Study of the Internal Structure and Small-Scale Instabilities in the Dense<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>Pinch

Иванов, В. В.; Chittenden, J. P.; Altemara, S. D.; Niasse, N.; Hakel, P.; Mancini, Roberto; Papp, D.; Anderson, A.

doi:10.1103/physrevlett.107.165002

Cited by 22 publications

(35 citation statements)

References 25 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Formation of axial necks in the pinch due to the implosion inhomogeneity was observed in previous papers. 16,17,19,28,34,35 Figure 2 shows the dynamics of radiation from necks in an Al 4-ray 24-wire star array and a 10-wire planar load taken with the Au photocathode without filters, E > 50 eV, over a 50 ns range. The necks are seen as bright spots in the streak images.…”

Section: Resultsmentioning

confidence: 99%

“…Electron temperatures of micropinches of 0.3-3 keV were measured in different wire-array Z pinches. 4,[18][19][20] Continuum spectra of hot spots in the keV range may be a signature of a high plasma density. 16,17 Recently, axially resolved spectroscopy and K-shell power measurements were applied to stagnated Al, Cu, and Ti Z pinches on the Z machine.…”

Section: Introductionmentioning

confidence: 99%

“…The three-dimensional (3D) structure of the pinch depends on the initial configuration of the wire array. 19,20 Therefore, the dynamics and parameters of the plasma in wire-array bright spots may vary over a wide range. MHD simulation of hot spots in the wire array requires calculations with single micron accuracy, picosecond resolution, and appropriate radiation models.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10][11][12] The electron temperature in bright spots (micro-pinches, hot spots, plasma points) varies from 0.3 to 3 keV in different experiments and pinch configurations. 3,4,13,14,[18][19][20][21] Micro-pinches in Z-pinch plasmas are the source of enhanced x-ray radiation. They contribute to the energy balance, x-ray production, and neutron yield in Z pinches.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study of micro-pinches in wire-array Z pinches

et al. 2013

Self Cite

View full text Add to dashboard Cite

Bright and hot areas with a high plasma density and temperature are observed in all kinds of Z pinches. We studied bright radiating spots produced by micro-pinches in cylindrical and planar wire-arrays at the 1 MA Zebra pulsed power generator using an x-ray streak camera synchronized with laser diagnostics, x-ray time-gated pinhole camera, and spectroscopy. Hot spots with extremely dense and relatively hot plasma arise during the collapse of the micro-pinches. These hot spots radiate a continuum spectrum with energy >2.5 keV. Typical micro-pinches in Al wire arrays generate x-ray bursts with durations of 0.4-1 ns in the soft x-ray range and 0.1-0.4 ns in the keV range. UV two-frame shadowgraphy shows spatial correlation of hot spots with the collapse and explosion of micro-pinches. Micro-pinches typically occur at the necks of the Z pinch, but can demonstrate a variety of parameters and different dynamics. An analysis of x-ray streak images shows that micro-pinches can generate >20% of the x-ray energy in some types of wire-array Z pinches. V C 2013 AIP Publishing LLC. [http://dx.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of micro-pinches in wire-array Z pinches

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Ultraviolet (UV) laser diagnostics at the wavelength of 266 nm provide a flexible method to study dense Zpinch plasmas. The UV diagnostics show a strong advantage over diagnostics employed at the standard wavelength of 532 nm due to smaller absorption and less refraction at density gradients, allowing the probing laser to penetrate deeper into the dense plasma [7,8]. This also allows the Faraday rotation diagnostic to measure magnetic fields and study the current distribution in the trailing plasma of the stagnated Z pinch [9].…”

Section: Introductionmentioning

confidence: 97%

Visualization of the magnetic field and current path in Z-pinch and X-pinch plasmas

Anderson

Иванов

Papp

2015

High Energy Density Physics

Self Cite

View full text Add to dashboard Cite

a b s t r a c tLaser diagnostics at the wavelength of 266 nm allow investigation of wire array Z-pinches and X-pinches at the 1 MA pulse power generator. Faraday rotation diagnostics at 266 nm is applied to study MG magnetic fields in Z-pinch plasma. Faraday diagnostics can qualitatively visualize magnetic fields in dense plasma and give additional information about the current flow even if the plasma density cannot be reconstructed with interferometry. A comparison of images from the three-channel polarimeter shows strong localized magnetic fields, revealing the path for the electric current inside the plasma. Faraday images present current switched to the trailing plasma.

show abstract

Investigation of asymmetry of wire-array Z pinches at stagnation using a 4-channel laser diagnostic

Иванов

Anderson

2016

High Energy Density Physics

View full text Add to dashboard Cite

Asymmetry of wire-array Z-pinches at stagnation was investigated using four synchronized laser beams at the wavelength of 266 nm. These beams were spaced at 45° with respect to each other, allowing a full view of the pinch from four directions. The laser pulse duration was 0.2 ns, with a <0.1 ns temporal accuracy between the four channels. Strong asymmetry was found in Z pinches produced by implosion of asymmetrical wire array loads. Anisotropy of the wire-array Z pinch arises due to the asymmetric implosion and development of plasma instabilities. Understanding the three-dimension structure of Z-pinches is important for interpretation of data from x-ray and laser diagnostics.

show abstract

Study of the Internal Structure and Small-Scale Instabilities in the DenseZPinch

Cited by 22 publications

References 25 publications

Study of micro-pinches in wire-array Z pinches

Study of micro-pinches in wire-array Z pinches

Visualization of the magnetic field and current path in Z-pinch and X-pinch plasmas

Investigation of asymmetry of wire-array Z pinches at stagnation using a 4-channel laser diagnostic

Contact Info

Product

Resources

About