Paul Scherrer Institut, Villigen 5232, Switzerland.
DESY, Notkestrasse 85, 22607 Hamburg, Germany.
J Synchrotron Radiat. 2019 Nov 1;26(Pt 6):2081-2085. doi: 10.1107/S1600577519013237. Epub 2019 Oct 23.
The transmission of the optical components of the Bernina branch of the Aramis beamline at SwissFEL has been measured with an X-ray gas monitor from DESY and compared with a PSI gas detector upstream of the optical components. The transmission efficiencies of the Mo, Si and SiC mirror coatings of the Aramis beamline and the various other in-beam components were evaluated and compared with theoretical calculations, showing an agreement of 6% or better in all cases. The experiment has also shown the efficacy of the high-harmonic rejection mirrors at the Bernina branch of the Aramis beamline at SwissFEL, and characterized the transmission efficiency of the on-line spectrometer in the Aramis beamline. The theoretical transmission of the mirror coatings match the experimental data to within 7%. The accuracy of these measurements was checked against a radiative bolometer from a Japanese collaboration and found to agree to a level of 4% or better. Further comparisons with a diamond detector from a US-based inter-institute collaboration demonstrated a good agreement for the attenuator settings of the beamline.
瑞士光源阿马里斯光束线伯尔尼分支出射光学元件的传输已经使用来自德国电子同步加速器研究中心的 X 射线气体监测器进行了测量，并与光学元件上游的瑞士保罗谢勒研究所气体探测器进行了比较。评估了阿马里斯光束线的 Mo、Si 和 SiC 镜涂层以及其他各种光束内组件的传输效率，并与理论计算进行了比较，所有情况下的吻合度都在 6%或更好。该实验还展示了瑞士光源阿马里斯光束线伯尔尼分支出的高次谐波抑制镜的功效，并对阿马里斯光束线在线光谱仪的传输效率进行了特征描述。镜涂层的理论传输与实验数据吻合度在 7%以内。这些测量的精度通过与日本合作的辐射热测量计进行了检查，结果表明吻合度在 4%或更好。与来自美国机构间合作的钻石探测器的进一步比较表明，光束线的衰减器设置具有良好的一致性。
