The HEPS project.
The HEPS project.
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DOI：
10.1107/s1600577518012110
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发表时间：
2018-11-01
影响因子：
2.5
通讯作者：
Qin Q
中科院分区：
文献类型：
--
作者：
Jiao Y;Xu G;Cui XH;Duan Z;Guo YY;He P;Ji DH;Li JY;Li XY;Meng C;Peng YM;Tian SK;Wang JQ;Wang N;Wei YY;Xu HS;Yan F;Yu CH;Zhao YL;Qin Q
介绍了我国即将建成的6 GeV绿场衍射极限储存环光源--高能光子源的详细情况。高能光子源（HEPS），一个6 GeV的绿场衍射限制存储环光源，将在中国北京建造。 HEPS设计已经发展了大约十年，现在已经大部分完成并准备施工。储存环基于改进的混合七弯消色差仪（7 BA）设计，采用具有反向弯曲角和纵向梯度的弯曲磁体，实现34.2 pm的超低自然发射度，周长为1360.4 m。 在改进的混合7 BA的中间的偶极子的中心切片，具有柔性磁场，被用作弯曲磁体束线的源。此外，交替的高β和低β部分是专门设计的，以产生和提供具有5 × 1022光子s−1 mm−2 mrad−2（0.1%带宽）−1的高亮度的X射线同步辐射。 在这里，HEPS存储环的设计和解决方案，在这种超低发射度设计固有的挑战。
Details of the High Energy Photon Source (HEPS), a 6 GeV green-field diffraction-limited storage ring light source to be built in China, are presented. The High Energy Photon Source (HEPS), a 6 GeV green-field diffraction-limited storage ring light source, will be built in Beijing, China. The HEPS design has been evolving for about ten years, and is now mostly finished and ready for construction. The storage ring is based on a modified hybrid seven-bend achromat (7BA) design, where bending magnets with reverse bending angles and longitudinal gradients are adopted to reach an ultralow natural emittance of 34.2 pm with a circumference of 1360.4 m. The central slice of the dipole in the middle of the modified hybrid 7BA, with flexible magnetic field, is used as the source of the bending-magnet beamline. Moreover, alternating high- and low-beta sections are specially designed to generate and deliver X-ray synchrotron radiation with high brightness of 5 × 1022 photons s−1 mm−2 mrad−2 (0.1% bandwidth)−1. Here, the HEPS storage ring design and solutions to the challenges inherent in this ultralow-emittance design are presented.