Publications
224 results found
Bott SC, Lebedev SV, Ampleford DJ, et al., 2006, Dynamics of cylindrically converging precursor plasma flow in wire-array <i>Z</i>-pinch experiments, PHYSICAL REVIEW E, Vol: 74, ISSN: 1539-3755
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- Citations: 61
Ivanov VV, Sotnikov VI, Sarkisov GS, et al., 2006, Dynamics of mass transport and magnetic fields in low-wire-number-array <i>Z</i> pinches, PHYSICAL REVIEW LETTERS, Vol: 97, ISSN: 0031-9007
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- Citations: 41
Green JS, Bland SN, Collett M, et al., 2006, Effect of wire number on x-pinch discharges, APPLIED PHYSICS LETTERS, Vol: 88, ISSN: 0003-6951
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- Citations: 12
Jones B, Garasi CJ, Ampleford DJ, et al., 2006, Measurement and modeling of the implosion of wire arrays with seeded instabilities, ISSN: 1070-664X
In order to study wire array Z-pinch instabilities, perturbations have been seeded by etching 15 μm diameter aluminum wires to introduce 20% modulations in radius with a controlled axial wavelength. These perturbations seed additional imploding structures that are studied experimentally on the 1 MA, 250 ns MAGPIE generator [S. V. Lebedev, Plasma Phys. Control. Fusion 47, A91 (2005)] and with three-dimensional magnetohydrodynamic calculations using the ALEGRA-HEDP [A. C. Robinson and C. J. Garasi, Comput. Phys. Commun. 164, 408 (2004)] and GORGON [J. P. Chittenden, Plasma Phys. Control. Fusion 46, B457 (2004)] codes. Simulations indicate that current path nonuniformity at discontinuities in the wire radius result in perturbation-induced magnetic bubble formation. Imploding bubbles originating from discontinuities are observed experimentally, and their collision on axis determines the start of the main x-ray pulse rise. These mechanisms likely govern dynamics of standard wire array Z pinches, and tailoring the profile of imploding mass may allow x-ray pulse shaping for inertial confinement fusion applications. © 2006 American Institute of Physics.
Jones B, Garasi CJ, Ampleford DJ, et al., 2006, Measurement and modeling of the implosion of wire arrays with seeded instabilities, 47th Annual Meeting of the Division of Plasma Physics of the American-Physical-Society, Publisher: AIP Publishing, ISSN: 1070-664X
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- Citations: 13
Lebedev SV, Ampleford DJ, Bland SN, et al., 2006, Recent wire array experiments on the MAGPIE generator, Dense Z-Pinches, Vol: 808, Pages: 69-72, ISSN: 0094-243X
Jennings CA, Chittenden JP, Ciardi A, et al., 2006, 3D resistive, radiative MHD modeling of z-pinches, Dense Z-Pinches, Vol: 808, Pages: 57-60, ISSN: 0094-243X
Ampleford DJ, Lebedev SV, Chittenden JP, et al., 2006, Implosion dynamics in conical wire array Z-pinches, Dense Z-Pinches, Vol: 808, Pages: 33-36, ISSN: 0094-243X
Jones B, Deeney C, McKenney JL, et al., 2006, Seeded perturbations in wire array z-pinches, 6th International Conference on Dense Z-Pinches, Publisher: AMER INST PHYSICS, Pages: 61-+, ISSN: 0094-243X
Hall GN, Pikuz SA, Shelkovenko TA, et al., 2006, Structure of stagnated plasma in aluminium wire array Z-pinches, Dense Z-Pinches, Vol: 808, Pages: 53-56, ISSN: 0094-243X
Lebedev SV, Ampleford DJ, Bland SN, et al., 2006, Recent wire array experiments on the MAGPIE generator, Dense Z-Pinches, Vol: 808, Pages: 69-72, ISSN: 0094-243X
Bland SN, Lebedev SV, Hall GN, et al., 2006, The effect of wire initiation on array dynamics, Dense Z-Pinches, Vol: 808, Pages: 9-14, ISSN: 0094-243X
Hall GN, Pikuz SA, Shelkovenko TA, et al., 2006, Structure of stagnated plasma in aluminium wire array Z-pinches, Dense Z-Pinches, Vol: 808, Pages: 53-56, ISSN: 0094-243X
Hall GN, Pikuz SA, Shelkovenko TA, et al., 2006, Structure of stagnated plasma in aluminium wire array Z-pinches, Dense Z-Pinches, Vol: 808, Pages: 53-56, ISSN: 0094-243X
Lebedev SV, Ciardi A, Ampleford D, et al., 2006, Laboratory experiments with supersonic radiatively cooled jets: Jet deflection via crosswinds and magnetic tower outflows, Superstrong Fields in Plasmas, Vol: 827, Pages: 329-340, ISSN: 0094-243X
Bland SN, Lebedev SV, Hall GN, et al., 2006, The effect of wire initiation on array dynamics, Dense Z-Pinches, Vol: 808, Pages: 9-14, ISSN: 0094-243X
Bott SC, Lebedev SV, Bland SN, et al., 2006, Plasma ablation and precursor column formation in wire-array Z-pinches, Dense Z-Pinches, Vol: 808, Pages: 37-40, ISSN: 0094-243X
Lebedev SV, Ciardi A, Ampleford D, et al., 2006, Laboratory experiments with supersonic radiatively cooled jets: Jet deflection via crosswinds and magnetic tower outflows, Superstrong Fields in Plasmas, Vol: 827, Pages: 329-340, ISSN: 0094-243X
Calamy H, Hamann F, Lassalle F, et al., 2006, Wire array Z-pinches on SPHINX machine: Experimental results and relevant points of microsecond implosion physics, 6th International Conference on Dense Z-Pinches, Publisher: AMER INST PHYSICS, Pages: 15-+, ISSN: 0094-243X
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- Citations: 5
Bott SC, Lebedev SV, Bland SN, et al., 2006, Plasma ablation and precursor column formation in wire-array Z-pinches, Dense Z-Pinches, Vol: 808, Pages: 37-40, ISSN: 0094-243X
Lebedev SV, Ciardi A, Ampleford DJ, et al., 2005, Production of radiatively cooled hypersonic plasma jets and links to astrophysical jets, 32nd European-Physical-Society Conference on Plasma Physics, Publisher: IOP PUBLISHING LTD, Pages: B465-B479, ISSN: 0741-3335
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- Citations: 54
Jones B, Deeney C, McKenney JL, et al., 2005, Study of three-dimensional structure in wire-array <i>z</i> pinches by controlled seeding of axial modulations in wire radius -: art. no. 225001, PHYSICAL REVIEW LETTERS, Vol: 95, ISSN: 0031-9007
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- Citations: 40
Bland SN, Lebedev SV, Chittenden JP, et al., 2005, Effect of radial-electric-field polarity on wire-array Z-pinch dynamics -: art. no. 135001, PHYSICAL REVIEW LETTERS, Vol: 95, ISSN: 0031-9007
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- Citations: 25
Lebedev SV, Ciardi A, Ampleford DJ, et al., 2005, Magnetic tower outflows from a radial wire array Z-pinch, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 361, Pages: 97-108, ISSN: 0035-8711
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- Citations: 131
Ciardi A, Lebedev SV, Chittenden JP, et al., 2005, Modeling magnetic tower jets in the laboratory, 5th International Conference on High Energy Density Laboratory Astrophysics, Publisher: SPRINGER, Pages: 277-286, ISSN: 0004-640X
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- Citations: 15
Ampleford DJ, Lebedev SV, Ciardi A, et al., 2005, Formation of working surfaces in radiatively cooled laboratory jets, 5th International Conference on High Energy Density Laboratory Astrophysics, Publisher: SPRINGER, Pages: 241-246, ISSN: 0004-640X
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- Citations: 30
Frank A, Blackman EG, Cunningham A, et al., 2005, A HED laboratory astrophysics testbed comes of age: JET deflection via cross winds, 5th International Conference on High Energy Density Laboratory Astrophysics, Publisher: SPRINGER, Pages: 107-114, ISSN: 0004-640X
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- Citations: 5
Lebedev SV, Ampleford DJ, Bland SN, et al., 2005, Physics of wire array Z-pinch implosions: experiments at Imperial College, 12th International Congress on Plasma Physics (ICPP2004), Publisher: IOP PUBLISHING LTD, Pages: A91-A108, ISSN: 0741-3335
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- Citations: 89
Lebedev SV, Ampleford DJ, Bland SN, et al., 2004, Plasma Dynamics in Radial Wire Array Z-Pinches, ISSN: 0730-9244
We describe experiments on the MAGPIE facility (1MA, 250ns) with radial wire array z-pinches, in which the wires form a wheel-spoke configuration. Variation of the global magnetic field and the corresponding J×B force along the wires in this configuration allows studying an effect of the global magnetic field on the ablation rate of the wires. The knowledge of the scaling of the ablation rate is important for interpretation of the dynamics of wire array z-pinch plasma radiation sources. The parameters of the coronal plasma, which is pushed away from the wire cores by the J×B force, were measured using laser interferometry, X-ray and XUV imaging. The complete ablation of the wires near the inner electrode, where the ablation rate is the highest, triggers an axial acceleration of the plasma. This leads to formation of plasma configuration similar to a plasma focus and generation of the X-ray pulse. The results of the experiments with tungsten and aluminium radial wire arrays will be presented.
Lebedev SV, Ampleford D, Ciardi A, et al., 2004, Jet deflection via crosswinds: Laboratory astrophysical studies, ASTROPHYSICAL JOURNAL, Vol: 616, Pages: 988-997, ISSN: 0004-637X
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- Citations: 74
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