xu, M. H. ; Shen, Z. W. ; Fan, H. T. ; Chen, L. M. ; Lu, X. ; Ma, J. L. ; Wang, X. ; Wang, Z. H. ; Wei, Z. Y. ; Zhang, J. / Angle-dependent modulated spectral peaks of proton beams generated in ultrashort intense laser-solid interactions. In: Physics of Plasmas. 2014 ; Vol. 21, No. 9.
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title = "Angle-dependent modulated spectral peaks of proton beams generated in ultrashort intense laser-solid interactions",
abstract = "Proton acceleration from 4μm thick aluminum foils irradiated by 30-TW Ti:sapphire laser pulses is investigated using an angle-resolved proton energy spectrometer. We find that a modulated spectral peak at ∼0.82MeV is presented at 2.5° off the target normal direction. The divergence angle of the modulated zone is 3.8°. Two-dimensional particle-in-cell simulations reveal that self-generated toroidal magnetic field at the rear surface of the target foil is responsible for the modulated spectral feature. The field deflects the low energy protons, resulting in the modulated energy spectrum with certain peaks.",
keywords = "spectral peak, intense laser, proton beams",
author = "Su, {L. N.} and Hu, {Z. D.} and Y. Zheng and M. Liu and Li, {Y. T.} and Wang, {W. M.} and Sheng, {Z. M.} and Yuan, {X. H.} and Xu, {M. H.} and Shen, {Z. W.} and Fan, {H. T.} and Chen, {L. M.} and X. Lu and Ma, {J. L.} and X. Wang and Wang, {Z. H.} and Wei, {Z. Y.} and J. Zhang",
note = "Date of Acceptance: 09/09/2014",
year = "2014",
month = "9",
day = "24",
doi = "10.1063/1.4896338",
language = "English",
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Su, LN, Hu, ZD, Zheng, Y, Liu, M, Li, YT, Wang, WM, Sheng, ZM, Yuan, XH, Xu, MH, Shen, ZW, Fan, HT, Chen, LM, Lu, X, Ma, JL, Wang, X, Wang, ZH, Wei, ZY & Zhang, J 2014, 'Angle-dependent modulated spectral peaks of proton beams generated in ultrashort intense laser-solid interactions', Physics of Plasmas, vol. 21, no. 9, 093111. https://doi.org/10.1063/1.4896338

Angle-dependent modulated spectral peaks of proton beams generated in ultrashort intense laser-solid interactions. / Su, L. N.; Hu, Z. D.; Zheng, Y.; Liu, M.; Li, Y. T.; Wang, W. M.; Sheng, Z. M.; Yuan, X. H.; Xu, M. H.; Shen, Z. W.; Fan, H. T.; Chen, L. M.; Lu, X.; Ma, J. L.; Wang, X.; Wang, Z. H.; Wei, Z. Y.; Zhang, J.

In: Physics of Plasmas, Vol. 21, No. 9, 093111, 24.09.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Angle-dependent modulated spectral peaks of proton beams generated in ultrashort intense laser-solid interactions

AU - Su, L. N.

AU - Hu, Z. D.

AU - Zheng, Y.

AU - Liu, M.

AU - Li, Y. T.

AU - Wang, W. M.

AU - Sheng, Z. M.

AU - Yuan, X. H.

AU - Xu, M. H.

AU - Shen, Z. W.

AU - Fan, H. T.

AU - Chen, L. M.

AU - Lu, X.

AU - Ma, J. L.

AU - Wang, X.

AU - Wang, Z. H.

AU - Wei, Z. Y.

AU - Zhang, J.

N1 - Date of Acceptance: 09/09/2014

PY - 2014/9/24

Y1 - 2014/9/24

N2 - Proton acceleration from 4μm thick aluminum foils irradiated by 30-TW Ti:sapphire laser pulses is investigated using an angle-resolved proton energy spectrometer. We find that a modulated spectral peak at ∼0.82MeV is presented at 2.5° off the target normal direction. The divergence angle of the modulated zone is 3.8°. Two-dimensional particle-in-cell simulations reveal that self-generated toroidal magnetic field at the rear surface of the target foil is responsible for the modulated spectral feature. The field deflects the low energy protons, resulting in the modulated energy spectrum with certain peaks.

AB - Proton acceleration from 4μm thick aluminum foils irradiated by 30-TW Ti:sapphire laser pulses is investigated using an angle-resolved proton energy spectrometer. We find that a modulated spectral peak at ∼0.82MeV is presented at 2.5° off the target normal direction. The divergence angle of the modulated zone is 3.8°. Two-dimensional particle-in-cell simulations reveal that self-generated toroidal magnetic field at the rear surface of the target foil is responsible for the modulated spectral feature. The field deflects the low energy protons, resulting in the modulated energy spectrum with certain peaks.

KW - spectral peak

KW - intense laser

KW - proton beams

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U2 - 10.1063/1.4896338

DO - 10.1063/1.4896338

M3 - Article

VL - 21

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

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M1 - 093111

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