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Abstract:

Absorption of electrical energy provided to a metal wire in an exploding wire system is thought to be terminated or greatly diminished when the plasma is formed, after the joule heating of the metallic wire by the electrical current. Accordingly, it is common to account for the electrical energy delivered to the wire that the integration of current and voltage signals is halted when the voltage peak changes its slope. Usually, this moment is synchronized with the plasma appearance, as detected by optical sensors. In this work, experimental evidence of a two-step electrical energy absorption in an exploding wire surrounded by atmospheric air is presented. During the first step of the energy absorption the plasma is not formed, indicating that the delivered energy is not enough for ionizing the wire, giving place to a dark pause that lasts until a second energy absorption produces a plasma. The delay between the two steps can reach ≈2.2 s for copper wires of 50 m diameter charged at an initial voltage of 10 kV. Experimental investigation of variation of the delay between the two steps with different metals, charging voltages, and wire diameters are presented. A relation of the current density with the initial kinetic energy of the plasma and the electrical current rate is devised as a possible explanation of the observed phenomena. Copyright © Cambridge University Press 2016.

Registro:

Documento: Artículo
Título:Exploding wire energy absorption dynamics at slow current rates
Autor:Rodríguez Prieto, G.; Bilbao, L.; Milanese, M.
Filiación:Universidad de Castilla-la Mancha, I.N.E.I., Ciudad Real, 13071, Spain
Instituto de Física Del Plasma, UBA-CONICET, Buenos Aires, 1428, Argentina
CONICET, Universidad Nacional Del Centro de la Provincia de Buenos Aires, Instituto de Física Arroyo Seco - Facultad de Ciencias Exactas, Tandil, 7000, Argentina
Palabras clave:Dark pause; Energy absorption dynamics; Exploding wires; Energy absorption; Kinetic energy; Kinetics; Absorption dynamics; Charging voltage; Dark pause; Electrical current; Electrical energy; Experimental evidence; Experimental investigations; Initial kinetics; Exploding wires
Año:2017
Volumen:35
Número:1
Página de inicio:26
Página de fin:32
DOI: http://dx.doi.org/10.1017/S0263034616000756
Título revista:Laser and Particle Beams
Título revista abreviado:Laser Part Beams
ISSN:02630346
CODEN:LPBED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02630346_v35_n1_p26_RodriguezPrieto

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Citas:

---------- APA ----------
Rodríguez Prieto, G., Bilbao, L. & Milanese, M. (2017) . Exploding wire energy absorption dynamics at slow current rates. Laser and Particle Beams, 35(1), 26-32.
http://dx.doi.org/10.1017/S0263034616000756
---------- CHICAGO ----------
Rodríguez Prieto, G., Bilbao, L., Milanese, M. "Exploding wire energy absorption dynamics at slow current rates" . Laser and Particle Beams 35, no. 1 (2017) : 26-32.
http://dx.doi.org/10.1017/S0263034616000756
---------- MLA ----------
Rodríguez Prieto, G., Bilbao, L., Milanese, M. "Exploding wire energy absorption dynamics at slow current rates" . Laser and Particle Beams, vol. 35, no. 1, 2017, pp. 26-32.
http://dx.doi.org/10.1017/S0263034616000756
---------- VANCOUVER ----------
Rodríguez Prieto, G., Bilbao, L., Milanese, M. Exploding wire energy absorption dynamics at slow current rates. Laser Part Beams. 2017;35(1):26-32.
http://dx.doi.org/10.1017/S0263034616000756