Fig. 1. Calculated (a) energy and (b) brilliance for odd harmonics as a function of the undulator K-value (a target ring current of 300 mA is used). 储存环流强为300 mA时, 不同波荡器K值下, 计算得到不同奇次谐波的(a)能量和(b)亮度分布

Fig. 2. Beamline layout of the coherent scattering experimental modes on BL19U2: (a) Side view, vertical direction; (b) top view, horizontal direction.相干衍射实验模式@BL19U2光束线站布局图　(a)侧视图, 垂直方向; (b)上视图, 水平方向

Fig. 3. (a) Schematic diagram of experimental equipment; (b) on-site picture.(a)实验装置示意图; (b)现场照片

Fig. 4. (a), (b) Measured diffraction patterns of pinhole with incident beam of reduced coherence; diffracted intensity distribution in the horizontal (c) and vertical (d) direction along the dotted line profile in panel (a) and (b), and the intensity distribution are shown in log scale.(a), (b)不同入射光束相干度下的针孔衍射图样; (c)水平和(d)垂直方向上的衍射强度分布(图(a), (b)中白色虚线位置); 强度分布均为对数显示

Fig. 5. Coherent diffraction pattern (a), reconstruction (b) and SEM image (c) of pinhole.针孔样品的(a)相干衍射图, (b) 结构重建图, (c)扫描电镜图

Fig. 6. (a) The 441st diffraction pattern collected by the detector; recovered (b) amplitude and (c) phase information of the sample structure of the Fresnel zone plate according to the diffraction patterns; (d) electron microscope image of the corresponding structures of the wave band specimens; reconstructed (e) amplitude and (f) phase information of the incident beam simultaneously according to the diffraction pattern.(a)探测器采集到的第441张衍射图; 根据衍射图重建波带片样品结构的(b)振幅和(c)相位信息; (d)波带片样品相应结构的电子显微镜图片; 根据衍射图重建的入射光束的(e)振幅和(f)相位信息

Table 1. Well-known coherent scattering beamlines in the world.

Table 2. Photon energy and highest brilliance/flux/coherent flux with corresponding undulator parameters (a target ring current of 300 mA is used).

Table 3. Beam parameters of BL19U2 (@12 keV) at the source and KB mirrors.