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.
Selected Applications:- Core-hole-clock (CHC) Spectroscopy
- time-resolved Photo Electron Spectroscopy
- Photo Electron Diffraction
Methods
Time-resolved PES, Time-resolved absorption
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 |
| More details | UE56-1_PGM |
| Station data | |
| Temperature range | 20 - 400 K |
| Pressure range | 6 x 11-10 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, Gas Dosing system, Electron bombardement and filament heating |
| Sample Preparation | Sputter gun, In situ cleaving, gas dosing system, evaporator, quartz balance, electron bombardement heating |
Time resolved electronspectroscopy on solid surfaces with femtosecond and picosecond laser-pump/X-ray-probe ArTOF spectroscopy and method development.