Ignore:
Timestamp:
Aug 8, 2017 4:07:17 PM (4 years ago)
Author:
vondreele
Message:

update to 2 frame

Location:
Tutorials/2DCalibration
Files:
8 added
6 edited

Legend:

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

    r2383 r2972  
    2424 <o:DocumentProperties>
    2525  <o:Author>Von Dreele</o:Author>
    26   <o:LastAuthor>Von Dreele</o:LastAuthor>
    27   <o:Revision>5</o:Revision>
    28   <o:TotalTime>251</o:TotalTime>
     26  <o:LastAuthor>vondreele</o:LastAuthor>
     27  <o:Revision>6</o:Revision>
     28  <o:TotalTime>270</o:TotalTime>
    2929  <o:Created>2014-07-21T14:30:00Z</o:Created>
    30   <o:LastSaved>2016-07-28T18:32:00Z</o:LastSaved>
    31   <o:Pages>12</o:Pages>
    32   <o:Words>1117</o:Words>
    33   <o:Characters>6367</o:Characters>
     30  <o:LastSaved>2017-08-08T20:56:00Z</o:LastSaved>
     31  <o:Pages>11</o:Pages>
     32  <o:Words>1112</o:Words>
     33  <o:Characters>6340</o:Characters>
    3434  <o:Company>Argonne National Laboratory</o:Company>
    35   <o:Lines>53</o:Lines>
     35  <o:Lines>52</o:Lines>
    3636  <o:Paragraphs>14</o:Paragraphs>
    37   <o:CharactersWithSpaces>7470</o:CharactersWithSpaces>
     37  <o:CharactersWithSpaces>7438</o:CharactersWithSpaces>
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    5050  <w:View>Print</w:View>
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    11421145
    11431146<p class=MsoNormal>In this tutorial, data collected with a Perkin-Elmer area
    1144 detector at APS 11-ID-C with a wavelength 0.10798 A, where the detector was intentionally
    1145 tilted at 45 degrees, are used. Note that menu entries are listed in bold face
    1146 below as <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1147 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1148 Calibri;mso-bidi-theme-font:minor-latin'>Help/About GSAS-II</span></b>, which
    1149 lists first the name of the menu (here <b style='mso-bidi-font-weight:normal'><span
     1147detector at APS 11-ID-C with a wavelength 0.10798 A, where the detector was
     1148intentionally tilted at 45 degrees, are used. Note that menu entries are listed
     1149in bold face below as <b style='mso-bidi-font-weight:normal'><span
    11501150style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1151 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
     1151mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Help/About
     1152GSAS-II</span></b>, which lists first the name of the menu (here <b
     1153style='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-theme-font:
    11521155minor-latin'>Help</span></b>) and second the name of the entry in the menu
    11531156(here <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1154 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1155 Calibri;mso-bidi-theme-font:minor-latin'>About GSAS-II</span></b>).</p>
     1157mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1158minor-latin'>About GSAS-II</span></b>).</p>
    11561159
    11571160<p class=MsoNormal>If you have not done so already, <u><span style='color:#0070C0'><a
     
    11621165
    11631166<p class=MsoNormal><span style='mso-spacerun:yes'> </span>Use the <b
    1164 style='mso-bidi-font-weight:normal'>Data/Read image data</b> menu item to read
    1165 the data file into the current GSAS-II project. </p>
     1167style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1168mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1169minor-latin'>Import/Image/from TIF image file</span></b> menu item to read the
     1170data file into the current GSAS-II project. </p>
    11661171
    11671172<p class=MsoNormal><span style='mso-spacerun:yes'> </span></p>
    11681173
    1169 <p class=MsoNormal>A file selection dialog will be shown; its appearance will depend
    1170 on your OS. Change the search directory to <b style='mso-bidi-font-weight:normal'><span
    1171 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1172 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1173 minor-latin'>2DCalibration/data</span></b> and then select the file </p>
     1174<p class=MsoNormal>A file selection dialog will be shown; its appearance will
     1175depend on your OS. Change the search directory to <b style='mso-bidi-font-weight:
     1176normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
     1177minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>2DCalibration/data</span></b>
     1178and then select the file </p>
    11741179
    11751180<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
    11761181style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1177 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1178 minor-latin'>La_hex_+45deg-00015.tif</span></b> and press <b style='mso-bidi-font-weight:
    1179 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1180 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1181 mso-bidi-theme-font:minor-latin'>Open</span></b>.<span style='mso-no-proof:
    1182 yes'> <o:p></o:p></span></p>
     1182mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>La_hex_+45deg-00015.tif</span></b>
     1183and press <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1184mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1185minor-latin'>Open</span></b>.<span style='mso-no-proof:yes'> <o:p></o:p></span></p>
    11831186
    11841187<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype
     
    12021205 <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/>
    12031206 <o:lock v:ext="edit" aspectratio="t"/>
    1204 </v:shapetype><v:shape id="Picture_x0020_1" o:spid="_x0000_i1038" type="#_x0000_t75"
    1205  style='width:300pt;height:187.5pt;visibility:visible;mso-wrap-style:square'>
    1206  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image001.png"
     1207</v:shapetype><v:shape id="Picture_x0020_15" o:spid="_x0000_i1037" type="#_x0000_t75"
     1208 style='width:468pt;height:315pt;visibility:visible;mso-wrap-style:square'>
     1209 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image015.png"
    12071210  o:title=""/>
    1208 </v:shape><![endif]--><![if !vml]><img border=0 width=400 height=250
    1209 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image001.png"
    1210 v:shapes="Picture_x0020_1"><![endif]></span></p>
    1211 
    1212 <p class=MsoNormal>At this point the data tree window will have several
    1213 entries; the highlighted one specifies the contents of the data window as <b
     1211</v:shape><![endif]--><![if !vml]><img border=0 width=624 height=420
     1212src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image016.png"
     1213v:shapes="Picture_x0020_15"><![endif]></span></p>
     1214
     1215<p class=MsoNormal>At this point the data tree window will have several entries;
     1216by default the highlighted one specifies the contents of the data window as <b
    12141217style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1215 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1216 Calibri;mso-bidi-theme-font:minor-latin'>Image Controls</span><o:p></o:p></b></p>
    1217 
    1218 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1219  id="Picture_x0020_2" o:spid="_x0000_i1037" type="#_x0000_t75" style='width:472.5pt;
    1220  height:388.5pt;visibility:visible;mso-wrap-style:square'>
    1221  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image002.png"
     1218mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1219minor-latin'>Image Controls. </span></b>I’ve expanded the window to see all the
     1220contents.</p>
     1221
     1222<p class=MsoNormal><o:p>&nbsp;</o:p></p>
     1223
     1224<p class=MsoNormal>The plot window shows the image; I’ve changed the Max
     1225intensity to ~88000. Notice the elliptical shape of the powder diffraction
     1226rings due to the 45 degree detector tilt. The blue <b style='mso-bidi-font-weight:
     1227normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
     1228minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin;
     1229color:#4F81BD;mso-themecolor:accent1'>X</span></b> marks the beam location
     1230(which defaults to the image center); the calibration you will perform here
     1231will find the correct placement for it. Also note that as the mouse is moved
     1232across the plot the plot window status bar (at bottom of plot window) shows the
     1233cursor position, as computed from the default (incorrect) calibration values.
     1234These constants will be correctly determined after you finish the calibration.</p>
     1235
     1236<p class=MsoNormal><span style='mso-spacerun:yes'> </span><span
     1237style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_16"
     1238 o:spid="_x0000_i1036" type="#_x0000_t75" style='width:468pt;height:401.25pt;
     1239 visibility:visible;mso-wrap-style:square'>
     1240 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image017.png"
    12221241  o:title=""/>
    1223 </v:shape><![endif]--><![if !vml]><img border=0 width=630 height=518
    1224 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image002.png"
    1225 v:shapes="Picture_x0020_2"><![endif]></span></p>
    1226 
    1227 <p class=MsoNormal><span style='mso-spacerun:yes'> </span>The plot window shows
    1228 the image; notice the elliptical shape of the powder diffraction rings due to
    1229 the 45 degree detector tilt. The blue <b style='mso-bidi-font-weight:normal'><span
    1230 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1231 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1232 minor-latin;color:#4F81BD;mso-themecolor:accent1'>X</span></b> marks the beam
    1233 location (which defaults to the image center); the calibration you will perform
    1234 here will find the correct placement for it. Also note that as the mouse is
    1235 moved across the plot the plot window status bar (at bottom of plot window)
    1236 shows the cursor position, as computed from the default (incorrect) calibration
    1237 values. These constants will be correctly determined after you finish the
    1238 calibration.</p>
    1239 
    1240 <p class=MsoNormal><span style='mso-spacerun:yes'> </span><span
    1241 style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_15"
    1242  o:spid="_x0000_i1036" type="#_x0000_t75" style='width:525pt;height:450pt;
    1243  visibility:visible;mso-wrap-style:square'>
    1244  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image003.png"
    1245   o:title=""/>
    1246 </v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
    1247 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image003.png"
    1248 v:shapes="Picture_x0020_15"><![endif]></span></p>
     1242</v:shape><![endif]--><![if !vml]><img border=0 width=624 height=535
     1243src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image018.png"
     1244v:shapes="Picture_x0020_16"><![endif]></span></p>
    12491245
    12501246<h1><span style='mso-spacerun:yes'> </span>Step 2: Edit image parameters</h1>
     
    12541250case set the <b style='mso-bidi-font-weight:normal'><span style='font-family:
    12551251"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
    1256 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>wavelength</span></b>
    1257 to <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1258 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1259 Calibri;mso-bidi-theme-font:minor-latin'>0.10798</span></b>. We will be
    1260 determining the calibration values of all the checked items. In this case
    1261 wavelength is known (‘Penetration’ is a correction for x-ray penetration into
    1262 the detector; it is only needed when the detector is close to the sample).
    1263 Under certain circumstances it may be useful to restrict the calibration to
    1264 fewer parameters (i.e. if distance is presumed to be “known”) in which case you
    1265 can uncheck some of the calibration parameters and use their fixed values. It
    1266 is also helpful to change the display of the image so that it is easier to see
    1267 the diffraction rings. Lowering the maximum intensity to 10,000 to 20,000
    1268 counts will help (note that this can be done by moving the slider, or by typing
    1269 a value in the box and then clicking on another control or pressing the <b
     1252minor-latin;mso-bidi-theme-font:minor-latin'>wavelength</span></b> to <b
    12701253style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1271 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1272 Calibri;mso-bidi-theme-font:minor-latin'>Enter</span></b> or <b
    1273 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1274 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1275 Calibri;mso-bidi-theme-font:minor-latin'>Tab</span></b> key). You may also wish
    1276 to select another color scheme using the <b style='mso-bidi-font-weight:normal'><span
     1254mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1255minor-latin'>0.10798</span></b>. We will be determining the calibration values
     1256of all the checked items. In this case wavelength is known (‘Penetration’ is a
     1257correction for x-ray penetration into the detector; it is only needed when the
     1258detector is close to the sample). Under certain circumstances it may be useful
     1259to restrict the calibration to fewer parameters (i.e. if distance is presumed
     1260to be “known”) in which case you can uncheck some of the calibration parameters
     1261and use their fixed values. It is also helpful to change the display of the
     1262image so that it is easier to see the diffraction rings. Lowering the maximum
     1263intensity to 10,000 to 20,000 counts will help (note that this can be done by
     1264moving the slider, or by typing a value in the box and then clicking on another
     1265control or pressing the <b style='mso-bidi-font-weight:normal'><span
    12771266style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1278 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1279 minor-latin'>Color bar</span></b> selector. </p>
     1267mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Enter</span></b>
     1268or <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1269mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1270minor-latin'>Tab</span></b> key). You may also wish to select another color
     1271scheme using the <b style='mso-bidi-font-weight:normal'><span style='font-family:
     1272"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
     1273minor-latin;mso-bidi-theme-font:minor-latin'>Color bar</span></b> selector. </p>
    12801274
    12811275<h1><span style='mso-spacerun:yes'> </span>Step 3: Calibrate</h1>
     
    12841278
    12851279<p class=MsoNormal><span style='mso-spacerun:yes'>   </span>Set the material
    1286 used as a sample in the box labeled <span class=SpellE><b style='mso-bidi-font-weight:
    1287 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1288 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1289 mso-bidi-theme-font:minor-latin'>Calibrant</span></b></span>; select <b
    1290 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1291 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1292 Calibri;mso-bidi-theme-font:minor-latin'>LaB6 SRM660a</span></b></p>
     1280used as a sample in the box labeled <b style='mso-bidi-font-weight:normal'><span
     1281style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
     1282mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Calibrant</span></b>;
     1283select <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1284mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1285minor-latin'>LaB6 SRM660a</span></b></p>
    12931286
    12941287<h3>Second: </h3>
     
    12961289<p class=MsoNormal><span style='mso-spacerun:yes'>   </span>Use the <b
    12971290style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1298 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1299 Calibri;mso-bidi-theme-font:minor-latin'>Operations/Calibrate</span></b> menu
    1300 item (note this menu is on the <b style='mso-bidi-font-weight:normal'><span
     1291mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1292minor-latin'>Calibration/Calibrate</span></b> menu item. At this point the
     1293status line on the bottom of the <b style='mso-bidi-font-weight:normal'><span
    13011294style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1302 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1303 minor-latin'>Image Controls</span></b> window or for the Mac, the <b
    1304 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1305 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1306 Calibri;mso-bidi-theme-font:minor-latin'>Image Controls</span></b> window must
    1307 be active to place this into the system menu bar). At this point the status
    1308 line on the bottom of the <b style='mso-bidi-font-weight:normal'><span
    1309 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1310 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1311 minor-latin'>Image Controls</span></b> window changes with a prompt to select
    1312 points for calibration.</p>
     1295mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Image
     1296Controls</span></b> window changes with a prompt to select points for
     1297calibration.</p>
    13131298
    13141299<h3>Third: </h3>
     
    13181303is defined, a red &quot;<b style='mso-bidi-font-weight:normal'><span
    13191304style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1320 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1321 minor-latin;color:red'>+</span></b>&quot; is added to the plot. You need not
    1322 hit the ring exactly as the code will search for the locally highest point in a
    1323 40x40 pixel box. (On the Mac with a two or three button mouse, also use the
    1324 left mouse button, or with a standard Mac single-button mouse, use the regular
    1325 mouse button.)</p>
     1305mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin;color:red'>+</span></b>&quot;
     1306is added to the plot. You need not hit the ring exactly as the code will search
     1307for the locally highest point in a 40x40 pixel box. (On the Mac with a two or
     1308three button mouse, also use the left mouse button, or with a standard Mac
     1309single-button mouse, use the regular mouse button.)</p>
    13261310
    13271311<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
     
    13541338ensemble of rings is refitted to the detector parameters and the rings are then
    13551339shown in blue. The beam position (blue “<span style='font-family:"Calibri",sans-serif;
    1356 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1357 Calibri;mso-bidi-theme-font:minor-latin;color:#4F81BD;mso-themecolor:accent1'>X</span>”)
    1358 is now correctly positioned.</p>
     1340mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1341minor-latin;color:#4F81BD;mso-themecolor:accent1'>X</span>”) is now correctly
     1342positioned.</p>
    13591343
    13601344<p class=MsoNormal><span style='mso-spacerun:yes'> </span><span
     
    13711355<p class=MsoNormal>The derived calibration results are shown in the <b
    13721356style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1373 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1374 Calibri;mso-bidi-theme-font:minor-latin'>Image Controls</span></b> window.</p>
     1357mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1358minor-latin'>Image Controls</span></b> window.</p>
    13751359
    13761360<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1377  id="Picture_x0020_16" o:spid="_x0000_i1033" type="#_x0000_t75" style='width:472.5pt;
    1378  height:388.5pt;visibility:visible;mso-wrap-style:square'>
    1379  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image006.png"
     1361 id="Picture_x0020_17" o:spid="_x0000_i1033" type="#_x0000_t75" style='width:468pt;
     1362 height:315pt;visibility:visible;mso-wrap-style:square'>
     1363 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image019.png"
    13801364  o:title=""/>
    1381 </v:shape><![endif]--><![if !vml]><img border=0 width=630 height=518
    1382 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image006.png"
    1383 v:shapes="Picture_x0020_16"><![endif]></span><span
     1365</v:shape><![endif]--><![if !vml]><img border=0 width=624 height=420
     1366src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image020.png"
     1367v:shapes="Picture_x0020_17"><![endif]></span><span
    13841368style='mso-spacerun:yes'> </span></p>
    13851369
     
    14171401</span>To see the actual points selected by the program, click on the <b
    14181402style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1419 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1420 Calibri;mso-bidi-theme-font:minor-latin'>show ring picks?</span></b> check box </p>
     1403mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1404minor-latin'>show ring picks?</span></b> check box </p>
    14211405
    14221406<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
     
    14371421minor-latin;mso-hansi-theme-font:minor-latin'>10</span></b> and using the <b
    14381422style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1439 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1440 Calibri;mso-bidi-theme-font:minor-latin'>Operations/Recalibrate</span></b> menu
    1441 item. Also notice that the right edge of the image shows a ragged fit to the
    1442 rings because of an intensity falloff. This can be removed by placing a frame
    1443 mask about the “good” part of the pattern. Select the <b style='mso-bidi-font-weight:
    1444 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1445 minor-latin;mso-hansi-theme-font:minor-latin'>Masks</span></b> GSAS-II data
    1446 tree item.</p>
     1423mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1424minor-latin'>Calibration/Recalibrate</span></b> menu item. Also notice that the
     1425right edge of the image shows a ragged fit to the rings because of an intensity
     1426falloff. This can be removed by placing a frame mask about the “good” part of
     1427the pattern. Select the <b style='mso-bidi-font-weight:normal'><span
     1428style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
     1429mso-hansi-theme-font:minor-latin'>Masks</span></b> GSAS-II data tree item.</p>
    14471430
    14481431<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1449  id="Picture_x0020_19" o:spid="_x0000_i1030" type="#_x0000_t75" style='width:297.75pt;
    1450  height:99.75pt;visibility:visible;mso-wrap-style:square'>
    1451  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image009.png"
     1432 id="_x0000_i1030" type="#_x0000_t75" style='width:468pt;height:165pt;
     1433 visibility:visible;mso-wrap-style:square'>
     1434 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image021.png"
    14521435  o:title=""/>
    1453 </v:shape><![endif]--><![if !vml]><img border=0 width=397 height=133
    1454 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image009.png"
    1455 v:shapes="Picture_x0020_19"><![endif]></span></p>
     1436</v:shape><![endif]--><![if !vml]><img border=0 width=624 height=220
     1437src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image022.png"
     1438v:shapes="_x0000_i1030"><![endif]></span></p>
    14561439
    14571440<p class=MsoNormal>The instruction in the status bar of this frame tells you
     
    14841467
    14851468<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1486  id="Picture_x0020_14" o:spid="_x0000_i1028" type="#_x0000_t75" style='width:337.5pt;
    1487  height:135pt;visibility:visible;mso-wrap-style:square'>
    1488  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image011.png"
     1469 id="Picture_x0020_19" o:spid="_x0000_i1028" type="#_x0000_t75" style='width:468pt;
     1470 height:165pt;visibility:visible;mso-wrap-style:square'>
     1471 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image023.png"
    14891472  o:title=""/>
    1490 </v:shape><![endif]--><![if !vml]><img border=0 width=450 height=180
    1491 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image011.png"
    1492 v:shapes="Picture_x0020_14"><![endif]></span></p>
     1473</v:shape><![endif]--><![if !vml]><img border=0 width=624 height=220
     1474src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image024.png"
     1475v:shapes="Picture_x0020_19"><![endif]></span></p>
    14931476
    14941477<p class=MsoNormal>Now go back to the <b style='mso-bidi-font-weight:normal'><span
     
    14961479mso-hansi-theme-font:minor-latin'>Image Controls</span></b> tree item and do <b
    14971480style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1498 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1499 Calibri;mso-bidi-theme-font:minor-latin'>Operations/Recalibrate</span></b>; a
    1500 better calibration will result.</p>
     1481mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1482minor-latin'>Calibration/Recalibrate</span></b>; a better calibration will
     1483result.</p>
    15011484
    15021485<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1503  id="Picture_x0020_20" o:spid="_x0000_i1027" type="#_x0000_t75" style='width:525pt;
    1504  height:450pt;visibility:visible;mso-wrap-style:square'>
     1486 id="_x0000_i1027" type="#_x0000_t75" style='width:525pt;height:450pt;
     1487 visibility:visible;mso-wrap-style:square'>
    15051488 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image012.png"
    15061489  o:title=""/>
    15071490</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
    15081491src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image012.png"
     1492v:shapes="_x0000_i1027"><![endif]></span></p>
     1493
     1494<p class=MsoNormal>Notice that the frame defined the calibration region.</p>
     1495
     1496<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
     1497 id="Picture_x0020_20" o:spid="_x0000_i1026" type="#_x0000_t75" style='width:468pt;
     1498 height:306pt;visibility:visible;mso-wrap-style:square'>
     1499 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image025.png"
     1500  o:title=""/>
     1501</v:shape><![endif]--><![if !vml]><img border=0 width=624 height=408
     1502src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image026.png"
    15091503v:shapes="Picture_x0020_20"><![endif]></span></p>
    1510 
    1511 <p class=MsoNormal>Notice that the frame defined the calibration region.</p>
    1512 
    1513 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
    1514  id="Picture_x0020_17" o:spid="_x0000_i1026" type="#_x0000_t75" style='width:472.5pt;
    1515  height:388.5pt;visibility:visible;mso-wrap-style:square'>
    1516  <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image013.png"
    1517   o:title=""/>
    1518 </v:shape><![endif]--><![if !vml]><img border=0 width=630 height=518
    1519 src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image013.png"
    1520 v:shapes="Picture_x0020_17"><![endif]></span></p>
    15211504
    15221505<p class=MsoNormal>And notice the better fit obtained (smaller chi**2 and
     
    15391522be refined. Just select the check box and do <b style='mso-bidi-font-weight:
    15401523normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
    1541 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
    1542 mso-bidi-theme-font:minor-latin'>Operations/Recalibrate</span></b>, the result
    1543 should be &gt;0 for a reasonable correction. Close examination of the outer
    1544 rings will show a small shift in the calculated rings to better match the
    1545 observed ones. Assuming that these calibration results will be applied to other
    1546 images to be later read into the same GSAS-II project, click on <b
     1524minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Calibration/Recalibrate</span></b>,
     1525the result should be &gt;0 for a reasonable correction. Close examination of
     1526the outer rings will show a small shift in the calculated rings to better match
     1527the observed ones. Assuming that these calibration results will be applied to
     1528other images to be later read into the same GSAS-II project, click on <b
    15471529style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1548 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1549 Calibri;mso-bidi-theme-font:minor-latin'>Use as default for all images</span></b>.
    1550 You may also save a copy of the calibration values to a file <span
    1551 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1552 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
     1530mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1531minor-latin'>Use as default for all images</span></b>. You may also save a copy
     1532of the calibration values to a file <span style='font-family:"Calibri",sans-serif;
     1533mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
    15531534minor-latin'>(<span class=SpellE><i style='mso-bidi-font-style:normal'>name</i><b
    1554 style='mso-bidi-font-weight:normal'>.imctrl</b></span></span>) with the <b
     1535style='mso-bidi-font-weight:normal'>.imctrl</b></span></span>) with the <span
     1536class=SpellE><b style='mso-bidi-font-weight:normal'><span style='font-family:
     1537"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
     1538minor-latin;mso-bidi-theme-font:minor-latin'>Parms</span></b></span><b
    15551539style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1556 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1557 Calibri;mso-bidi-theme-font:minor-latin'>Operations/Save Controls</span></b>
    1558 menu item. To save the project, including the now-derived calibration
    1559 information, use the <b style='mso-bidi-font-weight:normal'><span
    1560 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1561 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
    1562 minor-latin'>File/Save</span> </b><b style='mso-bidi-font-weight:normal'><span
    1563 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;
    1564 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
     1540mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1541minor-latin'>/Save Controls</span></b> menu item. To save the project,
     1542including the now-derived calibration information, use the <b style='mso-bidi-font-weight:
     1543normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
     1544minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>File/Save</span>
     1545</b><b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
     1546mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
    15651547minor-latin'>Project</span></b><span style='font-family:"Calibri",sans-serif;
    1566 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1567 Calibri;mso-bidi-theme-font:minor-latin'> </span>menu item associated with the
    1568 data tree window; as this project has not been saved before the file save
    1569 dialog will need a file name. Don’t enter the extension; it will be set to “<b
    1570 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif;
    1571 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
    1572 Calibri;mso-bidi-theme-font:minor-latin'>.<span class=SpellE>gpx</span></span></b>”.</p>
     1548mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:
     1549minor-latin'> </span>menu item associated with the data tree window; as this
     1550project has not been saved before the file save dialog will need a file name.
     1551Don’t enter the extension; it will be set to “<b style='mso-bidi-font-weight:
     1552normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:
     1553minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>.<span
     1554class=SpellE>gpx</span></span></b>”.</p>
    15731555
    15741556<h2>Next step: <span class=MsoHyperlink><span style='color:#0070C0'>Integrate
  • Tutorials/2DCalibration/Calibration of an area detector in GSAS_files/filelist.xml

    r1732 r2972  
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     19 <o:File HRef="image024.png"/>
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    1823 <o:File HRef="image014.png"/>
    1924 <o:File HRef="filelist.xml"/>
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