I recommend these videos to learn the basics for technoloy and science of Accelerator.
Vacuum Systems. Prof. V.Baglin
RFCavityDesignCAS Darmstadt ’09 — RF Cavity Design Erik Jensen
Accelerators for Beginners and the CERN Complex Rende Steerenberg, CERN
Basic Maths and Units R.Steerenberg.mp4
Seminario aceleradores.Fernando Toral PDF
Thanks for the CERN Community people for sharing these video and docs.