diff -u -r1.2 -r1.3
--- TPCTest.xml	20 Jul 2011 21:53:58 -0000	1.2
+++ TPCTest.xml	8 Sep 2011 07:27:47 -0000	1.3
@@ -26,7 +26,7 @@

   <detectors>
     <detector id="1" name="TPCTest" type="TPC" readout="TPCHits">
          <dimensions inner_r = "100.0*cm" outer_z = "150.0*cm" />

-         <position z="10.0" /> <!-- Just a simple test of z displacement. -->

+         <position z="500.0" /> <!-- Just a simple test of z displacement. -->

          <layer repeat="10">
            <slice material="Nitrogen" thickness="1.0*cm" sensitive="yes" />
          </layer>