جهت دسترسی به کاربرگه ی زیر، از این لینک استفاده کنید. http://dl.pgu.ac.ir/handle/Hannan/82970
Title: Atomization and merging of two Al and W wires driven by a 1 kA, 10 ns current pulse
Keywords: Science & Technology;Physical Sciences;Physics, Fluids & Plasmas;Physics;ARRAY Z-PINCH;Fluids & Plasmas;0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics;0201 Astronomical And Space Sciences;0203 Classical Physics
Issue Date: 9-Nov-2016
24-Oct-2016
Publisher: AIP Publishing
Description: Possibility of preconditioning of wires in wire array Z-pinch loads by an auxiliary low-level current pulse was investigated in experiments with two aluminum or two polyimide-coated tungsten wires. It was found that the application of a 1 kA, 10 ns current pulse could convert all the length of the Al wires (1 cm long, 15 μm diameter) and ∼70% of length of the W wires (1 cm long, 15 μm diameter, 2 μm polyimide coating) into a gaseous state via ohmic heating. The expansion and merging of the wires, positioned at separations of 1–3 mm, were investigated with two-wavelength (532 nm and 1064 nm) laser interferometry. The gasified wire expanded freely in a vacuum and its density distribution at different times could be well described using an analytic model for the expansion of the gas into vacuum. Under an energy deposition around its atomization enthalpy of the wire material, the aluminum vapor column had an expansion velocity of 5–7 km/s, larger than the value of ∼4 km/s from tungsten wires. The dynamic atomic polarizabilities of tungsten for 532 nm and 1064 nm were also estimated.
URI: http://dx.doi.org/10.1063/1.4967358
Other Identifiers: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000389753400044&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
1089-7674
http://hdl.handle.net/10044/1/43419
675350-9958
Type Of Material: Other
Appears in Collections:Physics

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