Hard X-ray self-seeding commissioning at PAL-XFEL

Min, C.-K.; Nam, I.; Yang, H.; Kim, G.; Shim, C.H.; Ko, J.H.; Cho, M.-H.; Heo, H.; Oh, B.; Suh, Y.J.; Kim, M.J.; Na, D.; Kim, C.; Kim, Y.; Chun, S.H.; Lee, J.H.; Kim, J.; Kim, S.; Eom, I.; Kim, S.N.; Koo, T.-Y.; Rah, S.; Shvyd'ko, Y.; Shu, D.; Kim, K.-J.; Terentyev, S.; Blank, V.; Kang, H.-S.

doi:10.1107/S1600577519005460

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Figure 1
(a) Schematic layout of the self-seeding implementation at the hard X-ray undulator line of PAL-XFEL; 8 and 12 undulators are currently installed before and after the self-seeding system, respectively. The spaces for additional undulators in the future upgrade are shown in gray. The motion of the diamond crystal is automated for the angular motion of pitch (θ) and yaw (ψ), and for the translational motion of X and Y. (b, c) Photographs of two batches of crystals. (b) C*[100] (left) and C*[110] (right) crystals with thicknesses of 100 µm and 90 µm, respectively, were installed in the first batch. (c) C*[100] (left) and C*[110] (right) crystals with thicknesses of 100 µm and 30 µm, respectively, were installed in another batch. The 30 µm-thick crystal became foggy after the annealing process.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 26| Part 4| July 2019| Pages 1101-1109

https://doi.org/10.1107/S1600577519005460

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