A high quality permanent-magnet wiggler for the Rocketdyne/Stanford infrared free electron laser
A high quality permanent-magnet wiggler for the Rocketdyne/Stanford infrared free electron laser
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适用于 Rocketdyne/Stanford 红外自由电子激光器的高质量永磁摆动器
DOI：
10.1016/0168-9002(88)90221-5
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
L. Vintro
中科院分区：
文献类型：
--
作者：
M. Curtin;A. Bhowmik;W. Mcmullin;S. Benson;J. Madey;B. Richman;L. Vintro
为在斯坦福大学光子研究实验室进行的红外自由电子激光（FEL）实验，研制了一台高质量、变间隙、变锥度的永磁摇摆器。讨论了用于组装摇摆器的设计和表征过程。模拟退火代码被用来最大限度地减少在个别磁铁的变化所产生的磁场误差。计算出的电子轨迹与测得的磁场的范围内的不同的操作点的摇摆器。这些图表明在大范围的不同摇摆器操作制度的一个非常高的质量的字段。计算了40MeV电子在3.3kG摇摆器间隙下在2m长摇摆器上的轨道漂移小于25 μm。使用模拟退火代码控制轨迹漂移和光学相位滑移的能力表明未来扩展到极长的摇摆器。
A high quality, variable gap, variable taper, permanent-magnet wiggler has been built for infrared free electron laser (FEL) experiments to be performed at the Stanford Photon Research Laboratory. The design and characterization procedure used to assemble the wiggler is discussed. A simulated annealing code was used to minimize field errors arising from variations in the individual magnets. The computed electron trajectories associated with the measured magnetic fields are presented for a range of different operating points of the wiggler. These plots indicate a very high quality field over a large range of different wiggler operating regimes. Resultant trajectory wander over the 2 m long wiggler for a 40 MeV electron at a wiggler gap corresponding to 3.3 kG was calculated to be less than 25 μm. The ability to control trajectory wander and optical phase slip using the simulated annealing code suggests future extensions to extremely long wigglers.