Multilayer optics Problems with BraggBrentano diffractometer geometry Multilayer
Multilayer optics Problems with Bragg-Brentano diffractometer geometry
Multilayer optics Problems with Bragg-Brentano diffractometer geometry axial divergence flat specimen error specimen transparency error specimen displacement error
Multilayer optics Problems with Bragg-Brentano diffractometer geometry disappear w/ parallel beam geometry
Multilayer optics Problems with Bragg-Brentano diffractometer geometry disappear w/ parallel beam geometry Even irregularly shaped specimens OK Can also increase beam intensity
Multilayer optics Problems with Bragg-Brentano diffractometer geometry disappear w/ parallel beam geometry Even irregularly shaped specimens OK Can also increase beam intensity - due to larger capture angle
Multilayer optics Problems with Bragg-Brentano diffractometer geometry disappear w/ parallel beam geometry Even irregularly shaped specimens OK Can also increase beam intensity - due to larger capture angle More monochromatic
Multilayer optics Alternate setup
Multilayer optics Alternate setup increased resolution reduced fluorescence from specimen
Multilayer optics Looks like this
Multilayer optics How does it work? From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
Multilayer optics How does it work? From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
Multilayer optics How does it work? From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
Multilayer optics How does it work? Performance characterized by rocking curve - fixed 2 , rotates From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
Multilayer optics How does it work? Performance characterized by rocking curve - fixed 2 , rotates smaller d, lower Z --> more penetration --> narrower curve
Multilayer optics γ - ratio of the thickness of heavy material to thickness of bi-layer Low γ multilayer has narrower rocking curve; higher γ multilayer has wider rocking curve
Multilayer optics γ - ratio of the thickness of heavy material to thickness of bi-layer Low γ multilayer has narrower rocking curve; higher γ multilayer has wider rocking curve Highest reflectivity can be achieved at specific γ, but dependent on coating materials
Multilayer optics Depth graded coating Yields broadened x-ray spectrum From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
Multilayer optics Laterally graded coating When combined w/ curved substrate, can focus From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
Multilayer optics Laterally graded coating When combined w/ curved substrate, can focus……. or make parallel beam (parabolic surface) From Principles, Performance and Applications of Multilayer Optics Srivatsan Seshadri, Osmic, Inc.
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