Wire array experiments in a low impedance and low current generator
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Archivos
Fecha
2015-03
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Institute of Physics Publishing
Nombre de Curso
Licencia CC
Atribution 4.0 International (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
In this work, a preliminary study about the behavior of a low impedance
generator on different wire array configurations is reported. The experimental measurements
were carried out on a small multi-purpose generator (1.2μF, 345J, 47.5nH, T/4=375 ns and
Z=0.2 in short circuit) which produces currents up to 122 kA with 500 ns quarter period,
when a charging voltage of 24kV and a wire load are used. Two types of configurations were
tested: parallel wires (two and four) and X-pinch configurations. The experiments were carried
out on W, Al, and Cu wires with different diameters. The discharge was characterized by
means of a set of diagnostics which included: Rogowski coil; filtered PCD detector; filtered
PIN diode; gated VUV/soft X-ray pinhole camera, Shadow diagnostic and dark field Schlieren
technique. From the set of experimental results, the following observations can be established:
(i) The generator is highly sensitive to the changes of load impedance due to its low impedance
design. (ii) Every shot shows a dip in the current derivative signal shortly after the discharge
onset time (from 6 to 40 ns), which is inversely related to the load resistance. (iii) Both
configurations show a similar dynamic to those observed in experiments of higher current and
shorter quarter period. (iv) At the X-pinch experiments, two or more hard X-ray bursts are
detected, around 200 ns from the current onset time. These X-ray bursts are correlated with the
dips observed in the current derivative signal.
Notas
Indexación: Scopus.
Palabras clave
Low Impedance Generator, Low Current, Multi-Purpose Generator
Citación
Journal of Physics: Conference Series. Volume 591, Issue 1. 24 March 2015. Article number 01202615th Latin American Workshop on Plasma Physics, LAWPP 2014 and 21st IAEA TM on Research Using Small Fusion Devices, RUSFD 2014. San Jose. 27 January 2014through 31 January 2014. Code 113197
DOI
10.1088/1742-6596/591/1/012026