Magnetic course generators using the transition of a semiconductor material into a conducting state

Bichenkov, E. I.; Гилев, С. Д.; Trubachev, A. M.

doi:10.1007/bf00910173

Cited by 8 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite a significant difference in the final magnetic field, the values of the exponent α for different experimental arrangements were close to each other. This confirms that model (1) can be used in the near megagauss range of magnetic fields.…”

Section: Gilevsupporting

confidence: 85%

“…The period when the finite electrical conductivity of the substance is not manifested can be estimated based on the electrical engineering model of cumulation [1]. This approach yields the generation condition u/D R/L (R is the resistance of the layer anḋ L is the derivative of inductance with respect to time), whence there follows the relation t 1/μ 0 σu(D − u) (σ is the electrical conductivity of the shock-compressed substance and μ 0 is the magnetic constant of vacuum).…”

Section: Gilevmentioning

confidence: 99%

“…Shock-wave cumulation of the magnetic field is a method for obtaining superstrong magnetic fields and high electromagnetic energy densities [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The method is based on the property inherent in a large group of materials to acquire high electrical conductivity under shock compression.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study of shock-wave magnetic cumulation

Гилев

2008

Combust Explos Shock Waves

Self Cite

View full text Add to dashboard Cite

Experiments with aluminum, copper, and silicon powders are performed to study the mechanism of shock-wave magnetic cumulation. For all substances examined, the magnetic field as a function of the cavity area is described by a power dependence with a constant exponent α. The value of α depends substantially on the substance porosity and particle size. For copper and silicon powders and for small-size aluminum powder, the value of α is consistent with the ratio of the particle velocity u to the wave velocity D, as is predicted by a simple model of magnetic cumulation. For the fine and coarse aluminum powders, the value of α is noticeably smaller than the ratio u/D. The lower effectiveness of magnetic compression can be attributed to insufficiently high electrical conductivity (fine powder) and the emergence of conductivity with incomplete compression of the substance (coarse powder). In the first case, diffusion losses of the magnetic flux in the compressed substance are fairly noticeable. In the second case, the work against the magnetic forces is performed by a layer in the shocktransition region, which has a lower particle velocity. The mechanism of magnetic cumulation involves substance metallization under shock compression and expelling of some portion of the magnetic flux to the non-conducting region ahead of the shock front. The two-stage mechanism of cumulation known in the literature (metallization in the elastic precursor and subsequent compression of the field in the main wave) is not validated by experiments with measurements of the particle and wave velocities and electrical conductivity and by experiments on magnetic cumulation.

show abstract

Section: Gilevsupporting

confidence: 85%

Section: Gilevmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study of shock-wave magnetic cumulation

Гилев

2008

Combust Explos Shock Waves

Self Cite

View full text Add to dashboard Cite

show abstract

“…First, the agreement between the kinematic parameters of the metallization wave and the shock wave serves as a reliable confirmation of the shock-wave magnetic cumulation mechanism proposed in [1][2][3][4][5][6]. The shock wave expels a certain portion of the magnetic flux ahead of the shock front, where the magnetic field is generated.…”

Section: Discussionmentioning

confidence: 52%

“…The insulator-metal transition in high-porous powders is used to produce megagauss magnetic fields by the shockwave magnetic cumulation method [1][2][3][4][5][6][7][8][9][10][11][12][13]. An initially nonconductive powder acquires electrical conductance in a shock wave and compresses a prior generated magnetic flux.…”

Section: Introductionmentioning

confidence: 99%

Kleinman Relation in the 3rd-Order Nonlinear Susceptibility of Dye Solutions

Saikan¹

1984

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

The paper describes a magnetoelectrical technique for monitoring the particle velocity in matter acquiring a large electrical conductivity under shock compression. The particle velocity is measured in the electromagnetic skin layer, which travels through matter with a wave velocity. The layer thickness essentially depends on the electrical conductivity of shock-compressed matter. A multielectrode cell also allows the wave velocity to be registered at various spatial bases. Experiments give kinematics parameters of a metallization wave for aluminium powders of varied mass density and particle size. The results unambiguously testify that the conductivity of the aluminium powder arises in the main shock wave carrying full pressure. The results do not confirm the conclusion of Novac et al about metallization of the aluminium powder in an elastic precursor. The thickness of the skin layer for a coarse powder is smaller than the thickness of the shock-compression zone, which offers the opportunity of finding the metallization phase directly in the shock transition zone.

show abstract