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 //-----------------------------------------------------------------------------
19 // Class AliMUONTriggerResponseV1
21 // Trigger chamber response
22 // with cluster size activated
23 //-----------------------------------------------------------------------------
25 #include "AliMUONResponseTriggerV1.h"
27 #include "AliMUONDigit.h"
28 #include "AliMUONGeometryTransformer.h"
29 #include "AliMUONConstants.h"
32 #include "AliMpSegmentation.h"
33 #include "AliMpVSegmentation.h"
34 #include "AliMpCathodType.h"
42 ClassImp(AliMUONResponseTriggerV1)
49 return static_cast<AliMUON*>(gAlice->GetModule("MUON"));
52 void Global2Local(Int_t detElemId, Double_t xg, Double_t yg, Double_t zg,
53 Double_t& xl, Double_t& yl, Double_t& zl)
55 // ideally should be :
57 // AliMUONGeometry::Global2Local(detElemId,xg,yg,zg,x,y,z);
58 // but while waiting for this geometry singleton, let's go through
61 const AliMUONGeometryTransformer* transformer = muon()->GetGeometryTransformer();
62 transformer->Global2Local(detElemId,xg,yg,zg,xl,yl,zl);
67 //------------------------------------------------------------------
68 AliMUONResponseTriggerV1::AliMUONResponseTriggerV1()
69 : AliMUONResponseTrigger(),
75 /// default constructor
80 //------------------------------------------------------------------
81 AliMUONResponseTriggerV1::AliMUONResponseTriggerV1(Float_t hv)
82 : AliMUONResponseTrigger(),
92 //------------------------------------------------------------------
93 AliMUONResponseTriggerV1::~AliMUONResponseTriggerV1()
98 //------------------------------------------------------------------
99 void AliMUONResponseTriggerV1::SetParameters(Float_t hv)
101 /// initialize parameters accoring to HV
102 /// (see V.Barret B.Espagnon and P.Rosnet Alice/note xxx)
103 /// this parametrisation is valid only for the "streamer" mode
104 fA = 6.089 * hv - 52.70;
106 fC = 4.3e-4 * hv - 3.5e-3;
109 //------------------------------------------------------------------
110 Int_t AliMUONResponseTriggerV1::SetGenerCluster()
112 /// Set the GenerCluster parameter and return 1
113 fGenerCluster = gRandom->Rndm();
117 //------------------------------------------------------------------
118 Float_t AliMUONResponseTriggerV1::FireStripProb(Float_t x4, Float_t theta)
121 /// parametrisation of the probability that a strip neighbour of the main
122 /// strip is fired (V.Barret B.Espagnon and P.Rosnet INT/DIM/01-04 (2001)
123 /// WARNING : need to convert x4 from cm to mm
124 /// this parametrisation is valid only for the "streamer" mode
127 (TMath::Cos(theta)*fA/(fA+TMath::Cos(theta)*TMath::Power(x4*10.,fB))+fC)/
128 (TMath::Cos(theta)+fC);
131 //------------------------------------------------------------------
132 void AliMUONResponseTriggerV1::DisIntegrate(const AliMUONHit& hit, TList& digits, Float_t /*timeDif*/)
134 /// Generate digits (on each cathode) from 1 hit, with cluster-size
139 Float_t xhit = hit.X();
140 Float_t yhit = hit.Y();
141 Float_t zhit = hit.Z();
142 Int_t detElemId = hit.DetElemId();
145 Global2Local(detElemId,xhit,yhit,zhit,x,y,z);
147 Float_t tof = hit.Age();
148 Int_t twentyNano(100);
149 if (tof<AliMUONConstants::TriggerTofLimit())
156 for ( Int_t cath = AliMp::kCath0; cath <= AliMp::kCath1; ++cath )
158 const AliMpVSegmentation* seg
159 = AliMpSegmentation::Instance()
160 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cath));
162 AliMpPad pad = seg->PadByPosition(x,y,kFALSE);
163 Int_t ix = pad.GetIx();
164 Int_t iy = pad.GetIy();
166 AliDebug(1,Form("xhit,yhit=%e,%e lx,ly,lz=%e,%e,%e ix,iy=%d,%d",
167 xhit,yhit,x,y,z,ix,iy));
169 if ( !pad.IsValid() )
171 AliWarning(Form("hit w/o strip %d-%d xhit,yhit=%e,%e local x,y,z "
172 "%e,%e,%e ix,iy=%d,%d",detElemId,
174 xhit,yhit,x,y,z,ix,iy));
178 if ( cath == AliMp::kCath0 ) nboard = pad.GetLocalBoardId(0);
180 AliMUONDigit* d = new AliMUONDigit(detElemId,nboard,
181 pad.GetLocalBoardChannel(0),
185 d->SetCharge(twentyNano);
190 SetGenerCluster(); // 1 randum number per cathode (to be checked)
192 Int_t xList[10], yList[10];
193 Neighbours(cath,ix,iy,xList,yList);
195 // cout << " detElemId cath ix iy = " << detElemId << " " << cath
196 // << " " << ix << " " << iy << "\n";
197 // for (Int_t i=0; i<10; i++) cout << " " << xList[i] << " " << yList[i];
200 Int_t qp = 0; // fired/no-fired strip = 1/0
201 for (Int_t i=0; i<10; i++) { // loop on neighbors
202 if (i==0||i==5||qp!=0) { // built-up cluster
204 // need to iterate in iy/ix for bending/non-bending plane
205 Int_t ixNeigh = ( cath == 0 ) ? ix : xList[i];
206 Int_t iyNeigh = ( cath == 0 ) ? yList[i] : iy;
208 AliMpPad padNeigh = seg->PadByIndices(ixNeigh,iyNeigh,kFALSE);
209 if(padNeigh.IsValid()){ // existing neighbourg
211 Int_t dix=-(ixNeigh-ix);
212 Int_t diy=-(iyNeigh-iy);
213 Float_t xlocalNeigh = padNeigh.GetPositionX();
214 Float_t ylocalNeigh = padNeigh.GetPositionY();
215 Float_t dpx = padNeigh.GetDimensionX();
216 Float_t dpy = padNeigh.GetDimensionY();
217 Float_t distX = TMath::Abs((Float_t)dix) * ((Float_t)dix * dpx + xlocalNeigh - x);
218 Float_t distY = TMath::Abs((Float_t)diy) * ((Float_t)diy * dpy + ylocalNeigh - y);
219 Float_t dist = TMath::Sqrt(distX*distX+distY*distY);
221 // cout << " here " << dist << " " << fGenerCluster << " " << FireStripProb(dist,0) << "\n";
223 if (fGenerCluster<FireStripProb(dist,0)) qp = 1;
226 if (qp == 1) { // this digit is fired
227 Int_t neighBoard = 0;
228 if ( cath == AliMp::kCath0 ) neighBoard = padNeigh.GetLocalBoardId(0);
230 const AliMpVSegmentation* seg0
231 = AliMpSegmentation::Instance()
232 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(AliMp::kCath0));
233 AliMpPad padNeigh0 = seg0->PadByPosition(xlocalNeigh, y, kFALSE);
234 if ( ! padNeigh0.IsValid() ) continue; // This can happen only on the cut RPC, at boards 25, 30, 142 and 147
235 neighBoard = padNeigh0.GetLocalBoardId(0);
237 AliMUONDigit* dNeigh = new AliMUONDigit(detElemId,neighBoard,
238 padNeigh.GetLocalBoardChannel(0),
241 dNeigh->SetPadXY(ixNeigh,iyNeigh);
242 dNeigh->SetCharge(twentyNano);
246 } // built-up cluster
247 } // loop on neighbors
251 //------------------------------------------------------------------
252 void AliMUONResponseTriggerV1::Neighbours(const Int_t cath,
253 const Int_t ix, const Int_t iy,
254 Int_t Xlist[10], Int_t Ylist[10]) const
256 ///-----------------BENDING----------------------------------------- /n
257 /// Returns list of 10 next neighbours for given X strip (ix, iy) /n
258 /// neighbour number 4 in the list - /n
259 /// neighbour number 3 in the list | /n
260 /// neighbour number 2 in the list |_ Upper part /n
261 /// neighbour number 1 in the list | /n
262 /// neighbour number 0 in the list - /n
263 /// X strip (ix, iy) /n
264 /// neighbour number 5 in the list - /n
265 /// neighbour number 6 in the list | _ Lower part /n
266 /// neighbour number 7 in the list | /n
267 /// neighbour number 8 in the list | /n
268 /// neighbour number 9 in the list - /n
270 ///-----------------NON-BENDING------------------------------------- /n
271 /// Returns list of 10 next neighbours for given Y strip (ix, iy) /n
272 /// neighbour number 9 8 7 6 5 (Y strip (ix, iy)) 0 1 2 3 4 in the list /n
273 /// |_______| |_______/ /n
277 for (Int_t i=0; i<10; i++) {
282 Int_t iList[10]={9,8,7,6,5, 0,1,2,3,4};
284 // need to iterate in iy/ix for bending/non-bending plane
285 Int_t iNeigh = ( cath == 0 ) ? iy : ix;
288 for (Int_t j=iNeigh-5; j<=iNeigh+5; j++){
289 if (j == iNeigh) continue;
290 // need to iterate in iy/ix for bending/non-bending plane
291 Int_t ixNeigh = ( cath == 0 ) ? ix : j;
292 Int_t iyNeigh = ( cath == 0 ) ? j : iy;
294 // cout << " " << cath << " " << ix << " " << iy
295 // << " " << ixNeigh << " " << iyNeigh << "\n";
297 Xlist[iList[i]]=ixNeigh;
298 Ylist[iList[i]]=iyNeigh;