Nuclear Scattering and Suprathermal Fusion

Kumar, Anil; Ligou, J.; Nicli, S.

doi:10.13182/fst87-a25079

Cited by 7 publications

(5 citation statements)

References 11 publications

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“…It is interesting to note that similar results have been obtained by those working on fusion chain-reactions (GRYZINSKI, 1958, for more up to date calculations and references see KUMAR et al, 1987) and light-ion inertial confinement fusion.…”

Section: I' I Isupporting

confidence: 74%

Beam-target fusion in a dense Z-pinch

Linhart¹

1988

Plasma Phys. Control. Fusion

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It is shown that a beam of tritons, whose energy is of the order of 200 keV striking a deuterium plasma can produce fusion energy in excess of their kinetic energy provided the plasma temperature is higher than 2.3 * 10' (K). In very dense Z-pinches the range of such T-beams is compatible with the length of the pinch. In particular if the pinch becomes m = 0 unstable and produces D and T beams in situ one may expect a very large neutron output as a result of beam-plasma interaction.

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Section: I' I Isupporting

confidence: 74%

Beam-target fusion in a dense Z-pinch

Linhart¹

1988

Plasma Phys. Control. Fusion

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“…For a finite-temperature, infinite plasma, however, Afek et al (1978) have found lower critical densities; for instance, 1.0×10 27 ions/cm -3 at 𝑇 = 𝑇 = 14 keV and 𝑛 𝑛 ⁄ = 0.64. For the finite-temperature, finite-size case, Kumar et al (1986) have estimated an upper bound of 0.5 for the suprathermal fusion probability associated to the DT neutron in a pellet compressed to a thickness (𝜌𝑟) of a few g/cm 2 , at a density of 6.0×10 25 ions/cm 3 (roughly 1000 times the solid density), 𝑇 = 𝑇 = 40 keV, and 𝑛 𝑛 ⁄ = 1. We conclude that the suprathermal contribution to the fusion yield is substantially lower in H 11 B fuel compared to DT fuel, in similar plasma conditions and for cases of practical interest.…”

Section: Discussionmentioning

confidence: 99%

“…Studies of this kind exist for DT fuel (e.g. Brueckner and Brysk, 1973;Peres and Shvarts, 1975;Afek et al, 1978;Kumar et al, 1986) and will briefly be outlined in Sect. 4.…”

Section: Introductionmentioning

confidence: 99%

On a fusion chain reaction via suprathermal ions in high-density H–¹¹B plasma

Belloni¹

2021

Plasma Phys. Control. Fusion

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The 11B(p,3α) fusion reaction is particularly attractive for energy production purposes because of its aneutronic character and the absence of radioactive species among reactants and products. Its exploitation in the thermonuclear regime, however, appears to be prohibitive due to the low reactivity of the H–11B fuel at temperatures up to 100 keV. A fusion chain sustained by elastic collisions between the α particles and fuel ions, this way scattered to suprathermal energies, has been proposed as a possible route to overcome this limitation. Based on a simple model, this work investigates the reproduction process in an infinite, non-degenerate H–11B plasma, in a wide range of densities and temperatures which are of interest for laser-driven experiments ( 10 24 ≲ n e ≲ 10 28 cm − 3 , T e ≲ 100 keV , T i ∼ 1 keV ). In particular, cross section data for the α–p scattering which include the nuclear interaction have been used. The multiplication factor, k ∞ , increases markedly with electron temperature and less significantly with plasma density. However, even at the highest temperature and density considered, and despite a more than twofold increase by the inclusion of the nuclear scattering, k ∞ turns out to be of the order of 10−2 only. In general, values of k ∞ very close to 1 are needed in a confined scheme to enhance the suprathermal-to-thermonuclear energy yield by factors of up to 103 or 104.

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“…In a scenario of this kind, each primary α-particle or fusion event can be treated independently through a simplified model compared with more sophisticated kinetic-theory approaches, which are indispensable at high reaction rates; see, e.g., refs. [29][30][31] for the case of DT fusion, and [20] for H-11 B fusion. e simplified approach of ref.…”

Section: Suprathermal Fusion Chainmentioning

confidence: 99%

Multiplication Processes in High-Density H-¹¹B Fusion Fuel

Belloni

2022

Laser Part. Beams

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Proton-boron fusion would offer considerable advantages for the purpose of energy production as the reaction is aneutronic and does not involve radioactive species. Its exploitation, however, appears to be particularly challenging due to the low reactivity of the H-11B fuel at temperatures up to 100 keV. Fusion chain-reaction concepts have been proposed as possible means to overcome this limitation. Relevant findings are reviewed in this article. Energy-amplification processes are also presented, which are of interest for beam-fusion experiments and fast ignition of H-11B fuel. Directions for further work are outlined as well.

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Nuclear Scattering and Suprathermal Fusion

Cited by 7 publications

References 11 publications

Beam-target fusion in a dense Z-pinch

Beam-target fusion in a dense Z-pinch

On a fusion chain reaction via suprathermal ions in high-density H–¹¹B plasma

Multiplication Processes in High-Density H-¹¹B Fusion Fuel

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Nuclear Scattering and Suprathermal Fusion

Cited by 7 publications

References 11 publications

Beam-target fusion in a dense Z-pinch

Beam-target fusion in a dense Z-pinch

On a fusion chain reaction via suprathermal ions in high-density H–11B plasma

Multiplication Processes in High-Density H-11B Fusion Fuel

Contact Info

Product

Resources

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On a fusion chain reaction via suprathermal ions in high-density H–¹¹B plasma

Multiplication Processes in High-Density H-¹¹B Fusion Fuel