diff --git a/Detector/DetDriftChamber/compact/materials.xml b/Detector/DetDriftChamber/compact/materials.xml
index a86e3c48cccd159c8fa873bf65f60c66bc6378de..44ee58bf7f60632ec8addf1cee047ed2f259cb5b 100644
--- a/Detector/DetDriftChamber/compact/materials.xml
+++ b/Detector/DetDriftChamber/compact/materials.xml
@@ -148,5 +148,12 @@
<fraction n="0.671054" ref="Bi" />
</material>
+ <!-- Driftchamber: material for the drift chamber -->
+ <material name="GasHe_90Isob_10">
+ <D value="0.0003983999999999999" unit="g/cm3" />
+ <fraction n="0.3826351004462046" ref="He"/>
+ <fraction n="0.011371937371285891" ref="H" />
+ <fraction n="0.6059929621825095" ref="C" />
+ </material>
</materials>
diff --git a/Detector/DetDriftChamber/src/driftchamber/DriftChamber.cpp b/Detector/DetDriftChamber/src/driftchamber/DriftChamber.cpp
index 27d2a4f936fd450dddd1c38d0754b9344a3609f3..8a978ef41b86175dc1d95f4097e258be5f3bf9c5 100644
--- a/Detector/DetDriftChamber/src/driftchamber/DriftChamber.cpp
+++ b/Detector/DetDriftChamber/src/driftchamber/DriftChamber.cpp
@@ -107,9 +107,6 @@ static dd4hep::Ref_t create_detector(dd4hep::Detector& theDetector,
double wall_rmin[4] = {inner_chamber_inner_wall_rmin,inner_chamber_outer_wall_rmin,outer_chamber_inner_wall_rmin,outer_chamber_outer_wall_rmin};
double wall_rmax[4] = {inner_chamber_inner_wall_rmax,inner_chamber_outer_wall_rmax,outer_chamber_inner_wall_rmax,outer_chamber_outer_wall_rmax};
- dd4hep::Tube wall_solid;
- dd4hep::Volume wall_vol;
-
// - wire
dd4hep::Volume module_vol;
dd4hep::Volume Module_vol;
@@ -158,6 +155,7 @@ static dd4hep::Ref_t create_detector(dd4hep::Detector& theDetector,
double rmin,rmax,offset;
std::string layer_name;
dd4hep::Volume* current_vol_ptr = nullptr;
+ dd4hep::Material layer_mat(theDetector.material("GasHe_90Isob_10"));
if( layer_id < inner_chamber_layer_number ) {
current_vol_ptr = &det_inner_chamber_vol;
rmin = inner_chamber_radius_min+(layer_id*chamber_layer_width);
@@ -186,18 +184,18 @@ static dd4hep::Ref_t create_detector(dd4hep::Detector& theDetector,
DCHseg->setWiresInLayer(layer_id, numWire);
dd4hep::Tube layer_solid(rmin,rmax,chamber_length*0.5);
- dd4hep::Volume layer_vol(layer_name,layer_solid,det_mat);
+ dd4hep::Volume layer_vol(layer_name,layer_solid,layer_mat);
layer_vol.setAttributes(theDetector,x_det.regionStr(),x_det.limitsStr(),x_det.visStr());
// - wire vol
//phi <-------------------> -phi
- // | F4 F3|
- // | |
- // | S F2|
- // | |
- // | F0 F1|
- // ---------------------
-// if(layer_id == 1) {
+ // | F8 F7 F6 F5| Only on the outermost layer.
+ // | |
+ // | S F4|
+ // | |
+ // | F0 F1 F2 F3|
+ // -----------------------
+// if(layer_id == 1|| layer_id == 2 || layer_id ==3) {
for(int icell=0; icell< numWire; icell++) {
double wire_phi = (icell+0.5)*layer_Phi + offset;
// - signal wire
@@ -205,9 +203,11 @@ static dd4hep::Ref_t create_detector(dd4hep::Detector& theDetector,
dd4hep::PlacedVolume module_phy = layer_vol.placeVolume(module_vol,transform_module);
// - Field wire
dd4hep::PlacedVolume Module_phy;
- double radius[5] = {rmid-chamber_layer_width*0.5,rmid-chamber_layer_width*0.5,rmid,rmid+chamber_layer_width*0.5,rmid+chamber_layer_width*0.5};
- double phi[5] = {wire_phi,wire_phi-layer_Phi*0.5,wire_phi-layer_Phi*0.5,wire_phi-layer_Phi*0.5,wire_phi};
- for(int i=0; i<5; i++) {
+ double radius[9] = {rmid-chamber_layer_width*0.5,rmid-chamber_layer_width*0.5,rmid-chamber_layer_width*0.5,rmid-chamber_layer_width*0.5,rmid,rmid+chamber_layer_width*0.5,rmid+chamber_layer_width*0.5,rmid+chamber_layer_width*0.5,rmid+chamber_layer_width*0.5};
+ double phi[9] = {wire_phi+layer_Phi*0.25,wire_phi,wire_phi-layer_Phi*0.25,wire_phi-layer_Phi*0.5,wire_phi-layer_Phi*0.5,wire_phi-layer_Phi*0.5,wire_phi-layer_Phi*0.25,wire_phi,wire_phi+layer_Phi*0.25};
+ int num = 5;
+ if(layer_id==66||layer_id==129) { num = 9; }
+ for(int i=0; i<num ; i++) {
dd4hep::Position tr3D = Position(radius[i]*std::cos(phi[i]),radius[i]*std::sin(phi[i]),0.);
dd4hep::Transform3D transform_Module(dd4hep::Rotation3D(),tr3D);
Module_phy = layer_vol.placeVolume(Module_vol,transform_Module);
@@ -248,12 +248,12 @@ static dd4hep::Ref_t create_detector(dd4hep::Detector& theDetector,
dd4hep::Position(0,0,0));
dd4hep::PlacedVolume phv = envelope.placeVolume(det_vol,transform);
// - place wall
- dd4hep::PlacedVolume wall_phy;
- for(int i=0; i<4 ; i++) {
- wall_solid = Tube(wall_rmin[i],wall_rmax[i],chamber_length*0.5);
- wall_vol = Volume(det_name+"_wall_vol",wall_solid,wall_mat);
+// dd4hep::PlacedVolume wall_phy;
+ for(int i=0; i<4; i++) {
+ dd4hep::Tube wall_solid(wall_rmin[i],wall_rmax[i],chamber_length*0.5);
+ dd4hep::Volume wall_vol(det_name+"_wall_vol",wall_solid,wall_mat);
wall_vol.setVisAttributes(theDetector,"VisibleGreen");
- wall_phy = envelope.placeVolume(wall_vol,transform);
+ dd4hep::PlacedVolume wall_phy = envelope.placeVolume(wall_vol,transform);
}
if ( x_det.hasAttr(_U(id)) ) {