Shift TS pad-3 to match LYSO in the default geometry (#1832)

Author: tvami

ComparePlots/__main__.py

@@ -26,7 +26,7 @@
 
 # guard incase someone imports this somehow
 if __name__ == '__main__' :
-    parser = argparse.ArgumentParser("python3 -m Validation",
+    parser = argparse.ArgumentParser("just compare-plots",
         description="""
         Make comparison plots between different files within a directory.
 

DQM/python/dqm.py

@@ -642,7 +642,7 @@ def __init__(self) :
 
         # weird binning so we can see the target and trigger pads
         self.build1DHistogram('dark_brem_z',
-            'Z Location of Dark Brem [mm]', 120, -5., 1.)
+            'Z Location of Dark Brem [mm]', 160, -7., 1.)
         # elements are hydrogen and carbon (for trigger pads) and tungsten target
         self.build1DHistogram('dark_brem_element',
             'Element in which Dark Brem Occurred',

Detectors/data/ldmx-det-v15-8gev/constants.gdml

@@ -49,15 +49,17 @@
 <constant name="trigger_pad_offset"    
           value="(target_dim_y - (number_of_bars*trigger_bar_dy + (number_of_bars - 1)*trigger_pad_bar_gap))/2" />
 
-<!-- Trigger pad distance from the target is -2.4262 --> 
+<!-- Trigger pad setup --> 
+<constant name="trigger_gap_from_target"
+          value="1.4248*mm" />
 <constant name="trig_scint_pad12_separation"
           value="60"/>
 <constant name="trigger_pad1_z"
           value="- trig_scint_pad12_separation - trigger_pad_thickness/2 - clearance" />
 <constant name="trigger_pad2_z"    
           value="-(trigger_pad_thickness/2) - clearance" />
 <constant name="trigger_pad3_z"      
-          value="target_z - (target_thickness/2) - (trigger_pad_thickness/2) - clearance" />
+          value="target_z - (target_thickness/2) - (trigger_pad_thickness/2) - trigger_gap_from_target - clearance" />
 
 <!-- Parent volume dimensions --> 
 <constant name="trig_scint_area_envelope_x" value="magnet_gap_dx - 5" />

Detectors/data/ldmx-det-v15-8gev/target.gdml

@@ -15,7 +15,8 @@
     <!-- Parent volume dimensions --> 
     <constant name="target_area_envelope_x" value="magnet_gap_dx - 5" />
     <constant name="target_area_envelope_y" value="magnet_gap_dy - 5" />
-    <constant name="target_area_envelope_z" value="2*(target_thickness/2 + 2*clearance + trigger_pad_thickness)" />
+    <constant name="target_area_envelope_z" 
+              value="2*(target_thickness/2 + 2*clearance + + trigger_gap_from_target + trigger_pad_thickness)" />
 
   </define>