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
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/11
Y1 - 2017/11
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
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U2 - 10.1016/j.fusengdes.2017.04.068
DO - 10.1016/j.fusengdes.2017.04.068
M3 - Article
AN - SCOPUS:85018713343
SN - 0920-3796
VL - 124
SP - 267
EP - 270
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -