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Title: High energy resolution, high angular acceptance crystal monochromator

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 {micro}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. 7 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
242592
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 430303; PA: EDB-96:095153; SN: 96001600393
Patent Number(s):
US 5,524,040/A/
Application Number:
PAN: 8-169,656; TRN: 96:013091
Contract Number:
W-31109-ENG-38
Resource Relation:
Other Information: PBD: 4 Jun 1996
Research Org:
Univ. of Chicago, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; MONOCHROMATORS; DESIGN; SYNCHROTRON RADIATION SOURCES; ACCELERATOR FACILITIES; MONOCRYSTALS

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