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35 f9daq 1
#include "TROOT.h"
2
#include "TFile.h"
3
#include "TBenchmark.h"
4
#include "TH1F.h"
5
#include "TH2F.h"
6
#include "TH3F.h"
7
#include "TCanvas.h"
8
#include "TStyle.h"
9
#include "TPad.h"
10
#include "TF1.h"
11
#include "TGraph.h"
12
#include "TSpectrum.h"
13
#include "stdio.h"
38 f9daq 14
#include "THStack.h"
35 f9daq 15
 
16
#include "include/RTUtil.h"
17
 
18
double getNoise(TH2F*, int, int);
19
 
36 f9daq 20
int biasScan(char filename[256] = "test", char plopt[256]="th", int chXstart=0, int chXend=7, int chYstart=0, int chYend=7, bool debug = false)
35 f9daq 21
{
22
  const int c_nChannels = 64;
23
  const double c_xOffset = 1; // mm
24
  const double c_yOffset = 0.7;
25
 
26
  int map[8][8]={{32,34,53,55,40,42,61,63},
27
                 {48,50,37,39,56,58,45,47},
28
                 {33,35,52,54,41,43,60,62},
29
                 {49,51,36,38,57,59,44,46},
30
                 {17,19,4,6,25,27,12,14},
31
                 {1,3,20,22,9,11,28,30},
32
                 {16,18,5,7,24,26,13,15},
33
                 {0,2,21,23,8,10,29,31}
34
                };
35
 
38 f9daq 36
  // Set draw style
35 f9daq 37
  RTSetStyle(gStyle);
38
 
39
  // open the file with histograms
40
  char fnameroot[256];
41
  TFile* rootfile;
42
	sprintf(fnameroot, "root/%s.root", filename);
43
	rootfile = (TFile *) gROOT->FindObject(filename);
44
	if(rootfile==NULL) rootfile = new TFile(fnameroot);
45
	if(rootfile==NULL) {
46
	  printf("Cannot open root file %s!!!\n",fnameroot);
47
	  return(0);
48
	}
49
 
50
  if(strstr(plopt, "tdc") != NULL) {
51
    TCanvas *canvas21 = new TCanvas("canvas21","canvas21",1600,800);
52
    TH3F* h0 = (TH3F*) rootfile->Get("h_correctedTDC");
53
	  Int_t binsX = h0->GetXaxis()->GetNbins();
54
    Int_t minX  = h0->GetXaxis()->GetFirst();
55
    Int_t maxX  = h0->GetXaxis()->GetLast()+1;
56
    Int_t binsY = h0->GetYaxis()->GetNbins();
57
    Int_t minY  = h0->GetYaxis()->GetFirst();
58
    Int_t maxY  = h0->GetYaxis()->GetLast()+1;
59
    Int_t binsZ = h0->GetZaxis()->GetNbins();
60
    Int_t minZ  = h0->GetZaxis()->GetFirst();
61
    Int_t maxZ  = h0->GetZaxis()->GetLast()+1;
62
    Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
63
    Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
64
    Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
65
    Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
66
 
67
    canvas21->Divide(2);
68
    //h0->Draw();
69
    canvas21->cd(1);
70
    //h0->Project3D("xy")->Draw("colz");
71
    //canvas21->cd(2);
72
    //h0->Project3D("yz")->Draw("colz");
73
    //canvas21->cd(3);
74
    TH2D* h_correctedTDC = (TH2D*) h0->Project3D("xz");
75
    //h0->GetZaxis()->SetRangeUser(-5,5);
76
    //h0->Project3D("xzo")->Draw("colz");
77
    h_correctedTDC->SetTitle("; t [ns]; Channel");
78
    h_correctedTDC->Draw("colz");
79
    /*
80
    TH1F* tdc1 = new TH1F("tdc1",";TDC [ns];Events",binsZ, minZ, maxZ);
81
    //for(int j=minY; j<maxY; j++) {
82
      for(int k=minZ; k<maxZ; k++) {
83
        double signal = h0->GetBinContent(1,1,k);
84
        tdc1->Fill(k,signal);
85
        //}
86
        }
87
    tdc1->Draw();
88
    */
89
 
90
    TH2D* h_timeWalk = (TH2D*) h0->Project3D("zy");
91
    canvas21->cd(2);
92
    h_timeWalk->SetTitle(";Threshold [V]; t [ns]");
93
    h_timeWalk->Draw("colz");
94
  }
95
 
36 f9daq 96
  if (strstr(plopt, "bias") != NULL) {
97
    TCanvas* canvas01 = new TCanvas("canvas01","",800, 800);
98
    canvas01->cd();
99
    TH2F* h_bias = (TH2F*) rootfile->Get("h_bias");
100
    h_bias->Draw("colz");
101
  }
102
 
103
  if (strstr(plopt, "th") != NULL) {
104
   TCanvas* canvas1 = new TCanvas("canvas1","",800,800);
105
   canvas1->cd();
106
   //gPad->SetLogz();
107
   //canvas1->SetLogz();
108
   TH2F* h_threshold = (TH2F*) rootfile->Get("h_threshold");
109
   h_threshold->SetTitleOffset(1.5,"y");
110
   //h_threshold->GetZaxis()->SetRangeUser(0,1000);
111
   h_threshold->SetContour(20);
112
 
113
   h_threshold->Draw("colz");
114
 
115
   TCanvas* canvas2 = new TCanvas("canvas2","",1600,800);
116
   canvas2->Divide(2);
117
   TH1D* h_projection1 = h_threshold->ProjectionY("Ch 37",38,38);
118
   canvas2->cd(1);
119
   //h_projection1->GetYaxis()->SetRangeUser(0,1000);
120
   //gPad->SetLogy();
121
   h_projection1->Draw();
122
 
123
   TH1D* h_projection2 = h_threshold->ProjectionY("Ch 38",39,39);
124
   canvas2->cd(2);
125
   //gPad->SetLogy();
126
   h_projection2->Draw();
127
  }
128
 
35 f9daq 129
  if(strstr(plopt,"16") != NULL)
130
  {
36 f9daq 131
  TH2F* h_threshold = (TH2F*) rootfile->Get("h_bias");
35 f9daq 132
  TCanvas* canvas = new TCanvas("canvas","",1600,1600);
38 f9daq 133
  TCanvas* canvas11 = new TCanvas("canvas11","",800,800);
35 f9daq 134
  canvas->cd();
135
  TVirtualPad *main = new TPad("main","main",0,0,1,1,10,1);
136
  main->Draw();
38 f9daq 137
  main->cd();
35 f9daq 138
  main->Divide(4,4);
139
  for(int i=chXstart; i<chXend; i++) {
140
    for(int j=chYstart; j<chYend; j++) {
141
      int channel = map[i][j];
142
      TH1D* h_projection = h_threshold->ProjectionY("",channel+1,channel+1);
143
      int canvasPosition = i-chXend+4*(chYend-j)+1;
144
      printf(" %d ", canvasPosition);
145
      main->cd(canvasPosition);
38 f9daq 146
      gPad->SetMargin(0.08, 0.08, 0.08, 0.08);
35 f9daq 147
      char name[128];
148
      sprintf(name,"Channel %d",channel);
149
      h_projection->SetTitle(name);
38 f9daq 150
      h_projection->GetYaxis()->SetRangeUser(0,10000);
151
      h_projection->DrawCopy("pe1x0");
152
      canvas11->cd();
153
      if (canvasPosition == 1) {
154
        h_projection->SetMarkerStyle(kFullDotMedium);
155
        h_projection->GetYaxis()->SetRangeUser(0,10000);
156
        h_projection->DrawCopy("Pl");
157
        }
158
      else {
159
        h_projection->SetMarkerStyle(kFullDotMedium);
160
        h_projection->SetLineColor(canvasPosition);
161
        h_projection->SetMarkerColor(canvasPosition);
162
        h_projection->SetTitle("");
163
        h_projection->DrawCopy("plsame");
164
        }
35 f9daq 165
    }
38 f9daq 166
 
35 f9daq 167
  }
168
  printf("\n");
169
  }
170
 
36 f9daq 171
  if(strstr(plopt, "1ch") != NULL)
172
  {
173
    TH2F* h_bias = (TH2F*) rootfile->Get("h_bias");
38 f9daq 174
    TCanvas* canvas = new TCanvas("canvas","",800,800);
36 f9daq 175
    canvas->cd();
176
    int channel = map[chXstart][chXend];
177
    TH1D* h_projection = h_bias->ProjectionY("",channel+1,channel+1);
178
    char name[128];
179
    sprintf(name,"Channel %d",channel);
180
    h_projection->SetTitle(name);
38 f9daq 181
    h_projection->SetMarkerStyle(kFullDotMedium);
182
    //h_projection->SetMarkerSize(8);
183
    gPad->SetMargin(0.1,0.1,0.1,0.1);
184
    h_projection->Draw("pe1x0");
36 f9daq 185
  }
186
 
35 f9daq 187
  if( strstr(plopt, "all") != NULL ) {
188
    TCanvas *canvas2 = new TCanvas("canvas2","Hits x;;",2000,2000);
189
    TCanvas *canvas3 = new TCanvas("canvas3","Hits y;;",2000,2000);
190
    canvas2->Divide(8,8);
191
    canvas3->Divide(8,8);
192
    TH1F* h_hitsx;
193
    TH1F* h_hitsy;
194
    for(int i=0; i<c_nChannels; i++) {
195
      canvas2->cd(i+1);
196
      char hname[128];
197
      sprintf(hname, "hnhitsx%d", i);
198
      h_hitsx = (TH1F*)rootfile->Get(hname);
199
      h_hitsx->Draw();
200
      canvas3->cd(i+1);
201
      sprintf(hname, "hnhitsy%d", i);
202
      h_hitsy = (TH1F*)rootfile->Get(hname);
203
      h_hitsy->Draw();
204
    }
205
  }
206
 
207
  if( strstr(plopt, "x") != NULL ) {
208
    TCanvas *canvas10 = new TCanvas("canvas10","Ch x;;",500,500);
209
    TH1F* h_hitsx;
210
    canvas10->cd();
211
    char hname[128];
212
    sprintf(hname, "hnhitsx%d", chXstart);
213
    h_hitsx = (TH1F*)rootfile->Get(hname);
214
    h_hitsx->Draw("colz");
215
  }
216
 
217
  if( strstr(plopt, "y") != NULL ) {
218
    TCanvas *canvas11 = new TCanvas("canvas11","Ch x;;",500,500);
219
    TH1F* h_hitsy;
220
    canvas11->cd();
221
    char hname[128];
222
    sprintf(hname, "hnhitsy%d", chXstart);
223
    h_hitsy = (TH1F*)rootfile->Get(hname);
224
    h_hitsy->Draw();
225
  }
226
 
227
  if( strstr(plopt, "share") != NULL ) {
228
   /*TCanvas *canvas4 = new TCanvas("canvas1","canvas1",1000,1000);
229
   int nChannels = chYend-chYstart+1;
230
   int ncols = nChannels/2;
231
   printf("nch %d nch\\2 %d\n", nChannels, ncols);
232
   canvas4->Divide(2,ncols);
233
   TH1F* h_hitsy;
234
   for(int i=chYstart; i<=chYend; i++){
235
     canvas4->cd(i-chYstart+1);
236
     char hname[128];
237
     int chPosition = map[0][i];
238
     sprintf(hname, "hnhitsy%d", chPosition);
239
     h_hitsy = (TH1F*)rootfile->Get(hname);
240
     h_hitsy->Draw();
241
   }*/
242
 
243
   TCanvas *canvas4 = new TCanvas("canvas4","canvas4",500,500);
244
   canvas4->cd();
245
   for(int i=chXstart; i<=chXend; i++) {
246
     TH1F* h_hitsx;
247
     char hname[128];
248
     int chPosition = map[i][chYstart];
249
     sprintf(hname, "hnhitsx%d", chPosition);
250
     h_hitsx = (TH1F*)rootfile->Get(hname);
251
     h_hitsx->SetTitle("Scan X;x [mm]; Entries");
252
     h_hitsx->GetYaxis()->SetTitleOffset(1.3);
253
     h_hitsx->SetStats(0);
254
     if (i == chXstart)
255
      h_hitsx->Draw();
256
     else {
257
      h_hitsx->SetLineColor(i+1);
258
      h_hitsx->Draw("same");
259
     }
260
   }
261
   //sprintf(fullname, "ps/%s_Yshare.eps", filename);
262
	 //canvas4->SaveAs(fullname);
263
 
264
   TCanvas *canvas5 = new TCanvas("canvas5","canvas5",500,500);
265
   canvas5->cd();
266
   for(int i=chYstart; i<=chYend; i++) {
267
     TH1F* h_hitsy;
268
     char hname[128];
269
     int chPosition = map[chXstart][i];
270
     sprintf(hname, "hnhitsy%d", chPosition);
271
     h_hitsy = (TH1F*)rootfile->Get(hname);
272
     h_hitsy->SetTitle("Scan Y;y [mm]; Entries");
273
     h_hitsy->GetYaxis()->SetTitleOffset(1.3);
274
     h_hitsy->SetStats(0);
275
     if (i == chYstart)
276
      h_hitsy->Draw();
277
     else {
278
      h_hitsy->SetLineColor(i+1);
279
      h_hitsy->Draw("same");
280
     }
281
   }
282
   //sprintf(fullname, "ps/%s_Yshare.eps", filename);
283
	 //canvas5->SaveAs(fullname);
284
  }
285
 
286
  /** Draws the signal from 8 channels in x-row
287
    * for one specific y bin, so the background and cross-talk
288
    * can be estimated.
289
    * Draws also a 2d scan of these channels.
290
    */
291
  if (strstr(plopt, "line") != NULL) {
292
    TCanvas* canvas6 = new TCanvas("canvas6","canvas6",500,500);
293
    canvas6->cd(0);
294
    gStyle->SetOptStat(0);
295
 
296
    TH2F* h0 = (TH2F*) rootfile->Get("h2d0");
297
	  Int_t binsX = h0->GetXaxis()->GetNbins();
298
    Int_t minX  = h0->GetXaxis()->GetFirst();
299
    Int_t maxX  = h0->GetXaxis()->GetLast()+1;
300
    Int_t binsY = h0->GetYaxis()->GetNbins();
301
    Int_t minY  = h0->GetYaxis()->GetFirst();
302
    Int_t maxY  = h0->GetYaxis()->GetLast()+1;
303
    Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
304
    Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
305
    Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
306
    Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
307
    if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
308
 
309
    //! 1-dimension position in x vs. hits
310
    TH2F* h[8];
311
    TH1F* h_line[8];
312
    for(int j=0; j<8; j++) {
313
      h_line[j] = new TH1F("h_line", "h_line", binsX, xLowUser, xUpUser);
314
    }
315
 
316
    for(int j=chXstart; j<=chXend; j++) {
317
      int chPosition = map[j][chYstart];
318
      char hname[128];
319
      sprintf(hname, "h2d%d", chPosition);
320
      int histogram = j;
321
      h[histogram] = (TH2F *) rootfile->Get(hname);
322
      int noise = getNoise(h[histogram], 1, 160);
323
      for(int k=minX; k<=maxX; k++) {
324
        int l=chYstart*20+12;
325
        //for(int l=12; l<=16; l++) {
326
          double signal = h[histogram]->GetBinContent(k,l);
327
          //signal -= noise;
328
          //signal /= 5*10000.0;
329
          double eta = -log(1 - signal);
330
          double x = k*(xUpUser-xLowUser)/double(binsX);
331
          //double y = l*(yUpUser-yLowUser)/double(binsY);
332
          h_line[j]->Fill(x-c_xOffset, signal);
333
        //}
334
      }
335
      if (j == chXstart) {
336
        h_line[j]->SetTitle("SiPM#2 w/o noise subtraction;x[mm];Hits");
337
        //h_line[j]->GetYaxis()->SetRangeUser(-0.05, 0.3);
338
        //h_line[j]->GetYaxis()->SetRangeUser(-50, 2500);
339
        h_line[j]->Draw("");
340
      }
341
      else {
342
        h_line[j]->SetLineColor(j+1);
343
        h_line[j]->Draw("same");
344
      }
345
    }
346
 
347
 
348
    //! 2d scan
349
    TCanvas* canvas61 = new TCanvas("canvas61","canvas61",8*200,300);
350
    canvas61->cd();
351
    TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX,xLowUser,xUpUser, binsY,yLowUser,yUpUser);
352
    for(int i=chXstart; i<=chXend; i++) {
353
      //int canvasPosition = nX*(i-chYstart)+(j-chXstart)+1;
354
      //int canvasPosition = nX*(chYend-i)+chXstart+1;
355
      //if (debug) printf("canvas %d\n",canvasPosition);
356
        int chPosition = map[i][chYstart];
357
        char hname[128];
358
	      sprintf(hname, "h2d%d", chPosition);
359
	      int histogram = i;
360
	      h[histogram] = (TH2F *) rootfile->Get(hname);
361
	      int noise = getNoise(h[histogram], 1, 100);
362
 
363
	      for(int k=minX; k<=maxX; k++) {
364
          for(int l=minY; l<=maxY; l++) {
365
            int signal = h[histogram]->GetBinContent(k,l); // detected
366
            //p /= 10000.;
367
            //double p0 = 1.0 - p; // events with zero photons
368
            //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
369
            //double eta = -log(p0);
370
            //printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
371
            //double signal = ((p - noise) > 0.1) ? (p-noise) : 0.1;
372
            double p = signal - noise;
373
            p /= 10000.0;
374
            double eta = -log(1 - p);
375
            double x = k*(xUpUser-xLowUser)/double(binsX);
376
            double y = l*(yUpUser-yLowUser)/double(binsY);
377
            h_corrected->Fill(x-c_xOffset, y-c_yOffset, eta);
378
          }
379
        }
380
    }
381
    h_corrected->SetTitle("SiPM#2 n_pe = - ln(P0);x[mm];y[mm]");
382
    h_corrected->GetZaxis()->SetRangeUser(-0.05,0.30);
383
    h_corrected->Draw("colz");
384
 
385
  }
386
 
387
  /** Draws the sum of the channels
388
    * Each channel is a 2d plot
389
    * Intended for the study of 1 channel
390
    */
391
  if (strstr(plopt, "2d") != NULL) {
392
 
393
    int nX = chXend - chXstart + 1;
394
    int nY = chYend - chYstart + 1;
395
    TCanvas* canvas7 = new TCanvas("canvas7","canvas7", nX*400,nY*400);
396
    printf("nx %d ny %d\n",nX,nY);
397
    canvas7->Divide(nX,nY);
398
    for(int i=chYstart; i<=chYend; i++) {
399
      for(int j=chXstart; j<=chXend; j++) {
400
      //int canvasPosition = nX*(i-chYstart)+(j-chXstart)+1;
401
      int canvasPosition = nX*(chYend-i)+(j-chXstart)+1;
402
      if (debug) printf("canvas %d\n",canvasPosition);
403
        canvas7->cd(canvasPosition);
404
        char hname[128];
405
        int chPosition = map[j][i];
406
        sprintf(hname, "h2d%d", chPosition);
407
        TH2F* h_2d = (TH2F*)rootfile->Get(hname);
408
        h_2d->Draw("colz");
409
      } //x
410
    }
411
 
412
    // Number of photoelectrons - Poissonian correction
413
    TCanvas* canvas8 = new TCanvas("canvas8","canvas8", 1000,1000);
414
    canvas8->cd();
415
    gStyle->SetOptStat(0);
416
      char hname[128];
417
      int chPosition = map[1][2];
418
      sprintf(hname, "h2d%d", chPosition);
419
      TH2F* h_2d = (TH2F*)rootfile->Get(hname);
420
 
421
      Int_t binsX = h_2d->GetXaxis()->GetNbins();
422
      Int_t minX  = h_2d->GetXaxis()->GetFirst();
423
      Int_t maxX  = h_2d->GetXaxis()->GetLast()+1;
424
      Int_t binsY = h_2d->GetYaxis()->GetNbins();
425
      Int_t minY  = h_2d->GetYaxis()->GetFirst();
426
      Int_t maxY  = h_2d->GetYaxis()->GetLast()+1;
427
      Double_t xLowUser  = h_2d->GetXaxis()->GetBinLowEdge(minX);
428
      Double_t xUpUser   = h_2d->GetXaxis()->GetBinUpEdge(maxX);
429
      Double_t yLowUser  = h_2d->GetYaxis()->GetBinLowEdge(minY);
430
      Double_t yUpUser =   h_2d->GetYaxis()->GetBinUpEdge(maxY);
431
      if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
432
      TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX, xLowUser, xUpUser, binsY, yLowUser, yUpUser);
433
 
434
      double noise = getNoise(h_2d, 1, 89);
435
      if(debug) printf("Noise = %f\n", noise);
436
      for(int k=minX; k<=maxX; k++) {
437
        for(int j=minY; j<=maxY; j++) {
438
          double signal = h_2d->GetBinContent(k,j); // detected
439
          //double p = ((signal - noise) > 1) ? (signal-noise) : 1;
440
          double p = signal - noise;
441
          p /= 10000.;
442
          double p0 = 1.0 - p; // events with zero photons
443
          //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
444
          double eta = -log(p0); // constant of the poissonian statistics
445
          if (debug) printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
446
          double x = k*(xUpUser-xLowUser)/double(binsX);
447
          double y = j*(yUpUser-yLowUser)/double(binsY);
448
          h_corrected->Fill(x+3,y+8, eta);
449
        }
450
       }
451
      h_corrected->SetTitle("n_pe = - ln P(0);x[mm];y[mm]");
452
      h_corrected->GetZaxis()->SetRangeUser(-0.05,0.3);
453
      h_corrected->Draw("colz");
454
 
455
      // collection efficiency
456
      int nPoints =0;
457
      double efficiency=0;
458
      for (int i=18; i<=58; i++) {
459
        for (int j=19; j<=59; j++) {
460
          double signal = h_corrected->GetBinContent(i,j);
461
          if(debug) printf("signal %f\n",signal);
462
          efficiency += signal;
463
          nPoints++;
464
        }
465
      }
466
    printf("Signal sum = %f\n   # of points = %d\n",efficiency,nPoints);
467
  }
468
 
469
  /** Draws the sum of channel signals
470
    * Each channel is a 2d ('h2d') histogram
471
    * Suitable for 8x8 chs scan
472
    */
473
  if( strstr(plopt, "sum") != NULL ) {
474
    int nX = chXend - chXstart + 1;
475
    int nY = chYend - chYstart + 1;
476
	  TCanvas* canvas12 = new TCanvas("canvas12","c2",8*200, 8*200);
477
	  canvas12->cd();
478
	  gStyle->SetOptStat(0);
479
 
480
    // final histogram parameters
481
    TH2F* h0 = (TH2F*) rootfile->Get("h2d0");
482
	  Int_t binsX = h0->GetXaxis()->GetNbins();
483
    Int_t minX  = h0->GetXaxis()->GetFirst();
484
    Int_t maxX  = h0->GetXaxis()->GetLast()+1;
485
    Int_t binsY = h0->GetYaxis()->GetNbins();
486
    Int_t minY  = h0->GetYaxis()->GetFirst();
487
    Int_t maxY  = h0->GetYaxis()->GetLast()+1;
488
    Double_t xLowUser  = h0->GetXaxis()->GetBinLowEdge(minX);
489
    Double_t xUpUser = h0->GetXaxis()->GetBinUpEdge(maxX);
490
    Double_t yLowUser  = h0->GetYaxis()->GetBinLowEdge(minY);
491
    Double_t yUpUser = h0->GetYaxis()->GetBinUpEdge(maxY);
492
    if (debug) printf("xLow %f xUp %f\n",xLowUser,xUpUser);
493
    TH2F* h_corrected = new TH2F("h_corrected","h_corrected",binsX,xLowUser,xUpUser, binsY,yLowUser,yUpUser);
494
    TH2F* h[9];
495
 
496
    // 2d histogram noise subtraction and poisson scaling
497
    for(int i=chYstart; i<=chYend; i++) {
498
      for(int j=chXstart; j<=chXend; j++) {
499
        int chPosition = map[j][i];
500
        char hname[128];
501
	      sprintf(hname, "h2d%d", chPosition);
502
	      int histogram = nX*(i-chYstart)+(j-chXstart);
503
	      h[histogram] = (TH2F *) rootfile->Get(hname);
504
	      int noise = getNoise(h[histogram], 1, 170);
505
	      if (debug) printf("noise: %d\n",noise);
506
	      for(int k=minX; k<=maxX; k++) {
507
          for(int l=minY; l<=maxY; l++) {
508
            int signal = h[histogram]->GetBinContent(k,l); // detected
509
            //double p = ((signal - noise) > 0.1) ? (signal-noise) : 0.1;
510
            double p = signal - noise;
511
            p /= 10000.;
512
            double p0 = 1.0 - p; // events with zero photons
513
            //double eta = (-log(p0) * p0 ) / (1-p0-0.00001);
514
            double eta = -log(p0);
515
            //printf("p=%f p0=%f log(p0)=%f eta=%f\n",p,p0,log(p0),eta);
516
            double x = k*(xUpUser-xLowUser)/double(binsX);
517
            double y = l*(yUpUser-yLowUser)/double(binsY);
518
            h_corrected->Fill(x-c_xOffset, y-c_yOffset, signal);
519
          }
520
        }
521
 
522
      }
523
    }
524
 
525
    h_corrected->SetTitle("SiPM#2 n_p.e.;x[mm];y[mm]");
526
    //h_corrected->GetZaxis()->SetRangeUser(-0.05,.30);
527
    h_corrected->Draw("colz");
528
 
529
    TCanvas* canvas13 = new TCanvas("canvas13","canvas13",600,300);
530
    canvas13->Divide(2);
531
    canvas13->cd(1);
532
    //h[16]->Draw("colz");
533
    canvas13->cd(2);
534
    //h[8]->Draw("colz");
535
  }
536
 
537
  return(0);
538
}
539
 
540
/** Function calculates the noise from one channel
541
  * it runs through the bins along x and returns the average value
542
  */
543
double getNoise(TH2F* histogram, int yStart, int yEnd)
544
{
545
  double noise=0;
546
  int count=0;
547
  for(int j=yStart; j<yEnd; j++) {
548
    double value = histogram->GetBinContent(j,2);
549
    //if (noise < value) noise = value;
550
    noise += value;
551
    count++;
552
    }
553
  return (noise/double(count));
554
}
555