Adding more bins in QA (Alis)
[u/mrichter/AliRoot.git] / MUON / AliMUONResponseV0.cxx
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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
3d1463c8 18//-----------------------------------------------------------------------------
d19b6003 19// Class AliMUONResponseV0
20// --------------------------
9265505b 21// Implementation of
22// Mathieson response
3d1463c8 23//-----------------------------------------------------------------------------
a9e2aefa 24
30178c30 25#include "AliMUONResponseV0.h"
885d501b 26#include "AliMUON.h"
27#include "AliMUONConstants.h"
28#include "AliMUONDigit.h"
885d501b 29#include "AliMUONGeometryTransformer.h"
30#include "AliMUONHit.h"
2a5f75ae 31#include "AliMUONConstants.h"
9265505b 32
885d501b 33#include "AliMpArea.h"
34#include "AliMpDEManager.h"
885d501b 35#include "AliMpVPadIterator.h"
9265505b 36#include "AliMpSegmentation.h"
885d501b 37#include "AliMpVSegmentation.h"
866c3232 38#include "AliMpCathodType.h"
9265505b 39
885d501b 40#include "AliRun.h"
9265505b 41#include "AliLog.h"
42
885d501b 43#include "Riostream.h"
44#include "TVector2.h"
45#include <TMath.h>
46#include <TRandom.h>
8c343c7c 47
cdd730d0 48using std::endl;
49using std::cout;
9265505b 50/// \cond CLASSIMP
d5bfadcc 51ClassImp(AliMUONResponseV0)
9265505b 52/// \endcond
d5bfadcc 53
885d501b 54AliMUON* muon()
55{
56 return static_cast<AliMUON*>(gAlice->GetModule("MUON"));
57}
58
59void Global2Local(Int_t detElemId, Double_t xg, Double_t yg, Double_t zg,
60 Double_t& xl, Double_t& yl, Double_t& zl)
61{
9265505b 62 /// ideally should be :
63 /// Double_t x,y,z;
64 /// AliMUONGeometry::Global2Local(detElemId,xg,yg,zg,x,y,z);
65 /// but while waiting for this geometry singleton, let's go through
66 /// AliMUON still.
885d501b 67
68 const AliMUONGeometryTransformer* transformer = muon()->GetGeometryTransformer();
69 transformer->Global2Local(detElemId,xg,yg,zg,xl,yl,zl);
70}
71
30178c30 72//__________________________________________________________________________
73AliMUONResponseV0::AliMUONResponseV0()
885d501b 74 : AliMUONResponse(),
75 fChargeSlope(0.0),
76 fChargeSpreadX(0.0),
77 fChargeSpreadY(0.0),
78 fSigmaIntegration(0.0),
79 fMaxAdc(0),
ccea41d4 80 fSaturation(0),
885d501b 81 fZeroSuppression(0),
82 fChargeCorrel(0.0),
83 fMathieson(new AliMUONMathieson),
d1bb9a6f 84 fChargeThreshold(1e-4),
85 fIsTailEffect(kFALSE)
30178c30 86{
9265505b 87 /// Normal constructor
885d501b 88 AliDebug(1,Form("Default ctor"));
30178c30 89}
f29ba3e1 90
ccea41d4 91//__________________________________________________________________________
2a7d64a9 92AliMUONResponseV0::AliMUONResponseV0(const AliMUONResponseV0& other)
93: AliMUONResponse(),
94fChargeSlope(0.0),
95fChargeSpreadX(0.0),
96fChargeSpreadY(0.0),
97fSigmaIntegration(0.0),
98fMaxAdc(0),
99fSaturation(0),
100fZeroSuppression(0),
101fChargeCorrel(0.0),
102fMathieson(0),
d1bb9a6f 103fChargeThreshold(1e-4),
104fIsTailEffect(kFALSE)
2a7d64a9 105{
106 /// copy ctor
107 other.CopyTo(*this);
108}
109
110//__________________________________________________________________________
111AliMUONResponseV0&
112AliMUONResponseV0::operator=(const AliMUONResponseV0& other)
113{
114 /// Assignment operator
115 other.CopyTo(*this);
116 return *this;
117}
118
119//__________________________________________________________________________
a713db22 120AliMUONResponseV0::~AliMUONResponseV0()
121{
9265505b 122/// Destructor
123
885d501b 124 AliDebug(1,"");
a713db22 125 delete fMathieson;
126}
f29ba3e1 127
885d501b 128//______________________________________________________________________________
129void
2a7d64a9 130AliMUONResponseV0::CopyTo(AliMUONResponseV0& other) const
131{
132 /// Copy *this to other
133 other.fChargeSlope=fChargeSlope;
134 other.fChargeSpreadX=fChargeSpreadX;
135 other.fChargeSpreadY=fChargeSpreadY;
136 other.fSigmaIntegration=fSigmaIntegration;
137 other.fMaxAdc=fMaxAdc;
138 other.fSaturation=fSaturation;
139 other.fZeroSuppression=fZeroSuppression;
140 other.fChargeCorrel=fChargeCorrel;
141 delete other.fMathieson;
142 other.fMathieson = new AliMUONMathieson(*fMathieson);
143 other.fChargeThreshold=fChargeThreshold;
144}
145
146//______________________________________________________________________________
147void
885d501b 148AliMUONResponseV0::Print(Option_t*) const
149{
9265505b 150/// Printing
d19b6003 151
885d501b 152 cout << " ChargeSlope=" << fChargeSlope
153 << " ChargeSpreadX,Y=" << fChargeSpreadX
154 << fChargeSpreadY
155 << " ChargeCorrelation=" << fChargeCorrel
156 << endl;
885d501b 157}
158
d5bfadcc 159 //__________________________________________________________________________
160void AliMUONResponseV0::SetSqrtKx3AndDeriveKx2Kx4(Float_t SqrtKx3)
161{
9265505b 162 /// Set to "SqrtKx3" the Mathieson parameter K3 ("fSqrtKx3")
163 /// in the X direction, perpendicular to the wires,
164 /// and derive the Mathieson parameters K2 ("fKx2") and K4 ("fKx4")
165 /// in the same direction
a713db22 166 fMathieson->SetSqrtKx3AndDeriveKx2Kx4(SqrtKx3);
d5bfadcc 167}
168
169 //__________________________________________________________________________
170void AliMUONResponseV0::SetSqrtKy3AndDeriveKy2Ky4(Float_t SqrtKy3)
171{
9265505b 172 /// Set to "SqrtKy3" the Mathieson parameter K3 ("fSqrtKy3")
173 /// in the Y direction, along the wires,
174 /// and derive the Mathieson parameters K2 ("fKy2") and K4 ("fKy4")
175 /// in the same direction
a713db22 176 fMathieson->SetSqrtKy3AndDeriveKy2Ky4(SqrtKy3);
d5bfadcc 177}
a713db22 178 //__________________________________________________________________________
85fec35d 179Float_t AliMUONResponseV0::IntPH(Float_t eloss) const
a9e2aefa 180{
9265505b 181 /// Calculate charge from given ionization energy loss
a9e2aefa 182 Int_t nel;
4ac9d21e 183 nel= Int_t(eloss*1.e9/27.4);
a9e2aefa 184 Float_t charge=0;
185 if (nel == 0) nel=1;
186 for (Int_t i=1;i<=nel;i++) {
01997fa2 187 Float_t arg=0.;
188 while(!arg) arg = gRandom->Rndm();
189 charge -= fChargeSlope*TMath::Log(arg);
a9e2aefa 190 }
191 return charge;
192}
a713db22 193
885d501b 194//_____________________________________________________________________________
195Float_t
196AliMUONResponseV0::GetAnod(Float_t x) const
197{
9265505b 198 /// Return wire coordinate closest to x.
199
885d501b 200 Int_t n = Int_t(x/Pitch());
201 Float_t wire = (x>0) ? n+0.5 : n-0.5;
202 return Pitch()*wire;
203}
a9e2aefa 204
885d501b 205//______________________________________________________________________________
206void
2a5f75ae 207AliMUONResponseV0::DisIntegrate(const AliMUONHit& hit, TList& digits, Float_t timeDif)
885d501b 208{
9265505b 209 /// Go from 1 hit to a list of digits.
210 /// The energy deposition of that hit is first converted into charge
211 /// (in IntPH() method), and then this charge is dispatched on several
212 /// pads, according to the Mathieson distribution.
885d501b 213
214 digits.Clear();
215
216 Int_t detElemId = hit.DetElemId();
d1bb9a6f 217 Double_t hitX = hit.X() ;
218 Double_t hitY = hit.Y() ;
219 Double_t hitZ = hit.Z() ;
220
885d501b 221 // Width of the integration area
885d501b 222 Double_t dx = SigmaIntegration()*ChargeSpreadX();
223 Double_t dy = SigmaIntegration()*ChargeSpreadY();
224
d1bb9a6f 225 //Modify to take the tailing effect.
226 if(fIsTailEffect){
227 Double_t locX,locY,locZ,globXCenter,globYCenter,globZ;
5fe36481 228 Int_t para = 5; // This parameter is a natural number(excluding zero), higher the value less is the tailing effect
d1bb9a6f 229 Double_t termA = 1.0;
230 Double_t termB = 1.0;
231 if(para>0){
232 for ( Int_t cath = AliMp::kCath0; cath <= AliMp::kCath1; ++cath )
233 {
234 // Get an iterator to loop over pads, within the given area.
235 const AliMpVSegmentation* seg =
236 AliMpSegmentation::Instance()
237 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cath));
238 AliMp::PlaneType plane = seg->PlaneType();
239
240 if(plane == AliMp::kBendingPlane) {
241 Global2Local(detElemId,hitX,hitY,hitZ,locX,locY,locZ);
6e97fbb8 242 AliMpPad pad = seg->PadByPosition(locX,locY,kFALSE);
5fe36481 243 if(pad.IsValid()){
6e97fbb8 244 Double_t locYCenter = pad.GetPositionY();
245 Double_t locXCenter = pad.GetPositionX();
5fe36481 246 const AliMUONGeometryTransformer* transformer = muon()->GetGeometryTransformer();
247 transformer->Local2Global(detElemId,locXCenter,locYCenter,locZ,globXCenter,globYCenter,globZ);
248 for(Int_t itime = 0; itime<para; itime++)
249 termA *= 10.0;
250
251 for(Int_t itime = 0; itime<Int_t((2*para) + 1); itime++)
252 termB *= (hitY - globYCenter) ;
253
254 hitY = hitY + termA*termB;
255 }// if the pad is a valid one
d1bb9a6f 256 }// if bending plane
257 }// cathode loop
258 }// if para > 0 condn
259 }// if tail effect
260
885d501b 261 // Use that (dx,dy) to specify the area upon which
262 // we will iterate to spread charge into.
263 Double_t x,y,z;
d1bb9a6f 264 Global2Local(detElemId,hitX,hitY,hitZ,x,y,z);
885d501b 265 x = GetAnod(x);
6e97fbb8 266 AliMpArea area(x,y,dx,dy);
885d501b 267
32c9ead9 268 // Get pulse height from energy loss.
885d501b 269 Float_t qtot = IntPH(hit.Eloss());
270
2a5f75ae 271 // If from a pileup event we apply a reduction factor to the charge
272 if (timeDif!=0){
273 qtot = AliMUONConstants::ReducedQTot(qtot,timeDif);
274 }
275
05315e71 276 // Scale the charge to it'll (roughly) be in fC
277 qtot *= AliMUONConstants::DefaultADC2MV()*AliMUONConstants::DefaultA0()*AliMUONConstants::DefaultCapa();
278
32c9ead9 279 // Get the charge correlation between cathodes.
885d501b 280 Float_t currentCorrel = TMath::Exp(gRandom->Gaus(0.0,ChargeCorrel()/2.0));
a9e2aefa 281
866c3232 282 for ( Int_t cath = AliMp::kCath0; cath <= AliMp::kCath1; ++cath )
885d501b 283 {
284 Float_t qcath = qtot * ( cath == 0 ? currentCorrel : 1.0/currentCorrel);
285
885d501b 286 // Get an iterator to loop over pads, within the given area.
32c9ead9 287 const AliMpVSegmentation* seg =
866c3232 288 AliMpSegmentation::Instance()
289 ->GetMpSegmentation(detElemId,AliMp::GetCathodType(cath));
885d501b 290
32c9ead9 291 AliMpVPadIterator* it = seg->CreateIterator(area);
292
293 if (!it)
294 {
295 AliError(Form("Could not get iterator for detElemId %d",detElemId));
296 return;
297 }
298
299 // Start loop over pads.
300 it->First();
301
302 if ( it->IsDone() )
303 {
304 // Exceptional case : iterator is built, but is invalid from the start.
6e97fbb8 305 AliMpPad pad = seg->PadByPosition(area.GetPositionX(),area.GetPositionY(),
306 kFALSE);
32c9ead9 307 if ( pad.IsValid() )
885d501b 308 {
ae7445c5 309 AliDebug(1, Form("Got an invalid iterator bug (area.Position() is within "
32c9ead9 310 " DE but the iterator is void) for detElemId %d cath %d",
311 detElemId,cath));
885d501b 312 }
32c9ead9 313 else
885d501b 314 {
ae7445c5 315 AliDebug(1, Form("Got an invalid iterator bug for detElemId %d cath %d."
32c9ead9 316 "Might be a bad hit ? area.Position()=(%e,%e) "
317 "Dimensions()=(%e,%e)",
6e97fbb8 318 detElemId,cath,area.GetPositionX(),area.GetPositionY(),
319 area.GetDimensionX(),area.GetDimensionY()));
885d501b 320 }
321 delete it;
32c9ead9 322 return;
323 }
324
325 while ( !it->IsDone() )
326 {
327 // For each pad given by the iterator, compute the charge of that
328 // pad, according to the Mathieson distribution.
329 AliMpPad pad = it->CurrentItem();
6e97fbb8 330 TVector2 lowerLeft(TVector2(x,y)-TVector2(pad.GetPositionX(),pad.GetPositionY())-
331 TVector2(pad.GetDimensionX(),pad.GetDimensionY()));
332 TVector2 upperRight(lowerLeft + TVector2(pad.GetDimensionX(),pad.GetDimensionY())*2.0);
32c9ead9 333 Float_t qp = TMath::Abs(fMathieson->IntXY(lowerLeft.X(),lowerLeft.Y(),
334 upperRight.X(),upperRight.Y()));
335
05315e71 336 if ( qp > fChargeThreshold &&
337 qp*qcath > AliMUONConstants::DefaultADC2MV()*AliMUONConstants::DefaultA0()*AliMUONConstants::DefaultCapa() )
32c9ead9 338 {
339 // If we're above threshold, then we create a digit,
340 // and fill it with relevant information, including electronics.
05315e71 341
342 // note that the second condition above is to be backward compatible (when
343 // the sdigitizer was making a cut on Int_t(qp*qcath) > 0 and qcath was in ADC, not in fC)
344
168e9c4d 345 AliMUONDigit* d = new AliMUONDigit(detElemId,pad.GetManuId(),
346 pad.GetManuChannel(),cath);
347 d->SetPadXY(pad.GetIx(),pad.GetIy());
05315e71 348 d->SetCharge(qp*qcath);
32c9ead9 349 digits.Add(d);
350 }
351 it->Next();
352 }
353 delete it;
885d501b 354 }
355}
a9e2aefa 356
357
358