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a9e2aefa | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
a9e2aefa | 18 | |
30178c30 | 19 | #include "AliMUONResponseV0.h" |
885d501b | 20 | |
f29ba3e1 | 21 | #include "AliLog.h" |
885d501b | 22 | #include "AliMUON.h" |
23 | #include "AliMUONConstants.h" | |
24 | #include "AliMUONDigit.h" | |
25 | #include "AliMUONGeometrySegmentation.h" | |
26 | #include "AliMUONGeometryTransformer.h" | |
27 | #include "AliMUONHit.h" | |
28 | #include "AliMUONSegmentation.h" | |
29 | #include "AliMpArea.h" | |
30 | #include "AliMpDEManager.h" | |
31 | #include "AliMpPlaneType.h" | |
32 | #include "AliMpStationType.h" | |
33 | #include "AliMpVPadIterator.h" | |
34 | #include "AliMpVSegmentation.h" | |
35 | #include "AliRun.h" | |
36 | #include "Riostream.h" | |
37 | #include "TVector2.h" | |
38 | #include <TMath.h> | |
39 | #include <TRandom.h> | |
8c343c7c | 40 | |
d5bfadcc | 41 | ClassImp(AliMUONResponseV0) |
42 | ||
885d501b | 43 | AliMUON* muon() |
44 | { | |
45 | return static_cast<AliMUON*>(gAlice->GetModule("MUON")); | |
46 | } | |
47 | ||
48 | void Global2Local(Int_t detElemId, Double_t xg, Double_t yg, Double_t zg, | |
49 | Double_t& xl, Double_t& yl, Double_t& zl) | |
50 | { | |
51 | // ideally should be : | |
52 | // Double_t x,y,z; | |
53 | // AliMUONGeometry::Global2Local(detElemId,xg,yg,zg,x,y,z); | |
54 | // but while waiting for this geometry singleton, let's go through | |
55 | // AliMUON still. | |
56 | ||
57 | const AliMUONGeometryTransformer* transformer = muon()->GetGeometryTransformer(); | |
58 | transformer->Global2Local(detElemId,xg,yg,zg,xl,yl,zl); | |
59 | } | |
60 | ||
61 | AliMUONSegmentation* Segmentation() | |
62 | { | |
63 | static AliMUONSegmentation* segmentation = muon()->GetSegmentation(); | |
64 | return segmentation; | |
65 | } | |
66 | ||
30178c30 | 67 | //__________________________________________________________________________ |
68 | AliMUONResponseV0::AliMUONResponseV0() | |
885d501b | 69 | : AliMUONResponse(), |
70 | fChargeSlope(0.0), | |
71 | fChargeSpreadX(0.0), | |
72 | fChargeSpreadY(0.0), | |
73 | fSigmaIntegration(0.0), | |
74 | fMaxAdc(0), | |
75 | fZeroSuppression(0), | |
76 | fChargeCorrel(0.0), | |
77 | fMathieson(new AliMUONMathieson), | |
78 | fChargeThreshold(1e-4) | |
30178c30 | 79 | { |
885d501b | 80 | // Normal constructor |
81 | AliDebug(1,Form("Default ctor")); | |
30178c30 | 82 | } |
f29ba3e1 | 83 | |
84 | //_________________________________________________________________________ | |
85 | AliMUONResponseV0::AliMUONResponseV0(const AliMUONResponseV0& rhs) | |
86 | : AliMUONResponse(rhs) | |
87 | { | |
88 | // Protected copy constructor | |
89 | ||
90 | AliFatal("Not implemented."); | |
91 | } | |
92 | ||
a713db22 | 93 | //__________________________________________________________________________ |
94 | AliMUONResponseV0::~AliMUONResponseV0() | |
95 | { | |
885d501b | 96 | AliDebug(1,""); |
a713db22 | 97 | delete fMathieson; |
98 | } | |
f29ba3e1 | 99 | |
100 | //________________________________________________________________________ | |
101 | AliMUONResponseV0& AliMUONResponseV0::operator = (const AliMUONResponseV0& rhs) | |
102 | { | |
103 | // Protected assignement operator | |
104 | ||
105 | if (this == &rhs) return *this; | |
106 | ||
107 | AliFatal("Not implemented."); | |
108 | ||
109 | return *this; | |
885d501b | 110 | } |
111 | ||
112 | //______________________________________________________________________________ | |
113 | void | |
114 | AliMUONResponseV0::Print(Option_t*) const | |
115 | { | |
116 | cout << " ChargeSlope=" << fChargeSlope | |
117 | << " ChargeSpreadX,Y=" << fChargeSpreadX | |
118 | << fChargeSpreadY | |
119 | << " ChargeCorrelation=" << fChargeCorrel | |
120 | << endl; | |
121 | ||
122 | //Float_t fChargeSlope; // Slope of the charge distribution | |
123 | //Float_t fChargeSpreadX; // Width of the charge distribution in x | |
124 | //Float_t fChargeSpreadY; // Width of the charge distribution in y | |
125 | //Float_t fSigmaIntegration; // Number of sigma's used for charge distribution | |
126 | //Int_t fMaxAdc; // Maximum ADC channel | |
127 | //Int_t fSaturation; // Pad saturation in ADC channel | |
128 | //Int_t fZeroSuppression; // Zero suppression threshold | |
129 | //Float_t fChargeCorrel; // amplitude of charge correlation on 2 cathods | |
130 | // // is RMS of ln(q1/q2) | |
131 | //AliMUONMathieson* fMathieson; // pointer to mathieson fct | |
132 | //Float_t fChargeThreshold; // Charges below this threshold are = 0 | |
133 | // | |
134 | ||
f29ba3e1 | 135 | } |
136 | ||
d5bfadcc | 137 | //__________________________________________________________________________ |
138 | void AliMUONResponseV0::SetSqrtKx3AndDeriveKx2Kx4(Float_t SqrtKx3) | |
139 | { | |
140 | // Set to "SqrtKx3" the Mathieson parameter K3 ("fSqrtKx3") | |
141 | // in the X direction, perpendicular to the wires, | |
142 | // and derive the Mathieson parameters K2 ("fKx2") and K4 ("fKx4") | |
143 | // in the same direction | |
a713db22 | 144 | fMathieson->SetSqrtKx3AndDeriveKx2Kx4(SqrtKx3); |
d5bfadcc | 145 | } |
146 | ||
147 | //__________________________________________________________________________ | |
148 | void AliMUONResponseV0::SetSqrtKy3AndDeriveKy2Ky4(Float_t SqrtKy3) | |
149 | { | |
150 | // Set to "SqrtKy3" the Mathieson parameter K3 ("fSqrtKy3") | |
151 | // in the Y direction, along the wires, | |
152 | // and derive the Mathieson parameters K2 ("fKy2") and K4 ("fKy4") | |
153 | // in the same direction | |
a713db22 | 154 | fMathieson->SetSqrtKy3AndDeriveKy2Ky4(SqrtKy3); |
d5bfadcc | 155 | } |
a713db22 | 156 | //__________________________________________________________________________ |
a9e2aefa | 157 | Float_t AliMUONResponseV0::IntPH(Float_t eloss) |
158 | { | |
159 | // Calculate charge from given ionization energy loss | |
160 | Int_t nel; | |
4ac9d21e | 161 | nel= Int_t(eloss*1.e9/27.4); |
a9e2aefa | 162 | Float_t charge=0; |
163 | if (nel == 0) nel=1; | |
164 | for (Int_t i=1;i<=nel;i++) { | |
01997fa2 | 165 | Float_t arg=0.; |
166 | while(!arg) arg = gRandom->Rndm(); | |
167 | charge -= fChargeSlope*TMath::Log(arg); | |
a9e2aefa | 168 | } |
169 | return charge; | |
170 | } | |
a713db22 | 171 | |
a713db22 | 172 | //------------------------------------------- |
173 | Float_t AliMUONResponseV0::IntXY(Int_t idDE, AliMUONGeometrySegmentation* segmentation) | |
174 | { | |
175 | // Calculate charge on current pad according to Mathieson distribution | |
a9e2aefa | 176 | |
a713db22 | 177 | return fMathieson->IntXY(idDE, segmentation); |
178 | } | |
885d501b | 179 | |
180 | ||
a713db22 | 181 | //------------------------------------------- |
f7b62f08 | 182 | Int_t AliMUONResponseV0::DigitResponse(Int_t digit, AliMUONTransientDigit* /*where*/) |
a9e2aefa | 183 | { |
885d501b | 184 | // FIXME : AliFatal("put the pedestal adding here!"); |
a9e2aefa | 185 | // add white noise and do zero-suppression and signal truncation |
b64652f5 | 186 | // Float_t meanNoise = gRandom->Gaus(1, 0.2); |
187 | // correct noise for slat chambers; | |
188 | // one more field to add to AliMUONResponseV0 to allow different noises ???? | |
885d501b | 189 | // Float_t meanNoise = gRandom->Gaus(1., 0.2); |
190 | // Float_t noise = gRandom->Gaus(0., meanNoise); | |
191 | Float_t noise = gRandom->Gaus(0., 1.0); | |
104b5ac2 | 192 | digit += TMath::Nint(noise); |
ddc10e24 | 193 | if ( digit <= ZeroSuppression()) digit = 0; |
4ac9d21e | 194 | // if ( digit > MaxAdc()) digit=MaxAdc(); |
885d501b | 195 | if ( digit > Saturation()) |
196 | { | |
197 | digit=Saturation(); | |
198 | } | |
4ac9d21e | 199 | |
a9e2aefa | 200 | return digit; |
201 | } | |
202 | ||
885d501b | 203 | //_____________________________________________________________________________ |
204 | Float_t | |
205 | AliMUONResponseV0::GetAnod(Float_t x) const | |
206 | { | |
207 | // | |
208 | // Return wire coordinate closest to x. | |
209 | // | |
210 | Int_t n = Int_t(x/Pitch()); | |
211 | Float_t wire = (x>0) ? n+0.5 : n-0.5; | |
212 | return Pitch()*wire; | |
213 | } | |
a9e2aefa | 214 | |
885d501b | 215 | //______________________________________________________________________________ |
216 | void | |
217 | AliMUONResponseV0::DisIntegrate(const AliMUONHit& hit, TList& digits) | |
218 | { | |
219 | // | |
220 | // | |
221 | // | |
222 | ||
223 | digits.Clear(); | |
224 | ||
225 | Int_t detElemId = hit.DetElemId(); | |
226 | ||
227 | // | |
228 | // Width of the integration area | |
229 | // | |
230 | Double_t dx = SigmaIntegration()*ChargeSpreadX(); | |
231 | Double_t dy = SigmaIntegration()*ChargeSpreadY(); | |
232 | ||
233 | // Use that (dx,dy) to specify the area upon which | |
234 | // we will iterate to spread charge into. | |
235 | Double_t x,y,z; | |
236 | Global2Local(detElemId,hit.X(),hit.Y(),hit.Z(),x,y,z); | |
237 | x = GetAnod(x); | |
238 | TVector2 hitPosition(x,y); | |
239 | AliMpArea area(hitPosition,TVector2(dx,dy)); | |
240 | ||
241 | // | |
242 | // Get pulse height from energy loss | |
243 | Float_t qtot = IntPH(hit.Eloss()); | |
244 | ||
245 | Float_t currentCorrel = TMath::Exp(gRandom->Gaus(0.0,ChargeCorrel()/2.0)); | |
a9e2aefa | 246 | |
885d501b | 247 | AliDebug(4,Form("DE=%d eloss=%e x,y,z=%e,%e,%e fCurrentCorrel=%e dx,dy=%e,%e", |
248 | detElemId,hit.Eloss(),hit.X(),hit.Y(),hit.Z(), | |
249 | currentCorrel,dx,dy)); | |
250 | ||
251 | AliMpStationType station = AliMpDEManager::GetStationType(detElemId); | |
252 | ||
253 | Int_t intOffset = 1; | |
254 | if ( station == kStation1 || station == kStation2 ) | |
255 | { | |
256 | intOffset = 0; | |
257 | } | |
258 | ||
259 | for ( Int_t cath = 0; cath < 2; ++cath ) | |
260 | { | |
261 | Float_t qcath = qtot * ( cath == 0 ? currentCorrel : 1.0/currentCorrel); | |
262 | ||
263 | AliDebug(4,Form("i=%d qtot=%e qcath=%e",cath+1,qtot,qcath)); | |
264 | // Get an iterator to loop over pads, within the given area. | |
265 | const AliMpVSegmentation* seg = | |
266 | Segmentation()->GetMpSegmentation(detElemId,cath); | |
267 | AliMpVPadIterator* it = seg->CreateIterator(area); | |
268 | ||
269 | if (!it) | |
270 | { | |
271 | AliError(Form("Could not get iterator for detElemId %d",detElemId)); | |
272 | return; | |
273 | } | |
274 | ||
275 | // Start loop over pads. | |
276 | it->First(); | |
277 | while ( !it->IsDone() ) | |
278 | { | |
279 | AliMpPad pad = it->CurrentItem(); | |
280 | TVector2 lowerLeft(hitPosition-pad.Position()-pad.Dimensions()); | |
281 | TVector2 upperRight(lowerLeft + pad.Dimensions()*2.0); | |
282 | Float_t qp = TMath::Abs(fMathieson->IntXY(lowerLeft.X(),lowerLeft.Y(), | |
283 | upperRight.X(),upperRight.Y())); | |
a9e2aefa | 284 | |
285 | ||
885d501b | 286 | Int_t icharge = Int_t(qp*qcath); |
287 | ||
288 | if ( qp > fChargeThreshold ) | |
289 | { | |
290 | AliDebug(4,Form("ix,iy=%d,%d qp=%e", | |
291 | pad.GetIndices().GetFirst()+intOffset, | |
292 | pad.GetIndices().GetSecond()+intOffset, | |
293 | qp)); | |
294 | AliMUONDigit* d = new AliMUONDigit; | |
295 | d->SetDetElemId(detElemId); | |
296 | d->SetPadX(pad.GetIndices().GetFirst()+intOffset); | |
297 | d->SetPadY(pad.GetIndices().GetSecond()+intOffset); | |
298 | d->SetSignal(icharge); | |
299 | d->AddPhysicsSignal(d->Signal()); | |
300 | d->SetCathode(cath); | |
301 | Int_t manuId = pad.GetLocation().GetFirst(); | |
302 | Int_t manuChannel = pad.GetLocation().GetSecond(); | |
303 | AliMpPlaneType planeType = AliMpDEManager::GetPlaneType(detElemId,cath); | |
304 | if ( planeType == kNonBendingPlane ) | |
305 | { | |
306 | // FIXME: this should not be there, but integrated in the mapping files directly. | |
307 | manuId |= (1<<11); | |
308 | } | |
309 | d->SetElectronics(manuId,manuChannel); | |
310 | digits.Add(d); | |
311 | } | |
312 | it->Next(); | |
313 | } | |
314 | delete it; | |
315 | } | |
316 | } | |
a9e2aefa | 317 | |
318 | ||
319 |