Other
The Infancy of Particle Accelerators
An autobiography of Rolf Wideroe, an important figure in the development of accelerators. Many mentions of betatrons are made in the introduction and chapters 6, 7, 10 and 11. The site includes some technical information.
Other
Desy: Aachen the First Operational Linac
A chapter of an autobiography of Rolf Wideroe, an important figure in the development of accelerators. This chapter discusses the first linear accelerator.