1 ///////////////////////////////////////////////////////////////////////////////
3 // Inner Traking System //
4 // This class contains the base procedures for the Inner Tracking System //
8 <img src="picts/AliITSClass.gif">
11 <font size=+2 color=red>
12 <p>The responsible person for this module is
13 <a href="mailto:roberto.barbera@ct.infn.it">Roberto Barbera</a>.
19 ///////////////////////////////////////////////////////////////////////////////
24 #include <TGeometry.h>
27 #include "GParticle.h"
35 //_____________________________________________________________________________
36 AliITS::AliITS() : AliDetector()
39 // Default initialiser for ITS
45 //_____________________________________________________________________________
46 AliITS::AliITS(const char *name, const char *title)
47 : AliDetector(name,title)
50 // Default initialiser for ITS
53 fHits = new TClonesArray("AliITShit", 1560);
54 fDigits = new TClonesArray("AliITSdigit",1000);
59 fIdSens1 = fIdSens2 = fIdSens3 = fIdSens4 = fIdSens5 = fIdSens6 = 0;
64 //_____________________________________________________________________________
68 // Default distructor for ITS
74 //_____________________________________________________________________________
75 void AliITS::AddDigit(Int_t *tracks, Int_t *digits)
80 TClonesArray &ldigits = *fDigits;
81 new(ldigits[fNdigits++]) AliITSdigit(tracks,digits);
84 //_____________________________________________________________________________
85 void AliITS::AddHit(Int_t track, Int_t *vol, Float_t *hits)
90 TClonesArray &lhits = *fHits;
91 new(lhits[fNhits++]) AliITShit(fIshunt,track,vol,hits);
94 //_____________________________________________________________________________
95 void AliITS::BuildGeometry()
98 // Build ITS TNODE geometry for event display
101 const int kColorITS=kYellow;
103 Top=gAlice->GetGeometry()->GetNode("alice");
105 new TTUBE("S_layer1","Layer1 of ITS","void",3.9,3.9+0.05475,12.25);
107 Node = new TNode("Layer1","Layer1","S_layer1",0,0,0,"");
108 Node->SetLineColor(kColorITS);
111 new TTUBE("S_layer2","Layer2 of ITS","void",7.6,7.6+0.05475,16.3);
113 Node = new TNode("Layer2","Layer2","S_layer2",0,0,0,"");
114 Node->SetLineColor(kColorITS);
117 new TTUBE("S_layer3","Layer3 of ITS","void",14,14+0.05288,21.1);
119 Node = new TNode("Layer3","Layer3","S_layer3",0,0,0,"");
120 Node->SetLineColor(kColorITS);
123 new TTUBE("S_layer4","Layer4 of ITS","void",24,24+0.05288,29.6);
125 Node = new TNode("Layer4","Layer4","S_layer4",0,0,0,"");
126 Node->SetLineColor(kColorITS);
129 new TTUBE("S_layer5","Layer5 of ITS","void",40,40+0.05382,45.1);
131 Node = new TNode("Layer5","Layer5","S_layer5",0,0,0,"");
132 Node->SetLineColor(kColorITS);
135 new TTUBE("S_layer6","Layer6 of ITS","void",45,45+0.05382,50.4);
137 Node = new TNode("Layer6","Layer6","S_layer6",0,0,0,"");
138 Node->SetLineColor(kColorITS);
142 //_____________________________________________________________________________
143 void AliITS::CreateMaterials()
146 // Create ITS materials
149 Float_t awat[2] = { 1.00794,15.9994 };
150 Float_t zwat[2] = { 1.,8. };
151 Float_t wwat[2] = { 2.,1. };
152 Float_t denswat = 1.;
153 Float_t afre[2] = { 12.011,18.9984032 };
154 Float_t zfre[2] = { 6.,9. };
155 Float_t wfre[2] = { 5.,12. };
156 Float_t densfre = 1.5;
157 // 94.4% Al2O3 , 2.8% SiO2 , 2.3% MnO , 0.5% Cr2O3
158 Float_t acer[5] = { 26.981539,15.9994,28.0855,54.93805,51.9961 };
159 Float_t zcer[5] = { 13.,8.,14.,25., 24. };
160 Float_t wcer[5] = { .49976,1.01233,.01307, .01782,.00342 };
161 Float_t denscer = 3.6;
162 // 60% SiO2 , 40% G10FR4
163 Float_t apcb[3] = { 28.0855,15.9994,17.749 };
164 Float_t zpcb[3] = { 14.,8.,8.875 };
165 Float_t wpcb[3] = { .28,.32,.4 };
166 Float_t denspcb = 1.8;
167 Float_t apoly[2] = { 12.01,1. };
168 Float_t zpoly[2] = { 6.,1. };
169 Float_t wpoly[2] = { .33,.67 };
170 Float_t zserv[4] = { 1.,6.,26.,29. };
171 Float_t aserv[4] = { 1.,12.,55.8,63.5 };
172 Float_t wserv[4] = { .014,.086,.42,.48 };
174 Int_t ISXFLD = gAlice->Field()->Integ();
175 Float_t SXMGMX = gAlice->Field()->Max();
178 // --- Define the various materials for GEANT ---
180 // 200-224 --> Silicon Pixel Detectors (detectors, chips, buses, cooling,..)
182 AliMaterial(0, "SPD Si$", 28.0855, 14., 2.33, 9.36, 999);
183 AliMaterial(1, "SPD Si chip$", 28.0855, 14., 2.33, 9.36, 999);
184 AliMaterial(2, "SPD Si bus$", 28.0855, 14., 2.33, 9.36, 999);
185 AliMaterial(3, "SPD C$", 12.011, 6., 2.265,18.8, 999);
187 AliMaterial(4, "SPD Air$", 14.61, 7.3, .001205, 30423., 999);
188 AliMaterial(5, "SPD Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
189 AliMaterial(6, "SPD Al$", 26.981539, 13., 2.6989, 8.9, 999);
190 AliMixture( 7, "SPD Water $", awat, zwat, denswat, -2, wwat);
191 AliMixture( 8, "SPD Freon$", afre, zfre, densfre, -2, wfre);
193 AliMedium(200, "SPD Si$", 0, 1, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
194 AliMedium(201, "SPD Si chip$", 1, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
195 AliMedium(202, "SPD Si bus$", 2, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
196 AliMedium(203, "SPD C$", 3, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
197 AliMedium(204, "SPD Air$", 4, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
198 AliMedium(205, "SPD Vacuum$", 5, 0, ISXFLD, SXMGMX, 10., 1., .1, .1, 10.);
199 AliMedium(206, "SPD Al$", 6, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
200 AliMedium(207, "SPD Water $", 7, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
201 AliMedium(208, "SPD Freon$", 8, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
203 // 225-249 --> Silicon Drift Detectors (detectors, chips, buses, cooling,..)
205 AliMaterial(25, "SDD Si$", 28.0855, 14., 2.33, 9.36, 999);
206 AliMaterial(26, "SDD Si chip$", 28.0855, 14., 2.33, 9.36, 999);
207 AliMaterial(27, "SDD Si bus$", 28.0855, 14., 2.33, 9.36, 999);
208 AliMaterial(28, "SDD C$", 12.011, 6., 2.265,18.8, 999);
210 AliMaterial(29, "SDD Air$", 14.61, 7.3, .001205, 30423., 999);
211 AliMaterial(30, "SDD Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
212 AliMaterial(31, "SDD Al$", 26.981539, 13., 2.6989, 8.9, 999);
213 // After a call with ratios by number (negative number of elements),
214 // the ratio array is changed to the ratio by weight, so all successive
215 // calls with the same array must specify the number of elements as
217 AliMixture(32, "SDD Water $", awat, zwat, denswat, 2, wwat);
218 // After a call with ratios by number (negative number of elements),
219 // the ratio array is changed to the ratio by weight, so all successive
220 // calls with the same array must specify the number of elements as
222 AliMixture( 33, "SDD Freon$", afre, zfre, densfre, 2, wfre);
223 AliMixture( 34, "SDD PCB$", apcb, zpcb, denspcb, 3, wpcb);
224 AliMaterial(35, "SDD Copper$", 63.546, 29., 8.96, 1.43, 999);
225 AliMixture( 36, "SDD Ceramics$", acer, zcer, denscer, -5, wcer);
226 AliMaterial(37, "SDD Kapton$", 12.011, 6., 1.3, 31.27, 999);
229 AliMedium(225, "SDD Si$", 25, 1, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
230 AliMedium(226, "SDD Si chip$", 26, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
231 AliMedium(227, "SDD Si bus$", 27, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
232 AliMedium(228, "SDD C$", 28, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
233 AliMedium(229, "SDD Air$", 29, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
234 AliMedium(230, "SDD Vacuum$", 30, 0, ISXFLD, SXMGMX, 10., 1., .1, .1, 10.);
235 AliMedium(231, "SDD Al$", 31, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
236 AliMedium(232, "SDD Water $", 32, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
237 AliMedium(233, "SDD Freon$", 33, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
238 AliMedium(234, "SDD PCB$", 34, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
239 AliMedium(235, "SDD Copper$", 35, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
240 AliMedium(236, "SDD Ceramics$",36, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
241 AliMedium(237, "SDD Kapton$", 37, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
243 // 250-274 --> Silicon Strip Detectors (detectors, chips, buses, cooling,..)
245 AliMaterial(50, "SSD Si$", 28.0855, 14., 2.33, 9.36, 999.);
246 AliMaterial(51, "SSD Si chip$", 28.0855, 14., 2.33, 9.36, 999.);
247 AliMaterial(52, "SSD Si bus$", 28.0855, 14., 2.33, 9.36, 999.);
248 AliMaterial(53, "SSD C$", 12.011, 6., 2.265,18.8, 999.);
250 AliMaterial(54, "SSD Air$", 14.61, 7.3, .001205, 30423., 999);
251 AliMaterial(55, "SSD Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
252 AliMaterial(56, "SSD Al$", 26.981539, 13., 2.6989, 8.9, 999);
253 // After a call with ratios by number (negative number of elements),
254 // the ratio array is changed to the ratio by weight, so all successive
255 // calls with the same array must specify the number of elements as
257 AliMixture(57, "SSD Water $", awat, zwat, denswat, 2, wwat);
258 // After a call with ratios by number (negative number of elements),
259 // the ratio array is changed to the ratio by weight, so all successive
260 // calls with the same array must specify the number of elements as
262 AliMixture(58, "SSD Freon$", afre, zfre, densfre, 2, wfre);
263 AliMixture(59, "SSD PCB$", apcb, zpcb, denspcb, 3, wpcb);
264 AliMaterial(60, "SSD Copper$", 63.546, 29., 8.96, 1.43, 999.);
265 // After a call with ratios by number (negative number of elements),
266 // the ratio array is changed to the ratio by weight, so all successive
267 // calls with the same array must specify the number of elements as
269 AliMixture( 61, "SSD Ceramics$", acer, zcer, denscer, 5, wcer);
270 AliMaterial(62, "SSD Kapton$", 12.011, 6., 1.3, 31.27, 999.);
272 AliMaterial(63, "SDD G10FR4$", 17.749, 8.875, 1.8, 21.822, 999.);
274 AliMedium(250, "SSD Si$", 50, 1, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
275 AliMedium(251, "SSD Si chip$", 51, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
276 AliMedium(252, "SSD Si bus$", 52, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
277 AliMedium(253, "SSD C$", 53, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
278 AliMedium(254, "SSD Air$", 54, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
279 AliMedium(255, "SSD Vacuum$", 55, 0, ISXFLD, SXMGMX, 10., 1., .1, .1, 10.);
280 AliMedium(256, "SSD Al$", 56, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
281 AliMedium(257, "SSD Water $", 57, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
282 AliMedium(258, "SSD Freon$", 58, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
283 AliMedium(259, "SSD PCB$", 59, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
284 AliMedium(260, "SSD Copper$", 60, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
285 AliMedium(261, "SSD Ceramics$",61, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
286 AliMedium(262, "SSD Kapton$", 62, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
287 AliMedium(263, "SSD G10FR4$", 63, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
289 // 275-299 --> General (end-caps, frames, cooling, cables, etc.)
291 AliMaterial(75, "GEN C$", 12.011, 6., 2.265, 18.8, 999.);
293 AliMaterial(76, "GEN Air$", 14.61, 7.3, .001205, 30423., 999);
294 AliMaterial(77, "GEN Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
295 AliMixture( 78, "GEN POLYETHYL$", apoly, zpoly, .95, -2, wpoly);
296 AliMixture( 79, "GEN SERVICES$", aserv, zserv, 4.68, 4, wserv);
297 AliMaterial(80, "GEN Copper$", 63.546, 29., 8.96, 1.43, 999.);
298 // After a call with ratios by number (negative number of elements),
299 // the ratio array is changed to the ratio by weight, so all successive
300 // calls with the same array must specify the number of elements as
302 AliMixture(81, "GEN Water $", awat, zwat, denswat, 2, wwat);
304 AliMedium(275, "GEN C$", 75, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
305 AliMedium(276, "GEN Air$", 76, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
306 AliMedium(277, "GEN Vacuum$", 77, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, 10.);
307 AliMedium(278, "GEN POLYETHYL$", 78, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
308 AliMedium(279, "GEN SERVICES$", 79, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
309 AliMedium(280, "GEN Copper$", 80, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
310 AliMedium(281, "GEN Water $", 81, 0, ISXFLD, SXMGMX, 10., .01, .1, .003, .003);
313 //_____________________________________________________________________________
314 Int_t AliITS::DistancetoPrimitive(Int_t , Int_t )
317 // Distance from mouse to ITS on the screen. Dummy routine
322 //_____________________________________________________________________________
326 // Initialise ITS after it has been built
329 AliMC* pMC = AliMC::GetMC();
332 for(i=0;i<35;i++) printf("*");
333 printf(" ITS_INIT ");
334 for(i=0;i<35;i++) printf("*");
338 fIdSens1=pMC->VolId("ITS1");
339 fIdSens2=pMC->VolId("ITS2");
340 fIdSens3=pMC->VolId("ITS3");
341 fIdSens4=pMC->VolId("ITS4");
342 fIdSens5=pMC->VolId("ITS5");
343 fIdSens6=pMC->VolId("ITS6");
345 for(i=0;i<80;i++) printf("*");
349 //_____________________________________________________________________________
350 void AliITS::MakeBranch(Option_t* option)
353 // Create Tree branches for the ITS.
355 Int_t buffersize = 4000;
357 sprintf(branchname,"%s",GetName());
359 AliDetector::MakeBranch(option);
361 char *D = strstr(option,"D");
363 if (fDigits && gAlice->TreeD() && D) {
364 gAlice->TreeD()->Branch(branchname,&fDigits, buffersize);
365 printf("Making Branch %s for digits\n",branchname);
369 //_____________________________________________________________________________
370 void AliITS::SetEUCLID(Bool_t euclid)
373 // set euclid output flag
380 //_____________________________________________________________________________
381 AliITShit::AliITShit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
387 fLayer = vol[0]; // Layer number
388 fLadder = vol[2]; // Ladder number
389 fDet = vol[1]; // Detector number
399 ClassImp(AliITSdigit)
401 //_____________________________________________________________________________
402 AliITSdigit::AliITSdigit(Int_t *tracks, Int_t *digits):