UE112_PGM-1

UE112_PGM-1 Undulator PGM variable polarisation

The low-energy high-flux beamline UE112_PGM-1 is without permanent experimental chamber and therefore open to flexible end stations.

location at BESSY II

location at BESSY II

beam spot - ca. 0.08 x 0.08 mm (without halo)

beam spot - ca. 0.08 x 0.08 mm (without halo)

Beamline setup

Beamline setup

Absolute Flux Curve (2013/2014, log scale)

Absolute Flux Curve (2013/2014, log scale)

List of publications
Beamline data
Segment H13
Location (Pillar) 15.1
Source UE112
Monochromator PGM
Energy range 8 - 690 eV; for extreme values (<50 eV or >400 eV) contact the beamline crew
Energy resolution 30,000 (20-150eV)
> 20,000 (150-350eV) (standard grating)
Flux > 2x1012 ph/s (20-280eV)
ca. 4x1013 ph/s (50-150eV) (standard grating)
Polarisation variable
Divergence horizontal 1.4 @ 63.5eV mrad
Divergence vertical 0.6 @ 63.5eV mrad
Focus size (hor. x vert.) optimum: ca. 0.08 x 0.08 mm (without halo)
Distance Focus/last valve ca. 1068 (dist. from the CF40 centering flange ca. 1003) mm
Height Focus/floor level ca. 1396.5 (1393 mm at refocus-chamber exit) mm
Free photon beam available yes
Fixed end station no
Beam available 12h/d
Phone +49 30 8062 14836
Polyimid foil (150 nm thick) Suppression at about 10 to 80 eV (foil installed)
Al foil (150 nm thick) Suppression at E > 73 eV (and < 15 eV) (foil installed)
Mg foil (240 nm thick) Suppression at E > 50 eV (and < 11 eV) (foil installed)
low-energy suppression Suppression of photon energies slightly above 21 eV, requires user installation of absorption foils. Materials such as Europium (Eu) or Neodymium (Nd) are suggested for this case.