TRD/AliTRDclusterizerV1.cxx

   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
  16 /*
  17 $Log$
  18 Revision 1.15.6.2  2002/07/24 10:09:30  alibrary
  19 Updating VirtualMC
  20
  21 Revision 1.17  2002/06/12 09:54:35  cblume
  22 Update of tracking code provided by Sergei
  23
  24 Revision 1.16  2002/03/25 20:01:30  cblume
  25 Introduce parameter class
  26
  27 Revision 1.15  2001/11/14 12:09:11  cblume
  28 Use correct name for digitizer
  29
  30 Revision 1.14  2001/11/14 10:50:45  cblume
  31 Changes in digits IO. Add merging of summable digits
  32
  33 Revision 1.13  2001/05/28 17:07:58  hristov
  34 Last minute changes; ExB correction in AliTRDclusterizerV1; taking into account of material in G10 TEC frames and material between TEC planes (C.Blume,S.Sedykh)
  35
  36 Revision 1.12  2001/05/21 17:42:58  hristov
  37 Constant casted to avoid the ambiguity
  38
  39 Revision 1.11  2001/05/21 16:45:47  hristov
  40 Last minute changes (C.Blume)
  41
  42 Revision 1.10  2001/05/07 08:06:44  cblume
  43 Speedup of the code. Create only AliTRDcluster
  44
  45 Revision 1.9  2000/11/01 14:53:20  cblume
  46 Merge with TRD-develop
  47
  48 Revision 1.1.4.5  2000/10/15 23:40:01  cblume
  49 Remove AliTRDconst
  50
  51 Revision 1.1.4.4  2000/10/06 16:49:46  cblume
  52 Made Getters const
  53
  54 Revision 1.1.4.3  2000/10/04 16:34:58  cblume
  55 Replace include files by forward declarations
  56
  57 Revision 1.1.4.2  2000/09/22 14:49:49  cblume
  58 Adapted to tracking code
  59
  60 Revision 1.8  2000/10/02 21:28:19  fca
  61 Removal of useless dependecies via forward declarations
  62
  63 Revision 1.7  2000/06/27 13:08:50  cblume
  64 Changed to Copy(TObject &A) to appease the HP-compiler
  65
  66 Revision 1.6  2000/06/09 11:10:07  cblume
  67 Compiler warnings and coding conventions, next round
  68
  69 Revision 1.5  2000/06/08 18:32:58  cblume
  70 Make code compliant to coding conventions
  71
  72 Revision 1.4  2000/06/07 16:27:01  cblume
  73 Try to remove compiler warnings on Sun and HP
  74
  75 Revision 1.3  2000/05/08 16:17:27  cblume
  76 Merge TRD-develop
  77
  78 Revision 1.1.4.1  2000/05/08 15:09:01  cblume
  79 Introduce AliTRDdigitsManager
  80
  81 Revision 1.1  2000/02/28 18:58:54  cblume
  82 Add new TRD classes
  83
  84 */
  85
  86 ///////////////////////////////////////////////////////////////////////////////
  87 //                                                                           //
  88 // TRD cluster finder for the slow simulator.
  89 //                                                                           //
  90 ///////////////////////////////////////////////////////////////////////////////
  91
  92 #include <TF1.h>
  93 #include <TTree.h>
  94 #include <TH1.h>
  95 #include <TFile.h>
  96
  97 #include "AliRun.h"
  98
  99 #include "AliTRD.h"
 100 #include "AliTRDclusterizerV1.h"
 101 #include "AliTRDmatrix.h"
 102 #include "AliTRDgeometry.h"
 103 #include "AliTRDdigitizer.h"
 104 #include "AliTRDdataArrayF.h"
 105 #include "AliTRDdataArrayI.h"
 106 #include "AliTRDdigitsManager.h"
 107 #include "AliTRDparameter.h"
 108
 109 ClassImp(AliTRDclusterizerV1)
 110
 111 //_____________________________________________________________________________
 112 AliTRDclusterizerV1::AliTRDclusterizerV1():AliTRDclusterizer()
 113 {
 114   //
 115   // AliTRDclusterizerV1 default constructor
 116   //
 117
 118   fDigitsManager = 0;
 119
 120 }
 121
 122 //_____________________________________________________________________________
 123 AliTRDclusterizerV1::AliTRDclusterizerV1(const Text_t* name, const Text_t* title)
 124                     :AliTRDclusterizer(name,title)
 125 {
 126   //
 127   // AliTRDclusterizerV1 default constructor
 128   //
 129
 130   fDigitsManager = new AliTRDdigitsManager();
 131   fDigitsManager->CreateArrays();
 132
 133 }
 134
 135 //_____________________________________________________________________________
 136 AliTRDclusterizerV1::AliTRDclusterizerV1(const AliTRDclusterizerV1 &c)
 137 {
 138   //
 139   // AliTRDclusterizerV1 copy constructor
 140   //
 141
 142   ((AliTRDclusterizerV1 &) c).Copy(*this);
 143
 144 }
 145
 146 //_____________________________________________________________________________
 147 AliTRDclusterizerV1::~AliTRDclusterizerV1()
 148 {
 149   //
 150   // AliTRDclusterizerV1 destructor
 151   //
 152
 153   if (fDigitsManager) {
 154     delete fDigitsManager;
 155     fDigitsManager = NULL;
 156   }
 157
 158 }
 159
 160 //_____________________________________________________________________________
 161 AliTRDclusterizerV1 &AliTRDclusterizerV1::operator=(const AliTRDclusterizerV1 &c)
 162 {
 163   //
 164   // Assignment operator
 165   //
 166
 167   if (this != &c) ((AliTRDclusterizerV1 &) c).Copy(*this);
 168   return *this;
 169
 170 }
 171
 172 //_____________________________________________________________________________
 173 void AliTRDclusterizerV1::Copy(TObject &c)
 174 {
 175   //
 176   // Copy function
 177   //
 178
 179   ((AliTRDclusterizerV1 &) c).fDigitsManager = 0;
 180
 181   AliTRDclusterizer::Copy(c);
 182
 183 }
 184
 185 //_____________________________________________________________________________
 186 Bool_t AliTRDclusterizerV1::ReadDigits()
 187 {
 188   //
 189   // Reads the digits arrays from the input aliroot file
 190   //
 191
 192   if (!fInputFile) {
 193     printf("<AliTRDclusterizerV1::ReadDigits> ");
 194     printf("No input file open\n");
 195     return kFALSE;
 196   }
 197
 198   fDigitsManager->Open(fInputFile->GetName());
 199
 200   // Read in the digit arrays
 201   return (fDigitsManager->ReadDigits());
 202
 203 }
 204
 205 //_____________________________________________________________________________
 206 Bool_t AliTRDclusterizerV1::MakeClusters()
 207 {
 208   //
 209   // Generates the cluster.
 210   //
 211
 212   Int_t row, col, time;
 213
 214   if (fTRD->IsVersion() != 1) {
 215     printf("<AliTRDclusterizerV1::MakeCluster> ");
 216     printf("TRD must be version 1 (slow simulator).\n");
 217     return kFALSE;
 218   }
 219
 220   // Get the geometry
 221   AliTRDgeometry *geo = fTRD->GetGeometry();
 222
 223   // Create a default parameter class if none is defined
 224   if (!fPar) {
 225     fPar = new AliTRDparameter("TRDparameter","Standard TRD parameter");
 226     printf("<AliTRDclusterizerV1::MakeCluster> ");
 227     printf("Create the default parameter object.\n");
 228   }
 229
 230   Float_t timeBinSize = fPar->GetTimeBinSize();
 231   // Half of ampl.region
 232   const Float_t kAmWidth = AliTRDgeometry::AmThick()/2.;
 233
 234   Float_t omegaTau = fPar->GetOmegaTau();
 235   if (fVerbose > 0) {
 236     printf("<AliTRDclusterizerV1::MakeCluster> ");
 237     printf("OmegaTau = %f \n",omegaTau);
 238     printf("<AliTRDclusterizerV1::MakeCluster> ");
 239     printf("Start creating clusters.\n");
 240   }
 241
 242   AliTRDdataArrayI *digits;
 243   AliTRDdataArrayI *track0;
 244   AliTRDdataArrayI *track1;
 245   AliTRDdataArrayI *track2;
 246
 247   // Threshold value for the maximum
 248   Int_t maxThresh = fPar->GetClusMaxThresh();
 249   // Threshold value for the digit signal
 250   Int_t sigThresh = fPar->GetClusSigThresh();
 251
 252   // Iteration limit for unfolding procedure
 253   const Float_t kEpsilon = 0.01;
 254
 255   const Int_t   kNclus   = 3;
 256   const Int_t   kNsig    = 5;
 257   const Int_t   kNtrack  = 3 * kNclus;
 258
 259   Int_t   iType          = 0;
 260   Int_t   iUnfold        = 0;
 261
 262   Float_t ratioLeft      = 1.0;
 263   Float_t ratioRight     = 1.0;
 264
 265   Float_t padSignal[kNsig];
 266   Float_t clusterSignal[kNclus];
 267   Float_t clusterPads[kNclus];
 268   Int_t   clusterDigit[kNclus];
 269   Int_t   clusterTracks[kNtrack];
 270
 271   Int_t chamBeg = 0;
 272   Int_t chamEnd = AliTRDgeometry::Ncham();
 273   if (fTRD->GetSensChamber()  >= 0) {
 274     chamBeg = fTRD->GetSensChamber();
 275     chamEnd = chamBeg + 1;
 276   }
 277   Int_t planBeg = 0;
 278   Int_t planEnd = AliTRDgeometry::Nplan();
 279   if (fTRD->GetSensPlane()    >= 0) {
 280     planBeg = fTRD->GetSensPlane();
 281     planEnd = planBeg + 1;
 282   }
 283   Int_t sectBeg = 0;
 284   Int_t sectEnd = AliTRDgeometry::Nsect();
 285
 286   // Start clustering in every chamber
 287   for (Int_t icham = chamBeg; icham < chamEnd; icham++) {
 288     for (Int_t iplan = planBeg; iplan < planEnd; iplan++) {
 289       for (Int_t isect = sectBeg; isect < sectEnd; isect++) {
 290
 291         if (fTRD->GetSensSector() >= 0) {
 292           Int_t sens1 = fTRD->GetSensSector();
 293           Int_t sens2 = sens1 + fTRD->GetSensSectorRange();
 294           sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect()))
 295                  * AliTRDgeometry::Nsect();
 296           if (sens1 < sens2) {
 297             if ((isect < sens1) || (isect >= sens2)) continue;
 298           }
 299           else {
 300             if ((isect < sens1) && (isect >= sens2)) continue;
 301           }
 302         }
 303
 304         Int_t idet = geo->GetDetector(iplan,icham,isect);
 305
 306         Int_t nClusters      = 0;
 307         Int_t nClusters2pad  = 0;
 308         Int_t nClusters3pad  = 0;
 309         Int_t nClusters4pad  = 0;
 310         Int_t nClusters5pad  = 0;
 311         Int_t nClustersLarge = 0;
 312
 313         if (fVerbose > 0) {
 314           printf("<AliTRDclusterizerV1::MakeCluster> ");
 315           printf("Analyzing chamber %d, plane %d, sector %d.\n"
 316                 ,icham,iplan,isect);
 317         }
 318
 319         Int_t   nRowMax     = fPar->GetRowMax(iplan,icham,isect);
 320         Int_t   nColMax     = fPar->GetColMax(iplan);
 321         Int_t   nTimeBefore = fPar->GetTimeBefore();
 322         Int_t   nTimeTotal  = fPar->GetTimeTotal();
 323
 324         Float_t row0        = fPar->GetRow0(iplan,icham,isect);
 325         Float_t col0        = fPar->GetCol0(iplan);
 326         Float_t rowSize     = fPar->GetRowPadSize(iplan,icham,isect);
 327         Float_t colSize     = fPar->GetColPadSize(iplan);
 328
 329         // Get the digits
 330         digits = fDigitsManager->GetDigits(idet);
 331         digits->Expand();
 332         track0 = fDigitsManager->GetDictionary(idet,0);
 333         track0->Expand();
 334         track1 = fDigitsManager->GetDictionary(idet,1);
 335         track1->Expand();
 336         track2 = fDigitsManager->GetDictionary(idet,2);
 337         track2->Expand();
 338
 339         // Loop through the chamber and find the maxima
 340         for ( row = 0;  row <  nRowMax;    row++) {
 341           for ( col = 2;  col <  nColMax;    col++) {
 342             for (time = 0; time < nTimeTotal; time++) {
 343
 344               Int_t signalL = TMath::Abs(digits->GetDataUnchecked(row,col  ,time));
 345               Int_t signalM = TMath::Abs(digits->GetDataUnchecked(row,col-1,time));
 346               Int_t signalR = TMath::Abs(digits->GetDataUnchecked(row,col-2,time));
 347
 348               // Look for the maximum
 349               if (signalM >= maxThresh) {
 350                 if (((signalL >= sigThresh) &&
 351                      (signalL <  signalM))  ||
 352                     ((signalR >= sigThresh) &&
 353                      (signalR <  signalM))) {
 354                   // Maximum found, mark the position by a negative signal
 355                   digits->SetDataUnchecked(row,col-1,time,-signalM);
 356                 }
 357               }
 358
 359             }
 360           }
 361         }
 362
 363         // Now check the maxima and calculate the cluster position
 364         for ( row = 0;  row <  nRowMax  ;  row++) {
 365           for (time = 0; time < nTimeTotal; time++) {
 366             for ( col = 1;  col <  nColMax-1;  col++) {
 367
 368               // Maximum found ?
 369               if (digits->GetDataUnchecked(row,col,time) < 0) {
 370
 371                 Int_t iPad;
 372                 for (iPad = 0; iPad < kNclus; iPad++) {
 373                   Int_t iPadCol = col - 1 + iPad;
 374                   clusterSignal[iPad]     = TMath::Abs(digits->GetDataUnchecked(row
 375                                                                                ,iPadCol
 376                                                                                ,time));
 377                   clusterDigit[iPad]      = digits->GetIndexUnchecked(row,iPadCol,time);
 378                   clusterTracks[3*iPad  ] = track0->GetDataUnchecked(row,iPadCol,time) - 1;
 379                   clusterTracks[3*iPad+1] = track1->GetDataUnchecked(row,iPadCol,time) - 1;
 380                   clusterTracks[3*iPad+2] = track2->GetDataUnchecked(row,iPadCol,time) - 1;
 381                 }
 382
 383                 // Count the number of pads in the cluster
 384                 Int_t nPadCount = 0;
 385                 Int_t ii        = 0;
 386                 while (TMath::Abs(digits->GetDataUnchecked(row,col-ii  ,time))
 387                                                                   >= sigThresh) {
 388                   nPadCount++;
 389                   ii++;
 390                   if (col-ii   <        0) break;
 391                 }
 392                 ii = 0;
 393                 while (TMath::Abs(digits->GetDataUnchecked(row,col+ii+1,time))
 394                                                                   >= sigThresh) {
 395                   nPadCount++;
 396                   ii++;
 397                   if (col+ii+1 >= nColMax) break;
 398                 }
 399
 400                 nClusters++;
 401                 switch (nPadCount) {
 402                 case 2:
 403                   iType = 0;
 404                   nClusters2pad++;
 405                   break;
 406                 case 3:
 407                   iType = 1;
 408                   nClusters3pad++;
 409                   break;
 410                 case 4:
 411                   iType = 2;
 412                   nClusters4pad++;
 413                   break;
 414                 case 5:
 415                   iType = 3;
 416                   nClusters5pad++;
 417                   break;
 418                 default:
 419                   iType = 4;
 420                   nClustersLarge++;
 421                   break;
 422                 };
 423
 424                 // Don't analyze large clusters
 425                 //if (iType == 4) continue;
 426
 427                 // Look for 5 pad cluster with minimum in the middle
 428                 Bool_t fivePadCluster = kFALSE;
 429                 if (col < nColMax-3) {
 430                   if (digits->GetDataUnchecked(row,col+2,time) < 0) {
 431                     fivePadCluster = kTRUE;
 432                   }
 433                   if ((fivePadCluster) && (col < nColMax-5)) {
 434                     if (digits->GetDataUnchecked(row,col+4,time) >= sigThresh) {
 435                       fivePadCluster = kFALSE;
 436                     }
 437                   }
 438                   if ((fivePadCluster) && (col >         1)) {
 439                     if (digits->GetDataUnchecked(row,col-2,time) >= sigThresh) {
 440                       fivePadCluster = kFALSE;
 441                     }
 442                   }
 443                 }
 444
 445                 // 5 pad cluster
 446                 // Modify the signal of the overlapping pad for the left part
 447                 // of the cluster which remains from a previous unfolding
 448                 if (iUnfold) {
 449                   clusterSignal[0] *= ratioLeft;
 450                   iType   = 3;
 451                   iUnfold = 0;
 452                 }
 453
 454                 // Unfold the 5 pad cluster
 455                 if (fivePadCluster) {
 456                   for (iPad = 0; iPad < kNsig; iPad++) {
 457                     padSignal[iPad] = TMath::Abs(digits->GetDataUnchecked(row
 458                                                                          ,col-1+iPad
 459                                                                          ,time));
 460                   }
 461                   // Unfold the two maxima and set the signal on
 462                   // the overlapping pad to the ratio
 463                   ratioRight        = Unfold(kEpsilon,iplan,padSignal);
 464                   ratioLeft         = 1.0 - ratioRight;
 465                   clusterSignal[2] *= ratioRight;
 466                   iType   = 3;
 467                   iUnfold = 1;
 468                 }
 469
 470                 Float_t clusterCharge = clusterSignal[0]
 471                                       + clusterSignal[1]
 472                                       + clusterSignal[2];
 473
 474                 // The position of the cluster
 475                 clusterPads[0] = row + 0.5;
 476                 // Take the shift of the additional time bins into account
 477                 clusterPads[2] = time - nTimeBefore + 0.5;
 478
 479                 if (fPar->LUTOn()) {
 480
 481                   // Calculate the position of the cluster by using the
 482                   // lookup table method
 483                   clusterPads[1] = col + 0.5
 484                                  + fPar->LUTposition(iplan,clusterSignal[0]
 485                                                           ,clusterSignal[1]
 486                                                           ,clusterSignal[2]);
 487
 488                 }
 489                 else {
 490
 491                   // Calculate the position of the cluster by using the
 492                   // center of gravity method
 493                   clusterPads[1] = col + 0.5
 494                                  + (clusterSignal[2] - clusterSignal[0])
 495                                  / clusterCharge;
 496
 497                 }
 498
 499                 Float_t q0 = clusterSignal[0];
 500                 Float_t q1 = clusterSignal[1];
 501                 Float_t q2 = clusterSignal[2];
 502                 Float_t clusterSigmaY2 = (q1*(q0+q2)+4*q0*q2) /
 503                                          (clusterCharge*clusterCharge);
 504
 505                 // Correct for ExB displacement
 506                 if (fPar->ExBOn()) {
 507                   Int_t   local_time_bin = (Int_t) clusterPads[2];
 508                   Float_t driftLength    = local_time_bin * timeBinSize + kAmWidth;
 509                   Float_t colSize        = fPar->GetColPadSize(iplan);
 510                   Float_t deltaY         = omegaTau*driftLength/colSize;
 511                   clusterPads[1]         = clusterPads[1] - deltaY;
 512                 }
 513
 514                 if (fVerbose > 1) {
 515                   printf("-----------------------------------------------------------\n");
 516                   printf("Create cluster no. %d\n",nClusters);
 517                   printf("Position: row = %f, col = %f, time = %f\n",clusterPads[0]
 518                                                                     ,clusterPads[1]
 519                                                                     ,clusterPads[2]);
 520                   printf("Indices: %d, %d, %d\n",clusterDigit[0]
 521                                                 ,clusterDigit[1]
 522                                                 ,clusterDigit[2]);
 523                   printf("Total charge = %f\n",clusterCharge);
 524                   printf("Tracks: pad0 %d, %d, %d\n",clusterTracks[0]
 525                                                     ,clusterTracks[1]
 526                                                     ,clusterTracks[2]);
 527                   printf("        pad1 %d, %d, %d\n",clusterTracks[3]
 528                                                     ,clusterTracks[4]
 529                                                     ,clusterTracks[5]);
 530                   printf("        pad2 %d, %d, %d\n",clusterTracks[6]
 531                                                     ,clusterTracks[7]
 532                                                     ,clusterTracks[8]);
 533                   printf("Type = %d, Number of pads = %d\n",iType,nPadCount);
 534                 }
 535
 536                 // Calculate the position and the error
 537                 Float_t clusterPos[3];
 538                 clusterPos[0] = clusterPads[1] * colSize + col0;
 539                 clusterPos[1] = clusterPads[0] * rowSize + row0;
 540                 clusterPos[2] = clusterPads[2];
 541                 Float_t clusterSig[2];
 542                 clusterSig[0] = (clusterSigmaY2 + 1./12.) * colSize*colSize;
 543                 clusterSig[1] = rowSize * rowSize / 12.;
 544
 545                 // Add the cluster to the output array
 546                 fTRD->AddCluster(clusterPos
 547                                 ,idet
 548                                 ,clusterCharge
 549                                 ,clusterTracks
 550                                 ,clusterSig
 551                                 ,iType);
 552
 553               }
 554             }
 555           }
 556         }
 557
 558         // Compress the arrays
 559         digits->Compress(1,0);
 560         track0->Compress(1,0);
 561         track1->Compress(1,0);
 562         track2->Compress(1,0);
 563
 564         // Write the cluster and reset the array
 565         WriteClusters(idet);
 566         fTRD->ResetRecPoints();
 567
 568         if (fVerbose > 0) {
 569           printf("<AliTRDclusterizerV1::MakeCluster> ");
 570           printf("Found %d clusters in total.\n"
 571                 ,nClusters);
 572           printf("                                    2pad:  %d\n",nClusters2pad);
 573           printf("                                    3pad:  %d\n",nClusters3pad);
 574           printf("                                    4pad:  %d\n",nClusters4pad);
 575           printf("                                    5pad:  %d\n",nClusters5pad);
 576           printf("                                    Large: %d\n",nClustersLarge);
 577         }
 578
 579       }
 580     }
 581   }
 582
 583   if (fVerbose > 0) {
 584     printf("<AliTRDclusterizerV1::MakeCluster> ");
 585     printf("Done.\n");
 586   }
 587
 588   return kTRUE;
 589
 590 }
 591
 592 //_____________________________________________________________________________
 593 Float_t AliTRDclusterizerV1::Unfold(Float_t eps, Int_t plane, Float_t* padSignal)
 594 {
 595   //
 596   // Method to unfold neighbouring maxima.
 597   // The charge ratio on the overlapping pad is calculated
 598   // until there is no more change within the range given by eps.
 599   // The resulting ratio is then returned to the calling method.
 600   //
 601
 602   Int_t   irc               = 0;
 603   Int_t   itStep            = 0;      // Count iteration steps
 604
 605   Float_t ratio             = 0.5;    // Start value for ratio
 606   Float_t prevRatio         = 0;      // Store previous ratio
 607
 608   Float_t newLeftSignal[3]  = {0};    // Array to store left cluster signal
 609   Float_t newRightSignal[3] = {0};    // Array to store right cluster signal
 610   Float_t newSignal[3]      = {0};
 611
 612   // Start the iteration
 613   while ((TMath::Abs(prevRatio - ratio) > eps) && (itStep < 10)) {
 614
 615     itStep++;
 616     prevRatio = ratio;
 617
 618     // Cluster position according to charge ratio
 619     Float_t maxLeft  = (ratio*padSignal[2] - padSignal[0])
 620                      / (padSignal[0] + padSignal[1] + ratio*padSignal[2]);
 621     Float_t maxRight = (padSignal[4] - (1-ratio)*padSignal[2])
 622                      / ((1-ratio)*padSignal[2] + padSignal[3] + padSignal[4]);
 623
 624     // Set cluster charge ratio
 625     irc = fPar->PadResponse(1.0,maxLeft ,plane,newSignal);
 626     Float_t ampLeft  = padSignal[1] / newSignal[1];
 627     irc = fPar->PadResponse(1.0,maxRight,plane,newSignal);
 628     Float_t ampRight = padSignal[3] / newSignal[1];
 629
 630     // Apply pad response to parameters
 631     irc = fPar->PadResponse(ampLeft ,maxLeft ,plane,newLeftSignal );
 632     irc = fPar->PadResponse(ampRight,maxRight,plane,newRightSignal);
 633
 634     // Calculate new overlapping ratio
 635     ratio = TMath::Min((Float_t)1.0,newLeftSignal[2] /
 636                           (newLeftSignal[2] + newRightSignal[0]));
 637
 638   }
 639
 640   return ratio;
 641
 642 }
 643