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John Bargar Senior Scientist June 30, 2011

SSRL Synchrotron X-Ray Absorption Spectroscopy Summer School (6 th annual) June 28 - July 1, 2011. Intro to Sixpack, Background Subtraction. John Bargar Senior Scientist June 30, 2011. Intro to SixPack. Install SixPack by extracting zip file Start SixPack Review All Modules

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John Bargar Senior Scientist June 30, 2011

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  1. SSRL Synchrotron X-Ray Absorption Spectroscopy Summer School (6th annual)June 28 - July 1, 2011 Intro to Sixpack, Background Subtraction John Bargar Senior Scientist June 30, 2011

  2. Intro to SixPack • Install SixPack by extracting zip file • Start SixPack • Review All Modules • SamView basics • Opening data: SG1UC click on each file • Plotting data: plot options, zoom/unzoom, coordinates • Derivatives and E calibration • Applying E shifts to data • BEWARE: ONLY THE FIRST SCAN COUNTS! • Save averages: muF, muT1 • WHICH DATA SET SHOULD I USE, TRANS OR FLUO? • Best way to get data for plotting

  3. Intro to SixPack • Open SG1UG files (leave other files there) • Group ave with muF • Delete SG1UC files • Save muF • Energy calibration – CAREFUL! • Save and Clear • Open EXP08_6_1EXT_EXAFS_002 files • Inspect and DT correct. 13. Save muF

  4. Intro to Background Removal • Start a NEW sixpack session. • Background subtraction basics • Open files with .avg extensions • Plotting data: plot options, zoom/unzoom, coordinates • Derivatives and E calibration • Applying E shifts to data • THIS IS THE SAFER WAY TO RECALIBRATE! • Where are the XANES? • Where are the EXAFS? • What is the best spline? • How to take the FT • Saving Data for XANES • Saving Data for EXAFS

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