source: trunk/tutorial2/garnet3.html @ 170

Last change on this file since 170 was 170, checked in by toby, 11 years ago

# on 2000/05/30 22:22:38, toby did:
Garnet tutorial

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  • Property rcs:date set to 2000/05/30 22:22:38
  • Property rcs:rev set to 1.1
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  • Property svn:keywords set to Author Date Revision Id
File size: 3.5 KB
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1<html>
2<head>
3   <META NAME="Author" CONTENT="Brian H. Toby">
4   <title>EXPGUI Tutorial #3</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>EXPGUI Tutorial: Garnet  (part 3)</H1>
25</CENTER>
26<H1>
273. Add data (histogram) to the Experiment
28</H1>
29
30The next step in the tutorial is to add data. Note that
31GSAS uses the term
32histogram to refer to a powder diffraction data set.
33To add data, switch to the Histogram in EXPGUI pane and press the
34"Add New Histogram" button in the lower right.
35<img src="addhs1.gif" ALIGN=LEFT>
36This brings up the "add new histogram" dialog, to the left.
37Press on the upper "Select File" button for a dialog box to select
38a data file.
39
40<BR clear=left>
41<P><img src="addhs2a.gif" ALIGN=LEFT>
42Select the appropriate file, in this case garnet.raw and press
43the "Open" button.
44
45At this stage, different things can happen.
46If the file is not correctly formatted,
47<A HREF="../tutorial1/nickelnotes.html#reformat">a dialog will offer
48to convert the file to the correct format.</a>
49Also, in some cases, the data file specifies the name of the instrument
50parameter file. If so, that name will be loaded into the "Instrument
51Parameter file" box. If not, as in this case, the file must be selected
52by pressing the lower "Select File" button which creates a
53dialog box to select an instrument parameter file, similar
54to the one above.
55<BR clear=left>
56<P><img src="addhs3a.gif" ALIGN=LEFT>
57The appropriate instrument parameter file is then located and selected.
58Note that since only one bank of data is present in the file,
59bank 1 is selected automatically however one must know something
60about the instrument parameter file to know that bank 1 is the
61appropriate contents.
62Finally one must enter either the minimum d-space or
63maximum two-theta to be used from the data (note that
64this value can be changed later if need be from EXPEDT). A
65good wat to do this is to use
66<A HREF="../tutorial1/nickelnotes.html#rawplot">RAWPLOT</A>
67to look at the data. This is done
68by pressing the "Run RAWPLOT" button at the
69lower right <A HREF="../tutorial1/nickelnotes.html#rawplot">(example).</A>
70The GSAS tutorial in the manual suggests using 159 for this refinement.
71
72When all input is complete, press Add to run program EXPTOOL and read the
73data into the .EXP file.
74
75<BR clear=left>
76<P><img src="addhs4a.gif" ALIGN=LEFT>
77The results from the EXPTOOL are shown in a separate box, so
78that errors can be noted. After OK is pressed, the histogram
79is now listed on the Histogram pane (see below).
80
81<BR clear=left>
82<P><img src="addhs5a.gif" ALIGN=LEFT>
83<BR clear=left>
84
85<P><BR>(.EXP Snapshot:
86<A HREF="ftp://ftp.ncnr.nist.gov/pub/cryst/gsas/tutorials/garnet3.exp">
87garnet3.exp
88</A>)
89
90<BR clear=left><HR>
91Previous step: <A HREF="garnet2.html">
92Add a phase to the Experiment</A>
93<BR>
94Next step: <A HREF="garnet4.html">
95Run POWPREF and GENLES</A>
96
97<BR clear=left>
98<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>)
99<BR clear=left>
100$Revision: 170 $ $Date: 2009-12-04 23:01:34 +0000 (Fri, 04 Dec 2009) $
101</body>
102</html>
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