Shock-wave method of generating megagauss magnetic fields

Two alternatives of magnetic cumulation

“…General energy estimates for a simple model of a compressible medium in which a shock wave transforms the material into an ideal conductor by packing it from the initial density P0 to the final density pf [23], and more detailed calculations [24] showed the fundamental dependence of the potentials of the method on the packing parameter n = PJPo = D/(D -u) and led to the following results.…”

“…However, in spite of this, compression of a magnetic field with a material has a number of advantages due to generation of a current in a '~fresh" conducting material and the possibility of using hydrodynamic cumulation to increase attainable magnetic fields. The shock-wave method provided fields of 3.5 MG with a very good magnetic field amplification factor ~ = B/Bo ~ 90 [23][24][25].…”

Experimental study of shock-wave magnetic cumulation

“…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.…”

“…The method of shock-wave cumulation has a number of advantages over the known methods: a simpler system for initiation and generation of the initial magnetic field, better stability of the compression process, protection of the measurement region, etc. A magnetic field of ≈3.5 MG was registered in experiments with high-porosity aluminum [10][11][12], which corresponds to an electromagnetic energy density of ≈5 ·10 4 J/cm 3 and magnetic pressure of ≈50 GPa. The first investigations in this area were performed at the Lavrent'ev Institute of Hydrodynamics of the Siberian Division of the Russian Academy of Sciences (Russia) and at the Kumamoto University (Japan).…”

“…The main efforts in the early research [3,4,6,8,[10][11][12] were focused on obtaining the maximum possible magnetic fields and on the theoretical analysis of cumulation in simple model statements. As the parameters of state of the substance were unknown, the experiments and model problems could not be compared.…”