Magnetic cumulation

Sakharov, A. D.; Lyudaev, R. Z.; Smirnov, E. N.; Plyushchev, Yu I.; Pavlovskiĭ, A. I.; Chernyshev, V.K.; Феоктистова, Е. А.; Zharinov, E. A.; Zysin, Yu A.

doi:10.1070/pu1991v034n05abeh002495

Cited by 7 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To be effective for the inertial confinement fusion (ICF) range of plasma parameters (density several times higher than that of solid deuterium-tritium (DT), temperature from 7 to 10 keV), magnetic fields need to be $100 MG, beyond the reach of conventional technology of magnetic flux compression (MFC). [2][3][4][5][6][7] As first noted in Refs. 8-10, one can use the MFC method 2-7 thereby facilitating the ICF ignition if the liner is driven by the multi-Mbar pressures accessible to the present generation of high-energy lasers or pulsed power generators.…”

Section: Introductionmentioning

confidence: 83%

Magnetic flux and heat losses by diffusive, advective, and Nernst effects in magnetized liner inertial fusion-like plasma

Velikovich

Giuliani

Zalesak³

2015

Physics of Plasmas

View full text Add to dashboard Cite

The magnetized liner inertial fusion (MagLIF) approach to inertial confinement fusion [Slutz et al., Phys. Plasmas 17, 056303 (2010); Cuneo et al., IEEE Trans. Plasma Sci. 40, 3222 (2012)] involves subsonic/isobaric compression and heating of a deuterium-tritium plasma with frozen-in magnetic flux by a heavy cylindrical liner. The losses of heat and magnetic flux from the plasma to the liner are thereby determined by plasma advection and gradient-driven transport processes, such as thermal conductivity, magnetic field diffusion, and thermomagnetic effects. Theoretical analysis based on obtaining exact self-similar solutions of the classical collisional Braginskii's plasma transport equations in one dimension demonstrates that the heat loss from the hot compressed magnetized plasma to the cold liner is dominated by transverse heat conduction and advection, and the corresponding loss of magnetic flux is dominated by advection and the Nernst effect. For a large electron Hall parameter (x e s e ) 1), the effective diffusion coefficients determining the losses of heat and magnetic flux to the liner wall are both shown to decrease with x e s e as does the Bohm diffusion coefficient cT=ð16eBÞ, which is commonly associated with low collisionality and two-dimensional transport. We demonstrate how this family of exact solutions can be used for verification of codes that model the MagLIF plasma dynamics. V C 2015 AIP Publishing LLC.

show abstract

Section: Introductionmentioning

confidence: 83%

Magnetic flux and heat losses by diffusive, advective, and Nernst effects in magnetized liner inertial fusion-like plasma

Velikovich

Giuliani

Zalesak³

2015

Physics of Plasmas

View full text Add to dashboard Cite

show abstract

“…The MHD model does not take into account phase transitions and the effect of Joule heating on the state of the compressed matter. These factors severely restrict the last stage of implosion for classical magnetic cumulation [1][2][3] and may also be important for shock-wave magnetic cumulation. Notice that shock compression provides a way of abating the effect of Joule heating.…”

Section: Analysis Of Magnetic Cumulationmentioning

confidence: 99%

“…To generate a magnetic field of megagauss range (>100 T), magnetic flux compression by a metallic liner accelerated by an explosion of a condensed high explosive (HE) has been used since the 1960s [1][2][3]. Magnetohydrodynamic (MHD) instability of the liner-field interface has proved to be the main problem in the production of megagauss magnetic fields [4].…”

Section: Introductionmentioning

confidence: 99%

Model of shock-wave magnetic cumulation

Гилев¹

2008

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A shock-wave magnetic cumulation technique is used to generate a megagauss magnetic field in an aluminium powder under quasi-cylindrical geometry. A magnetohydrodynamic (MHD) model of shock-wave magnetic cumulation is proposed. The model is based on the Oh–Persson equation of state and experimental data on electrical conductivity of powders. The 1D simulation reveals the features of the MHD flow under converging of the cylindrical shock wave. The experimental record of the magnetic field in the generator is in reasonable agreement with simulation results. This fact validates the model and allows one to optimize the cumulation system for producing a higher magnetic field.

show abstract

“…[ 4,5 ] P. Kapitsa conducted the first experiments with very strong magnetic fields (up to 50–100 Tesla in a coil of 1 mm inner diameter during a few milliseconds) with the high magnetic energy density (B 2 /2μ o = 40 kJ cm −3 at 100 T) at the beginning of the 20th century. [ 6–8 ] The magneto‐cumulative generators, suggested by A. Sakharov almost 30 years later, allows obtaining magnetic fields ≈3000 T. [ 9–11 ] In 1958, at the newly created Novosibirsk Institute of Hydrodynamics, V.F. Minin began work on the generation of megagauss magnetic fields and electromagnetic acceleration of microparticles up to several km s −1 .…”

Section: Introductionmentioning

confidence: 99%

Optical Super‐Resonances in Mesoscale Dielectric Cenosphere: Giant Magnetic Field Generations

Minin,

Zhou,

Minin

2023

Annalen der Physik

View full text Add to dashboard Cite

Resonant light scattering by mesoscale dielectric spheres has received enormous attention and found many interesting applications. The recently emerged field of Mesotronics provides novel opportunities for wavelength‐scaled optics and new fundamental aspects are still being uncovered. It has recently been demonstrated that high‐order Mie resonances can be excited in homogeneous low‐dissipation mesoscale dielectric spheres, leading to the generation of intense magnetic fields. This article describes a simple and effective way to drastically enhance the superresonance effect. Proof‐of‐principle results for the first time show that yet one more novel phenomenon of increasing the intensity of the magnetic field without changing the resonant Mie size parameter of the sphere by introducing an air cavity. In such a dielectric cenosphere (from two Greek words “kenos”‐hollow and “sphaira”‐sphere), by correct choice of the air cavity size, it is possible to increase the intensity of the electromagnetic fields at the poles of the sphere by an order of magnitude due to increasing of the amplitude of resonant partial wave coefficient.

show abstract

Magnetic cumulation

Cited by 7 publications

References 0 publications

Magnetic flux and heat losses by diffusive, advective, and Nernst effects in magnetized liner inertial fusion-like plasma

Magnetic flux and heat losses by diffusive, advective, and Nernst effects in magnetized liner inertial fusion-like plasma

Model of shock-wave magnetic cumulation

Optical Super‐Resonances in Mesoscale Dielectric Cenosphere: Giant Magnetic Field Generations

Contact Info

Product

Resources

About