DocumentCode :
1382377
Title :
Effect of Wire Diameter and Addition of an Axial Magnetic Field on the Dynamics of Radial Wire Array 
-Pinches
Author :
Suzuki-Vidal, Francisco ; Lebedev, Sergey V. ; Bland, Simon N. ; Hall, Gareth N. ; Harvey-Thompson, Adam J. ; Chittenden, Jeremy P. ; Marocchino, Alberto ; Bott, Simon C. ; Palmer, James B A ; Ciardi, Andrea
Author_Institution :
Dept. of Phys., Imperial Coll. London, London, UK
Volume :
38
Issue :
4
fYear :
2010
fDate :
4/1/2010 12:00:00 AM
Firstpage :
581
Lastpage :
588
Abstract :
The operation of radial wire array Z-pinches driven by a 1-MA 250-ns current pulse was studied. Variation in the cathode diameter and wire diameter does not affect the overall plasma dynamics but controls the time of wire breakage and the time of pinch formation. The measured times of full wire ablation at the cathode were used to determine the ablation velocity (V abl), and the results give a scaling V abl ~ (wire diameter)-0.46. Experiments with added axial magnetic field show an increase in the pinched plasma diameter, possibly due to the compression of the axial magnetic flux by the imploding plasma.
Keywords :
Z pinch; explosions; plasma X-ray sources; plasma instability; plasma jets; plasma magnetohydrodynamics; plasma probes; plasma production; X-ray emission; ablation velocity; axial magnetic field; current 1 MA; full wire ablation; imploding plasma; magnetic flux; pinch formation; pinched plasma diameter; plasma dynamics; radial wire array Z-pinches; time 250 ns; wire breakage time; wire diameter; $Z$
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2009.2036730
Filename :
5382586
Link To Document :
