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Title:
Observation of plasma jets in a table top plasma focus discharge
Authors:
Pavez, Cristian; Pedreros, José; Tarifeño-Saldivia, Ariel; Soto, Leopoldo
Affiliation:
AA(Comisión Chilena de Energía Nuclear, CCHEN, Casilla 188-D, Santiago, Chile; Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Santiago-Talca, Chile; Departamento de Ciencias Físicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, República 220, Santiago, Chile), AB(Comisión Chilena de Energía Nuclear, CCHEN, Casilla 188-D, Santiago, Chile; Departamento de Ingeniería Eléctrica, Universidad de Santiago de Chile, Santiago, Chile 0000-0003-1500-367X), AC(Comisión Chilena de Energía Nuclear, CCHEN, Casilla 188-D, Santiago, Chile; Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Santiago-Talca, Chile), AD(Comisión Chilena de Energía Nuclear, CCHEN, Casilla 188-D, Santiago, Chile; Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Santiago-Talca, Chile; Departamento de Ciencias Físicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, República 220, Santiago, Chile)
Publication:
Physics of Plasmas, Volume 22, Issue 4, id.040705 (PhPl Homepage)
Publication Date:
04/2015
Origin:
AIP
Abstract Copyright:
2015: AIP Publishing LLC
DOI:
10.1063/1.4919260
Bibliographic Code:
2015PhPl...22d0705P

Abstract

In the last years, medium size Z-pinch experiments operating at tens of kJ are being used to create supersonic plasma jets. Those experiments are produced with wire arrays and radial foils, and they are conducted in generators based on water-filled transmission lines. Also plasma jets have been observed in small X-pinch experiments operating at 1 kJ. In this work, observations of plasma jets produced in a table top plasma focus device by means of optical and digital interferometry are shown. The device was operated at only ˜70 J, achieving 50 kA in 150 ns. The plasma jets were observed after the pinch, in the region close and on the anode, along the axis. The electron density measured from the jets is in the range 1024-1025 m-3. From two consecutive plasma images separated 18 ns, the axial jet velocity was measured in the order of 4 × 104 m/s.
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