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

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869165

Khounsary, Ali M ^[1]

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1. Lisle, IL

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.

• 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 5287395
• OSTI ID: 869165
• Country of Publication: United States
• Language: English

Related Subjects

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/