A method for calculating the effective charge of ions decelerated in a hot dense plasma

Gus’kov, S. Yu.; Змитренко, Н. В.; Il’in, D. V.; Levkovskii, A. A.; Розанов, В. Б.; Sherman, V. E.

doi:10.1134/s1063780x09090013

Cited by 20 publications

(15 citation statements)

References 10 publications

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“…The effective beam charge state in the plasma, that is a crucial parameter for the stopping power, was calculated using a Monte-Carlo code based on projectile electron loss and capture rates1119 as well as the models by Gus'kov et al 26. and Kreussler et al 27…”

Section: Resultsmentioning

confidence: 99%

“…For the calculation of the projectile charge state, in addition to the previously used Monte-Carlo code to predict the mean beam charge1119, we use two alternative descriptions that appear to be more accurate for low projectile velocities. The model by Gus'kov et al 26. calculates the effective beam charge state in plasma employing a formalism similar to the semi-empirical formula by Ziegler et al 28.…”

Section: Methodsmentioning

confidence: 99%

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Experimental discrimination of ion stopping models near the Bragg peak in highly ionized matter

et al. 2017

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The energy deposition of ions in dense plasmas is a key process in inertial confinement fusion that determines the α-particle heating expected to trigger a burn wave in the hydrogen pellet and resulting in high thermonuclear gain. However, measurements of ion stopping in plasmas are scarce and mostly restricted to high ion velocities where theory agrees with the data. Here, we report experimental data at low projectile velocities near the Bragg peak, where the stopping force reaches its maximum. This parameter range features the largest theoretical uncertainties and conclusive data are missing until today. The precision of our measurements, combined with a reliable knowledge of the plasma parameters, allows to disprove several standard models for the stopping power for beam velocities typically encountered in inertial fusion. On the other hand, our data support theories that include a detailed treatment of strong ion-electron collisions.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Experimental discrimination of ion stopping models near the Bragg peak in highly ionized matter

et al. 2017

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“…The FCDF model has not been extended in the above sense yet and one can observe, using the prolongations (38) and (39), that the asymptotic expansion of FC (k,w) coincides with that of the RPA DF (48). We point out that the OCP stopping power computed in [27(d)] in the FCDF approximation is practically indistinguishable from that calculated in the RPA.…”

Section: E the Fcdf Modelmentioning

confidence: 85%

“…It should be noted that 053102-4 the generalization of [29] to partially ionized plasmas or plasmas with complex ions and a larger number of species is rather straightforward (see, e.g., [28,47,48]). At present, this electron-ion correlation correction to the electron fluid stopping power might not be observable due to a relatively low accuracy of the experimental techniques available, but for dicluster heavy-ion projectiles [49] that correlation correction could become more pronounced.…”

Section: Polarization Stopping Powermentioning

confidence: 99%

Dielectric function of dense plasmas, their stopping power, and sum rules

et al. 2014

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Mathematical, particularly, asymptotic properties of the random-phase approximation, Mermin approximation, and extended Mermin-type approximation of the coupled plasma dielectric function are analyzed within the method of moments. These models are generalized for two-component plasmas. Some drawbacks and advantages of the above models are pointed out. The two-component plasma stopping power is shown to be enhanced with respect to that of the electron fluid.

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“…Highly charged plasmas at high temperature modify the plasma screening properties and thereby impact ionization, electron capture and recombination rates, and cross-sections; moreover the velocity dependence of those atomic collision processes in strongly ionized matter are not well understood. Hence, the explicit calculation of the mean charge state [11] from first principles is very difficult in dense matter and only quasiempirical models [12,13] are currently being used to predict Z mean for light ions passing through WDM.…”

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confidence: 99%

Charge Equilibrium of a Laser-Generated Carbon-Ion Beam in Warm Dense Matter

et al. 2013

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Using ion carbon beams generated by high intensity short pulse lasers we perform measurements of single shot mean charge equilibration in cold or isochorically heated solid density aluminum matter. We demonstrate that plasma effects in such matter heated up to 1 eV do not significantly impact the equilibration of carbon ions with energies 0.045-0.5 MeV/nucleon. Furthermore, these measurements allow for a first evaluation of semiempirical formulas or ab initio models that are being used to predict the mean of the equilibrium charge state distribution for light ions passing through warm dense matter.

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A method for calculating the effective charge of ions decelerated in a hot dense plasma

Cited by 20 publications

References 10 publications

Experimental discrimination of ion stopping models near the Bragg peak in highly ionized matter

Experimental discrimination of ion stopping models near the Bragg peak in highly ionized matter

Dielectric function of dense plasmas, their stopping power, and sum rules

Charge Equilibrium of a Laser-Generated Carbon-Ion Beam in Warm Dense Matter

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