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27 June 2006Selecting the electromagnetic actuator of the ELT primary mirror
The segmented, adaptive primary mirror of the ELT is the most delicate optical component of the telescope. Its full-adaptive
operational modes require an high bandwidth actuation system, able to provide large and precise stroke motions.
As the core component of the actuation system hardware, the electromagnetic device has to be accurately designed. This
paper depicts the preliminary electromagnetic study of the actuator. After a discussion of the chosen concept, the design
process and the computational approach are illustrated. The goal of the study is the definition of the basic geometrical and
physical parameters which allow the minimization of the power dissipated to deliver the proper actuation force, in order to
reduce the local overheating in the telescope optical path.
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Ciro Del Vecchio, Fabrizio Marignetti, Armando Riccardi, Maurizio Scarano, Piergiacomo Cancelliere, "Selecting the electromagnetic actuator of the ELT primary mirror," Proc. SPIE 6272, Advances in Adaptive Optics II, 62724Y (27 June 2006); https://doi.org/10.1117/12.671372