DEL VECCHIO, CiroCiroDEL VECCHIOAGAPITO, GuidoGuidoAGAPITOTommasi, G.G.TommasiDe Santis, E.E.De Santis2023-01-202023-01-202010http://hdl.handle.net/20.500.12386/32947The next-generation of Extremely Large Telescopes adaptive optics systems require high-order, long-stroke, quite large deformable mirrors. Higher forces and greater actuator densities than the ones provided by the current technology are needed, still maintaining the severe accuracy and bandwidth requests. Based on a very simple magnetic circuit, providing a compact device, the VRALA actuator accomplishes this very demanding goal. With an efficiency of about 7 N/W and an overall radius that allows actuator separations as low as 25 mm, the deformable mirror can be actuated with large forces on small spatial scales, with a little thermal impact, and/or its thickness can be increased, in order to simplify the manufacturing.ELETTRONICOenConference paperhttps://www.comsol.com/paper/download/63216/del_vecchio_paper.pdfhttps://www.comsol.com/paper/modeling-vrala-the-next-generation-actuator-for-high-density-tick-secondary-mirr-8798FIS/05 - ASTRONOMIA E ASTROFISICA