source: trunk/examples/extended/optical/LXe/src/LXeMainVolume.cc@ 1036

Last change on this file since 1036 was 807, checked in by garnier, 17 years ago

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24// ********************************************************************
25//
26#include "LXeMainVolume.hh"
27#include "globals.hh"
28#include "G4SDManager.hh"
29#include "G4LogicalSkinSurface.hh"
30#include "G4LogicalBorderSurface.hh"
31#include "LXePMTSD.hh"
32#include "LXeScintSD.hh"
33
34LXeScintSD* LXeMainVolume::scint_SD;
35LXePMTSD* LXeMainVolume::pmt_SD;
36
37G4LogicalVolume* LXeMainVolume::housing_log=NULL;
38
39LXeMainVolume::LXeMainVolume(G4RotationMatrix *pRot,
40 const G4ThreeVector &tlate,
41 G4LogicalVolume *pMotherLogical,
42 G4bool pMany,
43 G4int pCopyNo,
44 LXeDetectorConstruction* c)
45 //Pass info to the G4PVPlacement constructor
46 :G4PVPlacement(pRot,tlate,
47 //Temp logical volume must be created here
48 new G4LogicalVolume(new G4Box("temp",1,1,1),
49 G4Material::GetMaterial("Vacuum"),
50 "temp",0,0,0),
51 "housing",pMotherLogical,pMany,pCopyNo),constructor(c)
52{
53 CopyValues();
54
55 if(!housing_log || updated){
56
57 G4double housing_x=scint_x+d_mtl;
58 G4double housing_y=scint_y+d_mtl;
59 G4double housing_z=scint_z+d_mtl;
60
61 //*************************** housing and scintillator
62 scint_box = new G4Box("scint_box",scint_x/2.,scint_y/2.,scint_z/2.);
63 housing_box = new G4Box("housing_box",housing_x/2.,housing_y/2.,
64 housing_z/2.);
65
66 scint_log = new G4LogicalVolume(scint_box,G4Material::GetMaterial("LXe"),
67 "scint_log",0,0,0);
68 housing_log = new G4LogicalVolume(housing_box,
69 G4Material::GetMaterial("Al"),
70 "housing_log",0,0,0);
71
72
73 scint_phys = new G4PVPlacement(0,G4ThreeVector(),scint_log,"scintillator",
74 housing_log,false,0);
75
76 //*************** Miscellaneous sphere to demonstrate skin surfaces
77 sphere = new G4Sphere("sphere",0.*mm,2.*cm,0.*deg,360.*deg,0.*deg,
78 360.*deg);
79 sphere_log = new G4LogicalVolume(sphere,G4Material::GetMaterial("Al"),
80 "sphere_log");
81 if(sphereOn)
82 sphere_phys = new G4PVPlacement(0,G4ThreeVector(5.*cm,5.*cm,5.*cm),
83 sphere_log,"sphere",scint_log,false,0);
84
85
86 //****************** Build PMTs
87 G4double innerRadius_pmt = 0.*cm;
88 G4double height_pmt = d_mtl/2.;
89 G4double startAngle_pmt = 0.*deg;
90 G4double spanningAngle_pmt = 360.*deg;
91
92 pmt = new G4Tubs("pmt_tube",innerRadius_pmt,outerRadius_pmt,
93 height_pmt,startAngle_pmt,spanningAngle_pmt);
94
95 //the "photocathode" is a metal slab at the back of the glass that
96 //is only a very rough approximation of the real thing since it only
97 //absorbs or detects the photons based on the efficiency set below
98 photocath = new G4Tubs("photocath_tube",innerRadius_pmt,outerRadius_pmt,
99 height_pmt/2,startAngle_pmt,spanningAngle_pmt);
100
101 pmt_log = new G4LogicalVolume(pmt,G4Material::GetMaterial("Glass"),
102 "pmt_log");
103 photocath_log = new G4LogicalVolume(photocath,
104 G4Material::GetMaterial("Al"),
105 "photocath_log");
106
107 photocath_phys = new G4PVPlacement(0,G4ThreeVector(0,0,-height_pmt/2),
108 photocath_log,"photocath",
109 pmt_log,false,0);
110
111
112
113 //***********Arrange pmts around the outside of housing**********
114 //---pmt sensitive detector
115 G4SDManager* SDman = G4SDManager::GetSDMpointer();
116
117 if(!pmt_SD){
118 pmt_SD = new LXePMTSD("/LXeDet/pmtSD");
119 SDman->AddNewDetector(pmt_SD);
120 //Created here so it exists as pmts are being placed
121 }
122 pmt_SD->InitPMTs((nx*ny+nx*nz+ny*nz)*2); //let pmtSD know # of pmts
123 //-------
124
125 G4double dx = scint_x/nx;
126 G4double dy = scint_y/ny;
127 G4double dz = scint_z/nz;
128
129 G4double x,y,z;
130 G4double xmin = -scint_x/2. - dx/2.;
131 G4double ymin = -scint_y/2. - dy/2.;
132 G4double zmin = -scint_z/2. - dz/2.;
133 G4int k=0;
134
135 z = -scint_z/2. - height_pmt; //front
136 PlacePMTs(pmt_log,0,x,y,dx,dy,xmin,ymin,nx,ny,x,y,z,k,pmt_SD);
137 G4RotationMatrix* rm_z = new G4RotationMatrix();
138 rm_z->rotateY(180*deg);
139 z = scint_z/2. + height_pmt; //back
140 PlacePMTs(pmt_log,rm_z,x,y,dx,dy,xmin,ymin,nx,ny,x,y,z,k,pmt_SD);
141
142 G4RotationMatrix* rm_y1 = new G4RotationMatrix();
143 rm_y1->rotateY(-90*deg);
144 x = -scint_x/2. - height_pmt; //left
145 PlacePMTs(pmt_log,rm_y1,y,z,dy,dz,ymin,zmin,ny,nz,x,y,z,k,pmt_SD);
146 G4RotationMatrix* rm_y2 = new G4RotationMatrix();
147 rm_y2->rotateY(90*deg);
148 x = scint_x/2. + height_pmt; //right
149 PlacePMTs(pmt_log,rm_y2,y,z,dy,dz,ymin,zmin,ny,nz,x,y,z,k,pmt_SD);
150
151 G4RotationMatrix* rm_x1 = new G4RotationMatrix();
152 rm_x1->rotateX(90*deg);
153 y = -scint_y/2. - height_pmt; //bottom
154 PlacePMTs(pmt_log,rm_x1,x,z,dx,dz,xmin,zmin,nx,nz,x,y,z,k,pmt_SD);
155 G4RotationMatrix* rm_x2 = new G4RotationMatrix();
156 rm_x2->rotateX(-90*deg);
157 y = scint_y/2. + height_pmt; //top
158 PlacePMTs(pmt_log,rm_x2,x,z,dx,dz,xmin,zmin,nx,nz,x,y,z,k,pmt_SD);
159
160 //**********Setup Sensitive Detectors***************
161 if(!scint_SD){//determine if it has already been created
162 scint_SD = new LXeScintSD("/LXeDet/scintSD");
163 SDman->AddNewDetector(scint_SD);
164 }
165 scint_log->SetSensitiveDetector(scint_SD);
166
167 //sensitive detector is not actually on the photocathode.
168 //processHits gets done manually by the stepping action.
169 //It is used to detect when photons hit and get absorbed&detected at the
170 //boundary to the photocathode (which doesnt get done by attaching it to a
171 //logical volume.
172 //It does however need to be attached to something or else it doesnt get
173 //reset at the begining of events
174 photocath_log->SetSensitiveDetector(pmt_SD);
175
176 VisAttributes();
177 SurfaceProperties();
178 }
179
180 SetLogicalVolume(housing_log);
181}
182
183void LXeMainVolume::CopyValues(){
184 updated=constructor->GetUpdated();
185
186 scint_x=constructor->GetScintX();
187 scint_y=constructor->GetScintY();
188 scint_z=constructor->GetScintZ();
189 d_mtl=constructor->GetHousingThickness();
190 nx=constructor->GetNX();
191 ny=constructor->GetNY();
192 nz=constructor->GetNZ();
193 outerRadius_pmt=constructor->GetPMTRadius();
194 sphereOn=constructor->GetSphereOn();
195 refl=constructor->GetHousingReflectivity();
196}
197
198//_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
199void LXeMainVolume::PlacePMTs(G4LogicalVolume* pmt_log,
200 G4RotationMatrix *rot,
201 G4double &a, G4double &b, G4double da,
202 G4double db, G4double amin,
203 G4double bmin, G4int na, G4int nb,
204 G4double &x, G4double &y, G4double &z,
205 G4int &k,LXePMTSD* sd){
206/*PlacePMTs : a different way to parameterize placement that does not depend on
207 calculating the position from the copy number
208
209 pmt_log = logical volume for pmts to be placed
210 rot = rotation matrix to apply
211 a,b = coordinates to vary(ie. if varying in the xy plane then pass x,y)
212 da,db = value to increment a,b by
213 amin,bmin = start values for a,b
214 na,nb = number of repitions in a and b
215 x,y,z = just pass x,y, and z by reference (the same ones passed for a,b)
216 k = copy number to start with
217 sd = sensitive detector for pmts
218*/
219 a=amin;
220 for(G4int j=1;j<=na;j++){
221 a+=da;
222 b=bmin;
223 for(G4int i=1;i<=nb;i++){
224 b+=db;
225 new G4PVPlacement(rot,G4ThreeVector(x,y,z),pmt_log,"pmt",
226 housing_log,false,k);
227 sd->SetPMTPos(k,x,y,z);
228 k++;
229 }
230 }
231}
232
233void LXeMainVolume::VisAttributes(){
234 G4VisAttributes* housing_va = new G4VisAttributes(G4Colour(0.8,0.8,0.8));
235 housing_log->SetVisAttributes(housing_va);
236
237 G4VisAttributes* sphere_va = new G4VisAttributes();
238 sphere_va->SetForceSolid(true);
239 sphere_log->SetVisAttributes(sphere_va);
240}
241
242void LXeMainVolume::SurfaceProperties(){
243 const G4int num = 2;
244 G4double Ephoton[num] = {7.0*eV, 7.14*eV};
245
246 //**Scintillator housing properties
247 G4double Reflectivity[num] = {refl, refl};
248 G4double Efficiency[num] = {0.0, 0.0};
249 G4MaterialPropertiesTable* scintHsngPT = new G4MaterialPropertiesTable();
250 scintHsngPT->AddProperty("REFLECTIVITY", Ephoton, Reflectivity, num);
251 scintHsngPT->AddProperty("EFFICIENCY", Ephoton, Efficiency, num);
252 G4OpticalSurface* OpScintHousingSurface =
253 new G4OpticalSurface("HousingSurface",unified,polished,dielectric_metal);
254 OpScintHousingSurface->SetMaterialPropertiesTable(scintHsngPT);
255
256 //**Sphere surface properties
257 G4double SphereReflectivity[num] = {1.0, 1.0};
258 G4double SphereEfficiency[num] = {0.0, 0.0};
259 G4MaterialPropertiesTable* spherePT = new G4MaterialPropertiesTable();
260 spherePT->AddProperty("REFLECTIVITY", Ephoton, SphereReflectivity, num);
261 spherePT->AddProperty("EFFICIENCY", Ephoton, SphereEfficiency, num);
262 G4OpticalSurface* OpSphereSurface =
263 new G4OpticalSurface("SphereSurface",unified,polished,dielectric_metal);
264 OpSphereSurface->SetMaterialPropertiesTable(spherePT);
265
266 //**Photocathode surface properties
267 G4double photocath_EFF[num]={1.,1.}; //Enables 'detection' of photons
268 G4double photocath_REFL[num]={0.,0.};
269 G4MaterialPropertiesTable* photocath_mt = new G4MaterialPropertiesTable();
270 photocath_mt->AddProperty("EFFICIENCY",Ephoton,photocath_EFF,num);
271 photocath_mt->AddProperty("REFLECTIVITY",Ephoton,photocath_REFL,num);
272 G4OpticalSurface* photocath_opsurf=
273 new G4OpticalSurface("photocath_opsurf",glisur,polished,
274 dielectric_metal);
275 photocath_opsurf->SetMaterialPropertiesTable(photocath_mt);
276
277
278 //**Create logical skin surfaces
279 new G4LogicalSkinSurface("photocath_surf",housing_log,
280 OpScintHousingSurface);
281 new G4LogicalSkinSurface("sphere_surface",sphere_log,OpSphereSurface);
282 new G4LogicalSkinSurface("photocath_surf",photocath_log,photocath_opsurf);
283}
284
285
286
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