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Description
The development of the Siam Photon Source II (SPS-II), a fourth-generation light source, represents a significant leap in Thailand’s synchrotron infrastructure. A primary objective of the project is the establishment of domestic technical expertise and industrial capability for producing high-precision vacuum components. This paper details the manufacturing and geometric validation of two critical aluminum alloy prototypes: a straight-section chamber and a bending chamber.
Key technological advancements include the optimization of domestic aluminum extrusion processes to achieve ultra-high vacuum (UHV) surface requirements and the implementation of oil-less, ethanol-cooled CNC machining to eliminate hydrocarbon contamination while maintaining high precision. A comprehensive metrology framework, utilizing laser trackers and high-resolution profiling, was employed to characterize manufacturing-induced distortions. Results confirm that the integrated fabrication workflow, which combines specialized internal fixturing and multi-pass TIG welding, successfully maintains the stringent geometric tolerances required for the storage ring. This work validates the technical readiness of Thailand’s industrial sector for the full-scale production of the SPS-II vacuum system.
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