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Title: 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 (United States)
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

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