Fast electron propagation in high-density plasmas created by 1D shock wave compression

experiments and simulations

J. J. Santos, D. Batani, P. McKenna, S. D. Baton, F. Dorchies, A. Dubrouil, C. Fourment, S. Hulin, E. D'Humières, H. Nicolaï, L. Gremillet, A. Debayle, J. J. Honrubia, P. Carpeggiani, M. Veltcheva, M. N. Quinn, E. Brambrink, V. Tikhonchuk

Research output: Contribution to journalArticle

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Abstract

We present results from an experimental characterization of fast electron transport in high density plasmas created by 1D shock wave compression. The Kα fluorescence from a Cu layer embedded in Al or CH foil targets is measured. We use long laser pulses (LP) with 180 J, 1.5 ns, 0.53μm to compress the foils by shock wave propagation to 2-3 times their solid density and heat them to ∼ 4eV (close to the Fermi temperature). A counter-propagating high-intensity short laser pulse (SP), with 40 J, 1 ps, 57×1019 Wcm-2, generates intense currents of fast electrons which propagate through the deep regions of the target just before shock breakthrough. The results are compared to the uncompressed, solid density case (without the LP beam). The complete set of measurements is compared to numerical results, including a 2D hydrodynamic description of the compression and pre-pulse effects, 2D PIC simulations of the SP beam interaction and both hybrid and PIC simulations of the electron transport in the target depth and sheaths. In the case of the non-compressed targets we need to take fast electron refluxing into account to reproduce the experimental results. By exploring the domain of warm temperatures, we identify a regime for the incident fast electron current density, 1010 < jh < 1012 Acm-2, for which the collective mechanisms of electron transport differs appreciably between solid density and compressed matter.

Original languageEnglish
Article number022060
Number of pages4
JournalJournal of Physics: Conference Series
Volume244
Issue numberPART 2
DOIs
Publication statusPublished - 1 Jan 2010

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plasma density
shock waves
propagation
pulses
electrons
simulation
lasers
foils
shock wave propagation
beam interactions
sheaths
counters
shock
hydrodynamics
methylidyne
current density
heat
fluorescence
temperature

Keywords

  • high density plasmas
  • 1D shock wave compression
  • inertial confinement fusion
  • fast electrons

Cite this

Santos, J. J. ; Batani, D. ; McKenna, P. ; Baton, S. D. ; Dorchies, F. ; Dubrouil, A. ; Fourment, C. ; Hulin, S. ; D'Humières, E. ; Nicolaï, H. ; Gremillet, L. ; Debayle, A. ; Honrubia, J. J. ; Carpeggiani, P. ; Veltcheva, M. ; Quinn, M. N. ; Brambrink, E. ; Tikhonchuk, V. / Fast electron propagation in high-density plasmas created by 1D shock wave compression : experiments and simulations. In: Journal of Physics: Conference Series. 2010 ; Vol. 244, No. PART 2.
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title = "Fast electron propagation in high-density plasmas created by 1D shock wave compression: experiments and simulations",
abstract = "We present results from an experimental characterization of fast electron transport in high density plasmas created by 1D shock wave compression. The Kα fluorescence from a Cu layer embedded in Al or CH foil targets is measured. We use long laser pulses (LP) with 180 J, 1.5 ns, 0.53μm to compress the foils by shock wave propagation to 2-3 times their solid density and heat them to ∼ 4eV (close to the Fermi temperature). A counter-propagating high-intensity short laser pulse (SP), with 40 J, 1 ps, 57×1019 Wcm-2, generates intense currents of fast electrons which propagate through the deep regions of the target just before shock breakthrough. The results are compared to the uncompressed, solid density case (without the LP beam). The complete set of measurements is compared to numerical results, including a 2D hydrodynamic description of the compression and pre-pulse effects, 2D PIC simulations of the SP beam interaction and both hybrid and PIC simulations of the electron transport in the target depth and sheaths. In the case of the non-compressed targets we need to take fast electron refluxing into account to reproduce the experimental results. By exploring the domain of warm temperatures, we identify a regime for the incident fast electron current density, 1010 < jh < 1012 Acm-2, for which the collective mechanisms of electron transport differs appreciably between solid density and compressed matter.",
keywords = "high density plasmas, 1D shock wave compression, inertial confinement fusion, fast electrons",
author = "Santos, {J. J.} and D. Batani and P. McKenna and Baton, {S. D.} and F. Dorchies and A. Dubrouil and C. Fourment and S. Hulin and E. D'Humi{\`e}res and H. Nicola{\"i} and L. Gremillet and A. Debayle and Honrubia, {J. J.} and P. Carpeggiani and M. Veltcheva and Quinn, {M. N.} and E. Brambrink and V. Tikhonchuk",
note = "Deposited under CC-BY 3.0 with permission of IOP Publishing Ltd.",
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Santos, JJ, Batani, D, McKenna, P, Baton, SD, Dorchies, F, Dubrouil, A, Fourment, C, Hulin, S, D'Humières, E, Nicolaï, H, Gremillet, L, Debayle, A, Honrubia, JJ, Carpeggiani, P, Veltcheva, M, Quinn, MN, Brambrink, E & Tikhonchuk, V 2010, 'Fast electron propagation in high-density plasmas created by 1D shock wave compression: experiments and simulations', Journal of Physics: Conference Series, vol. 244, no. PART 2, 022060. https://doi.org/10.1088/1742-6596/244/2/022060

Fast electron propagation in high-density plasmas created by 1D shock wave compression : experiments and simulations. / Santos, J. J.; Batani, D.; McKenna, P.; Baton, S. D.; Dorchies, F.; Dubrouil, A.; Fourment, C.; Hulin, S.; D'Humières, E.; Nicolaï, H.; Gremillet, L.; Debayle, A.; Honrubia, J. J.; Carpeggiani, P.; Veltcheva, M.; Quinn, M. N.; Brambrink, E.; Tikhonchuk, V.

In: Journal of Physics: Conference Series, Vol. 244, No. PART 2, 022060, 01.01.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fast electron propagation in high-density plasmas created by 1D shock wave compression

T2 - experiments and simulations

AU - Santos, J. J.

AU - Batani, D.

AU - McKenna, P.

AU - Baton, S. D.

AU - Dorchies, F.

AU - Dubrouil, A.

AU - Fourment, C.

AU - Hulin, S.

AU - D'Humières, E.

AU - Nicolaï, H.

AU - Gremillet, L.

AU - Debayle, A.

AU - Honrubia, J. J.

AU - Carpeggiani, P.

AU - Veltcheva, M.

AU - Quinn, M. N.

AU - Brambrink, E.

AU - Tikhonchuk, V.

N1 - Deposited under CC-BY 3.0 with permission of IOP Publishing Ltd.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - We present results from an experimental characterization of fast electron transport in high density plasmas created by 1D shock wave compression. The Kα fluorescence from a Cu layer embedded in Al or CH foil targets is measured. We use long laser pulses (LP) with 180 J, 1.5 ns, 0.53μm to compress the foils by shock wave propagation to 2-3 times their solid density and heat them to ∼ 4eV (close to the Fermi temperature). A counter-propagating high-intensity short laser pulse (SP), with 40 J, 1 ps, 57×1019 Wcm-2, generates intense currents of fast electrons which propagate through the deep regions of the target just before shock breakthrough. The results are compared to the uncompressed, solid density case (without the LP beam). The complete set of measurements is compared to numerical results, including a 2D hydrodynamic description of the compression and pre-pulse effects, 2D PIC simulations of the SP beam interaction and both hybrid and PIC simulations of the electron transport in the target depth and sheaths. In the case of the non-compressed targets we need to take fast electron refluxing into account to reproduce the experimental results. By exploring the domain of warm temperatures, we identify a regime for the incident fast electron current density, 1010 < jh < 1012 Acm-2, for which the collective mechanisms of electron transport differs appreciably between solid density and compressed matter.

AB - We present results from an experimental characterization of fast electron transport in high density plasmas created by 1D shock wave compression. The Kα fluorescence from a Cu layer embedded in Al or CH foil targets is measured. We use long laser pulses (LP) with 180 J, 1.5 ns, 0.53μm to compress the foils by shock wave propagation to 2-3 times their solid density and heat them to ∼ 4eV (close to the Fermi temperature). A counter-propagating high-intensity short laser pulse (SP), with 40 J, 1 ps, 57×1019 Wcm-2, generates intense currents of fast electrons which propagate through the deep regions of the target just before shock breakthrough. The results are compared to the uncompressed, solid density case (without the LP beam). The complete set of measurements is compared to numerical results, including a 2D hydrodynamic description of the compression and pre-pulse effects, 2D PIC simulations of the SP beam interaction and both hybrid and PIC simulations of the electron transport in the target depth and sheaths. In the case of the non-compressed targets we need to take fast electron refluxing into account to reproduce the experimental results. By exploring the domain of warm temperatures, we identify a regime for the incident fast electron current density, 1010 < jh < 1012 Acm-2, for which the collective mechanisms of electron transport differs appreciably between solid density and compressed matter.

KW - high density plasmas

KW - 1D shock wave compression

KW - inertial confinement fusion

KW - fast electrons

U2 - 10.1088/1742-6596/244/2/022060

DO - 10.1088/1742-6596/244/2/022060

M3 - Article

VL - 244

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - PART 2

M1 - 022060

ER -