Parametric design and optimization of SOLEIL II vacuum chamber thermal properties

THO07
18 Sept 2025, 09:40
20m
The Loop

The Loop

Lund, Sweden
Contributed Oral Presentation FEA methods Simulation session 1

Speaker

Zhengxuan Fan (Synchrotron soleil)

Description

In the context of the upgrade to SOLEIL II, a 4th-generation synchrotron, the use of Multi-Bend Achromat lattices significantly reduces natural emittance but requires smaller vacuum chambers (12–16 mm), leading to higher power density on chamber walls with limited cooling space. In some cases, there is no room for crotch absorbers, and chambers must fit between magnet poles with less than 1 mm clearance. These constraints demand high thermo-mechanical stability, making design highly challenging and and it is often difficult to identify the most efficient direction for further optimization. This paper presents a parametric thermal analysis and optimization method for SOLEIL II vacuum chambers. Simulations are conducted using ANSYS DesignXplorer, with key parameters identified through sensitivity analysis of their impact on thermal performance. The heat-flux map, imported from Synrad+, provides precise power distribution. From multiple parameter combinations, a predictive temperature map (response surface) is generated, enabling estimation of thermal behavior without lengthy simulations. An optimized parameter set is proposed to streamline the design while ensuring performance.

Author

Zhengxuan Fan (Synchrotron soleil)

Co-authors

Marc Ribbens (Synchrotron soleil) Keihan Tavakoli (Synchrotron soleil) Thomas Souské (Synchrotron soleil) Vincent Leroux (Synchrotron soleil) Christian Herbeaux (Synchrotron soleil)

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