Plasma–Surface Interactions Under High Heat and Particle Fluxes

Temmerman, G. De; Bystrov, K.; Liu, F Fan; Liu, W; Morgan, T.W.; Tanyeli, Irem; Berg, van den Ma; Xu, HY; Zielinski, JJ Jakub

doi:10.14311/1793

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…3 Divertor plasma parameters in ITER are expected to be n e > 10 20 m À3 with T e < 5 eV, leading to head loads of about 10 MW m À2 for steady state operation and up to a few gigawatts per meter square during intrinsic instabilities of the core such as edge-localized-modes (ELMs). 4 Power is conveyed to the PFC via the ion potential energy, kinetic energy of electrons, ions, and neutrals, and via radiated power. 5 To make such heat flux tolerable, the so-called detached plasma regime has to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of different impurities on plasma detachment in linear plasma machine Magnum-PSI

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Investigating the effect of different impurities on plasma detachment in linear plasma machine Magnum-PSI

et al. 2019

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“…Magnetically confined linear plasma devices are strongly contributing to plasma-surface interaction studies in nuclear fusion devices, a key area for the successful development of nuclear fusion as a large-scale energy source [1]. Magnum-PSI is such a facility designed to allow plasmasurface interaction (PSI) studies under high heat and particle fluxes, mimicking the conditions expected in the ITER divertor [2].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the charged particle fluxes across the target surface of Magnum-PSI

Costin

Anita

Popa

et al. 2016

Plasma Sources Sci. Technol.

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Linear plasma generators are plasma devices designed to study fusion-relevant plasma-surface interactions. The first requirement for such devices is to operate with adjustable and well characterized plasma parameters. In the linear plasma device Magnum-PSI, the distribution of the charged particle flux across the target surface can be tailored by the target bias. The process is based on the radial inhomogeneity of the plasma column and it is evidenced by electrical measurements via a 2D multi-probe system installed as target. Typical results are reported for a hydrogen discharge operated at 125 A and confined by a magnetic field strength of 0.95 T in the middle of the coils. The probes were biased in the range of -80 to -30 V, while the floating potential of the target was about -35 V. The results were obtained in steady-state regime of Magnum-PSI, being time-averaged over any type of fluctuations. Depending on the relative value of the target bias voltage with respect to the local floating potential in the plasma column, the entire target surface can be exposed to ion or electron dominated flux, respectively, or it can be divided into two adjacent zones: one exposed to electron flux and the other to ion flux. As a consequence of this effect, a floating conductive surface that interacts with an inhomogeneous plasma is exposed to non-zero local currents despite its overall null current and it is subjected to internal current flows.

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Spontaneous synthesis of carbon nanowalls, nanotubes and nanotips using high flux density plasmas

Bystrov¹,

Sanden²,

Arnas³

et al. 2014

Carbon

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We have investigated the formation of various carbon nanostructures using extreme plasma fluxes up to four orders of magnitude larger than in conventional plasma-enhanced chemical vapor deposition processing. Carbon nanowalls, multi-wall nanotubes, spherical nanoparticles and nanotips are among the structures detected with electron microscopy methods. Precursor injection or surface pretreatment were not required for the synthesis of the nanostructures. Preliminary experiments with varied plasma composition, sample bias and surface temperature have demonstrated the potential for optimizing the growth of the nanostructures in the current experimental setup .

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Plasma–Surface Interactions Under High Heat and Particle Fluxes

Cited by 7 publications

References 29 publications

Investigating the effect of different impurities on plasma detachment in linear plasma machine Magnum-PSI

Investigating the effect of different impurities on plasma detachment in linear plasma machine Magnum-PSI

Tailoring the charged particle fluxes across the target surface of Magnum-PSI

Spontaneous synthesis of carbon nanowalls, nanotubes and nanotips using high flux density plasmas

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