Design of the Wendelstein 7-X inertially cooled Test Divertor Unit Scraper Element

Arnold Lumsdaine; Jean Boscary; Joris Fellinger; Jeff Harris; Hauke Hölbe; Ralf König; Jeremy Lore; Dean McGinnis; Hutch Neilson; Peter Titus; Jörg Tretter

doi:10.1016/j.fusengdes.2015.02.012

Design of the Wendelstein 7-X inertially cooled Test Divertor Unit Scraper Element

Arnold Lumsdaine, Jean Boscary, Joris Fellinger, Jeff Harris, Hauke Hölbe, Ralf König, Jeremy Lore, Dean McGinnis, Hutch Neilson, Peter Titus, Jörg Tretter

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

7 Scopus citations

Abstract

The Wendelstein 7-X stellarator is scheduled to begin operation in 2015, and to achieve full power steady-state operation in 2019. Computational simulations have indicated that for certain plasma configurations in the steady-state operation, the ends of the divertor targets may receive heat fluxes beyond their qualified technological limit. To address this issue, a high heat-flux "scraper element" (HHF-SE) has been designed that can protect the sensitive divertor target region. The surface profile of the HHF-SE has been carefully designed to meet challenging engineering requirements and severe spatial limitations through an iterative process involving physics simulations, engineering analysis, and computer aided design rendering. The desire to examine how the scraper element interacts with the plasma, both in terms of how it protects the divertor, and how it affects the neutral pumping efficiency, has led to the consideration of installing an inertially cooled version during the short pulse operation phase. This Test Divertor Unit Scraper Element (TDU-SE) would replicate the surface profile of the HHF-SE. The design and instrumentation of this component must be completed carefully in order to satisfy the requirements of the machine operation, as well as to support the possible installation of the HHF-SE for steady-state operation.

Original language	English
Pages (from-to)	1357-1361
Number of pages	5
Journal	Fusion Engineering and Design
Volume	98-99
DOIs	https://doi.org/10.1016/j.fusengdes.2015.02.012
State	Published - Oct 1 2015

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funders	Funder number
U.S. Department of Energy
Horizon 2020 Framework Programme
Horizon 2020	633053

Keywords

Divertor
High heat flux
Plasma facing component
Stellarator
Wendelstein 7-X

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.fusengdes.2015.02.012

Cite this

@article{ff40a680001a435eac8870cdaa1683d5,

title = "Design of the Wendelstein 7-X inertially cooled Test Divertor Unit Scraper Element",

abstract = "The Wendelstein 7-X stellarator is scheduled to begin operation in 2015, and to achieve full power steady-state operation in 2019. Computational simulations have indicated that for certain plasma configurations in the steady-state operation, the ends of the divertor targets may receive heat fluxes beyond their qualified technological limit. To address this issue, a high heat-flux {"}scraper element{"} (HHF-SE) has been designed that can protect the sensitive divertor target region. The surface profile of the HHF-SE has been carefully designed to meet challenging engineering requirements and severe spatial limitations through an iterative process involving physics simulations, engineering analysis, and computer aided design rendering. The desire to examine how the scraper element interacts with the plasma, both in terms of how it protects the divertor, and how it affects the neutral pumping efficiency, has led to the consideration of installing an inertially cooled version during the short pulse operation phase. This Test Divertor Unit Scraper Element (TDU-SE) would replicate the surface profile of the HHF-SE. The design and instrumentation of this component must be completed carefully in order to satisfy the requirements of the machine operation, as well as to support the possible installation of the HHF-SE for steady-state operation.",

keywords = "Divertor, High heat flux, Plasma facing component, Stellarator, Wendelstein 7-X",

author = "Arnold Lumsdaine and Jean Boscary and Joris Fellinger and Jeff Harris and Hauke H{\"o}lbe and Ralf K{\"o}nig and Jeremy Lore and Dean McGinnis and Hutch Neilson and Peter Titus and J{\"o}rg Tretter",

year = "2015",

month = oct,

day = "1",

doi = "10.1016/j.fusengdes.2015.02.012",

language = "English",

volume = "98-99",

pages = "1357--1361",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier",

}

TY - JOUR

T1 - Design of the Wendelstein 7-X inertially cooled Test Divertor Unit Scraper Element

AU - Lumsdaine, Arnold

AU - Boscary, Jean

AU - Fellinger, Joris

AU - Harris, Jeff

AU - Hölbe, Hauke

AU - König, Ralf

AU - Lore, Jeremy

AU - McGinnis, Dean

AU - Neilson, Hutch

AU - Titus, Peter

AU - Tretter, Jörg

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The Wendelstein 7-X stellarator is scheduled to begin operation in 2015, and to achieve full power steady-state operation in 2019. Computational simulations have indicated that for certain plasma configurations in the steady-state operation, the ends of the divertor targets may receive heat fluxes beyond their qualified technological limit. To address this issue, a high heat-flux "scraper element" (HHF-SE) has been designed that can protect the sensitive divertor target region. The surface profile of the HHF-SE has been carefully designed to meet challenging engineering requirements and severe spatial limitations through an iterative process involving physics simulations, engineering analysis, and computer aided design rendering. The desire to examine how the scraper element interacts with the plasma, both in terms of how it protects the divertor, and how it affects the neutral pumping efficiency, has led to the consideration of installing an inertially cooled version during the short pulse operation phase. This Test Divertor Unit Scraper Element (TDU-SE) would replicate the surface profile of the HHF-SE. The design and instrumentation of this component must be completed carefully in order to satisfy the requirements of the machine operation, as well as to support the possible installation of the HHF-SE for steady-state operation.

AB - The Wendelstein 7-X stellarator is scheduled to begin operation in 2015, and to achieve full power steady-state operation in 2019. Computational simulations have indicated that for certain plasma configurations in the steady-state operation, the ends of the divertor targets may receive heat fluxes beyond their qualified technological limit. To address this issue, a high heat-flux "scraper element" (HHF-SE) has been designed that can protect the sensitive divertor target region. The surface profile of the HHF-SE has been carefully designed to meet challenging engineering requirements and severe spatial limitations through an iterative process involving physics simulations, engineering analysis, and computer aided design rendering. The desire to examine how the scraper element interacts with the plasma, both in terms of how it protects the divertor, and how it affects the neutral pumping efficiency, has led to the consideration of installing an inertially cooled version during the short pulse operation phase. This Test Divertor Unit Scraper Element (TDU-SE) would replicate the surface profile of the HHF-SE. The design and instrumentation of this component must be completed carefully in order to satisfy the requirements of the machine operation, as well as to support the possible installation of the HHF-SE for steady-state operation.

KW - Divertor

KW - High heat flux

KW - Plasma facing component

KW - Stellarator

KW - Wendelstein 7-X

UR - http://www.scopus.com/inward/record.url?scp=84943587671&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2015.02.012

DO - 10.1016/j.fusengdes.2015.02.012

M3 - Article

AN - SCOPUS:84943587671

SN - 0920-3796

VL - 98-99

SP - 1357

EP - 1361

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Design of the Wendelstein 7-X inertially cooled Test Divertor Unit Scraper Element

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this