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High energy resolution, high angular acceptance crystal monochromator

Patent ·
OSTI ID:870448
 [1];  [2];  [3]
  1. Bolingbrook, IL
  2. Westmont, IL
  3. Green Bay, WI
+ Show Author Affiliations
A 4-bounce dispersive crystal monochromator reduces the bandpass of synchrotron radiation to a 10-50 meV range without sacrificing angular acceptance. The monochromator includes the combination of an asymmetrical channel-cut single crystal of lower order reflection and a symmetrical channel-cut single crystal of higher order reflection in a nested geometric configuration. In the disclosed embodiment, a highly asymmetrically cut (.alpha.=20) outer silicon crystal (4 2 2) with low order reflection is combined with a symmetrically cut inner silicon crystal (10 6 4) with high order reflection to condition a hard x-ray component (5-30 keV) of synchrotron radiation down to the .mu.eV-neV level. Each of the crystals is coupled to the combination of a positioning inchworm and angle encoder via a respective rotation stage for accurate relative positioning of the crystals and precise energy tuning of the monochromator.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5524040
Application Number:
08/169,656
OSTI ID:
870448
Country of Publication:
United States
Language:
English

References (2)

Construction of a precision diffractometer for nuclear Bragg scattering at the Photon Factory journal January 1992
A new apparatus for the study of nuclear Bragg scattering
  • Siddons, D. P.; Hastings, J. B.; Faigel, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 266, Issue 1-3 https://doi.org/10.1016/0168-9002(88)90406-8
journal April 1988

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Related Subjects

/378/
10
10-50
20
4-bounce
5-30
acceptance
accurate
alpha
angle
angle encoder
angular
angular acceptance
asymmetrical
asymmetrically
bandpass
channel-cut
combination
combined
component
condition
configuration
coupled
crystal
crystal monochromator
crystals
cut
disclosed
dispersive
embodiment
encoder
energy
energy resolution
ev-nev
geometric
hard
highly
inchworm
inner
kev
level
mev
mev range
monochromator
nested
outer
positioning
precise
radiation
range
reduces
reflection
relative
relative position
relative positioning
resolution
respective
rotation
sacrificing
silicon
silicon crystal
single
single crystal
stage
symmetrical
symmetrically
synchrotron
synchrotron radiation
tuning
via
x-ray