Investigation of Magnetic Fields in 1-MA Wire Arrays and$X$-Pinches

Иванов, В. В.; Sarkisov, G. S.; Laca, P.J.; Sotnikov, V. I.; Kantsyrev, V. L.; Jones, B.; Coverdale, C. A.; LePell, P.D.; Deeney, C.; Struve, K.W.; Astanovitskiy, A. L.; Fedin, D.; Galloudec, B. Le; Nalajala, V.; Shrestha, I.; Cowan, T. E.

doi:10.1109/tps.2006.877693

Cited by 28 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, we report mainly the results of shadowgraphy and interferometry applications. Main results on investigation of current distribution and magnetic field in Z-pinch plasma will be published in [27].…”

Section: B Diagnosticsmentioning

confidence: 99%

Radiation properties and implosion dynamics of planar and cylindrical wire arrays, asymmetric and symmetric, uniform and combined X-pinches on the UNR 1-MA zebra generator

Kantsyrev

Safronova

Fedin

et al. 2006

IEEE Trans. Plasma Sci.

Self Cite

View full text Add to dashboard Cite

In the following experiments, we studied implosions of different wire arrays and X-pinches produced on the 1-MA Zebra generator at the University of Nevada, Reno. Diagnostics included both spatially-resolved and time-gated X-ray imaging and spectroscopy, and laser probing. In particular, we compared planar wire arrays, to which little energy could be coupled via the conventional magnetic-to-kinetic conversion mechanism, to cylindrical wire arrays of comparable dimensions and mass. The planar wire arrays were shown to radiate much higher peak power and more energy in subkiloelectronvolt and kiloelectronvolt spectral ranges than cylindrical wire arrays. We tested the theoretical conjecture that enhanced resistivity due to the small-scale inhomogeneity of wire-array plasmas has a major effect on dynamics, energy coupling and radiation performance of wire-array Z-pinches. The study of Al, Alumel, and W cylindrical wire arrays shows a wide variety of characteristic behaviors in plasma implosions discussed hereinafter. Additional experimental results for symmetric and asymmetric, uniform stainless steel, Cu, Mo, combined Al/Mo, Mo/Al, Al/W, W/Al, and Mo/W X-pinches are also presented. New data for the total radiation yield are obtained. The planar structures of X-pinch plasma and the corresponding electron beam was observed for most of X-pinches. The generation of hot spots along original wires positions-cooler than those from the cross-wire region-and arc structures with hot spots between

show abstract

Section: B Diagnosticsmentioning

confidence: 99%

Radiation properties and implosion dynamics of planar and cylindrical wire arrays, asymmetric and symmetric, uniform and combined X-pinches on the UNR 1-MA zebra generator

Kantsyrev

Safronova

Fedin

et al. 2006

IEEE Trans. Plasma Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Faraday rotation diagnostics can be used to measure the magnetic field strength of the imploding wire array zpinch [9]. The plane of polarization for a polarized laser probe undergoes a rotation as it passes through a magnetic field in a plasma.…”

Section: B Uv Faraday Rotation Diagnosticsmentioning

confidence: 99%

Study of ablation and implosion stages of 1 MA wire array z-pinches using UV laser diagnostics

Anderson

Иванов

Talbot

et al. 2013

2013 19th IEEE Pulsed Power Conference (PPC)

View full text Add to dashboard Cite

The ablation and implosion stages of wire array zpinches were studied using UV diagnostics at the wavelength of 266 nm. Experiments were conducted using Al cylindrical, star, and planar wire arrays at the 1 MA Zebra pulsed-power generator at UNR. UV interferometry allows direct study of electron plasma density >10 20 cm -3 . We measured the density structure and dynamics in the ablating wires with 2-fram UV interferometry.Faraday rotation diagnostics at the wavelength of 266 nm were developed and applied to the ablation and implosion stages in wire arrays. Comparison of Faraday images with shadowgrams and interferograms allows for the measurement of magnetic fields to reconstruct the current in the imploding plasma and nonimploded material in wire arrays.

show abstract

“…The formation of the z-pinch, trailing mass, and the development of m = 0, one instabilities were investigated in the stagnation phase [15]- [17]. Shadowgraphy, interferometry, schlieren, and Faraday rotation diagnostics based on the short-pulse laser and charge-coupled device (CCD) cameras were developed at the Zebra generator and provided data about distribution of plasma and magnetic fields in wire arrays [18]. Multiframe laser diagnostics can clarify the implosion dynamics of fast moving plasma in wire arrays [15], [17], [18].…”

Section: Development Of Uv Laser Probingmentioning

confidence: 99%

“…Shadowgraphy, interferometry, schlieren, and Faraday rotation diagnostics based on the short-pulse laser and charge-coupled device (CCD) cameras were developed at the Zebra generator and provided data about distribution of plasma and magnetic fields in wire arrays [18]. Multiframe laser diagnostics can clarify the implosion dynamics of fast moving plasma in wire arrays [15], [17], [18]. Unfortunately, regular laser diagnostics at 532 nm meet significant issues when applied to 1-MA z-pinches in the end of implosion, at the stagnation phase, and even at the ablation stage in compact wire arrays [19].…”

Section: Development Of Uv Laser Probingmentioning

confidence: 99%

Development of UV Laser Probing Diagnostics for 1-MA Z-Pinches

Иванов

Altemara

Astanovitskiy

et al. 2010

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Laser probing diagnostics at the wavelength of 266 nm were developed for investigation of the 1-MA z-pinch plasmas. The absorption and refraction in plasma are significantly smaller at 266 nm than at the regular wavelength of 532 nm. These features allow observation of fine details in the z-pinch plasma at the ablation, implosion, and stagnation phases. Two-color shadowgraphy at 532/266 nm presents a structure of ablating wires and implosion bubbles in wire arrays. Plasma distribution and dynamics in compact cylindrical, star, and planar wire arrays can be studied at the wavelength of 266 nm. An electron density N e > 5 · 10 19 cm −3 was reconstructed with interferometry at 266 nm in the stagnated z-pinch. Further development of laser probing diagnostics of the z-pinch plasmas is discussed.

show abstract

Investigation of Magnetic Fields in 1-MA Wire Arrays and$X$-Pinches

Cited by 28 publications

References 25 publications

Radiation properties and implosion dynamics of planar and cylindrical wire arrays, asymmetric and symmetric, uniform and combined X-pinches on the UNR 1-MA zebra generator

Radiation properties and implosion dynamics of planar and cylindrical wire arrays, asymmetric and symmetric, uniform and combined X-pinches on the UNR 1-MA zebra generator

Study of ablation and implosion stages of 1 MA wire array z-pinches using UV laser diagnostics

Development of UV Laser Probing Diagnostics for 1-MA Z-Pinches

Contact Info

Product

Resources

About