MERIX

MERIX is a medium energy resolution 6 circle diffractometer for non-resonant and resonant inelastic x-ray measurements.

  • Detect Strip detector: dramatically more collected phonons at a given energy resolution compared to conventional detectors (principle of operation).
  • Pin diode detector mounted on the two theta arm for final sample alignment
  • Fluorescence detector: for absorption measurements on samples
  • Spot size: focused horizontal x vertical = 45 um x 6 um, unfocussed = 2.2 mm x 0.4 mm
  • Momentum resolution varies with incident energy but the angular acceptance of the analyzer is 5.7 degrees. This can be reduced with slits.
  • Maximum two-theta is 90 (horizontal) and 62 (vertical).
  • chi range is -15 to 20 or 75 to 110 (depending on which phi circle is used)
  • Strip detector scan columns:
    E Energy
    C Number of counts, unnormalized in any way
    A number of strips used at each energy
    F C*max(A)/A
    X error bar for F column = sqrt(C)*max(A)/A
    M beam monitor
    N max(M)*C/M

RIXS analyzers:

Analyzer Analyzer Reflection Edge energy Analyzer backscattering energy logbook page arm length
V K-edge LiNbO3 (0 0 0 12) 5.46 keV 5.37 keV 21 132 1 m
Cr K-edge Si(5 1 1) 6.01 keV 5.93 keV     1 m
Mn K-edge Si(0 4 4) 6.56 keV 6.4571 keV     1 m
Eu L3-edge Ge(6 2 0) 6.97 keV 6.93 keV 11 107, 109 1 m
Fe K-edge Ge(6 2 0) 7.13 keV 6.93 keV 22 50 1 m
Co K-edge Ge (4 4 4) 7.72 keV 7.592 keV 26M 1 m
Co K-edge LiNbO3(3 3 -6 6) 7.72 keV 7.703 keV 22 7 1 m
Co K-edge LiNbO3(3 3 -6 6) 7.72 keV 7.703 keV     2 m
Ni K-edge LiNbO3(0 6 -6 0) 8.34 8.34 keV 16 47 1 m
Ni K-edge Ge(6 4 2) 8.34 keV 8.20 keV 19 118 1 m
Ni K-edge Ge(6 4 2) 8.34 keV 8.20 keV     2 m
Cu K-edge Ge(3 3 7) 8.98 keV 8.969 keV 20 28 1 m
Cu K-edge Ge(3 3 7) 8.98 keV 8.969 keV     2 m
Yb L3-edge Ge(0 0 8) 8.94 keV 8.78 keV     1 m
Os L3-edge Si(4 6 6) 10.871 keV 10.708 keV 31M 107 2 m
Ir L3-edge Si(8 4 4) 11.215 keV 11.185 keV 25M 98 1 m
Ir L3-edge Si(8 4 4) 11.215 keV 11.185 keV     2 m
As K-edge Si(7 7 3) 11.867 keV 11.808 keV 25M 96 1 m