What Does a Scattering Pattern Tell US? PDF
Preview What Does a Scattering Pattern Tell US?
What Does a Scattering Pattern Tell Us? 7th X-ray Scattering School Apurva Mehta Goal : See Atomic Scale Structures Photography Camera Lights Light • Interaction of Light with Matter – Transparent – Scatters – Absorbs/re- emits (Resonance) X-ray camera (microscope) at SSRL slit Si(Li) BL 6-2 CCD y MZP x reflective Condenser But not for atomic scale. Why not? 4m What Does the Camera Do? Camera image sample light lens Image Sample Angular Space Space Space Resolution of Full Field Camera Full Field imaging is a “wave” phenomena - interference pattern dark and light stops image image sample light lens 4q l Rayleigh’s Image Resolution ~ l/sin(q) + lens Aberrations Criteria X-ray lens with resolution better than ~10nm don’t exist Scattering Physics image sample light lens Math Q = 4p sin(q) /l Sample Image SAcnagttuelrainr g Space Space SSppaaccee Can we create the image without a lens? Lensless Imaging image sample light n r e lens t t a P g n i r e t t a c S Q = 4p sin(q) /l Sample SAcnagttuelrainr g Space SSppaaccee
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