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 **************************************************************************/
15 //////////////////////////////////////////////////////////////////////////////
17 // Forward Multiplicity Detector based on Silicon plates //
18 // This class contains the base procedures for the Forward Multiplicity //
20 // Detector consists of 6 Si volumes covered pseudorapidity interval //
21 // from 1.6 to 6.0. //
25 <img src="gif/AliFMDClass.gif">
28 <font size=+2 color=red>
29 <p>The responsible person for this module is
30 <a href="mailto:Alla.Maevskaia@cern.ch">Alla Maevskaia</a>.
37 ///////////////////////////////////////////////////////////////////////////////
41 #include <TGeometry.h>
46 #include <TClonesArray.h>
47 #include <TLorentzVector.h>
54 #include "AliFMDhit.h"
55 #include "AliFMDdigit.h"
61 //_____________________________________________________________________________
62 AliFMD::AliFMD(): AliDetector()
65 // Default constructor for class AliFMD
70 //_____________________________________________________________________________
71 AliFMD::AliFMD(const char *name, const char *title)
72 : AliDetector(name,title)
75 // Standard constructor for Forward Multiplicity Detector
79 // Initialise Hit array
80 fHits = new TClonesArray("AliFMDhit", 1000);
81 // Digits for each Si disk
82 fDigits = new TClonesArray("AliFMDdigit", 1000);
83 fSDigits = new TClonesArray("AliFMDdigit", 1000) ;
84 gAlice->AddHitList(fHits);
103 //_____________________________________________________________________________
104 void AliFMD::AddHit(Int_t track, Int_t *vol, Float_t *hits)
107 // Add a hit to the list
109 TClonesArray &lhits = *fHits;
110 new(lhits[fNhits++]) AliFMDhit(fIshunt,track,vol,hits);
112 //_____________________________________________________________________________
113 void AliFMD::AddDigit( Int_t *digits)
115 // add a real digit - as coming from data
117 // printf("AddDigit\n");
119 TClonesArray &ldigits = *fDigits;
120 // new((*fDigits)[fNdigits++]) AliFMDdigit(digits);
121 new(ldigits[fNdigits++]) AliFMDdigit(digits);
124 //_____________________________________________________________________________
125 void AliFMD::BuildGeometry()
128 // Build simple ROOT TNode geometry for event display
131 const int kColorFMD = 7;
133 top=gAlice->GetGeometry()->GetNode("alice");
135 // FMD define the different volumes
136 new TRotMatrix("rot901","rot901", 90, 0, 90, 90, 180, 0);
138 new TTUBE("S_FMD0","FMD volume 0","void",4.73,17.7,1.5);
140 node = new TNode("FMD0","FMD0","S_FMD0",0,0,64,"");
141 node->SetLineColor(kColorFMD);
144 new TTUBE("S_FMD1","FMD volume 1","void",23.4,36.,1.5);
146 node = new TNode("FMD1","FMD1","S_FMD1",0,0,85,"");
147 node->SetLineColor(kColorFMD);
150 new TTUBE("S_FMD2","FMD volume 2","void",4.73,17.7,1.5);
152 node = new TNode("FMD2","FMD2","S_FMD2",0,0,-64,"");
153 node->SetLineColor(kColorFMD);
156 new TTUBE("S_FMD3","FMD volume 3","void",23.4,36.,1.5);
158 node = new TNode("FMD3","FMD3","S_FMD3",0,0,-85,"");
159 node->SetLineColor(kColorFMD);
162 new TTUBE("S_FMD4","FMD volume 4","void",5,15,0.015);
164 node = new TNode("FMD4","FMD4","S_FMD4",0,0,-270,"");
165 node->SetLineColor(kColorFMD);
169 new TTUBE("S_FMD5","FMD volume 5","void",5,14,0.015);
171 node = new TNode("FMD5","FMD5","S_FMD5",0,0,-630,"");
172 node->SetLineColor(kColorFMD);
177 //_____________________________________________________________________________
178 Int_t AliFMD::DistanceToPrimitive(Int_t px, Int_t py)
181 // Calculate the distance from the mouse to the FMD on the screen
186 //___________________________________________
187 void AliFMD::ResetHits()
189 // Reset number of clusters and the cluster array for this detector
190 AliDetector::ResetHits();
193 //____________________________________________
194 void AliFMD::ResetDigits()
197 // Reset number of digits and the digits array for this detector
198 AliDetector::ResetHits();
202 //-------------------------------------------------------------------------
206 // Initialis the FMD after it has been built
208 AliMC* pMC = AliMC::GetMC();
211 for(i=0;i<35;i++) printf("*");
212 printf(" FMD_INIT ");
213 for(i=0;i<35;i++) printf("*");
216 // Here the FMD initialisation code (if any!)
217 for(i=0;i<80;i++) printf("*");
221 fIdSens1=pMC->VolId("GRIN"); //Si sensetive volume
224 //---------------------------------------------------------------------
225 void AliFMD::MakeBranch(Option_t* option, char *file)
227 // Create Tree branches for the FMD.
228 const Int_t kBufferSize = 4000;
230 sprintf(branchname,"%s",GetName());
232 AliDetector::MakeBranch(option,file);
234 const char *cD = strstr(option,"D");
238 gAlice->MakeBranchInTree(gAlice->TreeD(),
239 branchname, &fDigits, kBufferSize, file) ;
241 printf("Making Branch %s for digits\n",branchname);
242 gAlice->TreeD()->Print();
246 //_____________________________________________________________________________
247 void AliFMD::SetTreeAddress()
249 // Set branch address for the Hits and Digits Tree.
251 AliDetector::SetTreeAddress();
254 TTree *treeD = gAlice->TreeD();
259 branch = treeD->GetBranch(branchname);
260 if (branch) branch->SetAddress(&fDigits);
267 if (gAlice->TreeS() && fSDigits ) {
268 branch = gAlice->TreeS()->GetBranch("FMD");
269 if (branch) branch->SetAddress(&fSDigits) ;
275 //---------------------------------------------------------------------
277 void AliFMD::SDigits2Digits()
283 printf("nbgr_ev %d\n",nbgr_ev);
284 // Hit2Digits(nbgr_ev,"Add"," ","galice_bgr.root");
287 // Hit2Digits(nbgr_ev,"rien","","");
292 //---------------------------------------------------------------------
296 void AliFMD::Eta2Radius(Float_t eta, Float_t zDisk, Float_t *radius)
298 Float_t expEta=TMath::Exp(-eta);
299 Float_t theta=TMath::ATan(expEta);
301 Float_t rad=zDisk*(TMath::Tan(theta));
304 printf(" eta %f radius %f\n", eta, rad);
307 //---------------------------------------------------------------------
309 void AliFMD::Hits2SDigits(){
311 cout<<"ALiFMD::Hits2SDigits> start...\n";
313 char * fileSDigits = 0 ;
314 char * fileHeader=0 ;
315 AliFMDSDigitizer * sd = new AliFMDSDigitizer("mgalice.root","FMD.SDigit.root") ;