U41-PEAXIS

PEAXIS - Combined RIXS and XPS

U41-PEAXIS beamline is one of the highest flux beamlines at BESSY II. It provides highly focused soft X-rays, thanks to the ellipsoidal refocusing mirror. The beamline is connected to a fixed endstation PEAXIS that is dedicated to studies of angle-resolved RIXS (Resonant Inelastic X-ray Scattering) and PES (PhotoElectron Spectroscopy) on solids.

Beamline layout

Beamline layout


Station data
Temperature range 20 ~ 1000 K
Pressure range 10-8 ~ 10-9 mbar
Weitere Details PEAXIS
Beamline data
Segment L06
Location (Pillar) 7.2
Source U41 (Undulator)
Monochromator 800 l/mm PGM
Energy range 180 eV - 1600 eV (RIXS: 200 eV - 1200 eV)
Energy resolution E/ΔE@400 eV: 6500 to 14000
E/ΔE@867 eV: 5500 to 9500
(depending on setup)
Flux photons (s-1 (250 mA ring current)-1) at sample:
@400 eV: 1.4*1012 to 2.4*1011
@900 eV: 4.6*1011 to 7.7*1010
(depending on setup)
Polarisation horizontal
Divergence horizontal -- mrad
Divergence vertical -- mrad
Focus size (hor. x vert.) 15 µm x 4 µm
User endstation not possible
Distance Focus/last valve 750 mm
Height Focus/floor level 1410.6 mm
Beam availability 12h/d
Phone (030) 8062-13154
Photon flux at the exit slit. The flux at the sample position is roughly half of it.

Photon flux at the exit slit. The flux at the sample position is roughly half of it.

Beamline resolution @ 401 eV

Beamline resolution @ 401 eV

Beamline resolution @ 867 eV

Beamline resolution @ 867 eV

Focal spot @ 400 eV and slit 20 µm

Focal spot @ 400 eV and slit 20 µm