Contribution of 

	    
	    
	   drifts and parallel currents to divertor asymmetries

Rozhansky, V.; Molchanov, P.; Veselova, I.; Voskoboynikov, S.; Kirk, A.; Coster, D.

doi:10.1088/0029-5515/52/10/103017

Cited by 59 publications

(97 citation statements)

References 15 publications

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“…The parallel current flowing in the divertor adds to the complexity of the problem. A systematical study of these effects based on the simulations with B2SOLPS5.2 was done in [54]. A connected double-null (CDN) configuration of MAST was chosen so that all up-down asymmetries should be connected with drifts and parallel currents.…”

Section: Drifts and Currents In Sol And Divertormentioning

confidence: 99%

“…The convective electron heat flow is in the opposite direction, As a result a power asymmetry (larger power to the low divertors) is also observed both in the modeling [54] and in the experiments [55][56][57]. For the single null configuration the LFS-HFS asymmetry caused by geometry causes a thermal current from the hotter LFS divertor to the colder and denser HFS one.…”

Section: Drifts and Currents In Sol And Divertormentioning

confidence: 99%

“…It was demonstrated that the convective electron heat flux from the HFS to the LFS divertor amplifies the asymmetry. Switching on the drifts causes further amplification of the asymmetry [54].…”

Section: Drifts and Currents In Sol And Divertormentioning

confidence: 99%

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Drifts, Currents, and Radial Electric Field in the Edge Plasma with Impact on Pedestal, Divertor Asymmetry and RMP Consequences

Rozhansky

2014

Contrib. Plasma Phys.

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Methanol is considered a promising liquid fuel in context with electrochemical energy conversion and storage for mobile applications. It is shown here that a direct methanol fuel cell can be used for spontaneous charging and discharging a supercapacitor (SC) for intermediate storage of chemical energy. Thereby, protons and electrons of the methanol‐derived hydrogen are stored separately in the electrical double layer of the SC electrode. The charging and discharging of this fuel cell–SC hybride device is investigated in experiments of spontaneous conditions (closed circuit) and also under externally enforced constant voltage sweep rate (cyclic voltammetry) and under constant current conditions. Alternatively, gas phase hydrogen is generated from methanol in an electro‐reforming process. When more efficient anode electrocatalysts become available this may become the method of choice for on‐board and on demand hydrogen production in mobile applications.

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Section: Drifts and Currents In Sol And Divertormentioning

confidence: 99%

Section: Drifts and Currents In Sol And Divertormentioning

confidence: 99%

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Drifts, Currents, and Radial Electric Field in the Edge Plasma with Impact on Pedestal, Divertor Asymmetry and RMP Consequences

Rozhansky

2014

Contrib. Plasma Phys.

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“…All simulations have been performed in SOLPS5.0 with EIRENE without drifts and neutral-neutral collisions. Drift effects in MAST and MAST-U are studied elsewhere [7]. Neutral-neutral interactions are not expected to play a role in the studied MAST-U cases where neutral densities are below 1 Â 10 20 m À3 .…”

Section: Introductionmentioning

confidence: 98%

The effect of the Super-X divertor of MAST Upgrade on impurity radiation as modelled by SOLPS

Havlickova

Wischmeier

Lipschultz

et al. 2015

Journal of Nuclear Materials

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“…However, these effects become weak in high density case. 10 The poloidal E Â B drift across the PFR is found plays an important role in divertor asymmetry in a puff-and-pump experiment in DIII-D. 11 The contributions of classical drifts to divertor asymmetry are investigated by some simulation codes, e.g., SOLPS, 10,12-14 UEDGE, 15,16 and EDGE2D, 17,18 indicating closely relationship between divertor asymmetry and SOL flow.…”

mentioning

confidence: 99%

Effects of heating power on divertor in-out asymmetry and scrape-off layer flow in reversed field on Experimental Advanced Superconducting Tokamak

et al. 2014

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The dependence of divertor asymmetry and scrape-off layer (SOL) flow on heating power has been investigated in the Experimental Advanced Superconducting Tokamak (EAST). Divertor plasma exhibits an outboard-enhanced in-out asymmetry in heat flux in lower single null configuration for in reversed (ion rB drift direction toward the upper X-point) field directions. Upper single null exhibits an inboard-favored asymmetry in low heating power condition, while exhibits an outboard-favored asymmetry when increasing the heating power. Double null has the strongest in-out asymmetry in heat flux, favoring the outer divertor. The in-out asymmetry ratios of q t;out =q t;in and P out =P total increase with the power across the separatrix P loss , which is probably induced by the enhanced radial particle transport due to a large pressure gradient. The characteristics of the measured SOL parallel flow under various discharge conditions are consistent with the Pfirsch-Schl€ uter (PS) flow with the parallel Mach number M k decreasing with the line averaged density but increasing with P loss , in the same direction as the PS flow. The contributions of both poloidal E Â B drift and parallel flow on poloidal particle transport in SOL on EAST are also assessed. V C 2014 AIP Publishing LLC. [http://dx.

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Contribution of drifts and parallel currents to divertor asymmetries

Abstract: A systematical study of drift and parallel current effects is reported based on the analysis of the simulations by the B2SOLPS5.2 transport code. It is demonstrated that divertor asymmetry is caused or amplified by the poloidal drift and parallel thermal current.

Cited by 59 publications

References 15 publications

Drifts, Currents, and Radial Electric Field in the Edge Plasma with Impact on Pedestal, Divertor Asymmetry and RMP Consequences

Drifts, Currents, and Radial Electric Field in the Edge Plasma with Impact on Pedestal, Divertor Asymmetry and RMP Consequences

The effect of the Super-X divertor of MAST Upgrade on impurity radiation as modelled by SOLPS

Effects of heating power on divertor in-out asymmetry and scrape-off layer flow in reversed field on Experimental Advanced Superconducting Tokamak

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