Investigation of the SOL using a multi-element instrumental poloidal limiter

Nedospasov, A. V.; Bychkov, Sergey; Gaponov, V.V.; Zykova, N.M.; Ivanov, R.S.; Kabanov, V.N.; Nekrylova, J.V.; Sazonov, A.V.; Stotsky, G.I.

doi:10.1016/0022-3115(90)90040-t

Cited by 9 publications

(1 citation statement)

References 4 publications

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“…It should be noted that, within the LCFS, during ICRH the particle flux increases, while the poloidal zero cross-correlation function C p remains at a low value. At these locations the sizes of the turbulent cells [17,18] could be smaller than the poloidal spacing between the probes. In this case, the calculated flux values may be lower than the true values.…”

Section: Resultsmentioning

confidence: 99%

Effects of ICRH on electrostatic fluctuations and particle transport in the boundary plasma of TEXTOR

et al. 1991

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Direct current (DC) driven and turbulence driven cross-field particle fluxes have been deduced from Langmuir probe measurements during discharges with ion cyclotron resonance heating (ICRH) in the TEXTOR tokamak. Spectral analysis of fluctuations of the floating potential at spatially separated probe pins has been used to determine the velocity associated with the poloidal rotation of the boundary plasma. Characteristics of the turbulence spectra of density and potential fluctuations at the edge during ICRH have been measured and compared with the corresponding spectra during standard ohmically heated discharges. It has been observed that both DC driven and turbulence driven fluxes increase significantly during ICRH. The measured high particle fluxes indicate motion in DC convective cells. The DC convective flux and the turbulence driven flux are partly counteracting.

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Section: Resultsmentioning

confidence: 99%

Effects of ICRH on electrostatic fluctuations and particle transport in the boundary plasma of TEXTOR

et al. 1991

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Vertical shift and current flow to limiters during disruptions in tokamaks

Nedospasov

Богомолов

Zykova

et al. 1992

Journal of Nuclear Materials

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Ion orbit loss and the poloidal electric field in a tokamak

1994

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Monte Carlo simulation studies for ion orbit loss in limiter tokamaks show a poloidal asymmetry in ion loss arising from differences in ion orbit geometry. Since electron loss to the limiter is uniformly distributed because of its tiny orbit width, the nonuniform ion loss could cause a poloidal electric field that would tend to make the ion loss to the limiter more uniform. A simple analytical derivation of this poloidal electric field and a discussion of its effects on ion movement and transport are also presented.

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Investigation of the SOL using a multi-element instrumental poloidal limiter

Cited by 9 publications

References 4 publications

Effects of ICRH on electrostatic fluctuations and particle transport in the boundary plasma of TEXTOR

Effects of ICRH on electrostatic fluctuations and particle transport in the boundary plasma of TEXTOR

Vertical shift and current flow to limiters during disruptions in tokamaks

Ion orbit loss and the poloidal electric field in a tokamak

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