A 1MA, variable risetime pulse generator for high energy density plasma research

COBRA is a 0.5Ω pulse generator driving loads of order 10nH inductance to >1MA current. The design is based on independently timed, laser-triggered switching of four water pulse-forming lines whose outputs are added in parallel to drive the load current pulse. The detailed design and operation of...

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Veröffentlicht in:Review of scientific instruments 2008-07, Vol.79 (7)
Hauptverfasser: Greenly, J. B., Douglas, J. D., Hammer, D. A., Kusse, B. R., Glidden, S. C., Sanders, H. D.
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container_issue 7
container_start_page
container_title Review of scientific instruments
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creator Greenly, J. B.
Douglas, J. D.
Hammer, D. A.
Kusse, B. R.
Glidden, S. C.
Sanders, H. D.
description COBRA is a 0.5Ω pulse generator driving loads of order 10nH inductance to >1MA current. The design is based on independently timed, laser-triggered switching of four water pulse-forming lines whose outputs are added in parallel to drive the load current pulse. The detailed design and operation of the switching to give a wide variety of current pulse shapes and rise times from 95to230ns is described. The design and operation of a simple inductive load voltage monitor are described which allows good accounting of load impedance and energy dissipation. A method of eliminating gas bubbles on the underside of nearly horizontal insulator surfaces in water was required for reliable operation of COBRA; a novel and effective solution to this problem is described.
doi_str_mv 10.1063/1.2949819
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title A 1MA, variable risetime pulse generator for high energy density plasma research
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