UE112_PGM-2b-1^3

UE112_PGM-2b-1^3

This low energy beamline serves the permanent stations for angle-resolved photoelectron spectroscopy, One Cube and One Square ARPES. It is designed to deliver a high flux of photons with very high energy resolution in the range from 5 to 250 eV. In addition to its normal operation with grazing incidence angles, the monochromator also offers a normal incidence option to retain flux and polarization at the lowest energies.

Flux and bandwidth with various gratings

Flux and bandwidth with various gratings


Station data
Temperature range 1 - 50 K
Pressure range For details contact the Instrument Scientist.
More details ARPES One-Cube
Beamline data
Segment H13
Location (Pillar) 14.2
Source UE112 (Elliptical Undulator)
Monochromator PGM 2
Energy range 4 - 200 eV
Energy resolution < 1 meV for E < 100 eV
Flux >1013 (photons/s/0.1%bw/100 mA)
Polarisation • linear any angle
• circular
Divergence horizontal 1 mrad
Divergence vertical 3 mrad
Focus size (hor. x vert.) 250µm x variable (typically ~40µm)
User endstation not possible
Distance Focus/last valve 814 mm
Height Focus/floor level 1757 mm
Beam availability 12h/d
Phone +49 30 8062 14696

The monochromated beam branches into two lines to serve the 12 (left) and 13 (right) setups. The latter has a focus of 250 µm.

For more details and current status contact the Instrument Scientist.