Soft X-ray fs-to-ps pulsed undulator radiation with variable polarization for FEMTOSPEX-DynaMax
The ZPM (zone plate monochromator) was particularly designed and commissioned according to user requirements to support optical pump - soft x-ray probe experiments at the FemtoSpeX facility at the UE56-1.
|Temperature range||20 – 350 K in standard configuration (for higher or lower temperatures, please contact the instrument scientists)|
|Source||UE56-1 slicing (Elliptical Undulator)|
|Monochromator||Reflection Zone Plate Arrray (RZPA)|
|Energy range||400 - 1500 eV; 1800 eV|
|Flux||1·106 ph/sec/0.1%BW@6kHz (100 fs pulses)|
|Divergence horizontal||0.2 mrad|
|Divergence vertical||0.1 mrad|
|Focus size (hor. x vert.)||typ. 140 µm x 50 µm (slit)|
|Distance Focus/last valve||800 mm|
|Height Focus/floor level||1763 mm|
|Phone||+49 30 8062-14715|
Owing to the principles of generating 100 fs x-ray pulses from a storage ring  one needs optics of highest possible transmission up to 21%. A successful approach has been a single element monochromator based on Reflection Zone Plates . The current design as depicted in Figure 1 (right) consists of 9 lenses that enable a working range from 410 to 1333 eV at moderate spectral resolutions of E/DE= 500 or, in one case E/DE = 2000, at 713 eV. The optics is tailored to minimize pulse elongations to 30 fs preserving the polarization properties of the elliptical light from the undulator.
References / Latest Publications
 Khan, S., Holldack, K., Kachel, T., Mitzner, R. & Quast, T., Phys. Rev. Lett. 97, 074801 (2006).
 Brzhezinskaya, M, et al. Journal of Synchrotron Radiation 20, 522-530 (2013).
 Stamm, C. et al., Nature Materials 6, 740–743 (2007).
 Boeglin, C. et al., Nature 465, 458–462 (2010).
 Wietstruk, M. et al., Phys. Rev. Lett. 106, 127401 (2011).
 Radu, I. et al., Nature 472, 205–209 (2011).
 Eschenlohr, A. et al., Nature Materials 12, 332–336 (2013).
 Bergerard, N. et al. Nature Communications, 5, 3466, doi:10.1038/ncomms4466.