ATHENA: XAS Data Processing

Just as Phaeacian men excel the world at sailing, driving
their swift ships on the open seas, so the women excel at
all the arts of weaving. That is Athena's gift to them
beyond all others -- a genius for lovely work, and a fine
mind too.
                             (Homer, The Odyssey, Book 7)

The Tholos sanctuary of Athena Pronoia, Athena of forethought.

Athena is the goddess of wisdom and craft, a fine patron for the XAS practitioner.

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Contents:

• 1. Forward
  • 1.1. Layout and typesetting conventions
  • 1.2. Acknowledgments
  • 1.3. Data citations
  • 1.4. Installing ATHENA on your computer
  • 1.5. Building this document from source
• 2. Introduction to ATHENA
  • 2.1. First Look at ATHENA
  • 2.2. Getting help
  • 2.3. Folders and log files
• 3. Data import
  • 3.1. Column selection dialog
  • 3.2. Project selection dialog
  • 3.3. Multiple data set import
  • 3.4. Reference channel
  • 3.5. Preprocessing data
• 4. Normalization and background removal
  • 4.1. Normalization
  • 4.2. The AUTOBK Algorithm and the Rbkg Parameter
  • 4.3. Spline clamps and k-weight in background removal
  • 4.4. Spline range in background removal
  • 4.5. Energy-dependent normalization
  • 4.6. Data measured over a very short energy range
• 5. Plotting Your Data
  • 5.1. Plotting space tabs
  • 5.2. Spectral resolution and k-range
  • 5.3. Other plotting options
  • 5.4. Group specific plot parameters
  • 5.5. Special plots for XAS data
• 6. User Interface
  • 6.1. Using the group list
  • 6.2. Marking groups
  • 6.3. Pluck buttons
  • 6.4. Plot styles
  • 6.5. k-weights in plots and Fourier transforms
  • 6.6. Frozen groups
  • 6.7. The Monitor menu
• 7. Setting parameters
  • 7.1. Constraining parameters between data groups
  • 7.2. Setting E0
  • 7.3. Default parameter values
• 8. Data export
  • 8.1. Column output files
  • 8.2. Project files
  • 8.3. Parameter report files
• 9. Data processing
  • 9.1. Calibrating data groups
  • 9.2. Aligning data groups
  • 9.3. Merging data groups
  • 9.4. Rebinning data groups
  • 9.5. Deglitching and truncating data
  • 9.6. Smoothing data
  • 9.7. Convoluting data groups
  • 9.8. Deconvoluting data groups
  • 9.9. Self-absorption approximations
  • 9.10. Dispersive XAS
  • 9.11. Multi-electron excitation removal
  • 9.12. Copy series
  • 9.13. Data summation
• 10. Data analysis
  • 10.1. Linear combination fitting
  • 10.2. Principle components analysis
  • 10.3. Peak fitting
  • 10.4. Log-ratio/phase-difference analysis
  • 10.5. Difference spectra
• 11. Other main window chores
  • 11.1. File metadata
  • 11.2. Project journal
  • 11.3. File type plugins
  • 11.4. Configuring ATHENA to work for you
• 12. Worked examples
  • 12.1. Basic data processing
  • 12.2. Linear combination analysis
• 13. Hephaestus
  • 13.1. Absorption
  • 13.2. Formulas
  • 13.3. Ion Chambers
  • 13.4. Data
  • 13.5. Transitions
  • 13.6. Edge Finder
  • 13.7. Line Finder
  • 13.8. Standards
  • 13.9. F' and F"
  • 13.10. Preferences
  • 13.11. Credits
  • 13.12. Bugs and limitations

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DEMETER is copyright © 2009-2016 Bruce Ravel – This document is copyright © 2016 Bruce Ravel

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