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Abstract:

Plasma shocks can be magnetically driven during high current discharges in low-pressure gases, induced by an external electric circuit. Radial currents between two coaxial electrodes can be accelerated to velocities of the order of 10 cm μs-1, thus being an effective method to transform potential energy in kinetic energy. A series of experiments were conducted using a low energy plasma focus device to measure the dynamics of plasma shocks in coaxial tubes. The radial position of the current sheath near the closed end of the electrodes was determined by means of a magnetic probe. The pinching time at the open end of the electrodes was measured using a Rogowski coil. Both, the movement and shaping of the plasma sheath were modelled by means of finite elements. The sheath was represented by coupled conical segments carrying current, mass, internal energy and momentum. The Lorentz force accelerates each element in its normal direction, which leads to the continuous reshaping of the sheath. The numerical results are compared against the experimental data showing good agreement.

Registro:

Documento: Artículo
Título:Experimental study and two-dimensional modelling of the plasma dynamics of magnetically driven shock waves in a coaxial tube
Autor:Moreno, C.; Casanova, F.; Correa, G.; Clausse, A.
Filiación:Inst. de Fisica del Plasma-PLADEMA, Departamento de Física, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
PLADEMA, CNEA-CONICET, Universidad Nacional del Centro, 7000 Tandil, Argentina
Palabras clave:Electric discharges; Electrodes; Finite element method; Magnetic field effects; Mathematical models; Plasma devices; Plasma sheaths; Shock tubes; Coaxial tubes; Lorentz force; Plasma dynamics; Plasma shock waves
Año:2003
Volumen:45
Número:12
Página de inicio:1989
Página de fin:1999
DOI: http://dx.doi.org/10.1088/0741-3335/45/12/001
Título revista:Plasma Physics and Controlled Fusion
Título revista abreviado:Plasma Phys Controlled Fusion
ISSN:07413335
CODEN:PLPHB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07413335_v45_n12_p1989_Moreno

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Citas:

---------- APA ----------
Moreno, C., Casanova, F., Correa, G. & Clausse, A. (2003) . Experimental study and two-dimensional modelling of the plasma dynamics of magnetically driven shock waves in a coaxial tube. Plasma Physics and Controlled Fusion, 45(12), 1989-1999.
http://dx.doi.org/10.1088/0741-3335/45/12/001
---------- CHICAGO ----------
Moreno, C., Casanova, F., Correa, G., Clausse, A. "Experimental study and two-dimensional modelling of the plasma dynamics of magnetically driven shock waves in a coaxial tube" . Plasma Physics and Controlled Fusion 45, no. 12 (2003) : 1989-1999.
http://dx.doi.org/10.1088/0741-3335/45/12/001
---------- MLA ----------
Moreno, C., Casanova, F., Correa, G., Clausse, A. "Experimental study and two-dimensional modelling of the plasma dynamics of magnetically driven shock waves in a coaxial tube" . Plasma Physics and Controlled Fusion, vol. 45, no. 12, 2003, pp. 1989-1999.
http://dx.doi.org/10.1088/0741-3335/45/12/001
---------- VANCOUVER ----------
Moreno, C., Casanova, F., Correa, G., Clausse, A. Experimental study and two-dimensional modelling of the plasma dynamics of magnetically driven shock waves in a coaxial tube. Plasma Phys Controlled Fusion. 2003;45(12):1989-1999.
http://dx.doi.org/10.1088/0741-3335/45/12/001