Ignore:
Timestamp:
Aug 3, 2018 10:51:26 PM (3 years ago)
Author:
toby
Message:

finish web tutorials for now

File:
1 edited

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  • Tutorials/TOF Calibration/Calibration of a TOF powder diffractometer.htm

    r3064 r3553  
    11531153color:#365F91;mso-themecolor:accent1;mso-themeshade:191'><o:p></o:p></span></b></p>
    11541154
     1155<P><B>A video version of this tutorial is available at
     1156<A href="https://anl.box.com/v/CalibrationofaTOFpowderdiffrac" target="_blank">
     1157https://anl.box.com/v/CalibrationofaTOFpowderdiffrac</A></B></P>
     1158
    11551159<p class=MsoNormal>In this tutorial, data collected on the SNS instrument
    11561160POWGEN, are used. The calibration process will use the fitted positions of all
     
    11791183text-underline:none'>start GSAS-II</span></a></span></u>.</p>
    11801184
    1181 <h1>Part I. Determine the diffractometer constants</h1>
    1182 
    1183 <h2>Step 1: Read in the data file</h2>
     1185<h2>Part I. Determine the diffractometer constants</h2>
     1186
     1187<h3>Step 1: Read in the data file</h3>
    11841188
    11851189<p class=MsoNormal><span style='mso-spacerun:yes'> </span>Use the <b
     
    12651269style='mso-spacerun:yes'> </span><b style='mso-bidi-font-weight:normal'><o:p></o:p></b></p>
    12661270
    1267 <h2><span style='mso-spacerun:yes'> </span>Step 2: Select peaks</h2>
     1271<h3><span style='mso-spacerun:yes'> </span>Step 2: Select peaks</h3>
    12681272
    12691273<p class=MsoNormal>Under the <b style='mso-bidi-font-weight:normal'><span
     
    13051309turned off.</p>
    13061310
    1307 <h2>Step 3: Fit peaks</h2>
     1311<h3>Step 3: Fit peaks</h3>
    13081312
    13091313<p class=MsoNormal>To do the initial fit to the peaks, select the <b
     
    13651369v:shapes="Picture_x0020_40"><![endif]></span></p>
    13661370
    1367 <h2>Step 4: Setup for calibration</h2>
     1371<h3>Step 4: Setup for calibration</h3>
    13681372
    13691373<p class=MsoNormal>Now that we have a reasonably well fit set of peak
     
    14451449<p class=MsoNormal>The calibration set up is now complete.</p>
    14461450
    1447 <h2>Step 5: Calibration of diffractometer constants</h2>
     1451<h3>Step 5: Calibration of diffractometer constants</h3>
    14481452
    14491453<p class=MsoNormal>As we now have a set of reflection positions each properly
     
    16021606in the second part of the tutorial.</p>
    16031607
    1604 <h1>Part II. Determine the instrument profile coefficients</h1>
     1608<h2>Part II. Determine the instrument profile coefficients</h2>
    16051609
    16061610<p class=MsoNormal>To best establish the profile coefficients one must have the
     
    16101614automatic procedure used above.</p>
    16111615
    1612 <h2>Step 1. Change background</h2>
     1616<h3>Step 1. Change background</h3>
    16131617
    16141618<p class=MsoNormal>Select the <b style='mso-bidi-font-weight:normal'><span
     
    16551659v:shapes="Picture_x0020_51"><![endif]></span></p>
    16561660
    1657 <h2>Step 2. Add more peaks to be fitted</h2>
     1661<h3>Step 2. Add more peaks to be fitted</h3>
    16581662
    16591663<p class=MsoNormal>Now zoom in on the right hand end of the pattern and select
     
    17151719project</span></b> from the main GSAS-II data tree window.</p>
    17161720
    1717 <h2>Step 3. Refine profile coefficients</h2>
     1721<h3>Step 3. Refine profile coefficients</h3>
    17181722
    17191723<p class=MsoNormal>In this step you will be selecting some profile coefficients
     
    21252129curve to be about zero.</p>
    21262130
    2127 <h2>Step 4. Check diffractometer constants </h2>
     2131<h3>Step 4. Check diffractometer constants </h3>
    21282132
    21292133<p class=MsoNormal>Since these calibration fits for profile coefficients varied
     
    21792183the main GSAS-II data tree menu).</p>
    21802184
    2181 <h2>Step 5. Make instrument parameter file</h2>
     2185<h3>Step 5. Make instrument parameter file</h3>
    21822186
    21832187<p class=MsoNormal>We now have a fully calibrated instrument with
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