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1<html>
2<head>
3   <title>EXPGUI Alumina Tutorial, part #1</title>
4</head>
5
6<style>
7A:link {text-decoration:none}
8A:vlink {text-decoration:none}
9</style>
10
11<BODY BGCOLOR="#FFFFFF"
12      topmargin="0" leftmargin="0" marginwidth="0" marginheight="0" 
13      text="#000000" link="#0033ff" vlink="#0033ff" alink="#0033ff">
14
15<?
16   include("/var/www/include/navigation.inc");
17   include("/var/www/include/utility.inc");
18?>
19<blockquote>
20
21<TABLE BORDER BGCOLOR="#FFFF40" ALIGN=RIGHT>
22<TR><TH><A  Href="index.html">Intro</A> 
23</TH><TH><A Href="alumina2.html">Next page</A>
24</TH><TH><A Href="index.html">Previous page</A>
25</TH></TR></TABLE><BR CLEAR=ALL>
26
27<CENTER>
28<H1>
29<HR noshade width="75%" size="2" align="center">
30GSAS/EXPGUI Alumina tutorial (part 1)<BR>
31Creating an Experiment File
32<HR noshade width="75%" size="2" align="center">
33</H1>
34</CENTER>
35
36For this exercise we will use the EXPGUI interface to access the
37features of GSAS.
38The method used to start EXPGUI depends on what type of computer you are
39using. On Windows, EXPGUI is typically started by clicking on the appropriate
40desktop icon, or by selecting an entry in the START menu.
41In Unix, it is typically started
42by typing the command expgui in a Unix terminal window (it is also possible
43to create icons & menu entries in some versions of Unix).
44
45<P><HR noshade width="50%" size="4" align="center"><P>
46
47<img alt="tutorial screen dump" src="1a.gif" align=RIGHT>
48In all platforms, once EXPGUI has been started,
49a GSAS Experiment (.EXP) file must be selected.
50The window shown to the right is opened when EXPGUI is started,
51where file to be used is selected.
52The .EXP file is the heart of a GSAS project. While other files
53are used by GSAS programs, all structural information and control parameters
54are contained within this file.
55<P>
56The first step in this tutorial
57is to select the directory where the al2o3001.gsa, bt1demo.ins and
58alumina.cif files were placed. Do this by clicking
59on the "Directory" button at the top of the window, or by navigating
60up and down the directory tree by clicking
61on the "&lt;Parent&gt;" or individual directory names.
62Clicking on the folder icon with an arrow on it
63(to the right of the directory button)
64has the same effect as the "&lt;Parent&gt;" entry.
65<P>
66Once the correct directory has been located, the next step is to create
67a new, empty, .EXP file.
68To do this, the file name we wish to use (corundum) is typed into
69the bottom box of the file selection window.
70Note that the capitalization you use here does not
71matter and .EXP is added by default.
72After the name has been entered press the "Read" button or
73press the keyboard "Enter" key.
74<BR clear=all>
75<P><HR noshade width="50%" size="4" align="center"><P>
76<img alt="tutorial screen dump" src="1b.gif" align=RIGHT>
77To make sure that you really intend to create a new Experiment file,
78rather than the more common task of opening a previous file, the
79warning message to the right is displayed and you must click on the "Create"
80button to continue.
81<BR clear=all>
82<P><HR noshade width="50%" size="4" align="center"><P>
83<img alt="tutorial screen dump" src="1c.gif" align=RIGHT>
84At this point, you are prompted to provide an overall title for the experiment
85file. Enter anything you would like (preferably something that will remind
86you what you were doing a year from now, when you try to figure out what
87this strange file was for. When you have finished entering information, press
88the "Set" button.
89<BR clear=all>
90<P><HR noshade width="50%" size="4" align="center"><P>
91At this point, the Experiment file, CORUNDUM.EXP, has been created
92and EXPGUI displays what (little) information can be found in this file, as is
93seen below:
94<P><img alt="tutorial screen dump" src="1d.gif"><BR clear=all><P>
95Note that the title is displayed near the top of the window in a "edit"
96box -- this title can be changed simply by typing into the box.
97Above the title is the last "history record." GSAS
98records a history record each time a program is run that modifies
99the .EXP file and this information is displayed here.
100In the next step we will start adding information to this experiment file.
101<BR clear=all>
102<HR>
103Previous: <A HREF="index.html">
104Introduction</A>
105<BR>
106Next step: <A HREF="alumina2.html">
107Add a phase to the Experiment</A>
108
109<HR>
110</blockquote>
111<P><font size=-1><A HREF="MAILTO:crystal@NIST.gov?subject=WWW page <?=$PHP_SELF?>">Comments, corrections or questions: crystal@NIST.gov</A></font><BR>
112<font size=-1><? lastmod(); ?> 
113<BR>$Revision: 930 $ $Date: 2009-12-04 23:14:35 +0000 (Fri, 04 Dec 2009) $</font>
114</body>
115</html>
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