Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 27 / Number 2
J. H. Degnan, W. L. Baker, M. L. Alme, C. Boyer, J. S. Buff, J. D. Beason, C. J. Clouse, S. K. Coffey, D. Dietz, M. H. Frese, J. D. Graham, D. J. Hall, J. L. Holmes, E. A. Lopez, R. E. Peterkin, Jr., D. W. Price, N. F. Roderick, S. W. Seiler, C. R. Sovinec, P. J. Turchi
Fusion Science and Technology
Volume 27 / Number 2 / March 1995 / Pages 115-123
Format:electronic copy (download)
Electromagnetic implosions of shaped cylindrical aluminum liners that remain at solid density are discussed. The approximate liner parameters have an initial radius of 3 to 4 cm, are 4 cm in height, and are ∼0.1 cm thick. The liners are driven by the Shiva Star 1300-µf capacitor bank at an 84-kV charging voltage and an ∼30-nH total initial inductance (including implosion load). The discharge current travels along the length of the liner and rises to 14 MA in ∼8 µs. The implosion time is ∼12 µs. Diagnostics include inductive current and capacitive voltage probes, magnetic probes, and radiography. Both right-circular cylinder and conical liner implosion data are displayed and discussed. Radiography indicates implosion behavior substantially consistent with two-dimensional magnetohydrodynamic calculations, which predict inner surface implosion velocities exceeding 20 km/s, and compressed density of two to three times solid density. Less growth of perturbations is evident for the conical liner (∼1% thickness tolerance) than for the right-circular cylindrical liner (∼3% thickness tolerance).
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