HIS 14 HD: Focused high density VUV source

-Application examples-



1. μ-ARPES:

Real space and
k-space NanoESCA images taken on a poly crystalline silver sample excited by focused HeI excitation.
Real Space (left): FoV 38μm, E-Ef = 4.5eV (Hg source)
K-space (right): FoV 4.1Å
-1, E-Ef 21.2eV (HIS 14 HD)
Find more about k-space imaging
here.






2. Measurements of the spot size using PEEM:

Using our PEEM we derived the spot profile/diameter of the VUV beam on the sample (silver). The elliptical shape is because of the grazing angle of about 25° what is applied with the PEEM. Taking this into account we get a round spot with a diameter of about 290µm.




3. Comparison of the S/N-ratio of k-space images (PEEM):

Sample: Ag(111)
HeI excitation (21.2 eV)
E-E
f = 15.5 eV



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