Systems and methods of varying charged particle beam spot size

摘要

Methods and devices enable shaping of a charged particle beam. A modified dielectric wall accelerator includes a high gradient lens section and a main section. The high gradient lens section can be dynamically adjusted to establish the desired electric fields to minimize undesirable transverse defocusing fields at the entrance to the dielectric wall accelerator. Once a baseline setting with desirable output beam characteristic is established, the output beam can be dynamically modified to vary the output beam characteristics. The output beam can be modified by slightly adjusting the electric fields established across different sections of the modified dielectric wall accelerator. Additional control over the shape of the output beam can be excreted by introducing intentional timing de-synchronization offsets and producing an injected beam that is not fully matched to the entrance of the modified dielectric accelerator.

主权项

1. A charged particle accelerator system comprising:
a dielectric wall accelerator (DWA) including:
a high gradient lens section that transports a charged particle beam and controls a beam spot size of the charged particle beam;a main DWA section that accelerates the charged particle beam, wherein the high gradient lens section and the main DWA section comprise a series of alternating layers of insulators and conductors with a hollow center, the series of alternating layers stacked together to form a single high gradient insulator (HGI) tube to allow propagation of the charged particle beam through the hollow center of the HGI tube;a plurality of transmission lines connected to the high gradient lens section;a plurality of transmission lines connected to the main DWA section; andone or more voltage sources configured to supply an adjustable voltage value to each transmission line of the plurality of transmission lines connected to the high gradient lens section and the main DWA section to establish an adjustable electric field profile.