Thorium Dioxide (ThO2) And Its Optical Constants in The Extreme Ultraviolet Elise Martin & David Muhlestein.

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Presentation transcript:

Thorium Dioxide (ThO2) And Its Optical Constants in The Extreme Ultraviolet Elise Martin & David Muhlestein

Astronomy The sun in the Extreme Ultraviolet

Plasma Diagnostics UC Davis Plasma Diagnostic Group (PDG)

Other Uses Photolithography Photolithography Microscopy Microscopy

The Sputtering Process

Berkeley, California Berkeley Provo

Fitting

Bad Fit

Good Fit

The Index of Refraction δ =1-n=real part of index of refraction affects wavelength affects wavelength β =k =imaginary part of index of refraction affects attenuation affects attenuation

Attenuation due to β

Delta vs. Wavelength

Beta vs. Wavelength

Why is ThO 2 important? - Small β and small δ means ThO 2 makes a good spacer layer for multilayer mirrors - Easily made compared to other materials

Acknowledgements Niki Farnsworth Niki Farnsworth Dr. Steven Turley Dr. Steven Turley Dr. David Allred Dr. David Allred The BYU Thin Films Research Group The BYU Thin Films Research Group The Advanced Light Source The Advanced Light Source