diff --git a/compact/cb_CTD_Si.xml b/compact/cb_CTD_Si.xml
index 3505aa3fad614d89d53223692b46031734b668f9..06b4f825556ef7b826860bef188cdf11521ec55d 100644
--- a/compact/cb_CTD_Si.xml
+++ b/compact/cb_CTD_Si.xml
@@ -15,8 +15,8 @@
   </display>
 
   <detectors>
-    <detector id="cb_CTD_Si_ID" name="cb_CTD_Si" type="cb_CTD_Si" readout="cb_CTD_Si_Hits" vis="cb_CTD_SiVis" insideTrackingVloume="true">
-      <dimensions rmin="cb_CTD_Si_rmin" rmax="cb_CTD_Si_rmax" length="cb_CTD_Si_length" zmax="cb_CTD_Si_zmax" gap="cb_CTD_Si_gap"/>
+    <detector id="cb_CTD_Si_ID" name="cb_CTD_Si" type="cb_CTD_Si" readout="cb_CTD_Si_Hits" vis="cb_CTDVis" insideTrackingVloume="true">
+      <dimensions rmin="cb_CTD_rmin" rmax="cb_CTD_rmax" length="cb_CTD_length" zmax="cb_CTD_zmax" gap="cb_CTD_Si_gap"/>
       <layer repeat="cb_CTD_Si_layer" vis="cb_CTD_Si_layerVis">
         <slice name="Silicon_slice" material="Si" sensitive="true"/>
       </layer>
diff --git a/compact/definitions.xml b/compact/definitions.xml
index df5f8113072b810cb1179d34cc9c462869f8609e..1f454dc65c626784ec861a8f1a4054df08c30999 100644
--- a/compact/definitions.xml
+++ b/compact/definitions.xml
@@ -321,22 +321,23 @@
     <constant name="SiliconTrackerOuterBarrelLength" value="SolenoidLength/2.0"/>
 
     <comment>
-      ----------------------------
-      Central Barrel Tracker - Si
-      ----------------------------
+      -------------------------------
+      Central Barrel Tracker - Global
+      -------------------------------
     </comment>
-    <constant name="cb_CTD_Si_rmin"   value="21.0 * cm"/>
-    <constant name="cb_CTD_Si_rmax"   value="80.0 * cm"/>
-    <constant name="cb_CTD_Si_zmax"   value="200.0 * cm"/>
+    <constant name="cb_CTD_rmin"   value="21.0 * cm"/>
+    <constant name="cb_CTD_rmax"   value="80.0 * cm"/>
+    <constant name="cb_CTD_zmax"   value="200.0 * cm"/>
     <comment> Original Global parameter </comment>	    
     <!--
-    <constant name="cb_CTD_Si_zmax"   value="120.0 * cm"/>
+    <constant name="cb_CTD_zmax"   value="120.0 * cm"/>
     -->	    
-    <constant name="cb_CTD_Si_length" value="SolenoidLength - cb_CTD_Si_zmax"/>
+    <constant name="cb_CTD_length" value="SolenoidLength - cb_CTD_zmax"/>
     <comment> After fix cb_Solenoid parameters  </comment>
     <!--	    
-    <constant name="cb_CTD_Si_length" value="cb_Solenoid_z - cb_CTD_Si_zmax"/>
+    <constant name="cb_CTD_length" value="cb_Solenoid_z - cb_CTD_zmax"/>
     -->
+    <comment> Si layer opiton </comment>
     <constant name="cb_CTD_Si_gap"    value="5.0 * cm"/>
     <constant name="cb_CTD_Si_layer"  value="15"/>
 
diff --git a/compact/display.xml b/compact/display.xml
index 2a7fa01def07962300863523683fb5ea8956be09..81130895a31b7a1ae52aa2daa5af2ce38d196641 100644
--- a/compact/display.xml
+++ b/compact/display.xml
@@ -51,7 +51,7 @@
     <vis name="cb_SolenoidVis"     alpha="0.4"  r= "0.1"  g="0.0"  b="0.1"  showDaughters="true" visible="true"/>
     <vis name="ffi_ZDCVis"         alpha="0.1"  r= "0.1"  g="0.0"  b="1.0"  showDaughters="true" visible="true"/>
     <vis name="ffi_ZDCmoduleVis"   alpha="1.0"  r= "0.1"  g="1.0"  b="0.9"  showDaughters="true" visible="true"/>
-    <vis name="cb_CTD_SiVis"       alpha="0.1"  r= "0.1"  g="0.0"  b="1.0"  showDaughters="true" visible="true"/>
+    <vis name="cb_CTDVis"          alpha="0.1"  r= "0.1"  g="0.0"  b="1.0"  showDaughters="true" visible="true"/>
     <vis name="cb_CTD_Si_layerVis" alpha="1.0"  r= "0.9"  g="1.0"  b="0.1"  showDaughters="true" visible="true"/>
 
     <comment>
diff --git a/src/cb_CTD_Si.cpp b/src/cb_CTD_Si.cpp
index d0f7025f9c3246f31a578252bfe8ceffe8947e50..4aed32b4ac10437149b7555c171b3f2253c9fa31 100644
--- a/src/cb_CTD_Si.cpp
+++ b/src/cb_CTD_Si.cpp
@@ -26,11 +26,41 @@ static Ref_t createDetector(Detector& desc, xml_h e, SensitiveDetector sens)
   Volume detVol("cb_CTD_GVol_Logic", cb_CTD_GVol_Solid, Vacuum);
   detVol.setVisAttributes(desc.visAttributes(x_det.visStr()));
 
+  // Construct Silicon Layers
+  xml_comp_t x_layer = x_det.child(_U(layer));
+  const int repeat   = x_layer.repeat();
+  
+  xml_comp_t x_slice = x_layer.child(_U(slice));
+  Material slice_mat = desc.material(x_slice.materialStr());
+  
+  double layerRIn[100];
+  double layerROut[100];
+  
+  // Loop over layers
+  for(int i = 0; i < repeat; i++) {
+    layerRIn[i]  = RIn + (SiLayerGap * i);
+    layerROut[i] = RIn + (0.01 + SiLayerGap * i);
+
+    if (layerROut[i] > ROut)
+      continue; 
+
+    string logic_layer_name = detName + _toString(i, "_Logic_lay_%d");
+    Volume layerVol(logic_layer_name,Tube(layerRIn[i], layerROut[i], SizeZ / 2.0, 0.0, 360.0 * deg), slice_mat);
+    layerVol.setVisAttributes(desc,x_layer.visStr());
+    sens.setType("tracker");
+    layerVol.setSensitiveDetector(sens);
+
+    Position     layer_pos = Position(0.0, 0.0, 0.0);
+    PlacedVolume layerPV = detVol.placeVolume(layerVol, layer_pos);
+    layerPV.addPhysVolID("layer", i+1);
+  }
+
   DetElement   det(detName, detID);
   Volume       motherVol = desc.pickMotherVolume(det);
   Transform3D  tr(RotationZYX(0.0, 0.0, 0.0), Position(0.0, 0.0, 0.0));
   PlacedVolume detPV = motherVol.placeVolume(detVol, tr);
   detPV.addPhysVolID("system", detID);
+  detPV.addPhysVolID("barrel", 1);
   det.setPlacement(detPV);
   return det;
 }