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Title: Inclined monochromator for high heat-load synchrotron x-ray radiation

A double crystal monochromator including two identical, parallel crystals, each of which is cut such that the normal to the diffraction planes of interest makes an angle less than 90 degrees with the surface normal. Diffraction is symmetric, regardless of whether the crystals are symmetrically or asymmetrically cut, enabling operation of the monochromator with a fixed plane of diffraction. As a result of the inclination of the crystal surface, an incident beam has a footprint area which is elongated both vertically and horizontally when compared to that of the conventional monochromator, reducing the heat flux of the incident beam and enabling more efficient surface cooling. Because after inclination of the crystal only a fraction of thermal distortion lies in the diffraction plane, slope errors and the resultant misorientation of the diffracted beam are reduced.
Inventors:
 [1]
  1. (Lisle, IL)
Issue Date:
OSTI Identifier:
869165
Assignee:
United States of America as represented by United States (Washington, DC) ANL
Patent Number(s):
US 5287395
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
inclined; monochromator; heat-load; synchrotron; x-ray; radiation; double; crystal; including; identical; parallel; crystals; cut; normal; diffraction; planes; makes; angle; 90; degrees; surface; symmetric; regardless; symmetrically; asymmetrically; enabling; operation; fixed; plane; result; inclination; incident; beam; footprint; elongated; vertically; horizontally; compared; conventional; reducing; heat; flux; efficient; cooling; fraction; thermal; distortion; lies; slope; errors; resultant; misorientation; diffracted; reduced; heat flux; incident beam; x-ray radiation; parallel crystal; ray radiation; diffracted beam; surface normal; crystal surface; crystal monochromator; synchrotron x-ray; thermal distortion; slope error; efficient surface; /378/