Robust Permanent Magnet Beam Delivery Systems for Medical Radiotherapy Linacs

该提案是设计用于放射治疗的线性电子加速器倡议的一部分，该倡议将对所有子系统进行优化，以确保其坚固、可靠、具有成本效益并适合在包括发展中国家在内的具有挑战性的环境中使用。该项目旨在设计一种光束传输系统（磁聚焦和转向），该系统使用永磁体的现代功能，以确保以最小的损失将高质量的电子束从源带到x射线产生目标。用永磁体取代部分或全部现有的电磁铁应能使无需维护的聚焦系统成为可能，这种系统只需要很少的电力，这已被强调为在官方发展援助国家提供这种技术的障碍。（一些更小，更便宜，可更换的可调节电磁铁将包括微调，这将有最小的电力需求。）

This proposal forms part of an initiative to design a linear electron accelerator for radiotherapy where all subsystems will be optimised to ensure it is robust, reliable, cost effective and appropriate for use in challenging environments including developing countries. This project aims to design a beam delivery system (magnetic focusing and steering) which uses modern capabilities in permanent magnets to ensure that a high-quality electron beam can be taken from the source to the x-ray generating target with minimal losses. Replacing some or all of the existing electromagnets with permanent magnets should enable a maintenance-free focusing system which requires very little electricity, which has been highlighted as a barrier to providing this technology in ODA countries. (A few smaller, cheaper and replaceable adjustable electromagnets will be included for fine tuning, which would have minimal power requirements.)