Dielectric wall accelerator

A dielectric wall accelerator (DWA) is a compact linear particle accelerator concept designed and patented in the late 1990s, that works by inducing a travelling electromagnetic wave in a tube which is constructed mostly from a dielectric material. The main conceptual difference to a conventional disk-loaded linac system is given by the additional dielectric wall and the coupler construction.

Source: Wikipedia — Dielectric wall accelerator (CC BY-SA 4.0)