UE49_PGM SPEEM

UE49 SPEEM

The UE49-PGMa beam line hosts a dedicated photo-electron emission microscope (PEEM) devoted to element-selective and magnetic-sensitive space resolved investigations. For a detailed description of the PEEM as well as for an overview of the experimental possibilities of our microscope, please visit the following link XPEEM.

At typical working conditions of the microscope the field of view is about 3 –10 µm. Therefore the highest possible photon flux within the field of view of the microscope is necessary in order to achieve high spatial resolution and maximize the collection efficiency. 

The UE49-PGMa beam line allows full polarization control of the incoming beam-delivering light of circular, elliptical and horizontal polarization- in combination with a high transmittance and a careful refocusing of the photon beam. A dedicated elliptical refocusing mirror has been designed to achieving a foot print of the incoming x-ray beam on the sample of 10 μm (vertical) X 20 μm (Horizontal).

The spectral range covered extends from 80 to 1800 eV, with a spectral resolution of 10000 at 700 eV. The photon flux delivered into the focused spot ranges from 10e-11 to 10e-13 ph/s/100 mA.

Beam line layout

Beam line layout

Photon flux and resolution for Circ. Pol. light

Photon flux and resolution for Circ. Pol. light

Photon flux and resolution for Lin. Hor. light

Photon flux and resolution for Lin. Hor. light

Photon flux and resolution for Lin. Ver. light

Photon flux and resolution for Lin. Ver. light

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Beamline data
Segment L08
Location (Pillar) 9.2
Source UE49 (Elliptical Undulator)
Monochromator PGM
Energy range 100 - 1800 eV
Energy resolution 10000 at 700 eV
Flux 1e11 - 1e13
Polarisation variable
Divergence horizontal 2.3 mrad
Divergence vertical 0.79 mrad
Focus size (hor. x vert.) 10 μm (vertical) X 20 μm (Horizontal) at sample position
Fixed endstation SPEEM
Flexible endstation(s) no
User endstation not possible
Distance Focus/last valve 500 mm
Height Focus/floor level 1379 mm
Beam availability 12h/d
Phone +49 30 8062 14750