The Vacuum Vessel Thermal Shield (VVTS) is the barrier that reduces by two orders of magnitude heat loads transferred by thermal radiation and conduction from hot components to magnets and other systems inside the cryostat that operate at 4 .5K. In order to maintain its function during operation, the clearance between VVTS, Toroidal Field Coils (TFC) and Vacuum Vessel (VV), shall be guaranteed. Hence, it is of paramount importance to monitor the gap during the machine assembly phase, when changes in the constraints of the flexible structure may affect the as-built geometries. In particular, after the assembly of the TF coils on the sector module in the Sectors Sub-Assembly Tools (SSAT), accessibility to the VVTS becomes limited to the area of the sector edge. From this stage on, as-built data of the accessible surfaces may not be representative of the full deformed shape. In order to validate the actual measurement strategy, an analysis based on Finite Elements and Morphing Techniques has been carried out.
Pompa, E., Leonard, P., Popa, T., Reccia, L., Biancolini, M.e., D'Amico, G., et al. (2025). Validation of vacuum vessel thermal shield deformation via finite elements and morphing techniques based analysis. FUSION ENGINEERING AND DESIGN, 215 [10.1016/j.fusengdes.2025.114937].
Validation of vacuum vessel thermal shield deformation via finite elements and morphing techniques based analysis
Pompa E.;Biancolini M. E.;
2025-01-01
Abstract
The Vacuum Vessel Thermal Shield (VVTS) is the barrier that reduces by two orders of magnitude heat loads transferred by thermal radiation and conduction from hot components to magnets and other systems inside the cryostat that operate at 4 .5K. In order to maintain its function during operation, the clearance between VVTS, Toroidal Field Coils (TFC) and Vacuum Vessel (VV), shall be guaranteed. Hence, it is of paramount importance to monitor the gap during the machine assembly phase, when changes in the constraints of the flexible structure may affect the as-built geometries. In particular, after the assembly of the TF coils on the sector module in the Sectors Sub-Assembly Tools (SSAT), accessibility to the VVTS becomes limited to the area of the sector edge. From this stage on, as-built data of the accessible surfaces may not be representative of the full deformed shape. In order to validate the actual measurement strategy, an analysis based on Finite Elements and Morphing Techniques has been carried out.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
