Speaker
Description
The utmost design freedom of additive manufacturing can be leveraged to fabricate complex particle accelerator components, such as the radiofrequency quadrupole (RFQ). However, the high surface roughness typical of as-printed parts represents a major barrier to the integration of additive manufacturing technologies into established fabrication workflows. This work investigates finishing processes aimed at improving the surface quality of additively manufactured RFQ components, with a focus on the hard-to-access vane tip region. A dedicated mock-up was developed, consisting of a copper vane representing a one-quarter RFQ section, mounted in a plastic holder to replicate the full part. This setup allows the copper part to be removed after each treatment step to measure material removal and assess effects on vane modulation, surface roughness, and overall geometric accuracy. Both mechanical mass finishing with abrasive media and chemical polishing were examined, applying each treatment in multiple intermediate steps. Comprehensive surface characterization was conducted after each finishing stage by means of profilometry, 2D and 3D roughness measurements, and 3D scanning to determine correlations between process parameters and resulting surface quality. The objective is to develop an optimed finishing strategy capable of achieving the surface quality and geometric accuracy required by RFQ and other advanced particle accelerator components.
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