PSI research in the ITER divertor parameter range at the FOM PSI-lab

Westerhout, J.; Koppers, W.R.; Vijvers, W.A.J.; Al, R.S.; Brezinsek, S.; Brons, S.; Eck, H.J.N. van; Engeln, Rah Richard; Groot, B. de; Koch, R.; Meiden, H.J. van der; Nuijten, M.P.; Philipps, V.; Pol, M. J. van de; Prins, P.R.; Samm, U.; Scholten, J.; Schram, D.C.; Schweer, B.; Smeets, P.H.M.; Whyte, D.G.; Zoethout, E.; Kleyn, Aart W.; Goedheer, W. J.; Cardozo, N.J. Lopes; Rooij, G.J. van

doi:10.1088/0031-8949/2007/t128/004

Cited by 41 publications

(31 citation statements)

References 7 publications

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“…The Pilot-PSI experiment uses a cascaded arc to produce high plasma densities (610 21 m À3 ) at low electron temperatures (T e 6 5 eV) [10,11]. The plasma is confined to a column of $15 mm diameter with the highest densities and temperatures located at the center of the column.…”

Section: Methodsmentioning

confidence: 99%

Hydrogenic retention in tungsten exposed to ITER divertor relevant plasma flux densities

Wright

Kleyn

Alves

et al. 2009

Journal of Nuclear Materials

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Section: Methodsmentioning

confidence: 99%

Hydrogenic retention in tungsten exposed to ITER divertor relevant plasma flux densities

Wright

Kleyn

Alves

et al. 2009

Journal of Nuclear Materials

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“…The importance of D.R. in those plasma conditions was investigated by comparing results of the Monte Carlo impurity transport simulation code ERO [15] with experiments in the linear plasma generator Pilot-PSI [16]. The first simulations of hydrocarbon transport in Pilot-PSI have been described elsewhere [17]; the present paper is a continuation of those modeling efforts.…”

Section: Introductionmentioning

confidence: 99%

Dissociative recombination and electron-impact de-excitation in CH photon emission under ITER divertor-relevant plasma conditions

Swaaij

Bystrov

Borodin

et al. 2012

Plasma Phys. Control. Fusion

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For understanding carbon erosion and redeposition in nuclear fusion devices, it is important to understand the transport and chemical break-up of hydrocarbon molecules in edge plasmas, often diagnosed by emission of the CH A 2 ∆-X 2 Π Gerö band around 430 nm. The CH A-level can be excited either by electronimpact or by dissociative recombination (D.R.) of hydrocarbon ions. These processes were included in the 3D Monte Carlo impurity transport code ERO. A series of methane injection experiments was performed in the high-density, low-temperature linear plasma generator Pilot-PSI, and simulated emission intensity profiles were benchmarked against these experiments. It was confirmed that excitation by D.R. dominates at T e < 1.5 eV. The results indicate that the fraction of D.R. events that lead to a CH radical in the A-level and consequent photon emission is at least 10%. Additionally, quenching of the excited CH radicals by electron impact de-excitation was included in the modeling. This quenching is shown to be significant: depending on the electron density, it reduces the effective CH emission by a factor of 1.4 at n e = 1.3 * 10 20 m −3 , to 2.8 at n e = 9.3 * 10 20 m −3 . Its inclusion significantly improved agreement between experiment and modeling.

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“…Pilot-PSI is also the small forerunner for the new plasma fusion experimental set-up Magnum-PSI [2]. The main goal of these set-ups is to study the interaction of high density magnetized plasmas with solid targets made of the same materials which will be used to cover the divertor of ITER tokamak.…”

Section: Introductionmentioning

confidence: 99%

Multi‐Channel Analyzer Investigations of Ion Flux at the Target Surface in Pilot‐PSI

Solomon

Anita

Costin

et al. 2010

Contrib. Plasma Phys.

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Pilot-PSI is a linear plasma device designed for investigations of plasma-surface interaction. A cascaded-arc plasma source operated in argon or/and hydrogen generates a high-density plasma that is magnetically confined on the vessel's axis, resulting a plasma column of about 1-2 cm in diameter which interacts with a solid target. A multi-channel analyzer was constructed to study the radial distribution of the ion flux at the target surface. The analyzer was placed in the centre of Pilot-PSI target and current-voltage characteristics were drawn for five collectors disposed at different radial positions. The ion flux was estimated from the ion part of the current-voltage characteristic for each collector. For densities lower than 10 19 m −3 (significantly below the maximum performance of Pilot-PSI), fluxes of up to 10 23 ions/m 2 s were measured. A difference of a factor four was measured between the maximum ion flux in the centre of the target and the flux at the edge, at a radial position of 1 cm.

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PSI research in the ITER divertor parameter range at the FOM PSI-lab

Cited by 41 publications

References 7 publications

Hydrogenic retention in tungsten exposed to ITER divertor relevant plasma flux densities

Hydrogenic retention in tungsten exposed to ITER divertor relevant plasma flux densities

Dissociative recombination and electron-impact de-excitation in CH photon emission under ITER divertor-relevant plasma conditions

Multi‐Channel Analyzer Investigations of Ion Flux at the Target Surface in Pilot‐PSI

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