Publications
348 results found
Suzuki-Vidal F, Bocchi M, Lebedev SV, et al., 2012, Interaction of a supersonic, radiatively cooled plasma jet with an ambient medium, PHYSICS OF PLASMAS, Vol: 19, ISSN: 1070-664X
- Author Web Link
- Open Access Link
- Cite
- Citations: 26
Suzuki-Vidal F, Lebedev SV, Krishnan M, et al., 2012, Laboratory astrophysics experiments studying hydrodynamic and magnetically-driven plasma jets, 14th Latin American Workshop on Plasma Physics (LAWPP), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
- Author Web Link
- Cite
- Citations: 7
Ivanov VV, Hakel P, Mancini RC, et al., 2011, X-ray absorption spectroscopy for wire-array Z-pinches at the non-radiative stage, HIGH ENERGY DENSITY PHYSICS, Vol: 7, Pages: 383-390, ISSN: 1574-1818
- Author Web Link
- Cite
- Citations: 3
Suzuki-Vidal F, Lebedev SV, Bland SN, et al., 2011, Experimental Studies of Magnetically Driven Plasma Jets, Astrophysics and Space Science, Vol: 336, Pages: 41-46, ISSN: 1572-946X
We present experimental results on the formationof supersonic, radiatively cooled jets driven by pressuredue to the toroidal magnetic field generated by the 1.5 MA,250 ns current from the MAGPIE generator. The morphologyof the jet produced in the experiments is relevant toastrophysical jet scenarios in which a jet on the axis of amagnetic cavity is collimated by a toroidal magnetic fieldas it expands into the ambient medium. The jets in the experimentshave similar Mach number, plasma beta and coolingparameter to those in protostellar jets. Additionally theReynolds, magnetic Reynolds and Peclet numbers are muchlarger than unity, allowing the experiments to be scaled toastrophysical flows. The experimental configuration allowsfor the generation of episodic magnetic cavities, suggestingthat periodic fluctuations near the source may be responsiblefor some of the variability observed in astrophysical jets.Preliminary measurements of kinetic, magnetic and Poyntingenergy of the jets in our experiments are presented and discussed, together with estimates of their temperature andtrapped toroidal magnetic field.
Bocchi M, Chittenden JP, Ciardi A, et al., 2011, Numerical study of jets produced by conical wire arrays on the Magpie pulsed power generator, Astrophysics and Space Science, Vol: 336, Pages: 27-31, ISSN: 1572-946X
The aim of this work is to model the jets produced by conical wire arrays on the MAGPIE generator, and to design and test new setups to strengthen the link between laboratory and astrophysical jets. We performed the modelling with direct three-dimensional magneto-hydro-dynamic numerical simulations using the code GORGON. We applied our code to the typical MAGPIE setup and we successfully reproduced the experiments. We found that a minimum resolution of ∼100 μm is required to retrieve the unstable character of the jet. We investigated the effect of changing the number of wires and found that arrays with less wires produce more unstable jets, and that this effect has magnetic origin. Finally, we studied the behaviour of the conical array together with a conical shield on top of it to reduce the presence of unwanted low density plasma flows. The resulting jet is shorter and less dense.
Mazarakis MG, Deeney CE, Stygar WA, et al., 2011, Wire number dependence of the implosion dynamics, stagnation, and radiation output of tungsten wire arrays at Z driver, PHYSICS OF PLASMAS, Vol: 18, ISSN: 1070-664X
- Author Web Link
- Cite
- Citations: 7
Ampleford DJ, Bland SN, Lebedev SV, et al., 2011, Extreme-UV Self-Emission From Plasma-Focus Radial Wire Array, IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol: 39, Pages: 2420-2421, ISSN: 0093-3813
- Author Web Link
- Cite
- Citations: 1
Ivanov VV, Chittenden JP, Altemara SD, et al., 2011, Study of the Internal Structure and Small-Scale Instabilities in the Dense $Z$ Pinch, Phys. Rev. Lett., Vol: 107, Pages: 165002-165002
Ivanov VV, Hakel P, Mancini RC, et al., 2011, Measurement of the Ionization State and Electron Temperature of Plasma during the Ablation Stage of a Wire-Array Z Pinch Using Absorption Spectroscopy, PHYSICAL REVIEW LETTERS, Vol: 106, ISSN: 0031-9007
- Author Web Link
- Cite
- Citations: 7
Suzuki-Vidal F, Lebedev SV, Swadling G, et al., 2011, Interaction of a Supersonic Plasma Jet With an Argon Ambient Using Laser Interferometry, IEEE Transactions on Plasma Science, Vol: 39, Pages: 2830-2831
Highly supersonic radiatively cooled plasma jets are produced by introducing a 1-MA 250-ns current pulse from the MAGPIE generator into a radial foil. The setup allows for the introduction of a neutral gas above the foil, in order to study the jet-ambient interaction. The dynamics are characterized by the formation of several shock features, which are imaged using laser interferometry. This diagnostic also allows to measure the electron density of the plasma, and examples of such results are presented here.
Harvey-Thompson AJ, Lebedev SV, Burdiak G, et al., 2011, Suppression of the Ablation Phase in Wire Array Z Pinches Using a Tailored Current Prepulse, PHYSICAL REVIEW LETTERS, Vol: 106, ISSN: 0031-9007
- Author Web Link
- Open Access Link
- Cite
- Citations: 40
Sinars DB, Slutz SA, Herrmann MC, et al., 2011, Measurements of magneto-Rayleigh-Taylor instability growth during the implosion of initially solid metal liners, 52nd Annual Meeting of the APS Division of Plasma Physics, Publisher: AIP Publishing, ISSN: 1070-664X
- Author Web Link
- Cite
- Citations: 91
Appelbe BD, Chittenden J, 2011, The production spectrum in fusion plasmas, Plasma Physics and Controlled Fusion, Vol: 53, ISSN: 0741-3335
Significant broadening of the energy spectrum of the products of nuclear reactions occurs in fusion plasmas. We provide a method for calculating the shape of this production spectrum for arbitrary plasma distribution functions. The method is exact and can be used for both isotropic and anisotropic distributions. We derive expressions for Maxwellian ( both stationary and moving with a bulk fluid velocity), bi-Maxwellian and beam-target plasmas. The neutron spectrum produced by the D+D -> He(3) +n reaction is studied as an example. It is shown that the neutron spectrum produced from a Maxwellian plasma becomes asymmetric at high plasma temperatures with a long high-energy tail. The effect of bulk fluid velocity on the neutron spectrum is shown to be significant in some cases. In particular, the spectrum produced by an imploding shell has a much greater FWHM than the spectrum obtained from a stationary plasma. The spectrum produced by a beam-target interaction shows significant anisotropy in the high-energy tail as the viewing angle varies from perpendicular to parallel to the beam direction.
Lebedev SV, Suzuki-Vidal F, Ciardi A, et al., 2011, Laboratory simulations of astrophysical jets, 274th Symposium of the International-Astronomical-Union on Advances in Plasma Astrophysics, Publisher: CAMBRIDGE UNIV PRESS, Pages: 26-35, ISSN: 1743-9213
Haas D, Bott S, Kim J, et al., 2011, Supersonic jet formation and propagation in x-pinches, Astrophysics and Space Science, Vol: 336, Pages: 33-40-33-40, ISSN: 0004-640X
Bocchi M, Chittenden JP, Ciardi A, et al., 2011, Numerical study of jets produced by conical wire arrays on the Magpie pulsed power generator, 274th Symposium of the International-Astronomical-Union on Advances in Plasma Astrophysics, Publisher: CAMBRIDGE UNIV PRESS, Pages: 429-432, ISSN: 1743-9213
Suzuki-Vidal F, Lebedev SV, Bland SN, et al., 2010, Generation of episodic magnetically driven plasma jets in a radial foil Z-pinch, PHYSICS OF PLASMAS, Vol: 17, ISSN: 1070-664X
- Author Web Link
- Open Access Link
- Cite
- Citations: 37
Ivanov VV, Astanovitskiy AL, Papp D, et al., 2010, Study of transparent and nontransparent regimes of implosion in star wire arrays, PHYSICS OF PLASMAS, Vol: 17, ISSN: 1070-664X
- Author Web Link
- Cite
- Citations: 11
Jennings CA, Cuneo ME, Waisman EM, et al., 2010, Simulations of the implosion and stagnation of compact wire arrays, PHYSICS OF PLASMAS, Vol: 17, ISSN: 1070-664X
- Author Web Link
- Cite
- Citations: 52
Symes DR, Hohenberger M, Lazarus J, et al., 2010, Investigations of laser-driven radiative blast waves in clustered gases, 2nd International Conference on High Energy Density Physics, Publisher: ELSEVIER SCIENCE BV, Pages: 274-279, ISSN: 1574-1818
- Author Web Link
- Cite
- Citations: 21
Coverdale CA, Jones B, Ampleford DJ, et al., 2010, K-shell X-ray sources at the <i>Z</i> Accelerator, 2nd International Conference on High Energy Density Physics, Publisher: ELSEVIER, Pages: 143-152, ISSN: 1574-1818
- Author Web Link
- Cite
- Citations: 42
Ampleford DJ, Jennings CA, Hall GN, et al., 2010, Bow shocks in ablated plasma streams for nested wire array z-pinches: A laboratory astrophysics testbed for radiatively cooled shocks, 51st Annual Meeting of the Division-of-Plasma-Physics of the American-Physics-Society, Publisher: AIP Publishing, ISSN: 1070-664X
- Author Web Link
- Cite
- Citations: 15
Coverdale CA, LePell PD, Deeney C, et al., 2010, Investigations of Azimuthal Uniformity, Radial Extrapolation, and View-Factor Corrections for Yield Measurements of K-Shell X-Ray Sources at the Z Accelerator, 51st Annual Meeting of the Division-of-Plasma-Physics of the American-Physics-Society, Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, Pages: 589-597, ISSN: 0093-3813
Suzuki-Vidal F, Lebedev SV, Bland SN, et al., 2010, Effect of Wire Diameter and Addition of an Axial Magnetic Field on the Dynamics of Radial Wire Array <i>Z</i>-Pinches, 51st American-Physics-Society-Division-of-Plasma-Physics Meeting, Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, Pages: 581-588, ISSN: 0093-3813
- Author Web Link
- Cite
- Citations: 21
Jennings CA, Chittenden JP, Cuneo ME, et al., 2010, Circuit Model for Driving Three-Dimensional Resistive MHD Wire Array <i>Z</i>-Pinch Calculations, 51st Annual Meeting of the Division-of-Plasma-Physics of the American-Physics-Society, Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, Pages: 529-539, ISSN: 0093-3813
- Author Web Link
- Cite
- Citations: 43
Bott SC, Chittenden JP, Coverdale CA, et al., 2010, Special Issue on <i>Z</i>-Pinch Plasmas, IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol: 38, Pages: 526-528, ISSN: 0093-3813
- Author Web Link
- Cite
- Citations: 1
Kim D-K, Chittenden JP, Lebedev SV, et al., 2010, Magnetohydrodynamic Simulation of Tungsten Wire in Wire-Array Z Pinch, CONTRIBUTIONS TO PLASMA PHYSICS, Vol: 50, Pages: 115-120, ISSN: 0863-1042
- Author Web Link
- Cite
- Citations: 3
Suzuki-Vidal F, Lebedev SV, Ciardi A, et al., 2010, Magnetically Driven Supersonic Plasma Jets in High Energy Density Experiments, International Symposium Plasmas in the Laboratory and in the Universe: Interactions, Patterns and Turbulence, Publisher: AMER INST PHYSICS, Pages: 266-+, ISSN: 0094-243X
Bott SC, Collins IV G, Beg FN, et al., 2009, Investigations of the ablation phase of low wire number arrays at 200 kA, ISSN: 0730-9244
Coverdale CA, Deeney C, Jones B, et al., 2009, Ablation dynamics and stagnation physics of copper wire array Z-pinch implosions at 20 MA, ISSN: 0730-9244
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.