diff --git a/compact/cb_VTX.xml b/compact/cb_VTX.xml
index 45ffee548023dc5e524f7c7e8d93f2b9731a6b28..e3710b48a1bab94788682adfa332a6fbc2b8834f 100644
--- a/compact/cb_VTX.xml
+++ b/compact/cb_VTX.xml
@@ -18,13 +18,16 @@
<detector id="cb_VTX_ID" name="cb_VTX" type="cb_VTX" readout="cb_VTX_Hits" vis="cb_VTXVis" insideTrackingVloume="true">
<dimensions rmin="cb_VTX_rmin" rmax="cb_VTX_rmax" length="cb_VTX_length"/>
<position x="cb_VTX_x_pos" y="cb_VTX_y_pos" z="cb_VTX_z_pos"/>
+ <layer repeat="cb_VTX_layer" vis="cb_VTX_layerVis">
+ <slice name="Silicon_slice" material="Si" sensitive="true"/>
+ </layer>
</detector>
</detectors>
<readouts>
<readout name="cb_VTX_Hits">
<segmentation type="CartesianGridXY" grid_size_x="1.0*mm" grid_size_y="1.0*mm" />
- <id>system:8,barrel:3,layer:4,x:32:-16,y:-16</id>
+ <id>system:8,barrel:3,layer:4,module:8,x:32:-16,y:-16</id>
</readout>
</readouts>
diff --git a/compact/definitions.xml b/compact/definitions.xml
index 12df234af9dcda430656cec2c6c5371d0cbd756c..d5def7b5cc2c042981c194a369c5d2f07f518cad 100644
--- a/compact/definitions.xml
+++ b/compact/definitions.xml
@@ -346,6 +346,7 @@
<constant name="cb_VTX_y_pos" value="0.0*mm"/>
<constant name="cb_VTX_z_pos" value="0.0*mm"/>
+ <constant name="cb_VTX_layer" value="6"/>
<comment>
--------------------------
Silicon Tracker Parameters
diff --git a/compact/display.xml b/compact/display.xml
index 32523bbae5f79e1607f445be1fca9e64463cc7d8..91e32bd2ac903ee605cfa2b6afa05326b4c0cf71 100644
--- a/compact/display.xml
+++ b/compact/display.xml
@@ -56,6 +56,7 @@
<vis name="ce_GEMVis" alpha="0.1" r= "0.1" g="0.0" b="1.0" showDaughters="true" visible="true"/>
<vis name="cb_GEM_layerVis" alpha="0.8" r= "0.8" g="0.4" b="0.3" showDaughters="true" visible="true"/>
<vis name="cb_VTXVis" alpha="0.1" r= "0.1" g="0.0" b="1.0" showDaughters="true" visible="true"/>
+ <vis name="cb_VTX_layerVis" alpha="2.0" r= "0.0" g="0.2" b="0.8" showDaughters="true" visible="true"/>
<vis name="ci_GEMVis" r= "0.8" g="0.4" b="0.3" alpha="0.8" showDaughters="true" visible="true"/>
<vis name="ci_HCALVis" r= "0.6" g="0" b="0.6" alpha="1.0" showDaughters="true" visible="true"/>
diff --git a/src/cb_VTX.cpp b/src/cb_VTX.cpp
index 768ff7f9e0d2282490ba3bffe730bfb20afcc9dd..3d58b109e0983f485b1bab8b2f0d203ac1723d73 100644
--- a/src/cb_VTX.cpp
+++ b/src/cb_VTX.cpp
@@ -31,6 +31,73 @@ static Ref_t createDetector(Detector& desc, xml_h e, SensitiveDetector sens)
Volume detVol("cb_VTX_GVol_Logic", cb_VTX_GVol_Solid, Vacuum);
detVol.setVisAttributes(desc.visAttributes(x_det.visStr()));
+ // Barrel Ladder
+ 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 x = 0.0 * cm;
+ double y = 0.0 * cm;
+ double z = 0.0 * cm;
+ int FDIV = 0;
+ double dR = 0.0;
+ double length = 0.0;
+ double phi = 0.0;
+ // Ladder Layer Parameters
+ double lay_Dx[6];
+ double lay_Dy[6];
+ double lay_Dz[6];
+ double lay_Rin[6];
+ lay_Dx[0] = 0.050 * mm; lay_Dy[0] = 2.0 * cm; lay_Dz[0] = 10.0 * cm; lay_Rin[0] = 3.5 * cm;
+ lay_Dx[1] = 0.050 * mm; lay_Dy[1] = 2.0 * cm; lay_Dz[1] = 11.0 * cm; lay_Rin[1] = 4.5 * cm;
+ lay_Dx[2] = 0.150 * mm; lay_Dy[2] = 4.0 * cm; lay_Dz[2] = 18.0 * cm; lay_Rin[2] = 6.5 * cm;
+ lay_Dx[3] = 0.150 * mm; lay_Dy[3] = 4.0 * cm; lay_Dz[3] = 24.0 * cm; lay_Rin[3] = 10.5 * cm;
+ lay_Dx[4] = 0.150 * mm; lay_Dy[4] = 4.0 * cm; lay_Dz[4] = 36.0 * cm; lay_Rin[4] = 13.5 * cm;
+ lay_Dx[5] = 0.150 * mm; lay_Dy[5] = 4.0 * cm; lay_Dz[5] = 48.0 * cm; lay_Rin[5] = 15.5 * cm;
+
+ int i_module = 0.0;
+ // Loop over layers
+ for(int i = 0; i < repeat; i++) {
+ double cb_VTX_ladder_DZ = lay_Dz[i];
+ double cb_VTX_ladder_DY = lay_Dy[i];
+ double cb_VTX_ladder_Thickness = lay_Dx[i];
+ dR = lay_Rin[i];
+ length = 2.0 * 3.1415 * dR;
+ int laddersCount = length / cb_VTX_ladder_DY;
+
+ for (int i = 0; i < 2; i++) {
+ double LN = cb_VTX_ladder_DY * laddersCount;
+ double LN1 = cb_VTX_ladder_DY * (laddersCount + 1.0 + i);
+
+ if (LN/LN1 > 0.8)
+ laddersCount = laddersCount + 1;
+ }
+
+ double cb_VTX_ladder_deltaphi = 2.0 * 3.1415926 / laddersCount;
+
+ string ladderBoxName = detName + _toString(i, "_ladder_Solid_%d");
+ string ladderName = detName + _toString(i, "_ladder_Logic_%d");
+ Volume ladderVol(ladderName, Box(cb_VTX_ladder_Thickness * 0.5, cb_VTX_ladder_DY * 0.5, cb_VTX_ladder_DZ * 0.5), slice_mat);
+ ladderVol.setVisAttributes(desc,x_layer.visStr());
+ sens.setType("tracker");
+ ladderVol.setSensitiveDetector(sens);
+
+ for (int ia = 0; ia < laddersCount; ia++) {
+ phi = (ia * (cb_VTX_ladder_deltaphi));
+ x = - dR * cos(phi);
+ y = - dR * sin(phi);
+
+ RotationZYX ladder_rot = RotationZYX(cb_VTX_ladder_deltaphi * ia, 0.0, 0.0);
+ Position ladder_pos = Position(x, y, z);
+ string ladderName = detName + _toString(i, "_ladder_Phys_%d") + _toString(ia, "_%d");
+ PlacedVolume ladderPV = detVol.placeVolume(ladderVol, Transform3D(ladder_rot, ladder_pos));
+ i_module++;
+ ladderPV.addPhysVolID("layer", i+1).addPhysVolID("module", i_module);
+ }
+ }
+
DetElement det(detName, detID);
Volume motherVol = desc.pickMotherVolume(det);
Transform3D tr(RotationZYX(0.0, 0.0, 0.0), Position(0.0, 0.0, pos.z()));