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()
52 // See TRIGGER/DAQ/HLT/DCS Techical Design Report,
53 // p. 58, Table 4.1 for the proposed inputs
56 fInputs.AddLast(new AliTriggerInput("TRD_Unlike_EPair_L1"
57 ,"Unlike electron pair"
59 fInputs.AddLast(new AliTriggerInput("TRD_Like_EPair_L1"
62 fInputs.AddLast(new AliTriggerInput("TRD_Jet_LPt_L1"
65 fInputs.AddLast(new AliTriggerInput("TRD_Jet_HPt_L1"
68 fInputs.AddLast(new AliTriggerInput("TRD_Electron_L1"
71 fInputs.AddLast(new AliTriggerInput("TRD_HadrLPt_L1"
72 ,"Single hadron low pt "
74 fInputs.AddLast(new AliTriggerInput("TRD_HadrHPt_L1"
75 ,"Single hadron high pt"
80 //_____________________________________________________________________________
81 void AliTRDTriggerL1::Trigger()
84 // Run the online tracking and trigger
87 AliRunLoader* runLoader = gAlice->GetRunLoader();
89 AliLoader *loader=runLoader->GetLoader("TRDLoader");
91 // Trigger (tracklets, LTU)
93 AliTRDgeometry *geo = AliTRDgeometry::GetGeometry(runLoader);
95 AliTRDtrigger trdTrigger("Trigger","Trigger class");
97 AliTRDtrigParam *trigp = new AliTRDtrigParam("TRDtrigParam","TRD Trigger parameters");
99 Double_t x[3] = { 0.0, 0.0, 0.0 };
101 gAlice->Field(x,b); // b[] is in kilo Gauss
102 Float_t field = b[2] * 0.1; // Tesla
103 Info("Trigger","Trigger set for magnetic field = %f Tesla \n",field);
105 trigp->SetField(field);
108 trdTrigger.SetParameter(trigp);
109 trdTrigger.SetRunLoader(runLoader);
112 trdTrigger.Open(runLoader->GetFileName(), runLoader->GetEventNumber());
113 trdTrigger.ReadDigits();
114 trdTrigger.MakeTracklets(kTRUE);
115 trdTrigger.WriteTracklets(-1);
117 // Trigger (tracks, GTU)
119 Float_t highPt = trigp->GetHighPt();
120 Float_t jetLowPt = trigp->GetJetLowPt();
121 Float_t jetHighPt = trigp->GetJetHighPt();
127 const Int_t maxEle = 1000;
129 Int_t electronPlus, electronMinus;
130 Int_t sectorElePlus[maxEle], sectorEleMinus[maxEle];
131 Float_t ptElePlus[maxEle], ptEleMinus[maxEle];
132 Int_t hadronLowPt, hadronHighPt;
133 Int_t hadronJetLowPt, hadronJetHighPt;
144 AliTRDgtuTrack *gtuTrack;
145 Int_t nTracks = trdTrigger.GetNumberOfTracks();
146 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
148 gtuTrack = trdTrigger.GetTrack(iTrack);
150 pid = gtuTrack->GetPID();
151 isElectron = gtuTrack->IsElectron();
152 pt = gtuTrack->GetPt();
153 det = gtuTrack->GetDetector();
155 sec = geo->GetSector(det);
160 sectorEleMinus[electronMinus] = sec;
161 ptEleMinus[electronMinus] = pt;
164 sectorElePlus[electronPlus] = sec;
165 ptElePlus[electronPlus] = pt;
171 if (TMath::Abs(pt) < highPt) {
177 if (TMath::Abs(pt) > jetLowPt ) hadronJetLowPt++;
178 if (TMath::Abs(pt) > jetHighPt) hadronJetHighPt++;
184 loader->UnloadTracks();
188 if (hadronLowPt) SetInput("TRD_Hadr_LPt_L1");
189 if (hadronHighPt) SetInput("TRD_Hadr_HPt_L1");
193 if (hadronJetLowPt >= trigp->GetNPartJetLow() ) SetInput("TRD_Jet_LPt_L1");
194 if (hadronJetHighPt >= trigp->GetNPartJetHigh()) SetInput("TRD_Jet_HPt_L1");
196 // electron-positron pairs (open angle > 80 deg)
198 Int_t secPlus, secMinus, secDiff;
199 Bool_t electronUnlikePair = kFALSE;
200 Bool_t electronUnlikePairHPt = kFALSE;
202 if (electronMinus > 0 && electronPlus > 0) {
203 for (Int_t iPlus = 0; iPlus < electronPlus; iPlus++) {
204 secPlus = sectorElePlus[iPlus];
205 for (Int_t iMinus = 0; iMinus < electronMinus; iMinus++) {
206 secMinus = sectorEleMinus[iMinus];
207 secDiff = TMath::Abs(secPlus-secMinus);
208 if (secDiff > 9) secDiff = 18 - secDiff;
210 electronUnlikePair = kTRUE;
211 if (TMath::Abs(ptElePlus[iPlus]) > highPt && TMath::Abs(ptEleMinus[iMinus]) > highPt) {
212 electronUnlikePairHPt = kTRUE;
219 if (electronUnlikePair) SetInput("TRD_Unlike_EPair_L1");
220 //if (electronUnlikePairHPt) SetInput("TRD_Unlike_EPair_HPt_L1");
222 // like electron/positron pairs
224 Bool_t ele1, ele1HPt;
225 Bool_t ele2, ele2HPt;
233 if (electronPlus > 1) {
234 for (Int_t iPlus = 0; iPlus < electronPlus; iPlus++) {
240 if (TMath::Abs(ptElePlus[iPlus]) > highPt) {
243 } else if (!ele2HPt) {
250 if (ele1 && ele2 ) SetInput("TRD_Like_EPair_L1");
251 //if (ele1HPt && ele2HPt) SetInput("TRD_Like_EPair_HPt_L1");
259 if (electronMinus > 1) {
260 for (Int_t iMinus = 0; iMinus < electronMinus; iMinus++) {
266 if (TMath::Abs(ptEleMinus[iMinus]) > highPt) {
269 } else if (!ele2HPt) {
276 if (ele1 && ele2 ) SetInput("TRD_Like_EPair_L1");
277 //if (ele1HPt && ele2HPt) SetInput("TRD_Like_EPair_HPt_L1");
279 // single electron/positron
281 if (electronPlus > 0 || electronMinus > 0) {
282 SetInput("TRD_Electron_L1");
284 for (Int_t iPlus = 0; iPlus < electronPlus; iPlus++) {
285 if (TMath::Abs(ptElePlus[iPlus]) > highPt) SetInput("TRD_Electron_HPt_L1");
288 for (Int_t iMinus = 0; iMinus < electronMinus; iMinus++) {
289 if (TMath::Abs(ptEleMinus[iMinus]) > highPt) SetInput("TRD_Electron_HPt_L1");