Enhanced<i>Z</i>pinch using an externally applied magnetic field to stabilize the implosion of an aluminum plasma jet onto a coaxial wire

Edison, N. S.; Etlicher, B.; Chuvatin, A. S.; Attelan, S.; Aliaga, R.

doi:10.1103/physreve.48.3893

Cited by 17 publications

(3 citation statements)

References 7 publications

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“…The transient electromagnetic field plays very important roles in the research on the high-energy-density matter, driven by intense laser, ion, and Z-pinch equipment [1][2][3][4][5][6]. The research of electromagnetic field in plasma is related to accelerator physics, high-energy density physics, inertial confinement fusion, and astrophysics phenomena [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast High-Energy Electron Radiography Application in Magnetic Field Delicate Structure Measurement

Xiao

Zhang

et al. 2021

Laser Part. Beams

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Transient electromagnetic field plays very important roles in the evolution of high-energy-density matter or laser plasma. Now, a new design is proposed in this paper to diagnose the transient magnetic field, using relativistic electron bunch as a probe based on high-energy electron radiography. And based on this scheme, the continuous distribution of magnetic strength field can be snapshotted. For 1 mm thick quadrupole magnet model measured by 50 MeV probe electron beams, the simulation result indicates that this diagnosis has spatial resolution better than 4 microns and high measurement accuracy for strong magnetic strength and high magnetic gradient field no matter whether the magnetic interaction is focusing or defocusing for the range from -510 T ∗ μm to 510 T ∗ μm.

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Section: Introductionmentioning

confidence: 99%

Ultrafast High-Energy Electron Radiography Application in Magnetic Field Delicate Structure Measurement

Xiao

Zhang

et al. 2021

Laser Part. Beams

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“…In addition, a several-fold reduction in the X-ray pulse risetime was measured, with a dramatic shift in the radiated X-ray spectrum to higher energy, from 1n7 keV (the K-edge characteristic of the outer aluminum liner) to the range of about 3-5 keV, demonstrating the existence of a much hotter plasma on axis. Field-stabilized staged Z-pinch experiments were also conducted with a somewhat lower initial axial magnetic field Edison et al 1993). The data show a several-fold improvement in the Xray yield for small values of the axial field (approximately 50 G), which is attributed to improved stability.…”

Section: Introductionmentioning

confidence: 99%

Staged pinch for controlled thermonuclear fusion

et al. 1997

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Staged pinch implosions provide a means to couple energy to a small-diameter fibre on an extremely fast time scale, circumventing the limitations of conventional pinches. In this scheme the generator current initially traverses an intermediate hollow plasma shell, which compresses onto the fibre placed coaxially and transfers the current to the fibre with a significantly reduced risetime. The results are impressive, since the delivered peak power is increased by several orders of magnitude, the coupling efficiency improves, and the most dangerous plasma instabilities that commonly plague high-density/high-temperature pinches are eliminated. This technique can be fielded on both fast and slow generators (i.e. tens of nanoseconds to microseconds), making it feasible to extend the concept to a wide range of presently assembled systems. Staging may therefore present a dramatically new means of pulsed-energy conversion, which could find many applications. In addressing the requirements for thermonuclear fusion in a staged Z pinch, our preliminary calculations based on zero-D models suggest the potential for a significant thermonuclear burn with generator currents of the order of a few megaamperes and one microsecond risetime. Studies are actively underway at various places around the world (England, France, Germany and Russia) as well as in the USA (UCI/UCR) to investigate different aspects of staged pinching and its applications, particularly those leading to controlled thermonuclear fusion.

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“…It is also evident from the graphs that for thick gas puffs, L ^ 0 1 , the curves for R, a, n and T converge to the same curve corresponding to the time around 44-2 ns, thus obviating the necessity of increasing L beyond 0-1. It has been observed experimentally (Edison et al 1993) that the Z-pinch plasma transfers its energy to the fibre at the time when the compression peaks. However, the earlier model of a thin-shell gas-puff (Rahman et al 1989) have shown that the imploding Z-pinch plasma approaches minimum radius after the current peaks (i.e.…”

Section: Dynamic Model Of a Staged Pinchmentioning

confidence: 99%

Fusion conditions in a finite-thickness gas-puff staged Z-pinch

et al. 1994

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We investigate the implosion of a dense τ-pinch plasma driven by an annular finite-thickness gas-puff Z-pinch. The imploding Z-pinch traps an axial magnetic field Bz, compressing it to large values in an extremely short time. The temporal variation of Bz then induces an azimuthal τ current on the surface of a fibre placed on the axis, with a rise time an order of magnitude shorter than the rise time of the Z-pinch current. Our numerical results demonstrate that, for a thick gas-puff layer, maximum compression occurs before the current peaks.We also find that at peak compression, fuel densities of the order of 1025 cm-3 and temperatures above 10 keV can be achieved on a time scale of the order of 0.1 ns. Thus a Lawson parameter nτ ≈ 1014 s cm-3 for a DT fibre becomes achievable. The snowplough effect in the Z-pinch exercises a stabilization effect on the growth of sausage and Rayleigh—Taylor instabilities. In the limit of a very thin gas-puff layer, previous results are fully recovered.

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EnhancedZpinch using an externally applied magnetic field to stabilize the implosion of an aluminum plasma jet onto a coaxial wire

Cited by 17 publications

References 7 publications

Ultrafast High-Energy Electron Radiography Application in Magnetic Field Delicate Structure Measurement

Ultrafast High-Energy Electron Radiography Application in Magnetic Field Delicate Structure Measurement

Staged pinch for controlled thermonuclear fusion

Fusion conditions in a finite-thickness gas-puff staged Z-pinch

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