Speaker
Description
Herewith, we present the optical design of the «Structural Diagnostics» beamline developed for a fourth generation synchrotron radiation (SR) source SRF “SKIF”. The multi section beamline is based on a superconducting undulator (see table below) and will have a total of 4 experimental instruments, three will use fixed energy side branches and the fourth one located on the straight section will have the option of wide energy spectrum. A variety of diffraction experiments can be accomplished simultaneously at this beamline thanks to such a design. The four aforementioned sections are: High-resolution powder diffraction (straight section 1-2-1); In situ diffraction (side section 1-2-2); Single-crystal X-ray diffraction (side section 1-2-3); Small angle X-ray scattering (side section 1-2-4).
Table. Main machine parameters
Energy [GeV] - 3
Circumference [m] -476
HF [MHz] - 178.47
Horizontal emittance [pm.rad] - 75
Coupling constant [%] - 10
Beam current [mA] - 400
No. of bunches - 510
βx, βy [m] - 13, 1.9
Table. Main undulator parameters
Peak field B0 [T] 1.25
Period length λU [mm] 15.6
Minimum magnetic gap [mm] 8
Magnetic Length L [mm] ~1997
Total power Ptot (B=1.25 T, I=0.4 A, E=3 GeV) [kW] 7.18
On-axis power density (B=1.25 T, I=0.4 A, E=3 GeV) [kW/mrad2] 50
Acknowledgements
The work was supported by Ministry of Science and Higher Education of the Russian Federation (grant No. АААА-А19-119020890025-3).
