Impact of helix geometry on MCG flux losses

T. Holt, A. Neuber, J. Dickens, M. Kristiansen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Explosively driven magnetic flux compression has been the object of research for more than three decades. Recently heightened interest has been focused on the basic physical mechanisms that determine the performance of helical Magneto Cumulative Generators (MCGs). Two single-pitch helical flux compression generators of different sizes have been tested using current-voltage probes and optical diagnostics. The main parameters used to characterize the experimental performance of the flux compression generators were the flux conservation and theoretical current gain of each type of generator. Helices with constant pitch and differing separation between wires as well as wires with different insulation thickness were tested and analyzed with respect to their flux conservation and theoretical current gain. Preliminary results show that the insulation thickness plays only a minor role for a change in flux conservation due to geometry in the range from 0.01 to 0.5 mm provided that no internal breakdown occurred. Additionally, the overall physical dimension of the generator was modified to allow for a substantial increase in initial inductance. The outer diameter of the generator armature was held constant at 1.5 inches and the coil diameter was varied from 2.6 to 3.5 inches (expansion ratio of 1.7 or 2.3, respectively). The results gained from the conservative expansion ratio of 1.7 were used as a base to compare to the generator performance at the more aggressive expansion ratio of 2.3. First results show that an expansion ratio of 2.3 produces viable results for a partially annealed Aluminum armature with a Gurney angle of approximately 15 degrees.

Original languageEnglish
Title of host publicationPPPS 2001 - Pulsed Power Plasma Science 2001
EditorsRobert Reinovsky, Mark Newton
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages905-908
Number of pages4
ISBN (Electronic)0780371208, 9780780371200
DOIs
StatePublished - 2001
Event28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference, PPPS 2001 - Las Vegas, United States
Duration: Jun 17 2001Jun 22 2001

Publication series

NamePPPS 2001 - Pulsed Power Plasma Science 2001
Volume2

Conference

Conference28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference, PPPS 2001
CountryUnited States
CityLas Vegas
Period06/17/0106/22/01

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    Holt, T., Neuber, A., Dickens, J., & Kristiansen, M. (2001). Impact of helix geometry on MCG flux losses. In R. Reinovsky, & M. Newton (Eds.), PPPS 2001 - Pulsed Power Plasma Science 2001 (pp. 905-908). [1001684] (PPPS 2001 - Pulsed Power Plasma Science 2001; Vol. 2). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PPPS.2001.1001684