1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // Cosmic Rays ALICE Trigger //
21 // This class contains the basic functions for the Cosmic Ray ALICE //
22 // detector. Functions specific to one particular geometry are //
23 // contained in the derived classes //
27 <img src="picts/AliCRTClass.gif">
29 <p>The responsible person for this module is
30 <a href="mailto:Enrique.Gamez.Flores@cern.ch">Enrique Gamez Flores</a>.
38 ///////////////////////////////////////////////////////////////////////////////
41 #include <TVirtualMC.h>
44 #include "AliCRTConstants.h"
45 #include "AliCRThit.h"
46 #include "AliLoader.h"
52 //_____________________________________________________________________________
56 // Default constructor for the CRT
64 //_____________________________________________________________________________
65 AliCRT::AliCRT(const char *name, const char *title)
66 : AliDetector(name,title)
69 // Standard constructor for the CRT module
72 fIshunt = 1; // All hits are associated with primary particles
74 fHits = new TClonesArray("AliCRThit",400) ;
76 gAlice->AddHitList(fHits);
84 //_____________________________________________________________________________
85 AliCRT::AliCRT(const AliCRT& crt)
93 //_____________________________________________________________________________
94 AliCRT& AliCRT::operator= (const AliCRT& crt)
97 // Asingment operator.
103 //_____________________________________________________________________________
107 // Standar destructor.
115 //_____________________________________________________________________________
116 void AliCRT::AddHit(Int_t track, Int_t *vol, Float_t *hits)
121 TClonesArray &lhits = *fHits;
122 new(lhits[fNhits++]) AliCRThit(fIshunt,track,vol,hits);
125 //_____________________________________________________________________________
126 void AliCRT::AddDigit(Int_t *tracks,Int_t *digits)
129 // Add a CRT digit to the list. Dummy function.
133 //_____________________________________________________________________________
134 void AliCRT::Init() const
143 printf("\n%s: ",ClassName());
144 for(i=0;i<35;i++) printf("*");
145 printf(" CRT_INIT ");
146 for(i=0;i<35;i++) printf("*");
147 printf("\n%s: ",ClassName());
149 // Here the CRT initialisation code (if any!)
150 for(i=0;i<80;i++) printf("*");
155 //_____________________________________________________________________________
156 void AliCRT::ResetHits()
158 // Reset number of clusters and the cluster array for this detector
159 AliDetector::ResetHits();
162 //_____________________________________________________________________________
163 void AliCRT::ResetDigits()
166 // Reset number of digits and the digits array for this detector
167 AliDetector::ResetDigits();
170 //____________________________________________________________________________
171 void AliCRT::FinishEvent()
176 //_____________________________________________________________________________
177 void AliCRT::BuildGeometry()
180 // Build simple ROOT TNode geometry for event display
184 //_____________________________________________________________________________
185 void AliCRT::CreateGeometry()
188 // Build simple ROOT TNode geometry for GEANT simulations
192 //_____________________________________________________________________________
193 void AliCRT::CreateMaterials()
195 // Magnatic field inside the pit
196 Int_t isxfld = gAlice->Field()->Integ();
197 Float_t sxmgmx = gAlice->Field()->Max();
199 //Magnetic field above the Magnet.
200 Int_t xfield = 0; // no Magnetic field.
202 Float_t xepsil = 0.1; // Tracking precission in cm. obove the pit
204 // --- Define the various materials for GEANT ---
205 Float_t epsil, stmin, tmaxfd, deemax, stemax;
208 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
209 AliMaterial(29, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
210 AliMaterial(49, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
213 AliMaterial(10, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
214 AliMaterial(30, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
215 AliMaterial(50, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
218 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
219 AliMaterial(35, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
220 AliMaterial(55, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
221 AliMaterial(75, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
222 AliMaterial(95, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
225 // Scintillator material polystyrene
226 Float_t aP[2] = {12.011, 1.00794};
227 Float_t zP[2] = {6.0, 1.0};
228 Float_t wP[2] = {1.0, 1.0};
230 AliMixture(13, "Polystyrene$", aP, zP, dP, -2, wP);
231 // Subalpine Molasse over the ALICE hall.
232 Float_t aMolasse[10] = { 1., 12.01, 15.994, 22.99, 24.305, 26.98, 28.086, 39.1, 40.08, 55.85 };
233 Float_t zMolasse[10] = {1., 6., 8., 11., 12., 13., 14., 19., 20., 26.};
234 Float_t wMolasse[10] = {0.008, 0.043, 0.485, 0.007, 0.042, 0.037, 0.215, 0.023, 0.1, 0.04};
235 Float_t dMolasse = 2.40;
236 AliMixture(24, "Molasse$", aMolasse, zMolasse, dMolasse, 10, wMolasse);
239 // Defines tracking media parameters.
240 // Les valeurs sont commentees pour laisser le defaut
241 // a GEANT (version 3-21, page CONS200), f.m.
242 epsil = .001; // Tracking precision, Inside the pit
243 stemax = -1.; // Maximum displacement for multiple scattering
244 tmaxfd = -20.; // Maximum angle due to field deflection
245 deemax = -.3; // Maximum fractional energy loss, DLS
249 Float_t atmaxfd = 10.;
250 Float_t adeemax = -0.1;
251 Float_t aepsil = 0.1;
252 Float_t astmin = -10.;
256 AliMedium(9, "ALU_C0 ", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
257 AliMedium(29, "ALU_C1 ", 29, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
258 AliMedium(49, "ALU_C2 ", 49, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
261 AliMedium(10, "FE_C0 ", 10, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
262 AliMedium(30, "FE_C1 ", 30, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
263 AliMedium(50, "FE_C2 ", 50, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
266 AliMedium(15, "AIR_C0 ", 15, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
267 AliMedium(35, "AIR_C1 ", 35, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
268 AliMedium(55, "AIR_C2 ", 55, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
269 AliMedium(75, "AIR_C4 ", 75, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
270 AliMedium(75, "AIR_C5 ", 95, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
274 // The scintillator of the CPV made of Polystyrene
275 // scintillator -> idtmed[1112]
276 AliMedium(13 , "CPV scint. ", 13, 1, isxfld, sxmgmx, 10., stemax, deemax, epsil, stmin);
278 // Molasse -> idtmed[1123]
279 AliMedium(24 , "Molasse ", 24, 0, xfield, xfieldm, tmaxfd, stemax, deemax, xepsil, stmin);
281 // Concrete, in case if we need to put hte shafts by ourselves.
283 Float_t aconc[10] = { 1.,12.01,15.994,22.99,24.305,26.98,28.086,39.1,40.08,55.85 };
284 Float_t zconc[10] = { 1.,6.,8.,11.,12.,13.,14.,19.,20.,26. };
285 Float_t wconc[10] = { .01,.001,.529107,.016,.002,.033872,.337021,.013,.044,.014 };
287 AliMixture(17, "CONCRETE$", aconc, zconc, 2.35, 10, wconc);
289 AliMedium(17, "CC_C0 ", 17, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
293 //_____________________________________________________________________________
294 void AliCRT::MakeBranch(Option_t* option, const char *file)
297 // Specific CRT branches
299 // Create Tree branches for the CRT.
300 Int_t buffersize = 400;
302 sprintf(branchname,"%s",GetName());
304 AliDetector::MakeBranch(option,file);
306 const char *cD = strstr(option,"D");
309 digits = new AliCRTdigit();
310 MakeBranchInTree(gAlice->TreeD(), branchname, "AliCRTdigit",
311 digits, buffersize, 1, file);
316 //_____________________________________________________________________________
317 void AliCRT::SetTreeAddress()
322 sprintf(branchname,"%s",GetName());
324 // Branch address for hit tree
325 TTree *treeH = fLoader->TreeH();
326 if (treeH && fHits) {
327 branch = treeH->GetBranch(branchname);
328 if (branch) branch->SetAddress(&fHits);