Increased Ion Temperature and Neutron Yield Observed in Magnetized Indirectly Driven 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">D</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
-Filled Capsule Implosions on the National Ignition Facility

Moody, J. D.; Pollock, B.; Sio, H.; Strozzi, D. J.; Ho, D.; Walsh, Christopher A.; Lahmann, B.; Kucheyev, S. O.; Kozioziemski, B.; Carroll, Evan; Kroll, J. J.; Yanagisawa, D. K.; Angus, J. R.; Bachmann, B.; Bhandarkar, S. D.; Bude, J.; Divol, L.; Ferguson, B.; Fry, J.; Hagler, L.; Hartouni, E. P.; Herrmann, Mark; Hsing, W. W.; Holunga, D. M.; Izumi, N.; Javedani, J.B.; Johnson, Anthony J.; Khan, S. F.; Kalantar, D.; Kohut, T.; Logan, B.G.; Masters, N.; Nikroo, A.; Orsi, N.; Piston, K.; Provencher, C.; Rowe, Arlen W.; Sater, J.; Skulina, K.; Stygar, W. A.; Tang, V.; Winters, Scott; Zimmerman, G. B.; Adrian, Patrick; Chittenden, J. P.; Appelbe, Brian; Boxall, Aidan; Crilly, Aidan; O'Neill, Shane A.; Davies, J. R.; Peebles, J.; Fujioka, Shinsuke

doi:10.1103/physrevlett.129.195002

Cited by 24 publications

(8 citation statements)

References 50 publications

(70 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5] and [4] in the relativistic laser intensity regime. Our mechanism also demonstrates pure laser-driven generation of axial magnetic fields with amplitudes that are similar to the method using a pulsed-power-driven coil [29].…”

mentioning

confidence: 64%

Generating axial magnetic fields via two plasmon decay driven by a twisted laser

J¹,

Lian²,

Yin³

et al. 2022

Preprint

View full text Add to dashboard Cite

We propose a new way of axial magnetic fields generation in a non-relativistic laser intensity regime by using a twisted light carrying orbital angular momentum (OAM) to stimulate two-plasmon decay (TPD) in a plasma. The growth of TPD driven by an OAM light in a Laguerre-Gauss (LG) mode is investigated through three dimensional fluid simulations and theory. A theory based on the assumption that the electron plasma waves (EPWs) are locally driven by a number of local plane-wave lasers predicts the maximum growth rate proportional to the peak amplitude of the pump laser field and is verified by the simulations. The OAM conservation during its transportation from the laser to the TPD daughter EWPs is shown by both the theory and the simulations. The theory predicts generation of ∼ 40T axial magnetic fields through the OAM absorption via TPD, which has perspective applications in the field of high energy density physics.

show abstract

mentioning

confidence: 64%

Generating axial magnetic fields via two plasmon decay driven by a twisted laser

J¹,

Lian²,

Yin³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Given that the magnetic moment of the deuteron is +0.857 magnetons [7], the reactants' orientation can be influenced by the application of either an electric or magnetic field vector. This hypothesis is interesting in light of the recent findings of J. D. Moody, et al (2022), where an applied magnetic field tripled inertial confinement fusion reaction efficiency. [8]…”

Section: Discussionmentioning

confidence: 89%

A potential barrier arises naturally between alternating - 1/3 and + 2/3 charge sequences: Implications for nuclear fusion

Walsh

2023

Preprint

View full text Add to dashboard Cite

Nuclear fusion is the source of the sun’s energy, and billions of dollars have been invested in bringing fusion power home to planet Earth. Understanding how to overcome the Coulomb potential energy barrier is the central challenge. The recently-published magnetic ‘Coulomb’ barrier apparatus provides a pre-university classroom demonstration of an analogous magnetic potential energy barrier. The goal of this follow-on manuscript is to extend and transform the simplistic magnetic model into a representational electrostatic model useful to undergraduate and graduate students drawn to the challenge of controlled nuclear fusion. In light of Maxwell’s unification of electricity and magnetism, this paper first presents an electrostatic analog of the magnetic “Coulomb” barrier. This establishes a causal link between alternating/unequal charge and the manifestation of a force barrier similar to the barrier demonstrated by the magnet model. Then, using the method described in US Patent 11,087,920 B2, a potential barrier is shown to arise quite naturally from opposing sequences of equally spaced, alternating -1/3e and +2/3e charge (the equivalents of quark charge) when these charges occur at regular intervals equal to the proton’s radius. These surprising findings support the hypothesis that quarks alternate in average positions within the nucleus. The average quark position hypothesis is then applied to deuteron-deuteron’ fusion, which demonstrates how the Coulomb barrier height depends on the orientation of each reactant as they approach one another. An antiparallel approach indicates a Coulomb barrier height less than half that of the axial approach. Given that the deuteron is an electric dipole, conducting fusion within a strong magnetic or electric field may control reactant orientation and lead to higher fusion efficiency.

show abstract

“…In experiments that are designed using codes that incorporate magnetisation effects on hydrodynamics but not including magnetisation effects on LPIs, the observed hot spot shape is more elongated along the magnetic field than expected (Moody et al. 2022). Subsequent experiments using manually adjusted laser drive manage to restore the symmetry, suggesting that MagLPIs likely contribute to the discrepancy.…”

Section: Introductionmentioning

confidence: 98%

Benchmarking magnetised three-wave coupling for laser backscattering: analytic solutions and kinetic simulations

Shi

2023

J. Plasma Phys.

View full text Add to dashboard Cite

Understanding magnetised laser–plasma interactions is important for controlling magneto-inertial fusion experiments and developing magnetically assisted radiation and particle sources. For nanosecond pulses at non-relativistic intensities, interactions are dominated by coherent three-wave interactions, whose nonlinear coupling coefficients became known only recently when waves propagate at oblique angles with the magnetic field. In this paper, backscattering coupling coefficients predicted by warm-fluid theory are benchmarked using particle-in-cell simulations in one spatial dimension, and excellent agreements are found for a wide range of plasma temperatures, magnetic field strengths and laser propagation angles, when the interactions are mediated by electron-dominant hybrid waves. Systematic comparisons between theory and simulations are made possible by a rigorous protocol. On the theory side, the initial boundary value problem of linearised three-wave equations is solved, and the transient-time solutions allow the effects of growth and damping to be distinguished. On the simulation side, parameters are carefully chosen and calibration runs are performed to ensure that comparisons are well controlled. Fitting simulation data to analytical solutions yields numerical growth rates that match theory predictions within error bars. Although warm-fluid theory is found to be valid for a wide parameter range, genuine kinetic effects have also been observed.

show abstract

Increased Ion Temperature and Neutron Yield Observed in Magnetized Indirectly Driven D2 -Filled Capsule Implosions on the National Ignition Facility

Cited by 24 publications

References 50 publications

Generating axial magnetic fields via two plasmon decay driven by a twisted laser

Generating axial magnetic fields via two plasmon decay driven by a twisted laser

A potential barrier arises naturally between alternating - 1/3 and + 2/3 charge sequences: Implications for nuclear fusion

Benchmarking magnetised three-wave coupling for laser backscattering: analytic solutions and kinetic simulations

Contact Info

Product

Resources

About