- Timestamp:
- Apr 19, 2017 10:17:54 AM (6 years ago)
- Location:
- Tutorials/SAsize
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Tutorials/SAsize/Small Angle Size Distribution.htm
r2390 r2790 24 24 <o:DocumentProperties> 25 25 <o:Author>Von Dreele</o:Author> 26 <o:LastAuthor> Von Dreele</o:LastAuthor>27 <o:Revision>1 4</o:Revision>28 <o:TotalTime>19 17</o:TotalTime>26 <o:LastAuthor>vondreele</o:LastAuthor> 27 <o:Revision>16</o:Revision> 28 <o:TotalTime>1960</o:TotalTime> 29 29 <o:Created>2014-03-20T16:54:00Z</o:Created> 30 <o:LastSaved>201 6-07-28T18:49:00Z</o:LastSaved>30 <o:LastSaved>2017-04-19T15:00:00Z</o:LastSaved> 31 31 <o:Pages>1</o:Pages> 32 <o:Words>127 2</o:Words>33 <o:Characters>72 51</o:Characters>32 <o:Words>1274</o:Words> 33 <o:Characters>7265</o:Characters> 34 34 <o:Company>Argonne National Laboratory</o:Company> 35 35 <o:Lines>60</o:Lines> 36 36 <o:Paragraphs>17</o:Paragraphs> 37 <o:CharactersWithSpaces>85 06</o:CharactersWithSpaces>37 <o:CharactersWithSpaces>8522</o:CharactersWithSpaces> 38 38 <o:Version>16.00</o:Version> 39 39 </o:DocumentProperties> … … 48 48 <!--[if gte mso 9]><xml> 49 49 <w:WordDocument> 50 <w:View>Print</w:View> 50 51 <w:SpellingState>Clean</w:SpellingState> 51 52 <w:GrammarState>Clean</w:GrammarState> … … 660 661 /* Font Definitions */ 661 662 @font-face 662 {font-family:"Cambria Math";663 panose-1:2 4 5 3 5 4 6 3 2 4;664 mso-font-charset:1;665 mso-generic-font-family:roman;666 mso-font-pitch:variable;667 mso-font-signature:0 0 0 0 0 0;}668 @font-face669 663 {font-family:Calibri; 670 664 panose-1:2 15 5 2 2 2 4 3 2 4; … … 672 666 mso-generic-font-family:swiss; 673 667 mso-font-pitch:variable; 674 mso-font-signature:-5368 70145 1073786111 1 0 4150;}668 mso-font-signature:-536859905 -1073732485 9 0 511 0;} 675 669 @font-face 676 670 {font-family:Tahoma; … … 1084 1078 {mso-style-name:""; 1085 1079 mso-spl-e:yes;} 1080 span.GramE 1081 {mso-style-name:""; 1082 mso-gram-e:yes;} 1086 1083 .MsoChpDefault 1087 1084 {mso-style-type:export-only; … … 1179 1176 mso-ascii-theme-font:minor-latin; 1180 1177 mso-hansi-font-family:Calibri; 1181 mso-hansi-theme-font:minor-latin;} 1178 mso-hansi-theme-font:minor-latin; 1179 mso-bidi-font-family:"Times New Roman"; 1180 mso-bidi-theme-font:minor-bidi;} 1182 1181 table.MsoTableGrid 1183 1182 {mso-style-name:"Table Grid"; … … 1218 1217 <p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'>In 1219 1218 this tutorial you will determine the size distribution of particles in an 1220 alumina polishing powder using data from a constant wavelength synchrotron X-ray1221 USAXS instrument. You will use both Maximum Entropy (<span class=SpellE>MaxEnt</span>)1219 alumina polishing powder using data from a constant wavelength synchrotron 1220 X-ray USAXS instrument. You will use both Maximum Entropy (<span class=SpellE>MaxEnt</span>) 1222 1221 and Total Non-Negative Least Squares (TNNLS) methods assuming spherical 1223 1222 particles. The data were collected from <span style='mso-fareast-font-family: … … 1238 1237 style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Use 1239 1238 the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1240 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi- font-family:1241 Calibri;mso-bidi-theme-font:minor-latin'>Import/Small Angle Data/from q (A-1) 1242 step X-ray QIE data file</span></b> menu item to read the data file into 1243 GSAS-II. This read option is set to read three column small angle scattering 1244 data (SASD) as Q in Å<sup>-1</sup>, intensity and estimated standard deviation 1245 in intensity; there may be a header with metadata information in the front of 1246 this file.<spanstyle='mso-spacerun:yes'> </span>Change the file directory to <span1239 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1240 minor-latin'>Import/Small Angle Data/from q (A-1) step X-ray QIE data file</span></b> 1241 menu item to read the data file into GSAS-II. This read option is set to read 1242 three column small angle scattering data (SASD) as Q in Å<sup>-1</sup>, 1243 intensity and estimated standard deviation in intensity; there may be a header 1244 with metadata information in the front of this file.<span 1245 style='mso-spacerun:yes'> </span>Change the file directory to <span 1247 1246 class=SpellE><b style='mso-bidi-font-weight:normal'><span style='font-family: 1248 1247 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1249 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>SAsize</span></b></span><b 1250 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1251 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1252 Calibri;mso-bidi-theme-font:minor-latin'>/data</span></b><span 1253 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1254 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1248 minor-latin;mso-bidi-theme-font:minor-latin'>SAsize</span></b></span><b 1249 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1250 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1251 minor-latin'>/data</span></b><span style='font-family:"Calibri",sans-serif; 1252 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1255 1253 minor-latin'> to find the file</span>; you will have to select the <b 1256 1254 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; … … 1262 1260 style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Select 1263 1261 the <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1264 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1265 Calibri;mso-bidi-theme-font:minor-latin'>alumina data.dat</span></b><span 1266 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1267 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1262 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1263 minor-latin'>alumina data.dat</span></b><span style='font-family:"Calibri",sans-serif; 1264 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1268 1265 minor-latin'> data</span> file in the first dialog and press <b 1269 1266 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1270 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1271 Calibri;mso-bidi-theme-font:minor-latin'>Open</span></b>. There will be a 1272 Dialog box asking <b style='mso-bidi-font-weight:normal'><span 1273 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1274 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1267 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1268 minor-latin'>Open</span></b>. There will be a Dialog box asking <b 1269 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1270 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1275 1271 minor-latin'>Is this the file you want?</span></b> Press <b style='mso-bidi-font-weight: 1276 1272 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1277 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi- font-family:Calibri;1278 mso-bidi-theme-font:minor-latin'>Yes</span></b>button to proceed.</p>1273 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Yes</span></b> 1274 button to proceed.</p> 1279 1275 1280 1276 <p class=MsoNormal>At this point the <b style='mso-bidi-font-weight:normal'><span 1281 1277 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1282 mso-hansi-theme-font:minor-latin;mso-bidi- font-family:Calibri;mso-bidi-theme-font:1283 minor-latin'>GSAS-II data tree</span></b> window will have several entries and 1284 the plot window will show theSASD pattern as a log-log plot of intensity vs. Q</p>1278 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>GSAS-II data 1279 tree</span></b> window will have several entries and the plot window will show 1280 the SASD pattern as a log-log plot of intensity vs. Q</p> 1285 1281 1286 1282 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype … … 1304 1300 <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> 1305 1301 <o:lock v:ext="edit" aspectratio="t"/> 1306 </v:shapetype><v:shape id=" Picture_x0020_15" o:spid="_x0000_i1038" type="#_x0000_t75"1307 style='width:525pt;height:450pt;visibility:visible;mso-wrap-style:square'>1302 </v:shapetype><v:shape id="_x0000_i1038" type="#_x0000_t75" style='width:525pt; 1303 height:450pt;visibility:visible;mso-wrap-style:square'> 1308 1304 <v:imagedata src="Small%20Angle%20Size%20Distribution_files/image001.png" 1309 1305 o:title=""/> 1310 1306 </v:shape><![endif]--><![if !vml]><img width=700 height=600 1311 src="Small%20Angle%20Size%20Distribution_files/image001.png" v:shapes=" Picture_x0020_15"><![endif]></span></p>1307 src="Small%20Angle%20Size%20Distribution_files/image001.png" v:shapes="_x0000_i1038"><![endif]></span></p> 1312 1308 1313 1309 <h2>Step 2: Set Limits</h2> … … 1340 1336 1341 1337 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1342 id="Picture_x0020_ 2" o:spid="_x0000_i1037" type="#_x0000_t75" style='width:225pt;1343 height: 195pt;visibility:visible;mso-wrap-style:square'>1338 id="Picture_x0020_15" o:spid="_x0000_i1037" type="#_x0000_t75" style='width:225pt; 1339 height:96.75pt;visibility:visible;mso-wrap-style:square'> 1344 1340 <v:imagedata src="Small%20Angle%20Size%20Distribution_files/image002.png" 1345 1341 o:title=""/> 1346 </v:shape><![endif]--><![if !vml]><img width=300 height= 2601347 src="Small%20Angle%20Size%20Distribution_files/image002.png" v:shapes="Picture_x0020_ 2"><![endif]></span><span1342 </v:shape><![endif]--><![if !vml]><img width=300 height=129 1343 src="Small%20Angle%20Size%20Distribution_files/image002.png" v:shapes="Picture_x0020_15"><![endif]></span><span 1348 1344 style='mso-spacerun:yes'> </span></p> 1349 1345 … … 1368 1364 under <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1369 1365 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>SASD alumina 1370 data.dat</span></b> from the GSAS-II tree. Then do <b style='mso-bidi-font-weight: 1371 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1372 minor-latin;mso-hansi-theme-font:minor-latin'>Edit/Load</span></b> <b 1373 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1366 data.dat</span></b> from the GSAS-II tree. Then do <span class=GramE><b 1367 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1368 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Edit</span></b></span><b 1369 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1370 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'> substance/Load</span></b> 1371 <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1374 1372 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>substance</span></b> 1375 1373 from the menu; a popup window will appear with possible selections</p> … … 1393 1391 1394 1392 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1395 id="Picture_x0020_16" o:spid="_x0000_i1035" type="#_x0000_t75" style='width:2 59.5pt;1396 height: 195pt;visibility:visible;mso-wrap-style:square'>1393 id="Picture_x0020_16" o:spid="_x0000_i1035" type="#_x0000_t75" style='width:280.5pt; 1394 height:246pt;visibility:visible;mso-wrap-style:square'> 1397 1395 <v:imagedata src="Small%20Angle%20Size%20Distribution_files/image004.png" 1398 1396 o:title=""/> 1399 </v:shape><![endif]--><![if !vml]><img width=3 46 height=2601397 </v:shape><![endif]--><![if !vml]><img width=374 height=328 1400 1398 src="Small%20Angle%20Size%20Distribution_files/image004.png" v:shapes="Picture_x0020_16"><![endif]></span><span 1401 1399 style='mso-spacerun:yes'> </span></p> … … 1403 1401 <p class=MsoNormal><o:p> </o:p></p> 1404 1402 1405 <p class=MsoNormal>If desired you can load/add as many substances as you desire1406 into this list; you can also delete any of them (except vacuum). The 1407 composition, volume occupied by the atoms in the composition and the density 1408 are given for each substance. These can each be edited; the other values will 1409 change accordingly. If your substance isnt in the list, you can <b1403 <p class=MsoNormal>If desired you can load/add as many substances as you want into 1404 this list; you can also delete any of them (except vacuum & unit scatter). 1405 The composition, volume occupied by the atoms in the composition and the 1406 density are given for each substance. These can each be edited; the other 1407 values will change accordingly. If your substance isnt in the list, you can <b 1410 1408 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1411 1409 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Edit/Add … … 1416 1414 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1417 1415 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Instrument 1418 Parameters</span></b> GSAS-II tree item if needed). The re sonant scattering1419 value isused for contrast calculations.</p>1416 Parameters</span></b> GSAS-II tree item if needed). The real density value is 1417 used for contrast calculations.</p> 1420 1418 1421 1419 <h2>Step 4: Set Sample parameters </h2> … … 1437 1435 minor-latin;mso-hansi-theme-font:minor-latin'>vacuum</span></b>). The window 1438 1436 will show at the bottom the computed contrast between alumina and vacuum 1439 without and with consideration of resonant scattering effects; the latter is used1440 in subsequent calculations.</p>1437 without and with consideration of resonant scattering effects; the latter is 1438 used in subsequent calculations.</p> 1441 1439 1442 1440 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1484 1482 1485 1483 <p class=MsoNormal>Many selections are made by default for this analysis; 1486 however it is important that an appropriate value is selected for the background.1487 From the high Q end of the data plot</p>1484 however it is important that an appropriate value is selected for the 1485 background. From the high Q end of the data plot</p> 1488 1486 1489 1487 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1503 1501 mso-hansi-theme-font:minor-latin'>0.12</span></b>; enter that into the 1504 1502 appropriate place in the data window. The plot will be redrawn showing a 1505 horizontal red line for the background. All the other parameters seem 1506 reasonable for a 1<sup>st</sup> attempt at a <span class=SpellE>MaxEnt</span> 1507 solution. Do <b style='mso-bidi-font-weight:normal'><span style='font-family: 1508 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1509 minor-latin'>Models/Fit</span></b>; the console window will show that the 1510 calculation did not converge and the <b style='mso-bidi-font-weight:normal'><span 1511 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1512 mso-hansi-theme-font:minor-latin'>Size Distribution</span></b> plot has a 1513 choppy appearance.</p> 1503 horizontal red line for the background. All the other parameters seem reasonable 1504 for a 1<sup>st</sup> attempt at a <span class=SpellE>MaxEnt</span> solution. Do 1505 <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1506 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Models/Fit</span></b>; 1507 the console window will show that the calculation did not converge and the <b 1508 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1509 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Size 1510 Distribution</span></b> plot has a choppy appearance.</p> 1514 1511 1515 1512 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1630 1627 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1631 1628 mso-hansi-theme-font:minor-latin'>2.0</span></b>; the IPG fit con<span 1632 style='mso-no-proof:yes'>verges in <20 cycles and gives a smoother size distribution.<o:p></o:p></span></p> 1629 style='mso-no-proof:yes'>verges in <20 cycles and gives a smoother size 1630 distribution.<o:p></o:p></span></p> 1633 1631 1634 1632 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape
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