Measurement and Analysis of Near-Classical Thermal Transport in One-Micron Laser-Irradiated Spherical Plasmas

Hauer, A.; Mead, W. C.; Willi, O.; Kilkenny, J. D.; Bradley, D. K.; Tabatabaei, Salomeh; Hooker, C. J.

doi:10.1103/physrevlett.53.2563

Cited by 31 publications

(8 citation statements)

References 17 publications

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“…Since no measurements were made of the steepness of the front as in ref. 21 and no substrates other than glass were used, one cann'ot rule out the possibility that the two series of ex~eriments could have shown the same behavior. The latest Ltherford results confirm the presence of a steep temperature profile in contrast to the LLE observation.…”

Section: Experiments In Thermal Transportmentioning

confidence: 99%

Thermal electron transport in direct-drive laser fusion

Delettrez¹

1986

Can. J. Phys.

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The experimental and theoretical aspects of electron thermal transport in direct-drive laser fusion are reviewed. The FokkerPlanck equation and the flux-limited diffusion model, which is widely used in laser-fusion simulation codes, are described. After a discussion on the limitation of planar-target transport experiments, results of spherical experiments are surveyed. Solutions of the Fokker-Planck equations for cathode problems and for cases with stationary and moving ion density profiles are presented. Limitations of the flux-limited diffusion model are discussed in light of the Fokker-Planck results. Comparisons between experimental and theoretical results lead to the conclusion that the modeling of electron thermal transport in uniform spherical geometry does not require the existence of magnetic fields or anomalous plasma effects.On revoit les aspects thkoriques et expkrimentaux du transport Clectronique de chaleur dans la fusion laser directe. On dkcrit I'kquation Fokker-Planck et le modtle de diffusion limitke par le flux qui est frkquemment utilisk dans les codes de simulation de fusion laser. Aprts une discussion sur la limitation des expkriences de transport avec cibles planes, on examine les rksultats dlex@riences sphkriques. Des solutions des Cquations Fokker-Planck pour des probltmes de cathodes, ainsi que pour des cas avec des profils de densitk ionique stationnaires ou en mouvement, sont prksentts. Les comparaisons entre les rksultats expkrimentaux et thkoriques mknent B la conclusion que la modClisation du transfert tlectronique de chaleur ne requiert pas I'existence de champs magnktiques ou d'effets de plasma anormaux.[Traduit par la revue]Can. J. Phys. 64,932 (1986)

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Section: Experiments In Thermal Transportmentioning

confidence: 99%

Thermal electron transport in direct-drive laser fusion

Delettrez¹

1986

Can. J. Phys.

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“…3~. Anomalous limits to electron heat transport Although recognized at the outset as an ad hoc brutal corrector (36) in hydrodynamics codes, the so-called heat-flux limit factor for heat transport by electrons has been the subject of much work, both experimental (37) and theoretical (38). As the trend continues to short wavelengths and larger gradients, heat transport seems to be getting more normal, in that the experiments seem to require a less severe ad hoc limit to the heat flux.…”

Section: Underdense Plasma Instabilitiesmentioning

confidence: 99%

Plasma effects in laser fusion: past and future

Johnston¹

1986

Can. J. Phys.

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Plasma effects in laser fusion are given a quick overview (past and present) and major trends are indicated. No prior familiarity with laser fusion or with plasma physics is assumed.On prockde B une revue rapidede la situation passke et prksente concernant les effets de plasma en fusion laser, et on indique les tendances principales qui se dessinent. L'exposC ne prCsuppose pas que la fusion laser ou la physique des plasmas soient dCjB des sujets familiers.[Traduit par la revue]Can.

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“…For instance in an early work to study the transport of energy in the overcritical plasma region [16] solid targets were uniformly illuminated at irradiances of 10 14 to 10 15 W/cm 2 and K-shell radiation was observed from vanadium coated with various layers of plastic. In a more recent experiment on the same topic, Schurtz et al [17] have used emission from vanadium and titanium layers buried inside a target.…”

Section: Introductionmentioning

confidence: 99%

Vanadium fine-structure K-shell electron impact ionization cross sections for fast-electron diagnostic in laser–solid experiments

Palmeri

Quinet

Batani

2015

Atomic Data and Nuclear Data Tables

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a b s t r a c tThe K-shell electron impact ionization (EII) cross section, along with the K-shell fluorescence yield, is one of the key atomic parameters for fast-electron diagnostic in laser-solid experiments through the K-shell emission cross section. In addition, in a campaign dedicated to the modeling of the K lines of astrophysical interest (Palmeri et al. (2012)), the K-shell fluorescence yields for the K-vacancy fine-structure atomic levels of all the vanadium isonuclear ions have been calculated.In this study, the K-shell EII cross sections connecting the ground and the metastable levels of the parent vanadium ions to the daughter ions K-vacancy levels considered in Palmeri et al. (2012) have been determined. The relativistic distorted-wave (DW) approximation implemented in the FAC atomic code has been used for the incident electron kinetic energies up to 20 times the K-shell threshold energies. Moreover, the resulting DW cross sections have been extrapolated at higher energies using the asymptotic behavior of the modified relativistic binary encounter Bethe model (MRBEB) of Guerra et al. (2012) with the density-effect correction proposed by Davies et al. (2013).

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Measurement and Analysis of Near-Classical Thermal Transport in One-Micron Laser-Irradiated Spherical Plasmas

Cited by 31 publications

References 17 publications

Thermal electron transport in direct-drive laser fusion

Thermal electron transport in direct-drive laser fusion

Plasma effects in laser fusion: past and future

Vanadium fine-structure K-shell electron impact ionization cross sections for fast-electron diagnostic in laser–solid experiments

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