Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
Research Center for Electron Photon Science, Tohoku University, 1-2-1 Mikamine, Taihaku-ku, Sendai, Miyagi 982-0826, Japan.
J Synchrotron Radiat. 2019 Nov 1;26(Pt 6):1902-1910. doi: 10.1107/S1600577519013031. Epub 2019 Oct 22.
A novel method to fabricate undulator magnets of a-few-millimetre-period length is being explored. Plate-type magnets, 100 mm-long with 4 mm-period length, have been successfully fabricated. They produce an undulator field of approximately 3 kG at a gap of 1.6 mm. Prototype undulators based on this technology have been constructed. Field measurements and characterization show that the quality of the undulator field of these plate magnets is sufficient for an undulator light source, and the calculated spectrum shows that the fundamental radiation emitted from this field is quite satisfactory. Test experiments for light generation using a real electron beam have been carried out at a test accelerator at the Research Center for Electron Photon Science (ELPH), Tohoku University, Japan, which is able to realize optics conditions to accept a very short gap of ∼1.6 mm. First observation and characterization of blue light was successfully accomplished.
一种制造亚毫米周期长度的摆动磁铁的新方法正在探索中。已经成功制造出了 100mm 长、4mm 周期长度的板式磁铁。它们在 1.6mm 的间隙下产生了大约 3kG 的摆动场。基于这项技术的原型摆动器已经构建。磁场测量和特性表明，这些板磁铁的摆动场质量足以满足摆动光源的要求，并且计算出的光谱表明，从这个场中发射的基本辐射非常令人满意。在日本东北大学电子光子科学研究中心（ELPH）的测试加速器上进行了使用真实电子束产生光的测试实验，该加速器能够实现接受非常短的间隙（约 1.6mm）的光学条件。已经成功完成了对蓝光的首次观察和特性研究。
