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 **************************************************************************/
16 ///////////////////////////////////////////////////////
19 // TRD main trigger class for L1 //
22 ///////////////////////////////////////////////////////
27 #include "AliTriggerInput.h"
29 #include "AliTRDTriggerL1.h"
30 #include "AliTRDtrigParam.h"
31 #include "AliTRDtrigger.h"
32 #include "AliTRDgtuTrack.h"
33 #include "AliTRDgeometry.h"
35 ClassImp(AliTRDTriggerL1)
37 //_____________________________________________________________________________
38 AliTRDTriggerL1::AliTRDTriggerL1():AliTriggerDetector()
41 // Default constructor
48 //_____________________________________________________________________________
49 void AliTRDTriggerL1::CreateInputs()
53 // See TRIGGER/DAQ/HLT/DCS Techical Design Report, p. 58, Table 4.1 for the proposed inputs
56 fInputs.AddLast(new AliTriggerInput( "TRD_Unlike_EPair_L1", "Unlike electron pair", 0x01 ));
57 fInputs.AddLast(new AliTriggerInput( "TRD_Like_EPair_L1", "Like electron pair", 0x02 ));
58 fInputs.AddLast(new AliTriggerInput( "TRD_Jet_LPt_L1", "Jet low pt", 0x04 ));
59 fInputs.AddLast(new AliTriggerInput( "TRD_Jet_HPt_L1", "Jet high pt", 0x08 ));
60 fInputs.AddLast(new AliTriggerInput( "TRD_Electron_L1", "Single electron", 0x10 ));
61 fInputs.AddLast(new AliTriggerInput( "TRD_HadrLPt_L1", "Single hadron low pt ", 0x20 ));
62 fInputs.AddLast(new AliTriggerInput( "TRD_HadrHPt_L1", "Single hadron high pt", 0x40 ));
67 //_____________________________________________________________________________
68 void AliTRDTriggerL1::Trigger()
71 // Run the online tracking and trigger
74 AliRunLoader* runLoader = gAlice->GetRunLoader();
76 AliLoader *loader=runLoader->GetLoader("TRDLoader");
78 // Trigger (tracklets, LTU)
80 AliTRDgeometry *geo = AliTRDgeometry::GetGeometry(runLoader);
82 AliTRDtrigger trdTrigger("Trigger","Trigger class");
84 AliTRDtrigParam *trigp = new AliTRDtrigParam("TRDtrigParam","TRD Trigger parameters");
86 Double_t x[3] = { 0.0, 0.0, 0.0 };
88 gAlice->Field(x,b); // b[] is in kilo Gauss
89 Float_t field = b[2] * 0.1; // Tesla
90 Info("Trigger","Trigger set for magnetic field = %f Tesla \n",field);
92 trigp->SetField(field);
95 trdTrigger.SetParameter(trigp);
96 trdTrigger.SetRunLoader(runLoader);
99 trdTrigger.Open(runLoader->GetFileName(), runLoader->GetEventNumber());
100 trdTrigger.ReadDigits();
101 trdTrigger.MakeTracklets(kTRUE);
102 trdTrigger.WriteTracklets(-1);
104 // Trigger (tracks, GTU)
106 Float_t highPt = trigp->GetHighPt();
107 Float_t jetLowPt = trigp->GetJetLowPt();
108 Float_t jetHighPt = trigp->GetJetHighPt();
114 const Int_t maxEle = 1000;
116 Int_t electronPlus, electronMinus;
117 Int_t sectorElePlus[maxEle], sectorEleMinus[maxEle];
118 Float_t ptElePlus[maxEle], ptEleMinus[maxEle];
119 Int_t hadronLowPt, hadronHighPt;
120 Int_t hadronJetLowPt, hadronJetHighPt;
131 AliTRDgtuTrack *gtuTrack;
132 Int_t nTracks = trdTrigger.GetNumberOfTracks();
133 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
135 gtuTrack = trdTrigger.GetTrack(iTrack);
137 pid = gtuTrack->GetPID();
138 isElectron = gtuTrack->IsElectron();
139 pt = gtuTrack->GetPt();
140 det = gtuTrack->GetDetector();
142 sec = geo->GetSector(det);
147 sectorEleMinus[electronMinus] = sec;
148 ptEleMinus[electronMinus] = pt;
151 sectorElePlus[electronPlus] = sec;
152 ptElePlus[electronPlus] = pt;
158 if (TMath::Abs(pt) < highPt) {
164 if (TMath::Abs(pt) > jetLowPt ) hadronJetLowPt++;
165 if (TMath::Abs(pt) > jetHighPt) hadronJetHighPt++;
171 loader->UnloadTracks();
175 if (hadronLowPt) SetInput("TRD_Hadr_LPt_L1");
176 if (hadronHighPt) SetInput("TRD_Hadr_HPt_L1");
180 if (hadronJetLowPt >= trigp->GetNPartJetLow() ) SetInput("TRD_Jet_LPt_L1");
181 if (hadronJetHighPt >= trigp->GetNPartJetHigh()) SetInput("TRD_Jet_HPt_L1");
183 // electron-positron pairs (open angle > 80 deg)
185 Int_t secPlus, secMinus, secDiff;
186 Bool_t electronUnlikePair = kFALSE;
187 Bool_t electronUnlikePairHPt = kFALSE;
189 if (electronMinus > 0 && electronPlus > 0) {
190 for (Int_t iPlus = 0; iPlus < electronPlus; iPlus++) {
191 secPlus = sectorElePlus[iPlus];
192 for (Int_t iMinus = 0; iMinus < electronMinus; iMinus++) {
193 secMinus = sectorEleMinus[iMinus];
194 secDiff = TMath::Abs(secPlus-secMinus);
195 if (secDiff > 9) secDiff = 18 - secDiff;
197 electronUnlikePair = kTRUE;
198 if (TMath::Abs(ptElePlus[iPlus]) > highPt && TMath::Abs(ptEleMinus[iMinus]) > highPt) {
199 electronUnlikePairHPt = kTRUE;
206 if (electronUnlikePair) SetInput("TRD_Unlike_EPair_L1");
207 //if (electronUnlikePairHPt) SetInput("TRD_Unlike_EPair_HPt_L1");
209 // like electron/positron pairs
211 Bool_t ele1, ele1HPt;
212 Bool_t ele2, ele2HPt;
220 if (electronPlus > 1) {
221 for (Int_t iPlus = 0; iPlus < electronPlus; iPlus++) {
227 if (TMath::Abs(ptElePlus[iPlus]) > highPt) {
230 } else if (!ele2HPt) {
237 if (ele1 && ele2 ) SetInput("TRD_Like_EPair_L1");
238 //if (ele1HPt && ele2HPt) SetInput("TRD_Like_EPair_HPt_L1");
246 if (electronMinus > 1) {
247 for (Int_t iMinus = 0; iMinus < electronMinus; iMinus++) {
253 if (TMath::Abs(ptEleMinus[iMinus]) > highPt) {
256 } else if (!ele2HPt) {
263 if (ele1 && ele2 ) SetInput("TRD_Like_EPair_L1");
264 //if (ele1HPt && ele2HPt) SetInput("TRD_Like_EPair_HPt_L1");
266 // single electron/positron
268 if (electronPlus > 0 || electronMinus > 0) {
269 SetInput("TRD_Electron_L1");
271 for (Int_t iPlus = 0; iPlus < electronPlus; iPlus++) {
272 if (TMath::Abs(ptElePlus[iPlus]) > highPt) SetInput("TRD_Electron_HPt_L1");
275 for (Int_t iMinus = 0; iMinus < electronMinus; iMinus++) {
276 if (TMath::Abs(ptEleMinus[iMinus]) > highPt) SetInput("TRD_Electron_HPt_L1");