Self-Generated Plasma Rotation in a Z-Pinch Implosion with Preembedded Axial Magnetic Field

Cvejić, M.; Mikitchuk, D.; Kroupp, E.; Doron, R.; Sharma, Prashant; Maron, Y.; Velikovich, A. L.; Fruchtman, A.; Ochs, Ian E.; Kolmes, Elijah; Fisch, Nathaniel J.

doi:10.1103/physrevlett.128.015001

Cited by 13 publications

(2 citation statements)

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“…Generally, two primary methods were used to apply an axial magnetic field. The first method involves using a prolonged electrical pulse and Helmholtz coil to generate a quasi-steady magnetic field [23][24][25]. This method requires a larger Helmholtz coil to further improve the magnetic-field strength and duration, which increases the load inductance and reduces the driving capability of the generator.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, highresolution spectroscopic measurements were used to diagnose self-generated plasma rotation during the implosion of a gaspuff Z-pinch with a uniform axial magnetic field. The direction of azimuthal plasma motion depends on the direction of the applied axial magnetic field [24]. Although previous studies have primarily focused on the magnetic field stabilization of Z-pinch plasma, there has been a lack of simultaneous studies on mass density and magnetic field stabilization.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a dynamic axial magnetic field on a preconditioned single-wire Z-pinch

Jiang,

Wu,

Wang

et al. 2023

Nucl. Fusion

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In this study, the effect and mechanism of a dynamic axial magnetic field on a preconditioned single-wire Z-pinch were investigated experimentally and theoretically. Optical diagnostic methods, including shadowgraphy, interferometry, Faraday rotation, and Thomson scattering, have been used to measure the parameters of magnetized plasmas. Compression of the azimuthal and axial magnetic fields was observed, and the suppression of the plasma instability was recorded and analyzed. The results showed that an external axial magnetic field could reduce the plasma instability and non-uniformity, but prolong the implosion time and weaken the radiation intensity. In the implosion process with axial magnetic field, the plasma rotated at a speed similar to that of imploding, which could be regarded as a stabilization method. A simplified model of the diffusion and compression processes of a dynamic axial magnetic field was developed to investigate the conditions for maximizing the amplitude of the axial magnetic field. Subsequently, the snowplow model was used to calculate the effect of axial magnetic fields on the implosion process and energy conversion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%