This is the course material for class in RF fields used for particle accelerators, given at a CERN Particle Accelerator school.
Note the very important characteristics of this course. You'll see the beginning of the material looking like a typical E&M course for a physics major. But later on, you'll see the applications of it the way an electrical engineer would see it. This is a clear example of what I've been trying to emphasize so far, that this is one of those fields where physics and engineering smoothly merge! It is why the field of accelerator physics is one of the few areas of physics that still has a higher hiring rate and why graduates can find a wide-range of jobs to apply for beyond just academia.