GELEM-PES

Photoemission /GELEM-Dipole

The instrument GELEM-PES offers a multi-technique approach for the investigation of the electronic, chemical and structural properties of materials: X-ray photoemission spectroscopy and X-ray absorption in all possible modes (fluorescence yield, total and partial electron yields). It is operated by the German-Eastern European Laboratory for Energy and Materials Research (GELEM).

Having several preparation chambers, fast-load systems, a number of insertion devises such as a flash-machine, evaporators, a cleavage system, a heating stage, a gas-inlet system etc., GELEM-PES is a powerful instrument allowing to study fundamental properties of matter.

The beamline is based on a Plane Grating Monochromator (PGM); it covers wide and continuous photon energy range and is characterised by moderate flux.

Selected Applications:
  • Research addresses electronic, chemical and structural properties of wide variety of materials and covers rather broad field of disciplines, scientific areas and applications: energy materials, conductive polymers for electrochemical applications, compositionally complex alloys, biomimetic materials, etc.
GELEM PES chamber

GELEM PES chamber


Methods

XPS, NEXAFS

Remote access

depends on experiment - please discuss with Instrument Scientist

Instrument data
Phone (~49 30 8062-)
Beam availability 24h/d
Source D16.1 (Dipole)
Monochromator PGM
Energy range (at experiment) tbd
Energy resolution up to 11000 @400 eV
Flux up to 2.5 10e11 photons/s/100 mA
Polarisation horizontal
Focus size (hor. x vert.) 150μm x <100 μm @500 eV, exit slit 210 µm, c = 2.25
Temperature range 110 – 300 K (measurement), 300-2300 K (sample preparation)
Pressure range UHV
Detector
  • A hemispherical electron energy analyzer SPECS PHOIBOS 150
  • Keithley ammeter for sample drain current measurements
  • MCP-detector for NEXAFS measurements in Partial Electron Yield mode
Manipulators For details contact the Instrument Scientist.
Sample holder compatibility Flag-style (Omicron) sample holders
Additional equipment Preparation chamber: mass-spectrometer for mass detections, LEED, evaporators, gas lines, ion sputtering gun, etc.
Ar glove box on site.
Additional information Further details: beamline GELEM-Dipole