source: trunk/tutorial1/nickel4.html @ 207

Last change on this file since 207 was 207, checked in by toby, 11 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
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  • Property rcs:rev set to 1.2
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  • Property svn:keywords set to Author Date Revision Id
File size: 1.7 KB
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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>
29The next step in the tutorial is to change a profile parameter,
30in this case to widen the range of peaks that are fit. This is done
31by switching to the Profile pane and
32selecting each histogram by selecting it in the box
33to the left. Then change the "Peak cutoff" from 0.01 (1%) to 0.005
34(0.5%). Note that this change can slow down GSAS significantly, but
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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