GELEM Dipole

German-Eastern European Laboratory for Energy and Materials Research Dipole

The former RGBL Dipole beamline is now operated by the German-Eastern European Laboratory for Energy and Materials Research (GELEM). The beamline is based on a Plane Grating Monochromator (PGM); it covers wide and continuous photon energy range and is characterised by moderate flux. It ends with a fixed experimental station GELEM-PES that 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).

Optical layout of the GELEM dipole Beamline. [Gorovikov et al., Nucl. Instrum. Methods Phys. Res. A: Accel. Spectrom. Detect. Assoc. Equip. 467–468 (2001) 565-568]

Optical layout of the GELEM dipole Beamline. [Gorovikov et al., Nucl. Instrum. Methods Phys. Res. A: Accel. Spectrom. Detect. Assoc. Equip. 467–468 (2001) 565-568]


Station data
Temperature range 110 – 300 K (measurement), 300-2300 K (sample preparation)
Pressure range UHV
More details GELEM-PES
Beamline data
Segment L16
Location (Pillar) 1.2
Source D16.1 (Dipole)
Monochromator PGM
Energy range 80 - 1500 eV
Energy resolution up to 11000 @400 eV
Flux up to 2.5 10e11 photons/s/100 mA
Polarisation horizontal
Divergence horizontal -- mrad
Divergence vertical -- mrad
Focus size (hor. x vert.) 150μm x <100 μm @500 eV, exit slit 210 µm, c = 2.25
User endstation not possible
Distance Focus/last valve 820 mm
Height Focus/floor level 1400 mm
Beam availability 24h/d
Phone (030) 8062 - 13433

The operation of the Russian-German Joint Laboratory at BESSY II is suspended for an undetermined period of time due to the Russian Federation's war of aggression against Ukraine. We condemn the serious breach of international law. We are concerned for all inhabitants of Ukraine and for the researchers and students affected by the war. We remain in solidarity with them.