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 Revision 1.23 2001/09/19 18:41:45 alla
19 Asimmetric START geometry
21 Revision 1.22 2001/07/27 13:03:12 hristov
22 Default Branch split level set to 99
24 Revision 1.21 2001/06/27 16:06:59 hristov
25 Rotation matrix in BuildGeometry has been changed to rotx999
27 Revision 1.20.2.1 2001/06/27 10:51:15 alla
28 Rotation matrix in BuildGeometry has benn changed to rotx999
30 Revision 1.20 2001/05/16 14:57:21 alibrary
31 New files for folders and Stack
33 Revision 1.19 2001/04/04 12:10:18 alla
34 changes according Coding Convension
36 Revision 1.18 2001/03/12 17:46:43 hristov
37 Changes needed on Sun with CC 5.0
39 Revision 1.17 2001/01/26 19:59:53 hristov
40 Major upgrade of AliRoot code
42 Revision 1.16 2001/01/17 10:56:08 hristov
43 Corrections to destructors
45 Revision 1.15 2001/01/01 13:10:42 hristov
46 Local definition of digits removed
48 Revision 1.14 2000/12/22 16:17:15 hristov
49 Updated START code from Alla
51 Revision 1.13 2000/12/18 11:39:41 alibrary
52 Quick fix to avoid crash in display waiting for new version
54 Revision 1.12 2000/12/04 08:48:19 alibrary
55 Fixing problems in the HEAD
57 Revision 1.11 2000/10/13 13:14:08 hristov
58 Bug fixes and code cleaning
60 Revision 1.10 2000/10/02 21:28:13 fca
61 Removal of useless dependecies via forward declarations
63 Revision 1.9 2000/07/13 16:41:29 fca
64 New START corrected for coding conventions
66 Revision 1.8 2000/03/27 17:24:25 alla
69 Revision 1.6 2000/01/21 15:45:23 fca
72 Revision 1.5 2000/01/19 17:17:15 fca
73 Introducing a list of lists of hits -- more hits allowed for detector now
75 Revision 1.4 1999/11/12 15:04:00 fca
76 Modifications from A.Maevskaya
78 Revision 1.3 1999/09/29 09:24:29 fca
79 Introduction of the Copyright and cvs Log
83 ///////////////////////////////////////////////////////////////////////////////
85 // START (T-Zero) Detector //
86 // This class contains the base procedures for the START //
91 <img src="gif/AliSTARTClass.gif">
94 <font size=+2 color=red>
95 <p>The responsible person for this module is
96 <a href="mailto:Alla.Maevskaia@cern.ch">Alla Maevskaia</a>.
103 ///////////////////////////////////////////////////////////////////////////////
105 #include <iostream.h>
112 #include "TGeometry.h"
114 #include "TParticle.h"
117 #include "AliSTART.h"
118 #include "AliSTARTdigit.h"
120 #include "AliSTARThit.h"
121 #include "AliSTARThitPhoton.h"
122 #include "AliSTARTvertex.h"
126 static AliSTARTdigit *digits;
128 //_____________________________________________________________________________
132 // Default constructor for class AliSTART
140 //_____________________________________________________________________________
141 AliSTART::AliSTART(const char *name, const char *title)
142 : AliDetector(name,title)
145 // Standard constructor for START Detector
150 // Initialise Hit array
151 fHits = new TClonesArray("AliSTARThit", 405);
152 gAlice->AddHitList(fHits);
154 fPhotons = new TClonesArray("AliSTARThitPhoton", 10000);
155 gAlice->AddHitList (fPhotons);
160 SetMarkerColor(kRed);
163 //_____________________________________________________________________________
164 AliSTART::~AliSTART() {
175 //_____________________________________________________________________________
176 void AliSTART::AddHit(Int_t track, Int_t *vol, Float_t *hits)
181 TClonesArray &lhits = *fHits;
182 new(lhits[fNhits++]) AliSTARThit(fIshunt,track,vol,hits);
185 //_____________________________________________________________________________
186 void AliSTART::AddHitPhoton(Int_t track, Int_t *vol, Float_t *hits)
188 // Add a START hit of photons
190 TClonesArray &lhits = *fPhotons;
191 new(lhits[fNPhotons++]) AliSTARThitPhoton(fIshunt,track,vol,hits);
194 //_____________________________________________________________________________
196 void AliSTART::AddDigit(Int_t *tracks,Int_t *digits)
199 // Add a START digit to the list. Dummy function.
203 //_____________________________________________________________________________
204 void AliSTART::BuildGeometry()
207 // Build simple ROOT TNode geometry for event display
210 const int kColorSTART = 19;
212 top=gAlice->GetGeometry()->GetNode("alice");
214 // START define the different volumes
215 new TRotMatrix("rotx999","rot999", 90,0,90,90,180,0);
217 new TTUBE("S_0ST1","START volume 1","void",5.,10.7,5.3);
219 node = new TNode("0ST1","0ST01","S_0ST1",0,0,69.7,"");
220 node->SetLineColor(kColorSTART);
223 new TTUBE("S_0ST2","START volume 2","void",5.,10.7,5.3);
225 node = new TNode("0ST2","0ST2","S_0ST2",0,0,-350,"rotx999");
226 node->SetLineColor(kColorSTART);
230 //_____________________________________________________________________________
231 Int_t AliSTART::DistanceToPrimitive(Int_t px, Int_t py)
234 // Calculate the distance from the mouse to the START on the screen
240 //-------------------------------------------------------------------------
241 void AliSTART::Init()
244 // Initialis the START after it has been built
248 printf("\n%s: ",ClassName());
249 for(i=0;i<35;i++) printf("*");
250 printf(" START_INIT ");
251 for(i=0;i<35;i++) printf("*");
252 printf("\n%s: ",ClassName());
254 // Here the START initialisation code (if any!)
255 for(i=0;i<80;i++) printf("*");
260 //---------------------------------------------------------------------------
261 void AliSTART::MakeBranch(Option_t* option, const char *file)
264 // Specific START branches
266 // Create Tree branches for the START.
267 Int_t buffersize = 4000;
269 sprintf(branchname,"%s",GetName());
271 AliDetector::MakeBranch(option,file);
273 const char *cD = strstr(option,"D");
274 const char *cH = strstr(option,"H");
278 sprintf (branchname, "%shitPhoton", GetName());
279 MakeBranchInTree (gAlice->TreeH(), branchname, &fPhotons, 50000, file);
284 digits = new AliSTARTdigit();
285 MakeBranchInTree(gAlice->TreeD(),
286 branchname, "AliSTARTdigit", digits, buffersize, 1, file);
289 char *cR = strstr(option,"R");
292 MakeBranchInTree(gAlice->TreeR(),
293 branchname, "Int_t", &fZposit, buffersize, 1, file);
298 //_____________________________________________________________________________
299 void AliSTART::ResetHits()
301 AliDetector::ResetHits();
304 if (fPhotons) fPhotons->Clear();
307 //_____________________________________________________________________________
308 void AliSTART::SetTreeAddress()
313 AliDetector::SetTreeAddress();
314 treeH = gAlice->TreeH();
319 branch = treeH->GetBranch ("STARThitPhoton");
320 if (branch) branch->SetAddress (&fPhotons);
325 //_____________________________________________________________________________
327 void AliSTART::Hit2digit(Int_t evnum)
330 // From hits to digits
338 char nameTH[8],nameTD[8];
339 Float_t timediff,timeright,timeleft,timeav;
340 Float_t besttimeright,besttimeleft,meanTime;
341 Int_t channelWidth=10;
344 AliSTARThit *startHit;
346 Int_t buffersize=256;
348 digits= new AliSTARTdigit();
352 // Event ------------------------- LOOP
354 sprintf(nameTD,"TreeD%d",evnum);
355 TTree *td = new TTree(nameTD,"START");
356 bDig = td->Branch("START","AliSTARTdigit",&digits,buffersize);
363 Int_t nparticles = gAlice->GetEvent(evnum);
364 if (nparticles <= 0) return;
365 printf("\n nparticles %d\n",nparticles);
368 sprintf(nameTH,"TreeH%d",evnum);
369 printf("%s\n",nameTH);
370 TTree *th = gAlice->TreeH();
371 Int_t ntracks = (Int_t) th->GetEntries();
372 if (ntracks<=0) return;
373 // Start loop on tracks in the hits containers
374 for (Int_t track=0; track<ntracks;track++) {
376 nbytes += th->GetEvent(track);
377 particle=gAlice->Particle(track);
378 nhits =fHits->GetEntriesFast();
380 for (hit=0;hit<nhits;hit++) {
381 startHit = (AliSTARThit*)fHits->UncheckedAt(hit);
386 volume = startHit->fVolume;
388 timeright = startHit->fTime;
389 if(timeright<besttimeright) {
390 besttimeright=timeright;
392 }//time for right shoulder
394 timeleft = startHit->fTime;
395 // printf("timeleft %f\n",timeleft);
396 if(timeleft<besttimeleft) {
397 besttimeleft=timeleft;
399 }//time for left shoulder
403 //folding with experimental time distribution
404 Float_t besttimerightGaus=gRandom->Gaus(besttimeright,0.05);
405 Float_t besttimeleftGaus=gRandom->Gaus(besttimeleft,0.05);
406 timediff=besttimerightGaus-besttimeleftGaus;
407 meanTime=(besttimerightGaus+besttimeleftGaus)/2.;
408 if ( TMath::Abs(timediff)<2. && meanTime<3.)
410 //we assume centre of bunch is 5ns after TTS signal
411 //TOF values are relative of the end of bunch
414 ppBunch=ppBunch-10/2;
415 Float_t t1=1000.*besttimeleftGaus;
416 Float_t t2=1000.*besttimerightGaus;
417 t1=t1/channelWidth+ppBunch; //time in ps to channelWidth
418 t2=t2/channelWidth+ppBunch; //time in ps to channelWidth
422 // Time to TDC signal
423 // 256 channels for timediff, range 1ns
425 timediff=128+1000*timediff/channelWidth; // time in ps
427 timeAv = (Int_t)(timeav); // time (ps) channel numbres
428 timeDiff = (Int_t)(timediff); // time ( ps) channel numbres
429 digits->Set(timeAv,timeDiff);
432 {timeAv=999999; timeDiff=99999;}
435 printf("digits-> %d \n",digits->GetTime());