hps-detectors/detectors/HPS-Test-JLAB-v3pt1

diff -u -r1.2 -r1.3
--- compact.xml	17 Oct 2011 20:09:30 -0000	1.2
+++ compact.xml	17 Oct 2011 20:24:41 -0000	1.3
@@ -6,13 +6,6 @@

         <comment>HPS Test Proposal detector</comment>
     </info>
 

-    <!-->
-       Changes since v3.0:
-		 Redefined "Air" to be a very low density gas (vacuum). 
-		 Updated box dipole geometry to match what is described 
-		 in the HPS Test proposal.
-	 -->
-

     <define>
         
         <!-- world -->

@@ -54,13 +47,10 @@

     
     <materials>
 

-
-        <material name="Air">
-           <D type="density" unit="g/cm3" value="0.0012"/>
-			  <fraction n="0.754" ref="N"/>
-           <fraction n="0.234" ref="O"/>
-			  <fraction n="0.012" ref="Ar"/> 
-		  </material>

+        <material name="TrackingMaterial">
+            <D type="density" unit="g/cm3" value="0.0000000001"/>
+            <fraction n="1.0" ref="Air" />
+        </material>

 
         <material name="LeadTungstate">
             <D value="8.28" unit="g/cm3"/>