Effect of Wire Diameter and Addition of an Axial Magnetic Field on the Dynamics of Radial Wire Array $Z$-Pinches

Suzuki-Vidal, F.; Lebedev, S. V.; Bland, S. N.; Hall, G. N.; Harvey‐Thompson, A. J.; Chittenden, J. P.; Marocchino, A.; Bott, S. C.; Palmer, J. B. A.; Ciardi, A.

doi:10.1109/tps.2009.2036730

Cited by 27 publications

(11 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The inferred position of the ions is consistent with the location of the unstable, detached jet that develops on the axis of the cavity, which is shown from a timeresolved, dark-field Schlieren results presented in the right hand side of figure 6(b). The pinching and subsequent development of a kink-type MHD instability in the jet has been reported in previous experiments with radial wire arrays in Lebedev et al (2005), Suzuki-Vidal et al (2010b) and in radial foil Z-pinches, in which the wires are replaced by a continuous metallic foil ( Suzuki-Vidal et al 2007, Ciardi et al 2009, Gourdain et al 2009, 2013. The development of a kink instability in the latter leads to the formation of strong, tangled magnetic fields as studied from numerical simulations of radial foils Z-pinches using the code GORGON (Ciardi et al 2009).…”

Section: Fly-eye Camera and Magnetic Spectrometersupporting

confidence: 62%

“…The toroidal magnetic field reaches ∼100 T at the electrode radius and decreases inversely proportional to the radial distance from the axis. The formation of magnetic-tower jets in radial wire arrays has been studied in detail both experimentally (Lebedev et al 2005, Suzuki-Vidal et al 2010b and numerically (e.g. Ciardi et al 2007) and are depicted schematically in figures 1(b)-(d).…”

Section: Magnetic Tower-jet Formation Using Radial Wire Arraysmentioning

confidence: 99%

See 1 more Smart Citation

Observation of energetic protons trapped in laboratory magnetic-tower jets

et al. 2013

View full text Add to dashboard Cite

Preliminary results of the self-emission of charged particles from magnetically driven plasma jets has been investigated. The jets were launched and driven by a toroidal magnetic field generated by introducing a ∼1.4 MA, 250 ns electrical current pulse from the MAGPIE generator into a radial wire array. This configuration has shown to reproduce some aspects of the astrophysical magnetic-tower jet launching model, in which a jet is collimated by a toroidal magnetic field inside a magnetic cavity. The emission of ions and protons from the plasma was recorded onto Columbia Resin 39 plates using timeintegrated pinhole cameras. In addition a fly-eye camera, an array of 25-496 cylindrical apertures allowed estimating the location of the ion emitting source. The results show the ion emission comes from both the jet and its surrounding magnetic cavity, with the emission extending to a height of at least ∼9 cm from the initial position of the wires. The emission of ions is consistent with the

show abstract

Section: Fly-eye Camera and Magnetic Spectrometersupporting

confidence: 62%

Section: Magnetic Tower-jet Formation Using Radial Wire Arraysmentioning

confidence: 99%

Observation of energetic protons trapped in laboratory magnetic-tower jets

et al. 2013

View full text Add to dashboard Cite

show abstract

“…This process is similar to the formation of radiatively cooled jets in conical wire array Z-pinches and during early stages of radial wire array Z-pinches. 18,[30][31][32][33][34][35] The first significant difference of this setup from our previous experiments 11 is the use of thicker foils and a cathode with a larger diameter. The corresponding increase of the foil mass and the decrease of the magnetic field pressure acting on the foil at the cathode radius allow to suppress the formation of magnetically dominated jets, studied in previous experiments.…”

Section: Experimental Setup Diagnostics and Numerical Setupmentioning

confidence: 91%

Interaction of a supersonic, radiatively cooled plasma jet with an ambient medium

et al. 2012

View full text Add to dashboard Cite

An experimental investigation into the interaction of a supersonic, radiatively cooled plasma jet with argon gas is presented. The jet is formed by ablation of an aluminum foil driven by a 1.4 MA, 250 ns current pulse in a radial foil Z-pinch configuration. The outflow consists of a supersonic (Mach number ∼3–5), dense (ion density ni ∼ 1018 cm−3), highly collimated (half-opening angle ∼2°−5°) jet surrounded by a lower density halo plasma moving with the same axial velocity as the jet. The addition of argon above the foil leads to the formation of a shock driven by the ablation of halo plasma, together with a bow-shock driven by the dense jet. Experimental data with and without the presence of argon are compared with three-dimensional, magneto-hydrodynamic simulations using the GORGON code.

show abstract

“…This assumption is based on the motion of different features along the jet, as seen also in the jets from single-episode magnetic cavities in radial wire arrays (Suzuki-Vidal et al 2010). The axial tip velocity of the first cavity was measured from time-resolved XUV emission images, resulting in V Ztip ≈ 128 km/s.…”

Section: Kinetic Energymentioning

confidence: 99%

Experimental Studies of Magnetically Driven Plasma Jets

Suzuki-Vidal

Lebedev

Bland

et al. 2010

Astrophys Space Sci

View full text Add to dashboard Cite

We present experimental results on the formation of supersonic, radiatively cooled jets driven by pressure due to the toroidal magnetic field generated by the 1.5 MA, 250 ns current from the MAGPIE generator. The morphology of the jet produced in the experiments is relevant to astrophysical jet scenarios in which a jet on the axis of a magnetic cavity is collimated by a toroidal magnetic field as it expands into the ambient medium. The jets in the experiments have similar Mach number, plasma beta and cooling parameter to those in protostellar jets. Additionally the Reynolds, magnetic Reynolds and Peclet numbers are much larger than unity, allowing the experiments to be scaled to astrophysical flows. The experimental configuration allows for the generation of episodic magnetic cavities, suggesting that periodic fluctuations near the source may be responsible for some of the variability observed in astrophysical jets. Preliminary measurements of kinetic, magnetic and Poynting energy of the jets in our experiments are presented and F. Suzuki-Vidal ( ) · S.V. Lebedev · S.N. Bland · G.N. Hall ·

show abstract

Effect of Wire Diameter and Addition of an Axial Magnetic Field on the Dynamics of Radial Wire Array $Z$-Pinches

Cited by 27 publications

References 16 publications

Observation of energetic protons trapped in laboratory magnetic-tower jets

Observation of energetic protons trapped in laboratory magnetic-tower jets

Interaction of a supersonic, radiatively cooled plasma jet with an ambient medium

Experimental Studies of Magnetically Driven Plasma Jets

Contact Info

Product

Resources

About