Design of a Superconducting Wiggler for the Saga Light Source Storage Ring
Design of a Superconducting Wiggler for the Saga Light Source Storage Ring
复制标题
Saga光源存储环超导摆动器的设计
DOI：
10.1109/tasc.2010.2090658
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发表时间：
2011
影响因子：
1.8
通讯作者：
M. Abe
中科院分区：
文献类型：
--
作者：
S. Koda;Y. Iwasaki;Y. Takabayashi;T. Kaneyasu;T. Semba;T. Yamamoto;Y. Murata;M. Abe
为同步辐射设施（即佐贺光源）的 1.4-GeV 存储环设计了一种混合三极摆动器，用于产生 4-40 keV 范围内的硬 X 射线。该摆动器由一个峰值场为 4 T 的超导主极和两个峰值场为 1 T 的常导侧极组成。常导侧极用于减少摆动器低温系统的热负荷。采用无制冷剂系统来确保摆动器系统的长期运行稳定性。主极的超导线圈和铁极由吉福德-麦克马洪制冷机通过机械接触进行冷却。为了抑制主磁极的第一和第二场积分，我们设计了具有相对较大的场钳位且没有横向返回磁轭的主磁极。这种杆结构可以有效地抑制由于摆动场引起的梁位移并减少侧杆体积。对摆动器多极场引起的光束效应进行了估计，发现该效应很小或可控。基于这些结果，带有所设计的摆动器的存储环被认为是一种有效的硬X射线源。
A hybrid three-pole wiggler for generating hard X-rays in the range 4-40 keV was designed for the 1.4-GeV storage ring of a synchrotron radiation facility, i.e., the Saga Light Source. The wiggler consists of a superconducting main pole with a peak field of 4 T and two normal-conducting side poles with peak fields of 1 T. The normal-conducting side poles were used to reduce the heat load on the cryogenic system for the wiggler. A cryogen-free system was used to ensure long-term operational stability of the wiggler system. The superconducting coil and iron poles of the main pole are cooled by a Gifford-McMahon cryocooler via mechanical contact. To suppress the first and second field integrals of the main pole, we designed the main pole with relatively large field clamps and with no transverse return yoke. This pole structure was effective in suppressing beam displacement due to the wiggler field and in reducing the side pole volume. The beam effects due to the multipole fields of the wiggler were estimated and were found to be small or controllable. Based on these results, the storage ring with the designed wiggler is considered to be an effective hard-X-ray source.