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[u/mrichter/AliRoot.git] / MUON / AliMUONResponseTriggerV1.cxx
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e087fe7f 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
30178c30 16/* $Id$ */
e087fe7f 17
3d1463c8 18//-----------------------------------------------------------------------------
d1525c79 19// Class AliMUONTriggerResponseV1
20// ------------------
21// Trigger chamber response
22// with cluster size activated
3d1463c8 23//-----------------------------------------------------------------------------
d1525c79 24
e087fe7f 25#include "AliMUONResponseTriggerV1.h"
4e702a25 26#include "AliMUON.h"
27#include "AliMUONDigit.h"
28#include "AliMUONGeometryTransformer.h"
d344444e 29#include "AliMUONConstants.h"
e087fe7f 30
9265505b 31#include "AliMpPad.h"
32#include "AliMpSegmentation.h"
33#include "AliMpVSegmentation.h"
866c3232 34#include "AliMpCathodType.h"
9265505b 35
36#include "AliRun.h"
37
38#include <TMath.h>
39#include <TRandom.h>
40
41/// \cond CLASSIMP
e087fe7f 42ClassImp(AliMUONResponseTriggerV1)
9265505b 43/// \endcond
e087fe7f 44
4e702a25 45namespace
46{
47 AliMUON* muon()
48 {
49 return static_cast<AliMUON*>(gAlice->GetModule("MUON"));
50 }
51
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)
54 {
55 // ideally should be :
56 // Double_t x,y,z;
57 // AliMUONGeometry::Global2Local(detElemId,xg,yg,zg,x,y,z);
58 // but while waiting for this geometry singleton, let's go through
59 // AliMUON still.
60
61 const AliMUONGeometryTransformer* transformer = muon()->GetGeometryTransformer();
62 transformer->Global2Local(detElemId,xg,yg,zg,xl,yl,zl);
63 }
64
4e702a25 65}
66
e087fe7f 67//------------------------------------------------------------------
30178c30 68AliMUONResponseTriggerV1::AliMUONResponseTriggerV1()
1657f946 69 : AliMUONResponseTrigger(),
70 fGenerCluster(0),
71 fA(0),
72 fB(0),
73 fC(0)
30178c30 74{
9265505b 75/// default constructor
e087fe7f 76 Float_t hv=9.2;
77 SetParameters(hv);
78}
79
80//------------------------------------------------------------------
30178c30 81AliMUONResponseTriggerV1::AliMUONResponseTriggerV1(Float_t hv)
1657f946 82 : AliMUONResponseTrigger(),
83 fGenerCluster(0),
84 fA(0),
85 fB(0),
86 fC(0)
30178c30 87{
9265505b 88/// Constructor
e087fe7f 89 SetParameters(hv);
90}
91
92//------------------------------------------------------------------
9265505b 93AliMUONResponseTriggerV1::~AliMUONResponseTriggerV1()
94{
95/// destructor
96}
97
98//------------------------------------------------------------------
99void AliMUONResponseTriggerV1::SetParameters(Float_t hv)
100{
101/// initialize parameters accoring to HV
102/// (see V.Barret B.Espagnon and P.Rosnet Alice/note xxx)
e087fe7f 103 fA = 6.089 * hv - 52.70;
104 fB = 2.966;
105 fC = 4.3e-4 * hv - 3.5e-3;
106}
107
108//------------------------------------------------------------------
9265505b 109Int_t AliMUONResponseTriggerV1::SetGenerCluster()
110{
111/// Set the GenerCluster parameter and return 1
e087fe7f 112 fGenerCluster = gRandom->Rndm();
113 return 1;
337c9041 114}
e087fe7f 115
116//------------------------------------------------------------------
85fec35d 117Float_t AliMUONResponseTriggerV1::FireStripProb(Float_t x4, Float_t theta)
118const
119{
71a2d3aa 120/// parametrisation of the probability that a strip neighbour of the main
121/// strip is fired (V.Barret B.Espagnon and P.Rosnet INT/DIM/01-04 (2001)
122/// WARNING : need to convert x4 from cm to mm
e087fe7f 123
4e702a25 124 return
125 (TMath::Cos(theta)*fA/(fA+TMath::Cos(theta)*TMath::Power(x4*10.,fB))+fC)/
126 (TMath::Cos(theta)+fC);
127}
128
129//------------------------------------------------------------------
130void AliMUONResponseTriggerV1::DisIntegrate(const AliMUONHit& hit, TList& digits)
131{
9265505b 132 /// Generate digits (on each cathode) from 1 hit, with cluster-size
133 /// generation.
4e702a25 134
135 digits.Clear();
136
137 Float_t xhit = hit.X();
138 Float_t yhit = hit.Y();
139 Float_t zhit = 0; // FIXME : should it be hit.Z() ?
140 Int_t detElemId = hit.DetElemId();
141
142 Double_t x,y,z;
143 Global2Local(detElemId,xhit,yhit,zhit,x,y,z);
144
145 Float_t tof = hit.Age();
146 Int_t twentyNano(100);
d344444e 147 if (tof<AliMUONConstants::TriggerTofLimit())
4e702a25 148 {
149 twentyNano=1;
150 }
151
866c3232 152 for ( Int_t cath = AliMp::kCath0; cath <= AliMp::kCath1; ++cath )
4e702a25 153 {
9265505b 154 const AliMpVSegmentation* seg
866c3232 155 = AliMpSegmentation::Instance()
156 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cath));
4e702a25 157
158 AliMpPad pad = seg->PadByPosition(TVector2(x,y),kFALSE);
159 Int_t ix = pad.GetIndices().GetFirst();
160 Int_t iy = pad.GetIndices().GetSecond();
161
8c0b5e70 162 AliMUONDigit* d = new AliMUONDigit(detElemId,pad.GetLocation(0).GetFirst(),
163 pad.GetLocation(0).GetSecond(),
2a7d64a9 164 cath);
165 d->SetPadXY(ix,iy);
4e702a25 166
2a7d64a9 167 d->SetCharge(twentyNano);
4e702a25 168 digits.Add(d);
169
170 SetGenerCluster(); // 1 randum number per cathode (to be checked)
171
172 Int_t xList[10], yList[10];
173 Neighbours(cath,ix,iy,xList,yList);
174
175// cout << " detElemId cath ix iy = " << detElemId << " " << cath
176// << " " << ix << " " << iy << "\n";
177// for (Int_t i=0; i<10; i++) cout << " " << xList[i] << " " << yList[i];
178// cout << "\n";
179
180 Int_t qp = 0; // fired/no-fired strip = 1/0
181 for (Int_t i=0; i<10; i++) { // loop on neighbors
182 if (i==0||i==5||qp!=0) { // built-up cluster
183
184 // need to iterate in iy/ix for bending/non-bending plane
185 Int_t ixNeigh = ( cath == 0 ) ? ix : xList[i];
186 Int_t iyNeigh = ( cath == 0 ) ? yList[i] : iy;
187
188 AliMpIntPair pairNeigh = AliMpIntPair(ixNeigh,iyNeigh);
189 AliMpPad padNeigh = seg->PadByIndices(pairNeigh,kFALSE);
190 if(padNeigh.IsValid()){ // existing neighbourg
191
192 Int_t dix=-(ixNeigh-ix);
193 Int_t diy=-(iyNeigh-iy);
194 Float_t xlocalNeigh = padNeigh.Position().X();
195 Float_t ylocalNeigh = padNeigh.Position().Y();
196 Float_t dpx = padNeigh.Dimensions().X();
197 Float_t dpy = padNeigh.Dimensions().Y();
198 Float_t distX = TMath::Abs((Float_t)dix) * ((Float_t)dix * dpx + xlocalNeigh - x);
199 Float_t distY = TMath::Abs((Float_t)diy) * ((Float_t)diy * dpy + ylocalNeigh - y);
200 Float_t dist = TMath::Sqrt(distX*distX+distY*distY);
201
202// cout << " here " << dist << " " << fGenerCluster << " " << FireStripProb(dist,0) << "\n";
203
204 if (fGenerCluster<FireStripProb(dist,0)) qp = 1;
205 else qp = 0;
206
207 if (qp == 1) { // this digit is fired
8c0b5e70 208 AliMUONDigit* dNeigh = new AliMUONDigit(detElemId,padNeigh.GetLocation(0).GetFirst(),
209 padNeigh.GetLocation(0).GetSecond(),
2a7d64a9 210 cath);
4e702a25 211
2a7d64a9 212 dNeigh->SetPadXY(ixNeigh,iyNeigh);
213 dNeigh->SetCharge(twentyNano);
4e702a25 214 digits.Add(dNeigh);
215 } // digit fired
216 } // pad is valid
217 } // built-up cluster
218 } // loop on neighbors
219 } // loop on cathode
220}
221
222//------------------------------------------------------------------
223void AliMUONResponseTriggerV1::Neighbours(const Int_t cath,
224 const Int_t ix, const Int_t iy,
225 Int_t Xlist[10], Int_t Ylist[10])
226{
9265505b 227 ///-----------------BENDING----------------------------------------- /n
228 /// Returns list of 10 next neighbours for given X strip (ix, iy) /n
229 /// neighbour number 4 in the list - /n
230 /// neighbour number 3 in the list | /n
231 /// neighbour number 2 in the list |_ Upper part /n
232 /// neighbour number 1 in the list | /n
233 /// neighbour number 0 in the list - /n
234 /// X strip (ix, iy) /n
235 /// neighbour number 5 in the list - /n
236 /// neighbour number 6 in the list | _ Lower part /n
237 /// neighbour number 7 in the list | /n
238 /// neighbour number 8 in the list | /n
239 /// neighbour number 9 in the list - /n
240 /// /n
241 ///-----------------NON-BENDING------------------------------------- /n
242 /// Returns list of 10 next neighbours for given Y strip (ix, iy) /n
243 /// neighbour number 9 8 7 6 5 (Y strip (ix, iy)) 0 1 2 3 4 in the list /n
c4ee792d 244 /// |_______| |_______/ /n
245
9265505b 246 /// left right /n
4e702a25 247
248 for (Int_t i=0; i<10; i++) {
249 Xlist[i]=-1;
250 Ylist[i]=-1;
251 }
252
253 Int_t iList[10]={9,8,7,6,5, 0,1,2,3,4};
254
255 // need to iterate in iy/ix for bending/non-bending plane
256 Int_t iNeigh = ( cath == 0 ) ? iy : ix;
257
258 Int_t i=0;
259 for (Int_t j=iNeigh-5; j<=iNeigh+5; j++){
260 if (j == iNeigh) continue;
261 // need to iterate in iy/ix for bending/non-bending plane
262 Int_t ixNeigh = ( cath == 0 ) ? ix : j;
263 Int_t iyNeigh = ( cath == 0 ) ? j : iy;
264
265// cout << " " << cath << " " << ix << " " << iy
266// << " " << ixNeigh << " " << iyNeigh << "\n";
267
268 Xlist[iList[i]]=ixNeigh;
269 Ylist[iList[i]]=iyNeigh;
270 i++;
271 }
e087fe7f 272}
273