Kinjo Ryota, Kagamihata Akihiro, Seike Takamitsu, Kishimoto Hikaru, Ohashi Haruhiko, Yamamoto Shigeru, Tanaka Takashi
RIKEN SPring-8 Center, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, Japan.
JASRI/SPring-8, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, Japan.
Rev Sci Instrum. 2017 Jul;88(7):073302. doi: 10.1063/1.4991652.
A lightweight-compact variable-gap undulator (LCVGU) having the force-cancellation system based on the multipole monolithic magnets (MMMs) has been developed. The LCVGU is free from the heavy mechanical frames, which is a fundamental element specific to conventional variable-gap undulators (VGUs) because of a strong attractive force, and thus the cost and time for construction and installation are expected to be significantly reduced; the MMMs counteract the strong attractive force in a cost-effective manner. Results of mechanical tests and magnetic-field measurements of two prototype LCVGUs equipped with the proposed force cancellation system have revealed the comparable performance with the conventional VGUs.
一种基于多极单片磁体（MMM）的具有力抵消系统的轻型紧凑可变间隙波荡器（LCVGU）已被开发出来。LCVGU无需笨重的机械框架，而由于强大的吸引力，机械框架是传统可变间隙波荡器（VGU）特有的基本元件，因此预计可显著降低建造和安装的成本及时间；MMM以经济高效的方式抵消强大的吸引力。对配备了所提出的力抵消系统的两个LCVGU原型进行的机械测试和磁场测量结果表明，其性能与传统VGU相当。
