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 |
Measured Resolution |
logbook |
page |
arm length |
| V K-edge |
LiNbO3 (0 0 0 12) |
5.46 keV |
5.37 keV |
120 meV |
21 |
132 |
1 m |
| Cr K-edge |
Si(5 1 1) |
6.01 keV |
5.93 keV |
not tested, theoretical is 110 meV |
|
|
1 m |
| Mn K-edge |
Si(0 4 4) |
6.56 keV |
6.4571 keV |
Sector 9 tested 150 meV |
|
|
1 m |
| Eu L3-edge |
Ge(6 2 0) |
6.97 keV |
6.93 keV |
170 meV |
11 |
107, 109 |
1 m |
| Fe K-edge |
Ge(6 2 0) |
7.13 keV |
6.93 keV |
200 meV |
22 |
50 |
1 m |
| Co K-edge |
Ge (4 4 4) |
7.72 keV |
7.592 keV |
160 meV |
26M |
|
1 m |
| Co K-edge |
LiNbO3(3 3 -6 6) |
7.72 keV |
7.703 keV |
130 meV |
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 |
140 |
16 |
47 |
1 m |
| Ni K-edge |
Ge(6 4 2) |
8.34 keV |
8.20 keV |
120 meV |
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 |
120 meV |
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 |
210 meV |
|
|
1 m |
| Ir L3-edge |
Si(8 4 4) |
11.215 keV |
11.185 keV |
128 meV |
25M |
98 |
1 m |
| As K-edge |
Si(7 7 3) |
11.867 keV |
11.808 keV |
155 meV |
25M |
96 |
1 m |
|
