DocumentCode :
2567055
Title :
Implosion dynamics of z-pinch loads in two-stage wire arrays z-pinches
Author :
Lebedev, S.V. ; Harvey-Thompson, A.J. ; Khoory, E. ; Bennett, M. ; Bland, S.N. ; Burdiak, G. ; Chittenden, J.P. ; De Grouchy, P. ; Hall, G.N. ; Pickworth, L. ; Suzuki-Vidal, F. ; Skidmore, J. ; Swadling, G.F. ; Suttle, L.
Author_Institution :
Blackett Lab., Imperial Coll. London, London, UK
fYear :
2012
fDate :
8-13 July 2012
Abstract :
We will present experiments on the MAGPIE facility (1.5MA, 250ns) in which an inverse wire array1 (with the wires acting as a return current cage placed around a central current conductor) operated as a fast current switch. This allowed to significantly reduce the rise-time of the current pulse (<;100ns) delivered to a separate, standard imploding wire array z-pinch load. The set-up also generates a current pre-pulse in the load array, which significantly changes the implosion dynamics of the load2. We will discuss how pre-conditioning of the load array wires by the current pre-pulse depends on wire materials (Al, Cu, W) used in the load and the exploding wire arrays. We will also present experimental results towards formation of shell-like loads by merging of plasmas of expanded pre-conditioned wires. Investigations of the implosion dynamics of single wires, uniformly pre-expanded to ~3mm diameter before application of the fast rising MA level current, will be also presented.
Keywords :
aluminium; copper; explosions; plasma switches; plasma transport processes; tungsten; wires; Al; Cu; MAGPIE facility; W; current pulse; fast current switch; implosion dynamics; inverse wire array; load array wires; shell-like loads; two-stage wire arrays Z-pinches; Conductors; Educational institutions; Laboratories; Materials; Standards; Switches; Wires;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science (ICOPS), 2012 Abstracts IEEE International Conference on
Conference_Location :
Edinburgh
ISSN :
0730-9244
Print_ISBN :
978-1-4577-2127-4
Electronic_ISBN :
0730-9244
Type :
conf
DOI :
10.1109/PLASMA.2012.6384033
Filename :
6384033
Link To Document :
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