Update target EN config paramaters (#1840)

* Update target en biasing and threshold

* Comment updates

Author: JYoo001

Biasing/python/target.py

@@ -16,7 +16,7 @@
 def electro_nuclear( detector, generator ) :
     """Example configuration for producing electro-nuclear reactions in the target.
 
-    In this particular example, 4 GeV electrons are fired upstream of the
+    In this particular example, 8 GeV electrons are fired upstream of the
     tagger tracker. TargetENFilter filters out events that don't see an
     electro-nuclear reaction take places in the target.
 
@@ -45,19 +45,19 @@ def electro_nuclear( detector, generator ) :
     sim.setDetector( detector , True )
 
     # Set run parameters
-    sim.description = "Target electron-nuclear, xsec bias 1e8"
+    sim.description = "Target electron-nuclear, xsec bias 1e5"
     sim.beamSpotSmear = [20., 80., 0.] #mm
 
     sim.generators.append(generator)
 
     # Enable and configure the biasing
-    sim.biasing_operators = [ bias_operators.ElectroNuclear('target',1e8) ]
+    sim.biasing_operators = [ bias_operators.ElectroNuclear('target',1e5) ]
 
     # the following filters are in a library that needs to be included
     includeBiasing.library()
 
     # Configure the sequence in which user actions should be called.
-    recoil_thresh = 0.625 * generator.energy * 1000.
+    recoil_thresh = 0.975 * generator.energy * 1000.
     tagger_threshold = 0.95 * generator.energy * 1000.
     sim.actions.extend([
             filters.TaggerVetoFilter(thresh = tagger_threshold),