Archives of presentations and papers
There’s an enormous wealth of information in the links below, although it may take a bit of searching. Seminal papers or presentations will be linked directly eventually, but for now here are the sources:
U.S. Particle Accelerator School materials page – many excellent presentations from the classes
Joint Accelerator Conferences Proceedings archive
Online Books
Iron Dominated ElectromagnetsDesign, Fabrication, Assembly and Measurements, Jack Tanabe
Particle Accelerator Physics, 4th edition, Helmut Wiedemann
Principles of Charged Particle Acceleration, Stanley Humphries, Jr.