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 Vabl ∼ (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. © 2010 IEEE.
Effect of wire diameter and addition of an axial magnetic field on the dynamics of radial wire array Z-pinches / Francisco Suzuki, Vidal; Sergey V., Lebedev; Simon N., Bland; Gareth N., Hall; Adam J., Harvey Thompson; Jeremy P., Chittenden; Marocchino, Alberto; Simon C., Bott; J. B. A., Palmer; Andrea, Ciardi. - In: IEEE TRANSACTIONS ON PLASMA SCIENCE. - ISSN 0093-3813. - STAMPA. - 38:4 PART 1(2010), pp. 581-588. [10.1109/tps.2009.2036730]
Effect of wire diameter and addition of an axial magnetic field on the dynamics of radial wire array Z-pinches
MAROCCHINO, ALBERTO;
2010
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 Vabl ∼ (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. © 2010 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
