Determination of magnetic fields based on the Zeeman effect in regimes inaccessible by Zeeman-splitting spectroscopy

Doron, R.; Mikitchuk, D.; Stollberg, Christine; Rosenzweig, Guy; Stambulchik, E.; Kroupp, E.; Maron, Y.; Hammer, D. A.

doi:10.1016/j.hedp.2013.10.004

Cited by 20 publications

(12 citation statements)

References 14 publications

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“…In the two methods described, B is obtained from comparison between line widths. This limits the minimum field magnitude measurable and requires high-accuracy line shape measurements and a high signal-to-noise ratio [5]. The third method, also applicable only when a dominant direction of ì B exists, is based on independently recording the full line shapes of the left-and right-handed circularly polarized components of Zeeman-split emissions observed along multiple chords through the plasma [21].…”

Section: The Two-polarizations Methodsmentioning

confidence: 99%

Measurements of the spatial magnetic field distribution in a z-pinch plasma throughout the stagnation process

et al. 2017

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We report on measurements, made for the first time for an imploding plasma at its stagnation, of the magnetic field spatial distribution. Utilized for the measurements is a spectroscopic technique based on simultaneous recording of each of the left-and right-handed circularly polarized Zeeman emissions. While this method allows for overcoming the Stark-and Doppler-broadenings that obscure the Zeeman splitting, it requires a line of sight that is parallel to the magnetic field lines. To this end, the radial charge-state distribution in the stagnating z-pinch plasma was measured, and the method was employed for emission lines of several selected charge states located in various radial locations. This also allowed for measuring the time-resolved magnetic field radial distribution in a single discharge, which is advantageous for high-energy-density plasma experiments. These distributions were measured at various locations along the pinch axis. K : Plasma diagnostics-charged-particle spectroscopy; Plasma diagnostics-high speed photography; Plasma diagnostics-interferometry, spectroscopy and imaging 1Corresponding author.

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Section: The Two-polarizations Methodsmentioning

confidence: 99%

Measurements of the spatial magnetic field distribution in a z-pinch plasma throughout the stagnation process

et al. 2017

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“…Here, we present an experimental determination of B θ throughout the magnetized plasma implosion, achieved using a noninvasive spectroscopic technique that provides a high sensitivity for the Zeeman effect [26]. This technique is based on the polarization properties of the Zeeman components for light emission viewed parallel to the B-field, as described in [27][28][29][30], and recently implemented for Z-pinch implosions [24].…”

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confidence: 99%

“…Since, the Zeeman splitting within each of the σ components is small ( 0.025Å for B = 1 T), each of the σ + and σ − line shapes is fitted with a Voigt profile, where the Gaussian part accounts for instrumental and Doppler broadening, and the Lorentzian part is due to the Stark broadening. B θ is then extracted from the wavelength difference between the peaks (∆λ) of the best fits (where B θ (T)= 5 × ∆λ(Å) [26], for the Ar III line), and n e is obtained from the Lorentzian width. Figures 2c,d are the same as Figs.…”

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Effects of a Preembedded Axial Magnetic Field on the Current Distribution in a Z -Pinch Implosion

et al. 2019

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“…Contrary to what had been believed, at most 1/3 of the discharge current was found to flow within the highly compressed stagnating plasma (SP). The direct confirmation of this study requires experimental measurements of B θ during the stagnation and close to the SP, a task that is extremely difficult due to the high electron density n e , the high ion velocities, and the transient nature of the plasma [21].…”

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confidence: 78%

Observation of fast current redistribution in an imploding plasma column

Stollberg¹,

Kroupp²,

Mikitchuk³

et al. 2021

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Spectroscopic measurements of the magnetic field evolution in a Z-pinch throughout stagnation and with particularly high spatial resolution reveal a sudden current redistribution from the stagnating plasma (SP) to a low density plasma (LDP) at larger radii, while the SP continues to implode. Based on the plasma parameters it is shown that the current is transferred to an increasingconductance LDP outside the stagnation, a process likely to be induced by the increasing impedance of the SP. Since an LDP often exists around imploding plasmas and in various pulsed-power systems, such a fast current redistribution may dramatically affect the behavior and achievable parameters in these systems.

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Determination of magnetic fields based on the Zeeman effect in regimes inaccessible by Zeeman-splitting spectroscopy

Cited by 20 publications

References 14 publications

Measurements of the spatial magnetic field distribution in a z-pinch plasma throughout the stagnation process

Measurements of the spatial magnetic field distribution in a z-pinch plasma throughout the stagnation process

Effects of a Preembedded Axial Magnetic Field on the Current Distribution in a Z -Pinch Implosion

Observation of fast current redistribution in an imploding plasma column

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