SBIR Phase I: Design and Construction of Large Permanent Magnet Dipoles

本小企业创新研究第一阶段项目是研究设计大型，高精度，高场（1.8 T）铁轭/稀土（电荷片等效材料）偶极磁铁。 已经设计的少数大型永久偶极磁体使用传统的电磁体技术，因此具有不令人满意的大寄生磁通和0.3T的低间隙磁场。 在第一阶段，将为磁体开发一般设计和施工方法。作为原理的证明，这些技术将应用于1 T可调间隙场“盒”偶极子与反向边缘场的移动的70 MeV RaceTrack Microtron使用尽可能小的磁铁。 提出了四项任务：（1）完善大型CSEM偶极子设计;（2）开发场误差测量和校正方法;（3）开发边缘场整形方法;（4）找到热稳定CSEM的方法。 TOSCA和MAFIA计算机模拟将用于验证设计。 大型高场CSEM偶极子可用于工业和研究加速器、光束传输线和光谱仪，因为它们具有比类似电磁偶极子更简单的结构和上级性能。 消除磁体线圈以及它们的电源和冷却系统降低了电力消耗、建造成本、维修费用、控制系统复杂性和空间要求，同时提高了可靠性。

This Small Business Innovation Research Phase I project is for research to design large, high precision, high field ( 1.8 T) iron-yoke/rare-earth (Charge Sheet Equivalent Material) dipole magnets. The few large permanent dipole magnets that have been designed have used traditional electromagnet techniques and so have unsatisfactorily large parasitic flux and low gap fields of 0.3 T. General design and construction methodology will be developed for the magnets during Phase I. As proof of principle, these techniques will be applied a 1 T tunable gap field 'box' dipole with reversed fringe field for a mobile 70 MeV RaceTrack Microtron using the smallest magnets possible. Four tasks are proposed: (1) Perfect the large CSEM dipole design; (2) Develop field error measurements and correction methods; (3) Develop fringe field shaping methods; and (4) Find a method to thermally stabilize the CSEM. TOSCA and MAFIA computer simulations will be used to verify the design. Large high-field CSEM dipoles can be used in industrial and research accelerators, beam transport lines, and spectrometers, as they have simpler construction and superior performance than similar electromagnetic dipoles. Eliminating the magnet coils, as well as their power supplies and cooling systems, reduces the electrical power consumption, construction costs, servicing expense, control system complexity, and space requirements, while increasing the reliability.