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Figure 2
A schematic drawing of the pump–probe experimental setup at the SwissMX endstation at the SwissFEL Cristallina experimental station. The pump laser (yellow) is coupled to the sample position via the endstation's OAV system. An exchangeable dichroic mirror (light green) enables different pump wavelengths to be reflected whilst transmitting light for the chip alignment into a camera (not shown in this diagram). The X-rays pass through the centre of the drilled objective and prism of the final part of the laser coupling. Air scatter from the X-rays is minimized using pre- and post-sample scatter guards. The blue box highlights an area of the chip showing a 1:1 interleaved light:dark scheme, where X-rays are delivered to every well and laser pumps only to every other.

IUCrJ
Volume 11| Part 5| September 2024| Pages 749-761
ISSN: 2052-2525
https://doi.org/10.1107/S2052252524005591