Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams

D.A. Maclellan, D.C. Carroll, R.J. Gray, N. Booth, Bruno Izquierdo, H.W. Powell, Graeme G. Scott, D. Neely, P. McKenna

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The measured spatial-intensity distribution of the beam of protons accelerated from the rear side of a solid target irradiated by an intense (>10 Wcm) laser pulse provides a diagnostic of the two-dimensional fast electron density profile at the target rear surface and thus the fast electron beam transport pattern within the target. An analytical model is developed, accounting for rear-surface fast electron sheath dynamics, ionization and projection of the resulting beam of protons. The sensitivity of the spatial-intensity distribution of the proton beam to the fast electron density distribution is investigated. An annular fast electron beam transport pattern with filamentary structure is inferred for the case of a thick diamond target irradiated at a peak laser intensity of 6 × 10 Wcm.
LanguageEnglish
Pages475-480
Number of pages6
JournalLaser and Particle Beams
Volume31
Issue number3
DOIs
Publication statusPublished - 1 Sep 2013

Fingerprint

Proton beams
Solid state lasers
proton beams
Electron beams
Protons
Electronic density of states
Ionization
lasers
Carrier concentration
Analytical models
Laser pulses
Diamonds
electrons
electron beams
protons
electron density profiles
Electrons
Lasers
sheaths
density distribution

Keywords

  • laser-driven ion acceleration
  • fast-electron beams
  • fast-electron transport in solids

Cite this

Maclellan, D.A. ; Carroll, D.C. ; Gray, R.J. ; Booth, N. ; Izquierdo, Bruno ; Powell, H.W. ; Scott, Graeme G. ; Neely, D. ; McKenna, P. / Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams. In: Laser and Particle Beams. 2013 ; Vol. 31, No. 3. pp. 475-480.
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Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams. / Maclellan, D.A.; Carroll, D.C.; Gray, R.J.; Booth, N.; Izquierdo, Bruno; Powell, H.W.; Scott, Graeme G.; Neely, D.; McKenna, P.

In: Laser and Particle Beams, Vol. 31, No. 3, 01.09.2013, p. 475-480.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fast electron transport patterns in intense laser-irradiated solids diagnosed by modeling measured multi-MeV proton beams

AU - Maclellan, D.A.

AU - Carroll, D.C.

AU - Gray, R.J.

AU - Booth, N.

AU - Izquierdo, Bruno

AU - Powell, H.W.

AU - Scott, Graeme G.

AU - Neely, D.

AU - McKenna, P.

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AB - The measured spatial-intensity distribution of the beam of protons accelerated from the rear side of a solid target irradiated by an intense (>10 Wcm) laser pulse provides a diagnostic of the two-dimensional fast electron density profile at the target rear surface and thus the fast electron beam transport pattern within the target. An analytical model is developed, accounting for rear-surface fast electron sheath dynamics, ionization and projection of the resulting beam of protons. The sensitivity of the spatial-intensity distribution of the proton beam to the fast electron density distribution is investigated. An annular fast electron beam transport pattern with filamentary structure is inferred for the case of a thick diamond target irradiated at a peak laser intensity of 6 × 10 Wcm.

KW - laser-driven ion acceleration

KW - fast-electron beams

KW - fast-electron transport in solids

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