PSI sics-cvs-psi-2006

doc/user/tricsingle.htm

@@ -14,27 +14,11 @@ to be solved are:
 <li>Measure a couple of reflections.
 <li>Furthermore there are some specialities.
 </ul> 
-There are two ways to achieve all this: 
-The older way uses some built in SICS functionality plus some external
-programs inherited from the ILL. This is called the ILL operation. 
-Then a complete 
-four circle package called DIFRAC from P. White and Eric Gabe was 
-integrated into SICS.
-This is The Difrac way of operation.
 </p>
-<h2>DIFRAC</h2>
-<p>
-The DIFRAC commands are accessed by prepending the difrac commands
-with <b>dif</b>. For example: "dif td" calls the difrac td
-command. For more information on DIFRAC commands see the separate
-<a href="diftrics.htm">DIFRAC manual</a>.
-</p> 
-
-<h2>ILL operation</h2>
 <h3>Locate Reflections</h3>
 <p>
 If you know x-ray single crystal diffractometers you'll expect sophisticated
-reflection search procedures here. Nothing is available in this field in
+reflection search procedures here. Little is available in this field in
 SICS. It was deemed inapropriate for neutron research. The first reflections
 must be found by hand. Something which may help in this is a quick scan
 facility which allows to run a motor and print counts while the motor is
@@ -54,12 +38,27 @@ But it may help to locate the aproximate position of a peak.
 </p>
 <p>
 Once a peak has been found, its position can be optimised and centered with the 
-<a href="optimise.htm">peak optimiser</a>.
+<a href="optimise.htm">peak optimiser</a>. Dor not forget to put all
+collimators in and to close all slits before optimizing. This is in
+order to improve accuracy. 
+</p>
+<p>
+Once one reflection has been located, others might be located using the
+<a href="Conescan.html">conescan</a> method when the lattice constants
+are known.  Do not forget to open all slits and to remove all
+collimators for this. 
+</p>
+<p>
+If two reflections and the cell constants are known, a provisional UB
+matrix may be <a href="ubcalc.htm">calculated</a> with the UBCALC
+module. UBCALC can also calculate the UB matrix from three reflections
+from scratch. 
 </p>
 <P>
-The next thing to do is to store the reflection and find other ones. Once a
-few reflections have been found, the need to be written to disk. This can be
-accomplished with the object rliste which has the following subcommands:
+With a prvisional UB matrix determined it is advisable to locate and
+optimise another 20 reflections in order to do UB matrix
+refinement. During this time, reflections may be stored using the
+rliste module:
 <DL>
 <DT>rliste clear
 <DD> clears all entries from the list