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