Prolonged plasma production at current-driven implosion of wire arrays on Angara-5-1 facility

• Published in: IEEE transactions on plasma science Vol. 30; no. 2; pp. 559 - 566
• Main Authors: Alexandrov, V.V., Frolov, I.N., Fedulov, M.V., Grabovsky, E.V., Mitrofanov, K.N., Nedoseev, S.L., Oleinik, G.M., Porofeev, I.Yu, Samokhin, A.A., Sasorov, P.V., Smirnov, V.P., Volkov, G.S., Zurin, M.M., Zukakischvili, G.G.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-04-2002; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arrays; Compressing; Density; Imploding wires; Implosions; Magnetic field measurement; Magnetic fields; Magnetohydrodynamics; Physics; Plasma density; Plasma flow; Plasma measurements; Plasma properties; Plasma sources; Plasma turbulence; Plasma x-ray sources; Production; Stagnation; Surface resistance; Thermal conductivity; Wire; X ray radiography; X-rays
• ISSN: 0093-3813; 1939-9375
• DOI: 10.1109/TPS.2002.1024290

Results of experimental investigation and modeling of prolonged plasma production during implosion of cylindrical wire arrays are presented. Results of the radiography of dense cores of imploding wire array and the measurements of internal azimuthal magnetic field in wire array give new experimental evidences of prolonged plasma production phenomenon. This phenomenon is an important property of current-driven implosion of the wire arrays at current rise rates /spl sim/(0.5-1)10/sup 14/ A/s. The prolonged plasma production can determine the current and the density profiles before final stage of a Z pinch compression, and also in the moment of Z pinch stagnation. From this point of view, the requirement that residual uncompressed plasma should not shunt the current at the discharge periphery becomes of the greatest importance. The conditions exist when the prolonged plasma production isn't an obstacle for the achievement of high-power X-ray emission from Z pinch. Presented experimental results on multiwire array implosion can be explained on the basis of prolonged plasma production without referring to multiwire array azimuthal structure.