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Title: High energy resolution, high angular acceptance crystal monochromator

Abstract

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.

Inventors:
 [1];  [2];  [3]
  1. Bolingbrook, IL
  2. Westmont, IL
  3. Green Bay, WI
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
870448
Patent Number(s):
US 5524040
Application Number:
08/169,656
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /378/

Citation Formats

Alp, Ercan E, Mooney, Timothy M, and Toellner, Thomas. High energy resolution, high angular acceptance crystal monochromator. United States: N. p., 1996. Web.
Alp, Ercan E, Mooney, Timothy M, & Toellner, Thomas. High energy resolution, high angular acceptance crystal monochromator. United States.
Alp, Ercan E, Mooney, Timothy M, and Toellner, Thomas. 1996. "High energy resolution, high angular acceptance crystal monochromator". United States. https://www.osti.gov/servlets/purl/870448.
@article{osti_870448,
title = {High energy resolution, high angular acceptance crystal monochromator},
author = {Alp, Ercan E and Mooney, Timothy M and Toellner, Thomas},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/870448}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {6}
}

Works referenced in this record:

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
journal, April 1988

  • 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