Add epoxy layer

topside/ecal_wAstroPixSiW.xml

@@ -97,6 +97,7 @@
         <slice material="Silicon" thickness="EcalBarrelAstroPix_SiliconThickness" sensitive="yes" limits="cal_limits"/>
         <slice material="Silicon" thickness="EcalBarrelAstroPix_ElectronicsThickness"/>
         <slice material="Copper" thickness="EcalBarrelAstroPix_CopperThickness"/>
+        <slice material="Epoxy" thickness="EcalBarrelAstroPix_EpoxyThickness"/>
         <slice material="Kapton" thickness="EcalBarrelAstroPix_KaptonThickness"/>
         <slice material="Epoxy" thickness="EcalBarrelAstroPix_EpoxyThickness"/>
         <slice material="CarbonFiber" thickness="EcalBarrelAstroPix_CarbonThickness"/>

topside/topside_defs.xml

@@ -393,7 +393,7 @@
     <constant name="EcalBarrelAstroPix_RMin" value="EcalBarrel_rmin" />
     <constant name="EcalBarrelAstroPix_Length" value="EcalBarrelLength"/>
 
-    <constant name="EcalBarrelAstroPix_SiliconThickness" value="2000*um"/>
+    <constant name="EcalBarrelAstroPix_SiliconThickness" value="500*um"/>
     <constant name="EcalBarrelAstroPix_ElectronicsThickness" value="150*um"/>
     <constant name="EcalBarrelAstroPix_CopperThickness" value="100*um"/>
     <constant name="EcalBarrelAstroPix_KaptonThickness" value="200*um"/>