Line data Source code
1 : /**************************************************************************
2 : * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 : * *
4 : * Author: The ALICE Off-line Project. *
5 : * Contributors are mentioned in the code where appropriate. *
6 : * *
7 : * Permission to use, copy, modify and distribute this software and its *
8 : * documentation strictly for non-commercial purposes is hereby granted *
9 : * without fee, provided that the above copyright notice appears in all *
10 : * copies and that both the copyright notice and this permission notice *
11 : * appear in the supporting documentation. The authors make no claims *
12 : * about the suitability of this software for any purpose. It is *
13 : * provided "as is" without express or implied warranty. *
14 : **************************************************************************/
15 :
16 : // $Id$
17 :
18 : //-----------------------------------------------------------------------------
19 : /// \class AliMFTLadder
20 : ///
21 : /// Ladder Builder
22 : ///
23 : // author Raphael Tieulent <raphael.tieulent@cern.ch>
24 : //-----------------------------------------------------------------------------
25 :
26 : #include "TGeoMatrix.h"
27 : #include "TGeoManager.h"
28 : #include "TGeoBBox.h"
29 : #include "TGeoTube.h"
30 :
31 : #include "AliLog.h"
32 :
33 : #include "AliMFTLadderSegmentation.h"
34 : #include "AliMFTChipSegmentation.h"
35 : #include "AliMFTFlex.h"
36 : #include "AliMFTChip.h"
37 : #include "AliMFTLadder.h"
38 : #include "AliMFTConstants.h"
39 : #include "AliMFTGeometry.h"
40 : #include "TGeoCompositeShape.h"
41 : #include "TGeoBoolNode.h"
42 :
43 : /// \cond CLASSIMP
44 14 : ClassImp(AliMFTLadder);
45 : /// \endcond
46 :
47 : // Units are cm
48 14 : const Double_t AliMFTLadder::kLadderDeltaY = AliMFTGeometry::kSensorHeight + 2.*AliMFTGeometry::kSensorTopOffset;
49 14 : const Double_t AliMFTLadder::kLadderDeltaZ = AliMFTGeometry::kFlexThickness + AliMFTGeometry::kSensorThickness; // TODO: Adjust that value when adding glue layer
50 :
51 : //=============================================================================================
52 : /// \brief Default constructor
53 :
54 : AliMFTLadder::AliMFTLadder():
55 0 : TNamed(), fMFTFlex(NULL){
56 :
57 :
58 0 : }
59 : //=============================================================================================
60 : /// \brief Constructor
61 0 : AliMFTLadder::AliMFTLadder(AliMFTLadderSegmentation *segmentation):TNamed(segmentation->GetName(),segmentation->GetName()),fSegmentation(segmentation), fMFTFlex(NULL)
62 0 : {
63 0 : AliDebug(1, Form("Creating : %s", GetName()));
64 0 : fLadderVolume = new TGeoVolumeAssembly(GetName());
65 :
66 :
67 0 : }
68 :
69 :
70 : //=============================================================================================
71 :
72 0 : AliMFTLadder::~AliMFTLadder() {
73 0 : delete fMFTFlex;
74 :
75 0 : }
76 :
77 : //=============================================================================================
78 : /// \brief Build the ladder
79 : TGeoVolume * AliMFTLadder::CreateVolume() {
80 :
81 0 : Int_t nChips = fSegmentation->GetNSensors();
82 :
83 : // Create the flex
84 0 : fMFTFlex = new AliMFTFlex(fSegmentation);
85 0 : Double_t kFlexLength = nChips*(AliMFTGeometry::kSensorLength+AliMFTGeometry::kSensorInterspace)+AliMFTGeometry::kLadderOffsetToEnd + AliMFTGeometry::kSensorSideOffset;
86 0 : Double_t kShiftY = 2*AliMFTGeometry::kSensorTopOffset+AliMFTGeometry::kSensorHeight-AliMFTGeometry::kFlexHeight/2; // strange
87 0 : TGeoVolumeAssembly * flexVol = fMFTFlex->MakeFlex(fSegmentation->GetNSensors(), kFlexLength);
88 0 : fLadderVolume->AddNode(flexVol, 1, new TGeoTranslation(kFlexLength/2+AliMFTGeometry::kSensorSideOffset/2, kShiftY, AliMFTGeometry::kFlexThickness/2));
89 :
90 : // Create the CMOS Sensors
91 0 : CreateSensors();
92 :
93 0 : return fLadderVolume;
94 :
95 0 : }
96 :
97 :
98 :
99 : //=============================================================================================
100 : /// \brief Build the sensors
101 : void AliMFTLadder::CreateSensors() {
102 : // Create Shapes
103 :
104 : // The sensor part
105 0 : TGeoBBox *sensor = new TGeoBBox(AliMFTGeometry::kSensorLength/2., AliMFTGeometry::kSensorActiveHeight/2., AliMFTGeometry::kSensorThickness/2.);
106 :
107 : // The readout part
108 0 : TGeoBBox *readout = new TGeoBBox(AliMFTGeometry::kSensorLength/2.,(AliMFTGeometry::kSensorHeight-AliMFTGeometry::kSensorActiveHeight)/2., AliMFTGeometry::kSensorThickness/2.);
109 :
110 : // Get Mediums
111 0 : TGeoMedium *medSensorSi = gGeoManager->GetMedium("MFT_Si$");
112 0 : TGeoMedium *medReadoutSi = gGeoManager->GetMedium("MFT_Readout$");
113 0 : TGeoMedium *medAir = gGeoManager->GetMedium("MFT_Air$");
114 0 : TGeoMedium *kMedGlue = gGeoManager->GetMedium("MFT_Epoxy$"); // we assume epoxy glue, the silicone glue has to be defined
115 :
116 :
117 0 : AliMFTGeometry * mftGeom = AliMFTGeometry::Instance();
118 :
119 0 : TString namePrefix = Form("MFT_S_%d_%d_%d",
120 0 : mftGeom->GetHalfMFTID(fSegmentation->GetUniqueID()),
121 0 : mftGeom->GetHalfDiskID(fSegmentation->GetUniqueID()),
122 0 : mftGeom->GetLadderID(fSegmentation->GetUniqueID()) );
123 :
124 0 : TGeoVolume * chipVol = gGeoManager->MakeBox(namePrefix.Data(), medAir,AliMFTGeometry::kSensorLength/2.,AliMFTGeometry::kSensorHeight/2., AliMFTGeometry::kSensorThickness/2. );
125 0 : TGeoVolume * glue = gGeoManager->MakeBox(namePrefix.Data(), kMedGlue, (AliMFTGeometry::kSensorLength-AliMFTGeometry::kGlueEdge)/2.,
126 0 : (AliMFTGeometry::kSensorHeight-AliMFTGeometry::kGlueEdge)/2., AliMFTGeometry::kGlueThickness/2.);
127 0 : glue->SetVisibility(kTRUE);
128 0 : glue->SetLineColor(kRed-10);
129 0 : glue->SetLineWidth(1);
130 0 : glue->SetFillColor(glue->GetLineColor());
131 0 : glue->SetFillStyle(4000); // 0% transparent
132 :
133 : // Create Volumes
134 : // Chip Volume
135 0 : chipVol->SetVisibility(kTRUE);
136 :
137 : // The sensor Volume
138 0 : TGeoVolume *sensorVol = new TGeoVolume("MFTSensor", sensor, medSensorSi);
139 0 : sensorVol->SetVisibility(kTRUE);
140 0 : sensorVol->SetLineColor(kGreen+1);
141 0 : sensorVol->SetLineWidth(1);
142 0 : sensorVol->SetFillColor(sensorVol->GetLineColor());
143 0 : sensorVol->SetFillStyle(4000); // 0% transparent
144 0 : if(!mftGeom->GetSensorVolumeID()){
145 0 : mftGeom->SetSensorVolumeID(sensorVol->GetNumber());
146 0 : } else if (mftGeom->GetSensorVolumeID() != sensorVol->GetNumber()){
147 0 : AliFatal(Form("Different Sensor VOLUME ID in TGeo !!!!"));
148 : }
149 :
150 : // The Readout Volume
151 0 : TGeoVolume *readoutVol = new TGeoVolume("Readout", readout, medReadoutSi);
152 0 : readoutVol->SetVisibility(kTRUE);
153 0 : readoutVol->SetLineColor(kRed-6);
154 0 : readoutVol->SetLineWidth(1);
155 0 : readoutVol->SetFillColor(readoutVol->GetLineColor());
156 0 : readoutVol->SetFillStyle(4000); // 0% transparent
157 :
158 : // Building up the chip
159 0 : chipVol->AddNode(readoutVol, 1, new TGeoTranslation(0.,-AliMFTGeometry::kSensorHeight/2.+readout->GetDY(), 0.));
160 0 : chipVol->AddNode(sensorVol, 1, new TGeoTranslation( 0., AliMFTGeometry::kSensorHeight/2.-sensor->GetDY(),0.));
161 :
162 0 : for (int ichip =0; ichip<fSegmentation->GetNSensors(); ichip++) {
163 0 : AliMFTChipSegmentation * chipSeg = fSegmentation->GetSensor(ichip);
164 0 : TGeoCombiTrans * chipPos = chipSeg->GetTransformation();
165 0 : TGeoCombiTrans * chipPosGlue = chipSeg->GetTransformation();
166 : // Position of the center on the chip in the chip coordinate system
167 0 : Double_t pos[3] ={AliMFTGeometry::kSensorLength/2., AliMFTGeometry::kSensorHeight/2., AliMFTGeometry::kSensorThickness/2. - AliMFTGeometry::kGlueThickness};
168 0 : Double_t posglue[3] ={AliMFTGeometry::kSensorLength/2., AliMFTGeometry::kSensorHeight/2., AliMFTGeometry::kGlueThickness/2-AliMFTGeometry::kSensorThickness};
169 0 : Double_t master[3];
170 0 : Double_t masterglue[3];
171 0 : chipPos->LocalToMaster(pos, master);
172 0 : chipPosGlue->LocalToMaster(posglue, masterglue);
173 :
174 0 : TGeoBBox* shape = (TGeoBBox*)fLadderVolume->GetShape();
175 0 : master[0] -= shape->GetDX();
176 0 : master[1] -= shape->GetDY();
177 0 : master[2] -= shape->GetDZ();
178 :
179 0 : masterglue[0] -= shape->GetDX();
180 0 : masterglue[1] -= shape->GetDY();
181 0 : masterglue[2] -= shape->GetDZ();
182 :
183 0 : AliDebug(1,Form("Adding Chip %s_%d ",namePrefix.Data(),ichip));
184 0 : fLadderVolume->AddNode(chipVol, ichip, new TGeoTranslation(master[0],master[1],master[2]));
185 0 : fLadderVolume->AddNode(glue, ichip, new TGeoTranslation(masterglue[0],masterglue[1],masterglue[2]));
186 :
187 0 : }
188 :
189 0 : }
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