High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility

H.J.N. van Eck; G.R.A. Akkermans; S. Alonso van der Westen; D.U.B. Aussems; M. van Berkel; S. Brons; I.G.J. Classen; H.J. van der Meiden; T.W. Morgan; M.J. van de Pol; J. Scholten; J.W.M. Vernimmen; E.G.P. Vos; M.R. de Baar

doi:10.1016/j.fusengdes.2019.04.020

High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility

H.J.N. van Eck (Corresponding author)
, G.R.A. Akkermans
, S. Alonso van der Westen
, D.U.B. Aussems
, M. van Berkel
, S. Brons
, I.G.J. Classen
, H.J. van der Meiden
, T.W. Morgan
, M.J. van de Pol
, J. Scholten
, J.W.M. Vernimmen
, E.G.P. Vos
, M.R. de Baar

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The Magnum-PSI facility is unique in its ability to produce and even exceed the heat and particle fluxes expected in the divertor of a fusion reactor, combined with good access to the plasma-material interaction region for diagnostics and relatively easy sample manipulation. In addition, it is possible to study the effects of transient heat loads on a plasma-facing surface, similar to those expected during so called Edge Localized Modes. By virtue of a newly installed superconducting magnet, Magnum-PSI can now maintain these conditions for hours on end for truly long term tests of candidate plasma facing materials. The electron density and temperature in the plasma beam center as a function of different magnetic fields up to 1.6 T, gas flow and source current are determined: particle fluxes greater than 10 ²⁵ m ⁻² s ⁻¹ and heat fluxes of up to 50 MW m ⁻² are obtained. Linear regression and artificial neural network analysis have been used to gain insight in the general behavior of plasma conditions as a function of these machine settings. The plasma conditions during transient plasma heat loading have also been determined. These capabilities are now being exploited to reach fluence of up to 10 ³⁰ particles m ⁻² at ITER-relevant conditions, equivalent to a significant fraction of the divertor service lifetime for the first time.

Original language	English
Pages (from-to)	26-32
Number of pages	7
Journal	Fusion Engineering and Design
Volume	142
DOIs	https://doi.org/10.1016/j.fusengdes.2019.04.020
Publication status	Published - 1 May 2019

Funding

We acknowledge Jonathan van den Berg and Karel van de Plassche for their input on ANNs. The actively-cooled monoblock chain was supplied by the ITER Organization and F4E as part of a Eurofusion-funded experiment to investigate the effect of ITER-relevant fluences on the properties of tungsten. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission. DIFFER is a partner in the Trilateral Euregio Cluster TEC.

Keywords

Artificial neural network analysis
Divertor
Edge localized modes
High heat flux
Linear plasma devices
Plasma-surface interactions

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10.1016/j.fusengdes.2019.04.020

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van Eck, H. J. N., Akkermans, G. R. A., Alonso van der Westen, S., Aussems, D. U. B., van Berkel, M., Brons, S., Classen, I. G. J., van der Meiden, H. J., Morgan, T. W., van de Pol, M. J., Scholten, J., Vernimmen, J. W. M., Vos, E. G. P., & de Baar, M. R. (2019). High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility. Fusion Engineering and Design, 142, 26-32. https://doi.org/10.1016/j.fusengdes.2019.04.020

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title = "High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility",

abstract = " The Magnum-PSI facility is unique in its ability to produce and even exceed the heat and particle fluxes expected in the divertor of a fusion reactor, combined with good access to the plasma-material interaction region for diagnostics and relatively easy sample manipulation. In addition, it is possible to study the effects of transient heat loads on a plasma-facing surface, similar to those expected during so called Edge Localized Modes. By virtue of a newly installed superconducting magnet, Magnum-PSI can now maintain these conditions for hours on end for truly long term tests of candidate plasma facing materials. The electron density and temperature in the plasma beam center as a function of different magnetic fields up to 1.6 T, gas flow and source current are determined: particle fluxes greater than 10 25 m −2 s −1 and heat fluxes of up to 50 MW m −2 are obtained. Linear regression and artificial neural network analysis have been used to gain insight in the general behavior of plasma conditions as a function of these machine settings. The plasma conditions during transient plasma heat loading have also been determined. These capabilities are now being exploited to reach fluence of up to 10 30 particles m −2 at ITER-relevant conditions, equivalent to a significant fraction of the divertor service lifetime for the first time. ",

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doi = "10.1016/j.fusengdes.2019.04.020",

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van Eck, HJN, Akkermans, GRA, Alonso van der Westen, S, Aussems, DUB, van Berkel, M, Brons, S, Classen, IGJ, van der Meiden, HJ, Morgan, TW, van de Pol, MJ, Scholten, J, Vernimmen, JWM, Vos, EGP & de Baar, MR 2019, 'High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility', Fusion Engineering and Design, vol. 142, pp. 26-32. https://doi.org/10.1016/j.fusengdes.2019.04.020

TY - JOUR

T1 - High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility

AU - van Eck, H.J.N.

AU - Akkermans, G.R.A.

AU - Alonso van der Westen, S.

AU - Aussems, D.U.B.

AU - van Berkel, M.

AU - Brons, S.

AU - Classen, I.G.J.

AU - van der Meiden, H.J.

AU - Morgan, T.W.

AU - van de Pol, M.J.

AU - Scholten, J.

AU - Vernimmen, J.W.M.

AU - Vos, E.G.P.

AU - de Baar, M.R.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - The Magnum-PSI facility is unique in its ability to produce and even exceed the heat and particle fluxes expected in the divertor of a fusion reactor, combined with good access to the plasma-material interaction region for diagnostics and relatively easy sample manipulation. In addition, it is possible to study the effects of transient heat loads on a plasma-facing surface, similar to those expected during so called Edge Localized Modes. By virtue of a newly installed superconducting magnet, Magnum-PSI can now maintain these conditions for hours on end for truly long term tests of candidate plasma facing materials. The electron density and temperature in the plasma beam center as a function of different magnetic fields up to 1.6 T, gas flow and source current are determined: particle fluxes greater than 10 25 m −2 s −1 and heat fluxes of up to 50 MW m −2 are obtained. Linear regression and artificial neural network analysis have been used to gain insight in the general behavior of plasma conditions as a function of these machine settings. The plasma conditions during transient plasma heat loading have also been determined. These capabilities are now being exploited to reach fluence of up to 10 30 particles m −2 at ITER-relevant conditions, equivalent to a significant fraction of the divertor service lifetime for the first time.

AB - The Magnum-PSI facility is unique in its ability to produce and even exceed the heat and particle fluxes expected in the divertor of a fusion reactor, combined with good access to the plasma-material interaction region for diagnostics and relatively easy sample manipulation. In addition, it is possible to study the effects of transient heat loads on a plasma-facing surface, similar to those expected during so called Edge Localized Modes. By virtue of a newly installed superconducting magnet, Magnum-PSI can now maintain these conditions for hours on end for truly long term tests of candidate plasma facing materials. The electron density and temperature in the plasma beam center as a function of different magnetic fields up to 1.6 T, gas flow and source current are determined: particle fluxes greater than 10 25 m −2 s −1 and heat fluxes of up to 50 MW m −2 are obtained. Linear regression and artificial neural network analysis have been used to gain insight in the general behavior of plasma conditions as a function of these machine settings. The plasma conditions during transient plasma heat loading have also been determined. These capabilities are now being exploited to reach fluence of up to 10 30 particles m −2 at ITER-relevant conditions, equivalent to a significant fraction of the divertor service lifetime for the first time.

KW - Artificial neural network analysis

KW - Divertor

KW - Edge localized modes

KW - High heat flux

KW - Linear plasma devices

KW - Plasma-surface interactions

UR - https://www.scopus.com/pages/publications/85064183100

U2 - 10.1016/j.fusengdes.2019.04.020

DO - 10.1016/j.fusengdes.2019.04.020

M3 - Article

AN - SCOPUS:85064183100

SN - 0920-3796

VL - 142

SP - 26

EP - 32

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

High-fluence and high-flux performance characteristics of the superconducting Magnum-PSI linear plasma facility

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Keywords

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