From 52ff9e41761c296fe0c5e8240970f16bb2aa402e Mon Sep 17 00:00:00 2001
From: Richard Jones <rjones30@gmail.com>
Date: Sat, 2 Feb 2019 14:10:46 -0500
Subject: [PATCH 1/3] - changes to the TOF lucite shielding block and mounting
 tube geometry   provided by Ashley Ernst - [rtj]

---
 ForwardTOF_HDDS.xml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/ForwardTOF_HDDS.xml b/ForwardTOF_HDDS.xml
index 3b09709d7..c8e51e7e4 100644
--- a/ForwardTOF_HDDS.xml
+++ b/ForwardTOF_HDDS.xml
@@ -49,7 +49,7 @@
       <plane value="1" />
     </posXYZ>
     <posXYZ volume="shield_front" X_Y_Z="0.0 0.0 -2.87" />
-    <posXYZ volume="shield_back" X_Y_Z="0.0 0.0 9.875" />
+    <posXYZ volume="shield_back" X_Y_Z="0.0 0.0 6.395" />
   </composition>
 
   <composition name="forwardTOF" envelope="FTOF">
@@ -130,13 +130,13 @@
 					    sensitive="true" />
   <box name="FTOX" X_Y_Z="252.0   3.0 2.54" material="Scintillator"
 					    sensitive="true" />
-  <box name="SHLH" X_Y_Z="25.4 25.4 5.715" material="Plexiglas" />
+  <box name="SHLH" X_Y_Z="25.0 25.0 5.715" material="Plexiglas" />
   <box name="SINS" X_Y_Z="12.0 12.0 5.715" material="Polyethylene" />
   <box name="SINA" X_Y_Z="9.53 9.53 5.715" material="Air" />
   <box name="SHFT" X_Y_Z="12.0 12.0 2.55" material="Polyethylene" />
   <box name="SINC" X_Y_Z="9.53 9.53 2.55" material="Air" />
-  <box name="SHLB" X_Y_Z="12.0 12.0 9.5" material="Polyethylene" />
-  <box name="SINB" X_Y_Z="9.53 9.53 9.5" material="Air" />
+  <box name="SHLB" X_Y_Z="12.0 12.0 2.54" material="Polyethylene" />
+  <box name="SINB" X_Y_Z="9.53 9.53 2.54" material="Air" />
 
   <!-- The following elements describe an early rendition of the GlueX
        detector simulated using a fast Monte Carlo program MCFast.  They

From 13bfdd38c0f466ef4e0889b5234b2ad6b39622c6 Mon Sep 17 00:00:00 2001
From: Richard Jones <rjones30@gmail.com>
Date: Sat, 2 Feb 2019 14:11:45 -0500
Subject: [PATCH 2/3] - fix comments [rtj]

---
 DIRC_HDDS.xml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/DIRC_HDDS.xml b/DIRC_HDDS.xml
index a28fc2c88..671d68b77 100644
--- a/DIRC_HDDS.xml
+++ b/DIRC_HDDS.xml
@@ -31,10 +31,10 @@
 
 <!-- DIRC detector
     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-     DRCC:
+    DRCC:
     DCML##: DIRC bar box module for bar box number ## 
-        OBCS:   DIRC optical box in the south side (lower one, below beamline)
-        OBCN:   DIRC optical box in the south side (upper one, above beamline)
+    OBCS:   DIRC optical box in the south side (lower one, below beamline)
+    OBCN:   DIRC optical box in the south side (upper one, above beamline)
     SPST:   Support structures for bar boxes
     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 -->

From 13ce2ba1473bb8776cf6719d0c788ca74cd95a39 Mon Sep 17 00:00:00 2001
From: Richard Jones <rjones30@gmail.com>
Date: Sat, 2 Feb 2019 14:12:00 -0500
Subject: [PATCH 3/3] - shift the DIRC upstream by 5.6cm to avoid overlaps of
 the mother   volume with the TOF lucite shield [rtj]

---
 main_HDDS.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main_HDDS.xml b/main_HDDS.xml
index d6fdba811..113202942 100644
--- a/main_HDDS.xml
+++ b/main_HDDS.xml
@@ -92,7 +92,7 @@
     <!--<posXYZ volume="CerenkovCntr" X_Y_Z="0.0 0.0 466.0" /> -->
     <!--posXYZ volume="GapEMcal" X_Y_Z="0.0 0.0 460.0" /-->
     <!-- To simulate DIRC hits uncomment the line below -->
-    <posXYZ volume="DIRC" X_Y_Z="0.0 0.0 595.600" />
+    <posXYZ volume="DIRC" X_Y_Z="0.0 0.0 590.000" />
     <posXYZ volume="ForwardTOF" X_Y_Z="0.308 0.225 605.793" rot="-0.0427 0.0461 -0.1813"/>
     <posXYZ volume="ForwardEMcal" X_Y_Z="0.529 -0.002 624.906" rot="-0.0418 -0.07019 -0.0149" />
     <!--posXYZ volume="ComptonEMcal" X_Y_Z="0.0 0.0 876.106" /-->