A corrected method for Coulomb scattering in arbitrarily weighted particle-in-cell plasma simulations

Higginson, D. P.; Holod, I.; Link, A.

doi:10.1016/j.jcp.2020.109450

Cited by 27 publications

(1 citation statement)

References 23 publications

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“…In addition, transport coefficients are required in the swarm procedure for determining the complete and consistent sets of cross-sections for collisions of charged particles with atoms and molecules of the background fluid [39][40][41][42]. These sets of cross-sections are employed as input data into the particle models of non-equilibrium plasma [43][44][45][46][47][48][49]. Due to the sensitivity of plasma models to transport coefficients and cross-section sets in the case of fluid and particle models, respectively, a great amount of attention has been dedicated to the calculation and measurement of transport coefficients of electrons and ions in numerous atomic and molecular gases.…”

Section: Introductionmentioning

confidence: 99%

Third-order transport coefficients for electrons in N₂ and CF₄: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

Simonovic¹,

Bošnjaković²,

Petrović³

et al. 2022

Plasma Sources Sci. Technol.

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Using a multi-term solution of the Boltzmann equation and Monte Carlo simulation technique we study behaviour of the third-order transport coefficients for electrons in model gases, including the ionisation model of Lucas and Saelee and modified Ness-Robson model of electron attachment, and in real gases, including N2 and CF4. We observe negative values in the E/n 0-profiles of the longitudinal and transverse third-order transport coefficients for electrons in CF4 (where E is the electric field and n 0 is the gas number density). While negative values of the longitudinal third-order transport coefficients are caused by the presence of rapidly increasing cross sections for vibrational excitations of CF4, the transverse third-order transport coefficient becomes negative over the E/n 0-values after the occurrence of negative differential conductivity. It is found that the accuracy of the two-term approximation for solving the Boltzmann equation is sufficient to investigate the behaviour of the third-order transport coefficients in N2, while for electrons in CF4 it produces large errors and is not even qualitatively correct . The influence of implicit and explicit effects of electron attachment and ionisation on the third-order transport tensor is investigated. In particular, we discuss the effects of attachment heating and attachment cooling on the third-order transport coefficients for electrons in the modified Ness-Robson model, while the effects of ionisation are studied for electrons in the ionisation model of Lucas and Saelee, N2 and CF4. The concurrence between the third-order transport coefficients and the components of the diffusion tensor, and the contribution of the longitudinal component of the third-order transport tensor to the spatial profile of the swarm are also investigated. For electrons in CF4 and CH4, we found that the contribution of the component of the third-order transport tensor to the spatial profile of the swarm between approximately 50 Td and 700 Td, is almost identical to the corresponding contribution for electrons in N2. This suggests that the recent measurements of third-order transport coefficients for electrons in N2 may be extended and generalized to other gases, such as CF4 and CH4.

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Section: Introductionmentioning

confidence: 99%

Third-order transport coefficients for electrons in N₂ and CF₄: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

Simonovic¹,

Bošnjaković²,

Petrović³

et al. 2022

Plasma Sources Sci. Technol.

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HB11—Understanding Hydrogen-Boron Fusion as a New Clean Energy Source

McKenzie

Batani

Mehlhorn³

et al. 2023

J Fusion Energ

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HB11 Energy’s mission is to realize large-scale electricity generation from the fusion of hydrogen with boron-11 (the HB11, or “proton-boron”, reaction) without the environmental problems normally associated with nuclear energy. A non-thermal approach is taken in the initiation of the reaction using high-peak-power lasers, which was the pursuit of HB11 Energy founder Prof. Heinrich Hora’s career as a theoretical physicist. In the 1980s, the invention of Chirped Pulse Amplification (CPA) of laser pulses by Donna Strickland and Gerard Mourou (Nobel Prize 2018) enabled the possibility of experimentally validating the earlier theoretical predictions. Several experimental demonstrations of the HB11 reaction using CPA lasers inspired the establishment of HB11 Energy and with it, the possibility of realizing an aneutronic nuclear energy source with easily accessible and safe fuel resources that could last thousands of years. Like all quests for fusion energy, there are significant scientific challenges remaining. HB11 Energy Holdings Pty Ltd, an Australian company, was established as the best vehicle to co-ordinate a global collaborative research effort to address these challenges and build capacity to host large-scale public private partnerships, such as those now recommended by the US National Academies of Science, Engineering and Medicine (NASEM) (US National Academies of Sciences, Engineering and Medicine in Bringing Fusion to the U.S. Grid,: National Academies Press, Washington, D.C, 2021). If net-energy-gain can be achieved through HB11 Energy’s concepts, there are many engineering benefits over traditional DT fusion that will see a dramatically simpler and safer reactor being produced. A technoeconomic assessment of such a reactor is also discussed which presents many engineering challenges that will need to be met before commercial HB11 fusion can be deployed on a large-scale.

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Algorithm for computing the electron-positron yield from the linear Breit-Wheeler process in high-intensity laser-plasma interactions

Arefiev

2023

Computer Physics Communications

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A corrected method for Coulomb scattering in arbitrarily weighted particle-in-cell plasma simulations

Cited by 27 publications

References 23 publications

Third-order transport coefficients for electrons in N₂ and CF₄: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

Third-order transport coefficients for electrons in N₂ and CF₄: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

HB11—Understanding Hydrogen-Boron Fusion as a New Clean Energy Source

Algorithm for computing the electron-positron yield from the linear Breit-Wheeler process in high-intensity laser-plasma interactions

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A corrected method for Coulomb scattering in arbitrarily weighted particle-in-cell plasma simulations

Cited by 27 publications

References 23 publications

Third-order transport coefficients for electrons in N2 and CF4: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

Third-order transport coefficients for electrons in N2 and CF4: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

HB11—Understanding Hydrogen-Boron Fusion as a New Clean Energy Source

Algorithm for computing the electron-positron yield from the linear Breit-Wheeler process in high-intensity laser-plasma interactions

Contact Info

Product

Resources

About

Third-order transport coefficients for electrons in N₂ and CF₄: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm

Third-order transport coefficients for electrons in N₂ and CF₄: effects of non-conservative collisions, concurrence with diffusion coefficients and contribution to the spatial profile of the swarm