Beam acceleration device, electron linear accelerator, and control method

Abstract

This application discloses a beam acceleration device, an electron linear accelerator, and a control method, belonging to the technical field of particle accelerators. The beam acceleration device includes n-segment acceleration structures and a microwave feed port. This application forms a composite system with different inter-segment operating modes by electromagnetically coupling the n-segment acceleration structures. By adjusting the frequency of a single microwave feed port, specific inter-segment operating modes are selectively excited, allowing for changes in the field distribution between segments while maintaining a constant relative acceleration field distribution within each acceleration segment. Therefore, while maintaining a constant field distribution in the first acceleration segment, the energy distribution of subsequent segments can be altered, achieving rapid beam energy adjustment at different energy levels while ensuring stable beam quality. This invention achieves millisecond-level rapid switching through purely electronically controlled frequency adjustment, eliminating the need for mechanical moving parts, resulting in a simple and reliable structure; requiring only a single power source, significantly reducing system cost, power consumption, and size; and simultaneously ensuring stable beam quality at each energy level.

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