Changeset 2383


Ignore:
Timestamp:
Jul 28, 2016 2:16:04 PM (5 years ago)
Author:
vondreele
Message:
 
Location:
Tutorials/2DCalibration
Files:
2 edited

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  • Tutorials/2DCalibration/Calibration of an area detector in GSAS.htm

    r1732 r2383  
    2525  <o:Author>Von Dreele</o:Author>
    2626  <o:LastAuthor>Von Dreele</o:LastAuthor>
    27   <o:Revision>4</o:Revision>
    28   <o:TotalTime>250</o:TotalTime>
     27  <o:Revision>5</o:Revision>
     28  <o:TotalTime>251</o:TotalTime>
    2929  <o:Created>2014-07-21T14:30:00Z</o:Created>
    30   <o:LastSaved>2015-03-17T21:04:00Z</o:LastSaved>
    31   <o:Pages>1</o:Pages>
     30  <o:LastSaved>2016-07-28T18:32:00Z</o:LastSaved>
     31  <o:Pages>12</o:Pages>
    3232  <o:Words>1117</o:Words>
    33   <o:Characters>6373</o:Characters>
     33  <o:Characters>6367</o:Characters>
    3434  <o:Company>Argonne National Laboratory</o:Company>
    3535  <o:Lines>53</o:Lines>
    3636  <o:Paragraphs>14</o:Paragraphs>
    37   <o:CharactersWithSpaces>7476</o:CharactersWithSpaces>
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    11301142
    11311143<p class=MsoNormal>In this tutorial, data collected with a Perkin-Elmer area
    1132 detector at APS 11-ID-C with a wavelength 0.10798 A, where the detector was
    1133 intentionally tilted at 45 degrees, are used. Note that menu entries are listed
    1134 in bold face below as <b style='mso-bidi-font-weight:normal'><span
     1144detector at APS 11-ID-C with a wavelength 0.10798 A, where the detector was intentionally
     1145tilted at 45 degrees, are used. Note that menu entries are listed in bold face
     1146below as <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1147mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
     1148Calibri;mso-bidi-theme-font:minor-latin'>Help/About GSAS-II</span></b>, which
     1149lists first the name of the menu (here <b style='mso-bidi-font-weight:normal'><span
    11351150style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    11361151mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1137 minor-latin'>Help/About GSAS-II</span></b>, which lists first the name of the
    1138 menu (here <b style='mso-bidi-font-weight:normal'><span style='font-family:
    1139 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
    1140 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>Help</span></b>)
    1141 and second the name of the entry in the menu (here <b style='mso-bidi-font-weight:
    1142 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1143 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1144 mso-bidi-theme-font:minor-latin'>About GSAS-II</span></b>).</p>
     1152minor-latin'>Help</span></b>) and second the name of the entry in the menu
     1153(here <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1154mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
     1155Calibri;mso-bidi-theme-font:minor-latin'>About GSAS-II</span></b>).</p>
    11451156
    11461157<p class=MsoNormal>If you have not done so already, <u><span style='color:#0070C0'><a
     
    11561167<p class=MsoNormal><span style='mso-spacerun:yes'> </span></p>
    11571168
    1158 <p class=MsoNormal>A file selection dialog will be shown; its appearance will
    1159 depend on your OS. Change the search directory to <b style='mso-bidi-font-weight:
    1160 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1161 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1162 mso-bidi-theme-font:minor-latin'>/exercises/2DCalibration</span></b> and then
    1163 select the file </p>
     1169<p class=MsoNormal>A file selection dialog will be shown; its appearance will depend
     1170on your OS. Change the search directory to <b style='mso-bidi-font-weight:normal'><span
     1171style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
     1172mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
     1173minor-latin'>2DCalibration/data</span></b> and then select the file </p>
    11641174
    11651175<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
     
    12161226
    12171227<p class=MsoNormal><span style='mso-spacerun:yes'> </span>The plot window shows
    1218 the image; notice the elliptical shape of the powder diffraction rings due to the
    1219 45 degree detector tilt. The blue <b style='mso-bidi-font-weight:normal'><span
     1228the image; notice the elliptical shape of the powder diffraction rings due to
     1229the 45 degree detector tilt. The blue <b style='mso-bidi-font-weight:normal'><span
    12201230style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    12211231mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
     
    12471257to <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    12481258mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1249 Calibri;mso-bidi-theme-font:minor-latin'>0.10798</span></b>. We will be determining
    1250 the calibration values of all the checked items. In this case wavelength is
    1251 known (‘Penetration’ is a correction for x-ray penetration into the detector;
    1252 it is only needed when the detector is close to the sample). Under certain
    1253 circumstances it may be useful to restrict the calibration to fewer parameters
    1254 (i.e. if distance is presumed to be “known”) in which case you can uncheck some
    1255 of the calibration parameters and use their fixed values. It is also helpful to
    1256 change the display of the image so that it is easier to see the diffraction
    1257 rings. Lowering the maximum intensity to 10,000 to 20,000 counts will help
    1258 (note that this can be done by moving the slider, or by typing a value in the
    1259 box and then clicking on another control or pressing the <b style='mso-bidi-font-weight:
    1260 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1261 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1262 mso-bidi-theme-font:minor-latin'>Enter</span></b> or <b style='mso-bidi-font-weight:
    1263 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1264 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1265 mso-bidi-theme-font:minor-latin'>Tab</span></b> key). You may also wish to
    1266 select another color scheme using the <b style='mso-bidi-font-weight:normal'><span
     1259Calibri;mso-bidi-theme-font:minor-latin'>0.10798</span></b>. We will be
     1260determining the calibration values of all the checked items. In this case
     1261wavelength is known (‘Penetration’ is a correction for x-ray penetration into
     1262the detector; it is only needed when the detector is close to the sample).
     1263Under certain circumstances it may be useful to restrict the calibration to
     1264fewer parameters (i.e. if distance is presumed to be “known”) in which case you
     1265can uncheck some of the calibration parameters and use their fixed values. It
     1266is also helpful to change the display of the image so that it is easier to see
     1267the diffraction rings. Lowering the maximum intensity to 10,000 to 20,000
     1268counts will help (note that this can be done by moving the slider, or by typing
     1269a value in the box and then clicking on another control or pressing the <b
     1270style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1271mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
     1272Calibri;mso-bidi-theme-font:minor-latin'>Enter</span></b> or <b
     1273style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1274mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
     1275Calibri;mso-bidi-theme-font:minor-latin'>Tab</span></b> key). You may also wish
     1276to select another color scheme using the <b style='mso-bidi-font-weight:normal'><span
    12671277style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    12681278mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
     
    13161326
    13171327<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1318  id="_x0000_i1035" type="#_x0000_t75" style='width:525pt;height:450pt;
    1319  visibility:visible;mso-wrap-style:square'>
     1328 id="Picture_x0020_4" o:spid="_x0000_i1035" type="#_x0000_t75" style='width:525pt;
     1329 height:450pt;visibility:visible;mso-wrap-style:square'>
    13201330 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image004.png"
    13211331  o:title=""/>
    13221332</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
    13231333src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image004.png"
    1324 v:shapes="_x0000_i1035"><![endif]></span></p>
     1334v:shapes="Picture_x0020_4"><![endif]></span></p>
    13251335
    13261336<p class=MsoNormal><span style='mso-spacerun:yes'>  </span>To remove a point
    13271337added in error click on that point with the right mouse button (on the Mac, if
    13281338you have a single-button mouse, hold the control key down and click). NB: it is
    1329 slightly better to pick points just inside the inner ring as GSAS-II will then find
    1330 the best point on that ring.</p>
     1339slightly better to pick points just inside the inner ring as GSAS-II will then
     1340find the best point on that ring.</p>
    13311341
    13321342<h3><span style='mso-spacerun:yes'> </span>Fourth:</h3>
     
    13491359
    13501360<p class=MsoNormal><span style='mso-spacerun:yes'> </span><span
    1351 style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="_x0000_i1034" type="#_x0000_t75"
    1352  style='width:525pt;height:450pt;visibility:visible;mso-wrap-style:square'>
     1361style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_5"
     1362 o:spid="_x0000_i1034" type="#_x0000_t75" style='width:525pt;height:450pt;
     1363 visibility:visible;mso-wrap-style:square'>
    13531364 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image005.png"
    13541365  o:title=""/>
    13551366</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
    13561367src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image005.png"
    1357 v:shapes="_x0000_i1034"><![endif]></span><span
     1368v:shapes="Picture_x0020_5"><![endif]></span><span
    13581369style='mso-spacerun:yes'> </span></p>
    13591370
     
    13731384style='mso-spacerun:yes'> </span></p>
    13741385
    1375 <p class=MsoNormal><span class=GramE>and</span> the console window shows
    1376 details of the fit.</p>
     1386<p class=MsoNormal>and the console window shows details of the fit.</p>
    13771387
    13781388<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
     
    14081418style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    14091419mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1410 Calibri;mso-bidi-theme-font:minor-latin'>show ring picks?</span></b> <span
    1411 class=GramE>check</span> box </p>
     1420Calibri;mso-bidi-theme-font:minor-latin'>show ring picks?</span></b> check box </p>
    14121421
    14131422<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1414  id="_x0000_i1031" type="#_x0000_t75" style='width:525pt;height:450pt;
    1415  visibility:visible;mso-wrap-style:square'>
     1423 id="Picture_x0020_8" o:spid="_x0000_i1031" type="#_x0000_t75" style='width:525pt;
     1424 height:450pt;visibility:visible;mso-wrap-style:square'>
    14161425 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image008.png"
    14171426  o:title=""/>
    14181427</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
    14191428src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image008.png"
    1420 v:shapes="_x0000_i1031"><![endif]></span><span
     1429v:shapes="Picture_x0020_8"><![endif]></span><span
    14211430style='mso-spacerun:yes'> </span><span style='color:#1F497D;mso-themecolor:
    14221431text2'><o:p></o:p></span></p>
  • Tutorials/2DCalibration/Integration of area detector data in GSAS.htm

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