FEMTOSPEX surface dynamics

Excited states dynamics with x-rays at UE56_1-PGM

The end station FEMTOSPEX Surface Dynamics enables angle- and time-resolved photoelectron spectroscopy. The acceptance angle of the spectrometer is max. 60 °. The time resolution is given by the pulse length of the X-ray pulses from Bessy. Femtosecond slicing can be used. The pump laser offers a maximum repetition rate of 6kHz with about 1.2mJ per pulse (800nm). The second harmonic (400nm) can be used without any problems. The use of an OPA is also possible.

Anwendungsbeispiele:
  • Core-hole-clock (CHC) Spectroscopy
  • time-resolved Photo Electron Spectroscopy
  • Photo Electron Diffraction
Geslicete und ungeslicete Rohdaten der Au 4f Linien. a) Slicing aus b) Slicing an c) Differenzsignal von a) und b)

Geslicete und ungeslicete Rohdaten der Au 4f Linien. a) Slicing aus b) Slicing an c) Differenzsignal von a) und b)


Methods

Time-resolved absorption, Time-resolved PES

Remote access

not possible

Beamline data
Energy range 60 - 1300 eV
Energy resolution > 100,000 at 64 eV, > 20,000 at 400 eV
Flux 2.5·1011
Polarisation • linear horizontal vertical
• circular
Focus size (hor. x vert.) 85 µm (hor) x 15 µm (vert, dep. on exit slit)
Phone 17980, 17981, 17982
Weitere Details UE56-1_PGM
Station data
Temperature range 20 - 400 K
Pressure range 2 x 10-10 mbar up to 1 x 10-6 mbar
Detector VG Scienta ARTOF EW 60° lens.
Manipulators 5 axis manipulator
Sample holder compatibility Omicron flag style sample holders
Additional equipment 2 sputter guns, Auger-LEED system
Probenvorbereitung Sputter gun, In situ cleaving, gas dosing system, evaporator, quartz balance, electron bombardement heating

Zeitaufgelöste Elektronenspektroskopie an Festkörperoberflächen mit femtosekunden und pikosekunden Laser-Pump/x-ray-Probe -ArTOF Spektroskopie sowie Methodenentwicklung.