Standing Wave High Energy Linear Accelerator Structures

TLDR

The paper describes the design and operation of resonant linear accelerator tanks for high‑energy proton and electron linacs. The authors derive theoretical expressions and present experimental data for cavity chains operating in π/2 mode, including the synthesis of a side‑coupled biperiodic chain that combines high acceleration efficiency with field stability and its extension to nonperiodic chains. They show that π/2‑mode tanks exhibit extraordinary field stability and that this mode can be extended to nonperiodic chains.

Abstract

The design and operation of resonant linear accelerator tanks suitable for use in high energy proton and electron linacs is described. It is shown that construction of these tanks to operate in the π/2 mode yields systems with extraordinary field stability. Theoretical expressions and corresponding experimental observations are obtained for the behavior of cavity chains operating in the π/2 mode. The synthesis of the side coupled cavity chain, a biperiodic chain which combines high acceleration efficiency with π/2 mode field stability, is described. Extensions of π/2 mode operation to nonperiodic chains is also demonstrated.