Resolve "Implement ffi_ZDC"

https://gitlab.com/eic/escalate/g4e/-/blob/master/src/subdetectors/ffi_ZDC/ffi_ZDC.hh

Closes #30 (closed)

compact/definitions.xml

@@ -442,10 +442,11 @@
     -->
 
     <comment> Global parameters </comment>
-    <constant name="ffi_ZDC_width"             value="60.0 * cm"/>
+    <constant name="ffi_ZDC_width"             value="40.0 * cm"/>
     <constant name="ffi_ZDC_thickness"         value="200.0 * cm"/>
-    <comment> original ffi_ZDC_thickness </comment>	    
+    <comment> Original Global parameters </comment>	    
     <!--
+    <constant name="ffi_ZDC_width"             value="60.0 * cm"/>
     <constant name="ffi_ZDC_thickness"         value="250.0 * cm"/>
     -->	    
     <constant name="ffi_ZDC_ECAL_thickness"    value="30.0 * cm"/>