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INPIStron switched pulsed power for dense plasma pinchesThe inverse plasma switch INPIStron was employed for 10kJ/40kV capacitor bank discharge system to produce focused dense plasmas in hypocycloidal-pinch (HCP) devices. A single unit and an array of multiple HCP's were coupled as the load of the pulsed power circuit. The geometry and switching plasma dynamics were found advantageous and convenient for commutating the large current pulse from the low impedance transmission line to the low impedance plasma load. The pulse power system with a single unit HCP, the system A, was used for production of high temperature plasma focus and its diagnostics. The radially running down plasma dynamics, revealed in image converter photographs, could be simulated by a simple snow-plow model with a correction for plasma resistivity. The system B with an array of 8-HCP units which forms a long coaxial discharge chamber was used for pumping a Ti-sapphire laser. The intense UV emission from the plasma was frequency shifted with dye-solution jacket to match the absorption band of the Ti crystal laser near 500 nm. An untuned laser pulse energy of 0.6 J/pulse was obtained for 6.4 kJ/40 kV discharge, or near 103 times of the explosion limit of conventional flash lamps. For both systems the advantages of the INPIStron were well demonstrated: a single unit is sufficient for a large current (greater than 50 kA) without increasing the system impedance, highly reliable and long life operation and implied scalability for the high power ranges above I(sub peak) = 1 MA and V(sub hold) = 100 kV.
Document ID
19940016821
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Han, Kwang S.
(Hampton Univ. VA, United States)
Lee, Ja H.
(Hampton Univ. VA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Research on Plasma-Puff Initiation of High Coulomb Transfer Switches
Subject Category
Plasma Physics
Meeting Information
Meeting: International Pulsed Conference
Location: Albuquerque, NM
Country: United States
Start Date: June 21, 1993
End Date: June 23, 1993
Accession Number
94N21294
Funding Number(s)
CONTRACT_GRANT: NAG1-970
CONTRACT_GRANT: N00014-89-J-1653
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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