Next Generation Electron Momentum Spectrometer for Small Spot ARPES and Momentum Microscopy 

The KREIOS 150 is a new generation of electron spectrometers for high performance ARPES and PEEM. The unique lens system combines an immersion lens for PEEM operation with a hemispherical energy analyzer scanning system for unrivaled ARPES measurements. Its lens system acquires the full half sphere of the electron emission for ultimate angular acceptance of 180°.

The KREIOS 150 displays energy vs k-vector or energy vs spatial information directly on the detector. With the scanning lens it is possible to measure a full 3D dataset for ARPES or energy filtered PEEM. The lens system features apertures to refine the k-space into high contrast and dark field PEEM, as well as field apertures to select a spatial region for µ-ARPES down to 2 µm field of view. The kinetic energy up to 1500 eV allows XPS and XPEEM measurements. With the new CMOS detector the KREIOS 150 is the most performing ARPES analyzer available.

With a 2D CMOS detector it shows outstanding performance in countrate, linearity and a true puls counting mechanism. It combines a state of the art lens system with a proven hemisphere design for highest transmission and resolution.

The energy analyzer section is equipped with 8 customizable entrance and 3 exit slits. For highest energy and mapping resolution the entrance slit can be chosen down to 50 µm. The analyzer comes with a highly stable power supply, for best performance in a wide kinetic energy range.

This analyzer features the spectroscopy mode for data aquisition. For momentum microscopy a special MM and MM Twin version is available.