Changeset 5324 for Tutorials/CWInstDemo

Timestamp:

Aug 28, 2022 10:40:32 AM (15 months ago)

Author:

toby

Message:

add "create inst parm" to tutorial

File:

• Tutorials/CWInstDemo/FindProfParamCW.htm (modified) (4 diffs)

Tutorials/CWInstDemo/FindProfParamCW.htm

@@ -733 +733 @@
 <div class=WordSection1>
 
-<h1><span style='mso-bidi-font-family:"Times New Roman"'>Determining Profile
-Parameters from a Standard<o:p></o:p></span></h1>
+  <h1><span style='mso-bidi-font-family:"Times New Roman"'>
+  Create Instrument Parameter File: Determine Starting Profile from a
+  Standard<o:p></o:p></span></h1>
 
 <p class=MsoNormal><o:p>&nbsp;</o:p></p>
@@ -750 +751 @@
 <p class=MsoNormal><span style='font-size:14.0pt'>The goal of this exercise is
 to determine approximate instrument profile parameters by a quick peak fit to a
-sample with a lab diffractometer. Ideally, one should use a material or mixture
+  sample with a lab diffractometer. Then in step 3.4 a new instrument
+  parameter file is created allowing these parameters to be used as
+  the starting point with other datasets. 
+  Ideally, one should use a material or mixture
 of materials that has peaks over the entire range where you collect data and
 use a material(s) that have negligible sample broadening (from crystallite size
 or <span class=SpellE>microstrain</span>). The NIST LaB<sub>6</sub> standards
-(SRM 660, 660a and 660b) are good choices for this, as it has very little
-sample broadening and a relatively small number of peaks over a wide angular
+(SRM 660, 660a and 660b) are good choices for this, as they have very little
+sample broadening and a relatively small number of peaks but over a wide angular
 range, although it would be good to have peaks starting somewhat lower in
 2theta. <o:p></o:p></span></p>
@@ -1882 +1886 @@
 peak positions have not been refined, a good fit is not to be expected. Click
 on the refine column heading to the immediate right of the peak positions, then
-select ÒY &#8211; vary allÓ and again use the Peak Fitting/<span class=SpellE>Peakfit</span>
+select "Y" and "vary all" and again use the Peak Fitting/<span class=SpellE>Peakfit</span>
 menu command. The fit improves significantly with an <span class=SpellE>Rwp</span>
 value of ~8%. The fit shows very small difference plot:<o:p></o:p></span></p>
@@ -1933 +1937 @@
 
 <p class=MsoNormal><span style='font-size:14.0pt'>Select the Instrument
-Parameter tree entry and then use the Operations/Save ProfileÉ menu command to
+Parameter tree entry and then use the Operations/Save Profile... menu command to
 write a file. This can be used as the starting point for future refinements.
 The plot shown at this point compares the mostly meaningless default starting
 profile terms (as solid lines) to the fit here (as dashed lines). Using Operations/Load
-ProfileÉ resets the default values to the current refinement parameters, which
+Profile... resets the default values to the current refinement parameters, which
 makes for a simpler plot. <o:p></o:p></span></p>