XUV double-pulses with femtosecond to 650 ps separation from a multilayer-mirror-based split-and-delay unit at FLASH

Sauppe, M.; Rompotis, D.; Erk, B.; Bari, S.; Bischoff, T.; Boll, R.; Bomme, C.; Bostedt, C.; Dörner, S.; Düsterer, S.; Feigl, T.; Flückiger, L.; Gorkhover, T.; Kolatzki, K.; Langbehn, B.; Monserud, N.; Müller, E.; Müller J.P.; Passow, C.; Ramm, D.; Rolles, D.; Schubert, K.; Schwob, L.; Senfftleben, B.; Treusch, R.; Ulmer, A.; Weigelt, H.; Zimbalski, J.; Zimmermann, J.; Möller T.; Rupp, D.

doi:10.1107/S1600577518006094

Figure 3
Overview of the DESC components. D1, D2, D3: vacuum chambers (upstream to downstream). M1: fixed multilayer mirror installed in an open-loop piezo actuators mirror mount. M2: delay multilayer mirror installed on a closed-loop piezo tip/tilt platform. M3: back-reflecting multilayer mirror installed in an open-loop piezo actuators mirror mount. (1) Granite stone, (2) breadboard on top of granite stone, (3) optical setup for beamline laser, (4) bellow at incident FEL-beam, (5) bellow compensating elongation during bake-out, (6) rail-guided bellow required for lateral offset split-beam in active SDU, (7) ion getter pumps, (8) breadboards on a three-point bearing (on top of chamber breadboards), (9) linear stepper motor for SDU activation, (10) guide rails supporting aluminium board on the top, (11, 12) piezo-driven small linear stages, (13) stepper-motor-controlled long-range delay stage (shown at full delay), (14) piezo-driven short-range delay stage, (15) optical beamsplitter for alignment with the beamline laser, (16) set of filters for attenuation of pump- and probe-beam with a camera for alignment, (17) Ce:YAG and diffusing screen (for beamline laser) with a camera for beam monitoring.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 25| Part 5| September 2018| Pages 1517-1528

https://doi.org/10.1107/S1600577518006094

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