source: trunk/help/Calibration of an area detector in GSAS.htm @ 1195

Last change on this file since 1195 was 1195, checked in by vondreele, 9 years ago

Add an update d-zero command
add new tutorial for strain fitting
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File size: 53.3 KB
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802</head>
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804<body lang=EN-US link="#000000" vlink=purple style='tab-interval:.5in'>
805
806<div class=WordSection1>
807
808<p class=MsoNormal><span class=Heading1Char><span style='font-size:24.0pt'>Calibration
809of an area detector in GSAS-II</span></span><b><span style='font-size:14.0pt;
810color:#365F91;mso-themecolor:accent1;mso-themeshade:191'><o:p></o:p></span></b></p>
811
812<p class=MsoNormal>In this tutorial, data collected with a Perkin-Elmer area
813detector at APS 11-ID-C with a wavelength 0.10798 A, where the detector was
814intentionally tilted at 45 degrees, are used. Note that menu entries are listed
815in bold face below as <b style='mso-bidi-font-weight:normal'><span
816style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
817mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
818minor-latin'>Help/About GSAS-II</span></b>, which lists first the name of the
819menu (here <b style='mso-bidi-font-weight:normal'><span style='font-family:
820"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
821minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>Help</span></b>)
822and second the name of the entry in the menu (here <b style='mso-bidi-font-weight:
823normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
824minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
825mso-bidi-theme-font:minor-latin'>About GSAS-II</span></b>).</p>
826
827<p class=MsoNormal>If you have not done so already, <u><span style='color:#0070C0'><a
828href="Starting%20GSAS.htm"><span style='color:windowtext;text-decoration:none;
829text-underline:none'>start GSAS-II</span></a></span></u>.</p>
830
831<h1>Step 1: read in the data file</h1>
832
833<p class=MsoNormal><span style='mso-spacerun:yes'> </span>Use the <b
834style='mso-bidi-font-weight:normal'>Data/Read image data</b> menu item to read
835the data file into the current GSAS-II project. </p>
836
837<p class=MsoNormal><span style='mso-spacerun:yes'> </span></p>
838
839<p class=MsoNormal>A file selection dialog will be shown; its appearance will
840depend on your OS. Change the search directory to <b style='mso-bidi-font-weight:
841normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
842minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
843mso-bidi-theme-font:minor-latin'>/Exercises/images</span></b> and then select
844the file </p>
845
846<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
847style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
848mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
849minor-latin'>La_hex_+45deg-00015.tif</span></b> and press <b style='mso-bidi-font-weight:
850normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
851minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
852mso-bidi-theme-font:minor-latin'>Open</span></b>.<span style='mso-no-proof:
853yes'> <o:p></o:p></span></p>
854
855<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype
856 id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t"
857 path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f">
858 <v:stroke joinstyle="miter"/>
859 <v:formulas>
860  <v:f eqn="if lineDrawn pixelLineWidth 0"/>
861  <v:f eqn="sum @0 1 0"/>
862  <v:f eqn="sum 0 0 @1"/>
863  <v:f eqn="prod @2 1 2"/>
864  <v:f eqn="prod @3 21600 pixelWidth"/>
865  <v:f eqn="prod @3 21600 pixelHeight"/>
866  <v:f eqn="sum @0 0 1"/>
867  <v:f eqn="prod @6 1 2"/>
868  <v:f eqn="prod @7 21600 pixelWidth"/>
869  <v:f eqn="sum @8 21600 0"/>
870  <v:f eqn="prod @7 21600 pixelHeight"/>
871  <v:f eqn="sum @10 21600 0"/>
872 </v:formulas>
873 <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/>
874 <o:lock v:ext="edit" aspectratio="t"/>
875</v:shapetype><v:shape id="Picture_x0020_1" o:spid="_x0000_i1032" type="#_x0000_t75"
876 style='width:300pt;height:187.5pt;visibility:visible;mso-wrap-style:square'>
877 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image001.png"
878  o:title=""/>
879</v:shape><![endif]--><![if !vml]><img border=0 width=400 height=250
880src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image001.png"
881v:shapes="Picture_x0020_1"><![endif]></span></p>
882
883<p class=MsoNormal>At this point the data tree window will have several
884entries; the highlighted one specifies the contents of the data window as <b
885style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
886mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
887Calibri;mso-bidi-theme-font:minor-latin'>Image Controls</span><o:p></o:p></b></p>
888
889<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
890 id="Picture_x0020_10" o:spid="_x0000_i1031" type="#_x0000_t75" style='width:471.75pt;
891 height:349.5pt;visibility:visible;mso-wrap-style:square'>
892 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image002.png"
893  o:title=""/>
894</v:shape><![endif]--><![if !vml]><img border=0 width=629 height=466
895src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image002.png"
896v:shapes="Picture_x0020_10"><![endif]></span></p>
897
898<p class=MsoNormal><span style='mso-spacerun:yes'> </span>The plot window shows
899the image; notice the elliptical shape of the powder diffraction rings due to
900the 45 degree detector tilt. The blue <b style='mso-bidi-font-weight:normal'><span
901style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
902mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
903minor-latin;color:#4F81BD;mso-themecolor:accent1'>X</span></b> marks the beam
904location (which defaults to the image center); the calibration you will perform
905here will find the correct placement for it. Also note that as the mouse is
906moved across the plot the plot window status bar (at bottom of plot window)
907shows the cursor position, as computed from the default (incorrect) calibration
908values. These constants will be correctly determined after you finish the
909calibration.</p>
910
911<p class=MsoNormal><span style='mso-spacerun:yes'> </span><span
912style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_3"
913 o:spid="_x0000_i1030" type="#_x0000_t75" style='width:525pt;height:450pt;
914 visibility:visible;mso-wrap-style:square'>
915 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image003.png"
916  o:title=""/>
917</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
918src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image003.png"
919v:shapes="Picture_x0020_3"><![endif]></span></p>
920
921<h1><span style='mso-spacerun:yes'> </span>Step 2: Edit image parameters</h1>
922
923<p class=MsoNormal><span style='mso-spacerun:yes'> </span>Note that, alas, very
924few image formats contain all of the important metadata about the image, so it
925needs to be added manually. In this case set the <b style='mso-bidi-font-weight:
926normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
927minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
928mso-bidi-theme-font:minor-latin'>wavelength</span></b> to <b style='mso-bidi-font-weight:
929normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
930minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
931mso-bidi-theme-font:minor-latin'>0.10798</span></b>. It is also helpful to
932change the display of the image so that it is easier to see the diffraction
933rings. Lowering the maximum intensity to 10,000 to 20,000 counts will help
934(note that this can be done by moving the <span class=GramE>slider,</span> or
935by typing a value in the box and then clicking on another control or pressing
936the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
937mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
938Calibri;mso-bidi-theme-font:minor-latin'>Enter</span></b> or <b
939style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
940mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
941Calibri;mso-bidi-theme-font:minor-latin'>Tab</span></b> key). You may also wish
942to select another color scheme using the <b style='mso-bidi-font-weight:normal'><span
943style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
944mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
945minor-latin'>Color bar</span></b> selector. </p>
946
947<h1><span style='mso-spacerun:yes'> </span>Step 3: Calibrate</h1>
948
949<h3><span style='mso-spacerun:yes'> </span>First: </h3>
950
951<p class=MsoNormal><span style='mso-spacerun:yes'>   </span>Set the material
952used as a sample in the box labeled <span class=SpellE><b style='mso-bidi-font-weight:
953normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
954minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
955mso-bidi-theme-font:minor-latin'>Calibrant</span></b></span>; select <b
956style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
957mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
958Calibri;mso-bidi-theme-font:minor-latin'>LaB6 SRM660a</span></b></p>
959
960<h3>Second: </h3>
961
962<p class=MsoNormal><span style='mso-spacerun:yes'>   </span>Use the <b
963style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
964mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
965Calibri;mso-bidi-theme-font:minor-latin'>Operations/Calibrate</span></b> menu
966item (note this menu is on the <b style='mso-bidi-font-weight:normal'><span
967style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
968mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
969minor-latin'>Image Controls</span></b> window or for the Mac, the <span
970class=GramE><b style='mso-bidi-font-weight:normal'><span style='font-family:
971"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
972minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>Image<span
973style='mso-spacerun:yes'>  </span>Controls</span></b></span> window must be
974active to place this into the system menu bar). At this point the status line
975on the bottom of the <b style='mso-bidi-font-weight:normal'><span
976style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
977mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
978minor-latin'>Image Controls</span></b> window changes with a prompt to select
979points for calibration.</p>
980
981<h3>Third: </h3>
982
983<p class=MsoNormal><span style='mso-spacerun:yes'>  </span>Use the left mouse
984button to click on at least five locations on the innermost ring. As each point
985is defined, a red &quot;<b style='mso-bidi-font-weight:normal'><span
986style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
987mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
988minor-latin;color:red'>+</span></b>&quot; is added to the plot. You need not
989hit the ring exactly as the code will search for the locally highest point. (On
990the Mac with a two or three button mouse, also use the left mouse button, or
991with a standard Mac single-button mouse, use the regular mouse button.)</p>
992
993<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
994 id="Picture_x0020_8" o:spid="_x0000_i1029" type="#_x0000_t75" style='width:525pt;
995 height:450pt;visibility:visible;mso-wrap-style:square'>
996 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image004.png"
997  o:title=""/>
998</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
999src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image004.png"
1000v:shapes="Picture_x0020_8"><![endif]></span></p>
1001
1002<p class=MsoNormal><span style='mso-spacerun:yes'>  </span>To remove a point
1003added in error click on that point with the right mouse button (on the Mac, if
1004you have a single-button mouse, hold the control key down and click). </p>
1005
1006<h3><span style='mso-spacerun:yes'> </span>Fourth:</h3>
1007
1008<p class=MsoNormal><span style='mso-spacerun:yes'>  </span>When done, press the
1009right mouse button well away from any points that have been added (on the Mac,
1010if you have a single-button mouse, hold the control key down and click). </p>
1011
1012<p class=MsoNormal>The calibration is then performed. First the rings are
1013located and an ellipse is optimized for each ring. The indexed rings are first
1014shown in red as the calibration proceeds and center of each ellipse is noted
1015with a blue &quot;<b style='mso-bidi-font-weight:normal'><span
1016style='color:#4F81BD;mso-themecolor:accent1'>+</span></b>&quot;. When all rings
1017have been fitted, the entire ensemble of rings is refitted to the detector
1018parameters and the rings are then shown in blue. The beam position (blue “<span
1019style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1020mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
1021minor-latin;color:#4F81BD;mso-themecolor:accent1'>X</span>”) is now correctly
1022positioned.</p>
1023
1024<p class=MsoNormal><span style='mso-spacerun:yes'> </span><span
1025style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_9"
1026 o:spid="_x0000_i1028" type="#_x0000_t75" style='width:525pt;height:450pt;
1027 visibility:visible;mso-wrap-style:square'>
1028 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image005.png"
1029  o:title=""/>
1030</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
1031src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image005.png"
1032v:shapes="Picture_x0020_9"><![endif]></span><span
1033style='mso-spacerun:yes'> </span></p>
1034
1035<p class=MsoNormal>The derived calibration results are shown in the <b
1036style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1037mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
1038Calibri;mso-bidi-theme-font:minor-latin'>Image Controls</span></b> window.</p>
1039
1040<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
1041 id="Picture_x0020_11" o:spid="_x0000_i1027" type="#_x0000_t75" style='width:471.75pt;
1042 height:349.5pt;visibility:visible;mso-wrap-style:square'>
1043 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image006.png"
1044  o:title=""/>
1045</v:shape><![endif]--><![if !vml]><img border=0 width=629 height=466
1046src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image006.png"
1047v:shapes="Picture_x0020_11"><![endif]></span><span
1048style='mso-spacerun:yes'> </span></p>
1049
1050<p class=MsoNormal><span class=GramE>and</span> the console window shows
1051details of the fit.</p>
1052
1053<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
1054 id="Picture_x0020_13" o:spid="_x0000_i1026" type="#_x0000_t75" style='width:453.75pt;
1055 height:107.25pt;visibility:visible;mso-wrap-style:square'>
1056 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image007.png"
1057  o:title=""/>
1058</v:shape><![endif]--><![if !vml]><img border=0 width=605 height=143
1059src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image007.png"
1060v:shapes="Picture_x0020_13"><![endif]></span></p>
1061
1062<p class=MsoNormal>The <b style='mso-bidi-font-weight:normal'><span
1063style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1064mso-hansi-theme-font:minor-latin'>distance</span></b> is from the sample to the
1065plane containing the detector, <span class=SpellE><b style='mso-bidi-font-weight:
1066normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
1067minor-latin;mso-hansi-theme-font:minor-latin'>det</span></b></span><b
1068style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1069mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>-x</span></b>
1070&amp; <span class=SpellE><b style='mso-bidi-font-weight:normal'><span
1071style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1072mso-hansi-theme-font:minor-latin'>det</span></b></span><b style='mso-bidi-font-weight:
1073normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
1074minor-latin;mso-hansi-theme-font:minor-latin'>-y</span></b> is the incident
1075beam location on the image, <b style='mso-bidi-font-weight:normal'><span
1076style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1077mso-hansi-theme-font:minor-latin'>tilt</span></b> is the angle of detector
1078rotation from being normal to the incident beam and <b style='mso-bidi-font-weight:
1079normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
1080minor-latin;mso-hansi-theme-font:minor-latin'>phi</span></b> is the rotation of
1081the detector tilt axis from the x-axis. <span
1082style='mso-spacerun:yes'> </span>To see the actual points selected by the
1083program, click on the <b style='mso-bidi-font-weight:normal'><span
1084style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1085mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
1086minor-latin'>show ring picks?</span></b> <span class=GramE>check</span> box </p>
1087
1088<p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
1089 id="Picture_x0020_14" o:spid="_x0000_i1025" type="#_x0000_t75" style='width:525pt;
1090 height:450pt;visibility:visible;mso-wrap-style:square'>
1091 <v:imagedata src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image008.png"
1092  o:title=""/>
1093</v:shape><![endif]--><![if !vml]><img border=0 width=700 height=600
1094src="Calibration%20of%20an%20area%20detector%20in%20GSAS_files/image008.png"
1095v:shapes="Picture_x0020_14"><![endif]></span><span
1096style='mso-spacerun:yes'> </span><span style='color:#1F497D;mso-themecolor:
1097text2'><o:p></o:p></span></p>
1098
1099<p class=MsoNormal>When this is done, it sometimes occurs that the points
1100selected for the outermost rings are scattered between that and the next ring.
1101This can be repaired by changing the pixel search range to 10 and using the <b
1102style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1103mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
1104Calibri;mso-bidi-theme-font:minor-latin'>Operations/Recalibrate</span></b> menu
1105item. In cases where particular types of detectors are used close to the sample
1106and the diffraction pattern extends to near the edges of the detector, the <b
1107style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1108mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Penetration</span></b>
1109correction may need to be refined. Just select the check box and do <b
1110style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1111mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
1112Calibri;mso-bidi-theme-font:minor-latin'>Operations/Recalibrate</span></b>, the
1113result should be &gt;0 for a reasonable correction. Close examination of the
1114outer rings will show a small shift in the calculated rings to better match the
1115observed ones. Assuming that these calibration results will be applied to other
1116images in the same GSAS-II project, click on <b style='mso-bidi-font-weight:
1117normal'><span style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:
1118minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;
1119mso-bidi-theme-font:minor-latin'>Use as default for all images</span></b>. You
1120may also save a copy of the calibration values to a file <span
1121style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1122mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
1123minor-latin'>(<span class=SpellE><i style='mso-bidi-font-style:normal'>name</i><b
1124style='mso-bidi-font-weight:normal'>.imctrl</b></span></span>) with the <b
1125style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1126mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
1127Calibri;mso-bidi-theme-font:minor-latin'>Operations/Save Controls</span></b>
1128menu item. To save the project, including the now-derived calibration
1129information, use the <b style='mso-bidi-font-weight:normal'><span
1130style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1131mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
1132minor-latin'>File/Save</span> </b><b style='mso-bidi-font-weight:normal'><span
1133style='font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
1134mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
1135minor-latin'>Project</span></b><span style='font-family:"Calibri","sans-serif";
1136mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
1137Calibri;mso-bidi-theme-font:minor-latin'> </span>menu item associated with the
1138data tree window; as this project has not been saved before the file save
1139dialog will need a file name. Don’t enter the extension; it will be set to “<b
1140style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri","sans-serif";
1141mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:
1142Calibri;mso-bidi-theme-font:minor-latin'>.<span class=SpellE>gpx</span></span></b>”.</p>
1143
1144<h2>Next step: <span class=MsoHyperlink><span style='color:#0070C0'><a
1145href="Integration%20of%20area%20detector%20data%20in%20GSAS.htm"><u><span
1146style='color:black'>Integrate the Data</span></u></a></span></span></h2>
1147
1148</div>
1149
1150</body>
1151
1152</html>
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