High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction

U. Zastrau; A. Sengebusch; P. Audebert; E. Brambrink; R. R. Fäustlin; T. Kämpfer; E. Kroupp; R. Loetzsch; Y. Maron; H. Reinholz; G. Röpke; E. Stambulchik; I. Uschmann; E. Förster

doi:10.1016/j.hedp.2011.01.003

High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction

U. Zastrau
, A. Sengebusch
, P. Audebert
, E. Brambrink
, R. R. Fäustlin
, T. Kämpfer
, E. Kroupp
, R. Loetzsch
, Y. Maron
, H. Reinholz
, G. Röpke
, E. Stambulchik
, I. Uschmann
, E. Förster

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

Abstract

We studied temperature and Kα yield radial profiles of thin titanium foils as a result of femtosecond high-power laser pulse irradiation at several 10¹⁹ W/cm² by high-resolution x-ray spectroscopy. Laser-accelerated electrons heat the cold solid to bulk temperatures of up to ∼50 eV. The plasma strongly affects the shape of the emitted Kα doublet, which is surveyed by x-ray spectroscopy with both high spectral (E/ΔE ≥ 15,000) and 1D spatial (Δx ≤ 13.5 μm) resolutions. Temperature-dependent spectra modeled by line-shape calculations are compared with Abel-inverted experimental spectra and provide a radial temperature distribution. The radially resolved Kα yield shows a depletion of the Kα₁-line at the position of the laser focus. The density gradients induced by prepulses are modeled by hydrodynamic simulations, and density-dependent line-shape models are applied. The x-ray yield as function of foil thickness is explained by partial refluxing of a multi-keV electron distribution inside the foil, supported by Monte-Carlo simulations. Finally, we derive parameters to optimize the peak brilliance of such a laser-driven thin foil x-ray source.

Original language	English
Pages (from-to)	47-53
Number of pages	7
Journal	High Energy Density Physics
Volume	7
Issue number	2
DOIs	https://doi.org/10.1016/j.hedp.2011.01.003
Publication status	Published - 1 Jun 2011

Keywords

Backlighter
Dense plasmas
Hydrodynamics
Laser-matter-interaction
Line-shape modeling
Spectroscopy
Warm dense matter
X-ray

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10.1016/j.hedp.2011.01.003

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Zastrau, U., Sengebusch, A., Audebert, P., Brambrink, E., Fäustlin, R. R., Kämpfer, T., Kroupp, E., Loetzsch, R., Maron, Y., Reinholz, H., Röpke, G., Stambulchik, E., Uschmann, I., & Förster, E. (2011). High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction. High Energy Density Physics, 7(2), 47-53. https://doi.org/10.1016/j.hedp.2011.01.003

@article{9e018b949ccd41d38c05233cde3b975b,

title = "High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction",

abstract = "We studied temperature and Kα yield radial profiles of thin titanium foils as a result of femtosecond high-power laser pulse irradiation at several 1019 W/cm2 by high-resolution x-ray spectroscopy. Laser-accelerated electrons heat the cold solid to bulk temperatures of up to ∼50 eV. The plasma strongly affects the shape of the emitted Kα doublet, which is surveyed by x-ray spectroscopy with both high spectral (E/ΔE ≥ 15,000) and 1D spatial (Δx ≤ 13.5 μm) resolutions. Temperature-dependent spectra modeled by line-shape calculations are compared with Abel-inverted experimental spectra and provide a radial temperature distribution. The radially resolved Kα yield shows a depletion of the Kα1-line at the position of the laser focus. The density gradients induced by prepulses are modeled by hydrodynamic simulations, and density-dependent line-shape models are applied. The x-ray yield as function of foil thickness is explained by partial refluxing of a multi-keV electron distribution inside the foil, supported by Monte-Carlo simulations. Finally, we derive parameters to optimize the peak brilliance of such a laser-driven thin foil x-ray source.",

keywords = "Backlighter, Dense plasmas, Hydrodynamics, Laser-matter-interaction, Line-shape modeling, Spectroscopy, Warm dense matter, X-ray",

author = "U. Zastrau and A. Sengebusch and P. Audebert and E. Brambrink and F{\"a}ustlin, \{R. R.\} and T. K{\"a}mpfer and E. Kroupp and R. Loetzsch and Y. Maron and H. Reinholz and G. R{\"o}pke and E. Stambulchik and I. Uschmann and E. F{\"o}rster",

year = "2011",

month = jun,

day = "1",

doi = "10.1016/j.hedp.2011.01.003",

language = "English",

volume = "7",

pages = "47--53",

journal = "High Energy Density Physics",

issn = "1574-1818",

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Zastrau, U, Sengebusch, A, Audebert, P, Brambrink, E, Fäustlin, RR, Kämpfer, T, Kroupp, E, Loetzsch, R, Maron, Y, Reinholz, H, Röpke, G, Stambulchik, E, Uschmann, I & Förster, E 2011, 'High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction', High Energy Density Physics, vol. 7, no. 2, pp. 47-53. https://doi.org/10.1016/j.hedp.2011.01.003

TY - JOUR

T1 - High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction

AU - Zastrau, U.

AU - Sengebusch, A.

AU - Audebert, P.

AU - Brambrink, E.

AU - Fäustlin, R. R.

AU - Kämpfer, T.

AU - Kroupp, E.

AU - Loetzsch, R.

AU - Maron, Y.

AU - Reinholz, H.

AU - Röpke, G.

AU - Stambulchik, E.

AU - Uschmann, I.

AU - Förster, E.

PY - 2011/6/1

Y1 - 2011/6/1

N2 - We studied temperature and Kα yield radial profiles of thin titanium foils as a result of femtosecond high-power laser pulse irradiation at several 1019 W/cm2 by high-resolution x-ray spectroscopy. Laser-accelerated electrons heat the cold solid to bulk temperatures of up to ∼50 eV. The plasma strongly affects the shape of the emitted Kα doublet, which is surveyed by x-ray spectroscopy with both high spectral (E/ΔE ≥ 15,000) and 1D spatial (Δx ≤ 13.5 μm) resolutions. Temperature-dependent spectra modeled by line-shape calculations are compared with Abel-inverted experimental spectra and provide a radial temperature distribution. The radially resolved Kα yield shows a depletion of the Kα1-line at the position of the laser focus. The density gradients induced by prepulses are modeled by hydrodynamic simulations, and density-dependent line-shape models are applied. The x-ray yield as function of foil thickness is explained by partial refluxing of a multi-keV electron distribution inside the foil, supported by Monte-Carlo simulations. Finally, we derive parameters to optimize the peak brilliance of such a laser-driven thin foil x-ray source.

AB - We studied temperature and Kα yield radial profiles of thin titanium foils as a result of femtosecond high-power laser pulse irradiation at several 1019 W/cm2 by high-resolution x-ray spectroscopy. Laser-accelerated electrons heat the cold solid to bulk temperatures of up to ∼50 eV. The plasma strongly affects the shape of the emitted Kα doublet, which is surveyed by x-ray spectroscopy with both high spectral (E/ΔE ≥ 15,000) and 1D spatial (Δx ≤ 13.5 μm) resolutions. Temperature-dependent spectra modeled by line-shape calculations are compared with Abel-inverted experimental spectra and provide a radial temperature distribution. The radially resolved Kα yield shows a depletion of the Kα1-line at the position of the laser focus. The density gradients induced by prepulses are modeled by hydrodynamic simulations, and density-dependent line-shape models are applied. The x-ray yield as function of foil thickness is explained by partial refluxing of a multi-keV electron distribution inside the foil, supported by Monte-Carlo simulations. Finally, we derive parameters to optimize the peak brilliance of such a laser-driven thin foil x-ray source.

KW - Backlighter

KW - Dense plasmas

KW - Hydrodynamics

KW - Laser-matter-interaction

KW - Line-shape modeling

KW - Spectroscopy

KW - Warm dense matter

KW - X-ray

U2 - 10.1016/j.hedp.2011.01.003

DO - 10.1016/j.hedp.2011.01.003

M3 - Article

AN - SCOPUS:79951697120

SN - 1574-1818

VL - 7

SP - 47

EP - 53

JO - High Energy Density Physics

JF - High Energy Density Physics

IS - 2

ER -

High-resolution radial Kα spectra obtained from a multi-keV electron distribution in solid-density titanium foils generated by relativistic laser-matter interaction

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Keywords

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