Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

Paul McKenna; David Carroll; Mireille Coury; A.P.L. Robinson; Xiaohui Yuan; Ceri Mae Brenner; Matthias Burza; Ross Gray; Mark Quinn; David Neely; Olivier Tresca; Kate Lancaster; YT Li; XX Lin; CG Wahlstrom

doi:10.1063/1.3685615

Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

Paul McKenna, David Carroll, Mireille Coury, A.P.L. Robinson, Xiaohui Yuan, Ceri Mae Brenner, Matthias Burza, Ross Gray, Mark Quinn, David Neely, Olivier Tresca, Kate Lancaster, YT Li, XX Lin, CG Wahlstrom

Research output: Contribution to journal › Letter › peer-review

17 Citations (Scopus)

Abstract

The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2 x 10(18) - 6 x 10(20) W/cm(2), by (1) variation of the laser energy for a fixed irradiated spot size, and (2) by variation of the spot size for a fixed energy. At a given laser pulse intensity, the maximum proton energy is higher under defocus illumination compared to tight focus and the results are explained in terms of geometrical changes to the hot electron injection

Original language	English
Article number	074105
Journal	Applied Physics Letters
Volume	100
Issue number	7
DOIs	https://doi.org/10.1063/1.3685615
Publication status	Published - 13 Feb 2012

Keywords

electron injection
proton acceleration
lasers
laser irradiation

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10.1063/1.3685615

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McKenna, P., Carroll, D., Coury, M., Robinson, A. P. L., Yuan, X., Brenner, C. M., Burza, M., Gray, R., Quinn, M., Neely, D., Tresca, O., Lancaster, K., Li, YT., Lin, XX., & Wahlstrom, CG. (2012). Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets. Applied Physics Letters, 100(7), Article 074105. https://doi.org/10.1063/1.3685615

@article{fae43de1643c4f678fdc79d81c35cd15,

title = "Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets",

abstract = "The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2 x 10(18) - 6 x 10(20) W/cm(2), by (1) variation of the laser energy for a fixed irradiated spot size, and (2) by variation of the spot size for a fixed energy. At a given laser pulse intensity, the maximum proton energy is higher under defocus illumination compared to tight focus and the results are explained in terms of geometrical changes to the hot electron injection",

keywords = "electron injection , proton acceleration , lasers, laser irradiation",

author = "Paul McKenna and David Carroll and Mireille Coury and A.P.L. Robinson and Xiaohui Yuan and Brenner, {Ceri Mae} and Matthias Burza and Ross Gray and Mark Quinn and David Neely and Olivier Tresca and Kate Lancaster and YT Li and XX Lin and CG Wahlstrom",

year = "2012",

month = feb,

day = "13",

doi = "10.1063/1.3685615",

language = "English",

volume = "100",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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McKenna, P, Carroll, D, Coury, M, Robinson, APL, Yuan, X, Brenner, CM, Burza, M, Gray, R, Quinn, M, Neely, D, Tresca, O, Lancaster, K, Li, YT, Lin, XX & Wahlstrom, CG 2012, 'Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets', Applied Physics Letters, vol. 100, no. 7, 074105. https://doi.org/10.1063/1.3685615

TY - JOUR

T1 - Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

AU - McKenna, Paul

AU - Carroll, David

AU - Coury, Mireille

AU - Robinson, A.P.L.

AU - Yuan, Xiaohui

AU - Brenner, Ceri Mae

AU - Burza, Matthias

AU - Gray, Ross

AU - Quinn, Mark

AU - Neely, David

AU - Tresca, Olivier

AU - Lancaster, Kate

AU - Li, YT

AU - Lin, XX

AU - Wahlstrom, CG

PY - 2012/2/13

Y1 - 2012/2/13

N2 - The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2 x 10(18) - 6 x 10(20) W/cm(2), by (1) variation of the laser energy for a fixed irradiated spot size, and (2) by variation of the spot size for a fixed energy. At a given laser pulse intensity, the maximum proton energy is higher under defocus illumination compared to tight focus and the results are explained in terms of geometrical changes to the hot electron injection

AB - The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2 x 10(18) - 6 x 10(20) W/cm(2), by (1) variation of the laser energy for a fixed irradiated spot size, and (2) by variation of the spot size for a fixed energy. At a given laser pulse intensity, the maximum proton energy is higher under defocus illumination compared to tight focus and the results are explained in terms of geometrical changes to the hot electron injection

KW - electron injection

KW - proton acceleration

KW - lasers

KW - laser irradiation

UR - http://www.scopus.com/inward/record.url?scp=84863181609&partnerID=8YFLogxK

U2 - 10.1063/1.3685615

DO - 10.1063/1.3685615

M3 - Letter

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 7

M1 - 074105

ER -

Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

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Keywords

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Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets

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Keywords

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