source: trunk/tutorial1/nickel4.html @ 498

Last change on this file since 498 was 207, checked in by toby, 12 years ago

# on 2000/06/09 03:57:42, toby did:
incorporate many useful comments by Egbert Keller

  • Property rcs:author set to toby
  • Property rcs:date set to 2000/06/09 03:57:42
  • Property rcs:lines set to +5 -4
  • Property rcs:rev set to 1.2
  • Property rcs:state set to Exp
  • Property svn:keywords set to Author Date Revision Id
File size: 1.7 KB
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[160]1<html>
2<head>
3   <META NAME="Author" CONTENT="Brian H. Toby">
4   <title>EXPGUI Tutorial #4</title>
5</head>
6<BODY BGCOLOR="#FFFFFF">
7
8<A HREF=http://www.ncnr.nist.gov>
9<IMG SRC="http://www.ncnr.nist.gov/images/ncnrtrans.gif" 
10alt="Link to NIST Center for Neutron Research home page"
11ALIGN=RIGHT></A>
12<A HREF=http://www.nist.gov>
13<IMG SRC="http://www.ncnr.nist.gov/images/webidblue_2lineright.gif" 
14alt="Link to National Institute of Standards & Technology home page"
15ALIGN=LEFT></A>
16<CENTER>
17<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html">
18<IMG SRC="tcltklogo100.gif" 
19alt="Link to Tcl/Tk information">
20</CENTER></A>
21<hr>
22
23<CENTER>
24<H1>GSAS Nickel example using EXPGUI (part 4)</H1>
25</CENTER>
26<H1>
274. Change a profile parameter
28</H1>
[207]29The next step in the tutorial is to change a profile parameter,
[160]30in this case to widen the range of peaks that are fit. This is done
[207]31by switching to the Profile pane and
32selecting each histogram by selecting it in the box
[160]33to the left. Then change the "Peak cutoff" from 0.01 (1%) to 0.005
[207]34(0.5%). Note that this change can slow down GSAS significantly, but
[160]35is useful when the the signal-to-noise ratio is very good.
36<img src="profile1.gif">
37<BR clear=left>
38After the first histogram is modified, select the second histogram
39and modify the "Peak cutoff" there as well.
40<img src="profile2.gif">
41<BR>
42
43<BR clear=left>
44Previous step: <A HREF="nickel3.html">
45Add data (histograms) to the Experiment
46</A>
47<BR>
48Next step: <A HREF="nickel5.html">
49Run POWPREF
50</A>
51
52<BR clear=left>
53<HR><p><a href="http://www.ncnr.nist.gov/staff/toby/">Brian Toby</a> (<a href="mailto:brian.toby@nist.gov">Brian.Toby@NIST.GOV</a>)
54<BR clear=left>
55$Revision: 207 $ $Date: 2009-12-04 23:02:11 +0000 (Fri, 04 Dec 2009) $
56</body>
57</html>
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