New model of plasma heat load on the first wall

The Joint Special Design Team for Fusion DEMO

Research output: Contribution to journalArticle

Abstract

Scrape Off Layer (SOL) plasma circumnavigates the torus along magnetic field lines, and some part of it encounters a leading edge of the first wall (FW). This leads the concentration of the plasma energy in a small area, causing a hot spot. In a DEMO reactor that deals with a few hundreds of MW of plasma energy in the SOL, the leading edge problem is a critical issue in the FW design. For the design purposes in DEMO and power reactors, a new analysis method is introduced, where a flux tube is poloidally divided into the Apple Peel Like Elements (APPLEs) and each APPLE is enclosed by adjacent 4 magnetic field lines. Considering the contact area of the APPLEs on the FW and the radial energy transport between the APPLEs, FW heat load profile can be analyzed. The result of the case that the fusion power is 1.5 GW, and the major radius is 8.2 m, shows that the heat load is peaked to about 1 MW/m2 near the inboard midplane and the baffle plate. This method is expected to be useful for the DEMO design.

Original languageEnglish
Pages (from-to)267-270
Number of pages4
JournalFusion Engineering and Design
Volume124
DOIs
Publication statusPublished - 2017 Nov 1
Externally publishedYes

Fingerprint

Thermal load
Plasmas
Magnetic fields
Fusion reactions
Fluxes

Keywords

  • DEMO
  • First wall
  • Fusion reactor design
  • Plasma heat load
  • SOL

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

New model of plasma heat load on the first wall. / The Joint Special Design Team for Fusion DEMO.

In: Fusion Engineering and Design, Vol. 124, 01.11.2017, p. 267-270.

Research output: Contribution to journalArticle

The Joint Special Design Team for Fusion DEMO. / New model of plasma heat load on the first wall. In: Fusion Engineering and Design. 2017 ; Vol. 124. pp. 267-270.
@article{d2538d78026449bcac088ffba7850318,
title = "New model of plasma heat load on the first wall",
abstract = "Scrape Off Layer (SOL) plasma circumnavigates the torus along magnetic field lines, and some part of it encounters a leading edge of the first wall (FW). This leads the concentration of the plasma energy in a small area, causing a hot spot. In a DEMO reactor that deals with a few hundreds of MW of plasma energy in the SOL, the leading edge problem is a critical issue in the FW design. For the design purposes in DEMO and power reactors, a new analysis method is introduced, where a flux tube is poloidally divided into the Apple Peel Like Elements (APPLEs) and each APPLE is enclosed by adjacent 4 magnetic field lines. Considering the contact area of the APPLEs on the FW and the radial energy transport between the APPLEs, FW heat load profile can be analyzed. The result of the case that the fusion power is 1.5 GW, and the major radius is 8.2 m, shows that the heat load is peaked to about 1 MW/m2 near the inboard midplane and the baffle plate. This method is expected to be useful for the DEMO design.",
keywords = "DEMO, First wall, Fusion reactor design, Plasma heat load, SOL",
author = "{The Joint Special Design Team for Fusion DEMO} and Yuya Miyoshi and Nobuyuki Asakura and Kazuo Hoshino and Ryoji Hiwatari and Youji Someya and Haruhiko Takase and Yoshiteru Sakamoto and Kenji Tobita",
year = "2017",
month = "11",
day = "1",
doi = "10.1016/j.fusengdes.2017.04.068",
language = "English",
volume = "124",
pages = "267--270",
journal = "Fusion Engineering and Design",
issn = "0920-3796",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - New model of plasma heat load on the first wall

AU - The Joint Special Design Team for Fusion DEMO

AU - Miyoshi, Yuya

AU - Asakura, Nobuyuki

AU - Hoshino, Kazuo

AU - Hiwatari, Ryoji

AU - Someya, Youji

AU - Takase, Haruhiko

AU - Sakamoto, Yoshiteru

AU - Tobita, Kenji

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Scrape Off Layer (SOL) plasma circumnavigates the torus along magnetic field lines, and some part of it encounters a leading edge of the first wall (FW). This leads the concentration of the plasma energy in a small area, causing a hot spot. In a DEMO reactor that deals with a few hundreds of MW of plasma energy in the SOL, the leading edge problem is a critical issue in the FW design. For the design purposes in DEMO and power reactors, a new analysis method is introduced, where a flux tube is poloidally divided into the Apple Peel Like Elements (APPLEs) and each APPLE is enclosed by adjacent 4 magnetic field lines. Considering the contact area of the APPLEs on the FW and the radial energy transport between the APPLEs, FW heat load profile can be analyzed. The result of the case that the fusion power is 1.5 GW, and the major radius is 8.2 m, shows that the heat load is peaked to about 1 MW/m2 near the inboard midplane and the baffle plate. This method is expected to be useful for the DEMO design.

AB - Scrape Off Layer (SOL) plasma circumnavigates the torus along magnetic field lines, and some part of it encounters a leading edge of the first wall (FW). This leads the concentration of the plasma energy in a small area, causing a hot spot. In a DEMO reactor that deals with a few hundreds of MW of plasma energy in the SOL, the leading edge problem is a critical issue in the FW design. For the design purposes in DEMO and power reactors, a new analysis method is introduced, where a flux tube is poloidally divided into the Apple Peel Like Elements (APPLEs) and each APPLE is enclosed by adjacent 4 magnetic field lines. Considering the contact area of the APPLEs on the FW and the radial energy transport between the APPLEs, FW heat load profile can be analyzed. The result of the case that the fusion power is 1.5 GW, and the major radius is 8.2 m, shows that the heat load is peaked to about 1 MW/m2 near the inboard midplane and the baffle plate. This method is expected to be useful for the DEMO design.

KW - DEMO

KW - First wall

KW - Fusion reactor design

KW - Plasma heat load

KW - SOL

UR - http://www.scopus.com/inward/record.url?scp=85018713343&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85018713343&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2017.04.068

DO - 10.1016/j.fusengdes.2017.04.068

M3 - Article

VL - 124

SP - 267

EP - 270

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

ER -