source: trunk/tutorial1/nickel4.html @ 160

Last change on this file since 160 was 160, checked in by toby, 11 years ago

# on 2000/05/26 16:08:48, toby did:
GSAS Nickel tutorial in EXPGUI

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  • Property rcs:date set to 2000/05/26 16:08:48
  • Property rcs:rev set to 1.1
  • Property rcs:state set to Exp
  • 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 parameters,
30in this case to widen the range of peaks that are fit. This is done
31by selecting each histogram by selecting it in the box
32to the left. Then change the "Peak cutoff" from 0.01 (1%) to 0.005
33(0.5%) note that this change can slow down GSAS significantly, but
34is useful when the the signal-to-noise ratio is very good.
35<img src="profile1.gif">
36<BR clear=left>
37After the first histogram is modified, select the second histogram
38and modify the "Peak cutoff" there as well.
39<img src="profile2.gif">
40<BR>
41
42<BR clear=left>
43Previous step: <A HREF="nickel3.html">
44Add data (histograms) to the Experiment
45</A>
46<BR>
47Next step: <A HREF="nickel5.html">
48Run POWPREF
49</A>
50
51<BR clear=left>
52<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>)
53<BR clear=left>
54$Revision: 160 $ $Date: 2009-12-04 23:01:24 +0000 (Fri, 04 Dec 2009) $
55</body>
56</html>
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