Journal Article

FZJ-2023-01462

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Thermomechanical analysis of a multi-reflectometer system for DEMO

Nietiadi, Y. (Corresponding author) ; Luís, R. ; Silva, A. ; Belo, J. H. ; Vale, A. ; Malaquias, A. ; Gonçalves, B. ; da Silva, F. ; Santos, J. ; Ricardo, E. ; Biel, W.FZJ*

2023
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/34113  doi:10.1016/j.fusengdes.2023.113530

Abstract: Microwave reflectometry systems are currently considered as a possible solution for plasma position and control, in DEMO. The primary integration approach for this diagnostic involves the incorporation of several groups of antennas and waveguides into a diagnostics slim cassette (DSC), a full 20–25 cm thick poloidal sector dedicated to diagnostics. Since the passive front-end components of the reflectometry system (antennas and WGs) will be directly exposed to the plasma, an effective cooling system is required to keep the operating temperatures below the limits established for the DSC materials under neutron irradiation. Furthermore, the mechanical stresses experienced by the DSC should not jeopardize its structural integrity. In this work, the temperature distributions of a DSC segment with an updated cooling system design were estimated with a coupled steady-state thermal analysis performed with ANSYS Mechanical and ANSYS CFX, using the system-coupling module of ANSYS Workbench. It was found that the maximum temperature obtained in the DSC could be below the limits if the antennas are made of tungsten. These results were used as input in structural analysis, which has shown that the structure of the designed DSC fulfils the level-A requirements of RCC-MR for Immediate Plastic Collapse (IPC), Immediate Plastic Instability (IPI), and Immediate Plastic Flow Localization (IPFL).

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Contributing Institute(s):

1. Plasmaphysik (IEK-4)

Research Program(s):

1. 134 - Plasma-Wand-Wechselwirkung (POF4-134) (POF4-134)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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