Design and analysis of divertor scraper elements for the W7-X stellarator

Jeremy D. Lore; Tamara Andreeva; Jean Boscary; Sergey Bozhenkov; Joachim Geiger; Jeffrey H. Harris; Hauke Hoelbe; Arnold Lumsdaine; Dean McGinnis; Alan Peacock; Joseph Tipton

doi:10.1109/TPS.2014.2303649

Design and analysis of divertor scraper elements for the W7-X stellarator

Jeremy D. Lore, Tamara Andreeva, Jean Boscary, Sergey Bozhenkov, Joachim Geiger, Jeffrey H. Harris, Hauke Hoelbe, Arnold Lumsdaine, Dean McGinnis, Alan Peacock, Joseph Tipton

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

33 Scopus citations

Abstract

A set of new water-cooled divertor components is being designed for the Wendelstein 7-X stellarator to protect the edges of the primary plasma facing components during the bootstrap current evolution (∼40}~s). These new components, referred to as scraper elements (SEs), will intercept field lines and associated heat flux that would otherwise overload the main target edges in certain operational scenarios. The SEs are calculated to experience peak heat fluxes ∼15-16~MW/m² and will be constructed from carbon fiber reinforced composite monoblocks of a type that has been qualified for ITER. The heat flux distribution and magnitude is calculated from field line following in a 3-D magnetic field that includes the contribution from plasma currents. The heat flux calculations are coupled with an engineering design in an iterative process to generate SEs that meet the design criteria while reducing the geometric complexity of the elements.

Original language	English
Article number	6737315
Pages (from-to)	539-544
Number of pages	6
Journal	IEEE Transactions on Plasma Science
Volume	42
Issue number	3
DOIs	https://doi.org/10.1109/TPS.2014.2303649
State	Published - Mar 2014

Keywords

Divertor
Wendelstein 7-X (W7-X)
heat flux
island divertor (ID)
stellarator

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10.1109/TPS.2014.2303649

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title = "Design and analysis of divertor scraper elements for the W7-X stellarator",

abstract = "A set of new water-cooled divertor components is being designed for the Wendelstein 7-X stellarator to protect the edges of the primary plasma facing components during the bootstrap current evolution (∼40}~s). These new components, referred to as scraper elements (SEs), will intercept field lines and associated heat flux that would otherwise overload the main target edges in certain operational scenarios. The SEs are calculated to experience peak heat fluxes ∼15-16~MW/m2 and will be constructed from carbon fiber reinforced composite monoblocks of a type that has been qualified for ITER. The heat flux distribution and magnitude is calculated from field line following in a 3-D magnetic field that includes the contribution from plasma currents. The heat flux calculations are coupled with an engineering design in an iterative process to generate SEs that meet the design criteria while reducing the geometric complexity of the elements.",

keywords = "Divertor, Wendelstein 7-X (W7-X), heat flux, island divertor (ID), stellarator",

author = "Lore, {Jeremy D.} and Tamara Andreeva and Jean Boscary and Sergey Bozhenkov and Joachim Geiger and Harris, {Jeffrey H.} and Hauke Hoelbe and Arnold Lumsdaine and Dean McGinnis and Alan Peacock and Joseph Tipton",

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language = "English",

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AU - Lore, Jeremy D.

AU - Andreeva, Tamara

AU - Boscary, Jean

AU - Bozhenkov, Sergey

AU - Geiger, Joachim

AU - Harris, Jeffrey H.

AU - Hoelbe, Hauke

AU - Lumsdaine, Arnold

AU - McGinnis, Dean

AU - Peacock, Alan

AU - Tipton, Joseph

PY - 2014/3

Y1 - 2014/3

N2 - A set of new water-cooled divertor components is being designed for the Wendelstein 7-X stellarator to protect the edges of the primary plasma facing components during the bootstrap current evolution (∼40}~s). These new components, referred to as scraper elements (SEs), will intercept field lines and associated heat flux that would otherwise overload the main target edges in certain operational scenarios. The SEs are calculated to experience peak heat fluxes ∼15-16~MW/m2 and will be constructed from carbon fiber reinforced composite monoblocks of a type that has been qualified for ITER. The heat flux distribution and magnitude is calculated from field line following in a 3-D magnetic field that includes the contribution from plasma currents. The heat flux calculations are coupled with an engineering design in an iterative process to generate SEs that meet the design criteria while reducing the geometric complexity of the elements.

AB - A set of new water-cooled divertor components is being designed for the Wendelstein 7-X stellarator to protect the edges of the primary plasma facing components during the bootstrap current evolution (∼40}~s). These new components, referred to as scraper elements (SEs), will intercept field lines and associated heat flux that would otherwise overload the main target edges in certain operational scenarios. The SEs are calculated to experience peak heat fluxes ∼15-16~MW/m2 and will be constructed from carbon fiber reinforced composite monoblocks of a type that has been qualified for ITER. The heat flux distribution and magnitude is calculated from field line following in a 3-D magnetic field that includes the contribution from plasma currents. The heat flux calculations are coupled with an engineering design in an iterative process to generate SEs that meet the design criteria while reducing the geometric complexity of the elements.

KW - Divertor

KW - Wendelstein 7-X (W7-X)

KW - heat flux

KW - island divertor (ID)

KW - stellarator

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M3 - Article

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SN - 0093-3813

VL - 42

SP - 539

EP - 544

JO - IEEE Transactions on Plasma Science

JF - IEEE Transactions on Plasma Science

IS - 3

M1 - 6737315

ER -

Design and analysis of divertor scraper elements for the W7-X stellarator

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Keywords

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