SIX RIXS-Spectrometer
The long and variable exit arm length of the SIX RIXS-Spectrometer and the variable included angle at the grating allow for very high energy resolution over the whole spectral range. The compact design and mechanical decoupling of the optical components ensure very high vibrational and drift stability.
Mechanism
The collimating mirror unit, the grating unit and the detector unit have separate rotational guidance and drive for the variation of the scattering angle.
Performance parameters
Performance parameter values for individual projects may well exceed the values listed below.
Spectrometer rotation
Range
120°
Resolution
< 0.01°
Circle of confusion
< 3 µm (at R = 500 mm)
< 8 µm (at R = 1000 mm)
Vertical deviation
< 15 µm (at R = 3000 mm)
< 35 µm (at R = 150000 mm)
Grating/mirror pitch
Range
> 20°
Resolution
< 0.01 µrad
Repeatability
< 0.15 µrad
Stability
< 0.05 µrad
Performance Test Results
Grating pitch repeatability after pitch variation
Grating roll repeatability after pitch variation
Grating pitch repeatability after grating exchange
Grating roll repeatability after grating exchange
Mirror pitch stability
Grating pitch stability
Parasitic height deviation upon spectrometer rotation
Parasitic height deviation upon spectrometer rotation
Circle of confusion (M5)
Circle of confusion (3AA)
Circle of confusion (DAA)
Application
Spectrometers at synchrotron radiation beamlines are used to analyze and detect soft and hard X-ray radiation, which is elastically and inelastically scattered from a specimen placed in the interaction center of the experimental station.
