1 Int_t AliITSHits2Digits()
4 // Connect the Root Galice file containing Geometry, Kine and Hits
6 const char * inFile = "galice.root";
7 TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject(inFile);
8 if (file) {file->Close(); delete file;}
9 printf("Hits2Digits\n");
10 file = new TFile(inFile,"UPDATE");
11 if (!file->IsOpen()) {
12 cerr<<"Can't open "<<inFile<<" !\n";
17 // Get AliRun object from file or return if not on file
18 if (gAlice) delete gAlice;
19 gAlice = (AliRun*)file->Get("gAlice");
21 cerr<<"ITSHits2Digits.C : AliRun object not found on file\n";
26 AliITS *ITS = (AliITS*)gAlice->GetDetector("ITS");
28 cerr<<"ITSHits2Digits.C : AliITS object not found on file\n";
32 // Set the simulation models for the three detector types
33 AliITSgeom *geom = ITS->GetITSgeom();
36 AliITSDetType *iDetType=ITS->DetType(0);
37 AliITSsegmentationSPD *seg0=(AliITSsegmentationSPD*)iDetType->GetSegmentationModel();
38 AliITSresponseSPD *res0 = (AliITSresponseSPD*)iDetType->GetResponseModel();
39 AliITSsimulationSPD *sim0=new AliITSsimulationSPD(seg0,res0);
40 ITS->SetSimulationModel(0,sim0);
42 printf("SPD dimensions %f %f \n",seg0->Dx(),seg0->Dz());
43 printf("SPD npixels %d %d \n",seg0->Npz(),seg0->Npx());
44 printf("SPD pitches %d %d \n",seg0->Dpz(0),seg0->Dpx(0));
48 // Set response parameters
49 // SDD compression param: 2 fDecrease, 2fTmin, 2fTmax or disable, 2 fTolerance
50 AliITSDetType *iDetType=ITS->DetType(1);
51 AliITSresponseSDD *res1 = (AliITSresponseSDD*)iDetType->GetResponseModel();
53 res1=new AliITSresponseSDD();
54 ITS->SetResponseModel(1,res1);
58 res1->GetNoiseParam(noise,baseline);
59 Float_t noise_after_el = res1->GetNoiseAfterElectronics();
60 cout << "noise_after_el: " << noise_after_el << endl;
63 fCutAmp += (2.*noise_after_el); // noise
64 cout << "Cut amplitude: " << fCutAmp << endl;
65 Int_t cp[8]={0,0,fCutAmp,fCutAmp,0,0,0,0};
66 res1->SetCompressParam(cp);
69 AliITSsegmentationSDD *seg1=(AliITSsegmentationSDD*)iDetType->GetSegmentationModel();
71 seg1 = new AliITSsegmentationSDD(geom,res1);
72 ITS->SetSegmentationModel(1,seg1);
74 AliITSsimulationSDD *sim1=new AliITSsimulationSDD(seg1,res1);
75 ITS->SetSimulationModel(1,sim1);
78 AliITSDetType *iDetType=ITS->DetType(2);
79 AliITSsegmentationSSD *seg2=(AliITSsegmentationSSD*)iDetType->GetSegmentationModel();
80 AliITSresponseSSD *res2 = (AliITSresponseSSD*)iDetType->GetResponseModel();
81 res2->SetSigmaSpread(3.,2.);
82 AliITSsimulationSSD *sim2=new AliITSsimulationSSD(seg2,res2);
83 ITS->SetSimulationModel(2,sim2);
85 cerr<<"Digitizing ITS...\n";
87 if(!gAlice->TreeD()) gAlice->MakeTree("D");
88 printf("TreeD %p\n",gAlice->TreeD());
94 ITS->HitsToDigits(0,0,-1," ","All"," ");
95 timer.Stop(); timer.Print();
102 delete gAlice; gAlice=0;