Changeset 5600 for trunk/MagicSoft/Simulation/Detector/Camera/camera.cxx

Timestamp:

12/15/04 01:56:39 (20 years ago)

Author:

MAGIC

Message:

 Added input card option pmt_jitter_ns to simulate the time jitter of
 PMTs. The input parameter is the sigma of a gaussian, which by
 default is sigma=0.25 ns. This jitter is applied to each phe-
 independently. We have not applied this to the NSB noise, since the
 arrival time of NSB photons is random and nothing would change.

File:

• trunk/MagicSoft/Simulation/Detector/Camera/camera.cxx (modified) (12 diffs)

trunk/MagicSoft/Simulation/Detector/Camera/camera.cxx

@@ -11 +11 @@
 // @date        Thu May  7 16:24:22 1998
 //
-//----------------------------------------------------------------------
-//
-// Created: Thu May  7 16:24:22 1998
-// Author:  Jose Carlos Gonzalez
-// Purpose: Program for reflector simulation
-// Notes:   See files README for details
-//    
-//----------------------------------------------------------------------
-//
-// $RCSfile: camera.cxx,v $
-// $Revision: 1.83 $
-// $Author: moralejo $ 
-// $Date: 2004-11-17 11:43:13 $
-//
-////////////////////////////////////////////////////////////////////////
-// @tableofcontents @coverpage
 
 //=-----------------------------------------------------------
 //!@section Source code of |camera.cxx|.
-
-/*!@"
-
-  In this section we show the (commented) code of the program for the
-  read-out of the output files generated by the simulator of the
-  reflector, |reflector 0.3|.
-
-  @"*/
 
 //=-----------------------------------------------------------
@@ -229 +205 @@
 static  float Azimutal = 90.0;
 
-//@: Miss Pointing Simulation
+//@: Mispointing Simulation
 static   int missPointing = 0;
 static   float missP_x = 0.0;
@@ -238 +214 @@
 static  float Spot_y=0.0;
 static  float Spotsigma=0.0;
+
+//@: PMT time jitter
+static  float pmt_jitter=0.25;
 
   
@@ -737 +716 @@
   missPointing = get_misspointing(&missP_x,&missP_y);
   Spotsigma = get_sigma_xy_cm_spot(&Spot_x,&Spot_y);
+  pmt_jitter = get_pmt_jitter_ns();
 
 
@@ -2967 +2947 @@
     McConfigRunHeader[ict]->InitSizePMTs(ct_NPixels);
     for(int i=0; i<(Int_t)((MGeomCam*)(camgeom.UncheckedAt(ict)))->GetNumPixels();i++){
-      McConfigRunHeader[ict]->AddPMT(i);
-      MGeomPMT &pmt  = McConfigRunHeader[ict]->GetPMT(i);
-      qe_pmt.Set(pointsQE[ict],QE[ict][i][1]);
-      wav_pmt.Set(pointsQE[ict],QElambda);
-      pmt.SetArraySize(pointsQE[ict]);
-      pmt.SetPMTContent(i,wav_pmt,qe_pmt);
+        McConfigRunHeader[ict]->SetPmtTimeJitter(pmt_jitter);
+        McConfigRunHeader[ict]->AddPMT(i);
+        MGeomPMT &pmt  = McConfigRunHeader[ict]->GetPMT(i);
+        qe_pmt.Set(pointsQE[ict],QE[ict][i][1]);
+        wav_pmt.Set(pointsQE[ict],QElambda);
+        pmt.SetArraySize(pointsQE[ict]);
+        pmt.SetPMTContent(i,wav_pmt,qe_pmt);
     }
     
@@ -4076 +4057 @@
   static UInt_t seed = (UInt_t)(get_seeds(0)*get_seeds(1));
 
-  Float_t t;
+  float time;
+  float pmtjit;
 
   // reset variables
@@ -4119 +4101 @@
     //  Check if photon is inside trigger time range
 
-    t = photon.get_t() ;
-
-    if (t-*tmin_ns>TOTAL_TRIGGER_TIME) {
+    time = photon.get_t() ;
+
+    if (time-*tmin_ns>TOTAL_TRIGGER_TIME) {
         continue;
     }
@@ -4216 +4198 @@
 
     //
-    // Apply incient angular correction due to Light Guides, plexiglas,
+    // Apply incident angular correction due to Light Guides, plexiglas,
     // 1st dynode collection efficiency, double crossings... etc. 
     // This information is contained in the file Data/LightCollection.dat
@@ -4260 +4242 @@
     nphe[ipixnum] += 1.0;
 
+    //
+    // PMT time jitter: gaussian, not negative (MTrigger::FillShow does
+    // not accept negative times!)
+    //
+    do 
+      pmtjit = random.Gaus(3.*pmt_jitter, pmt_jitter);
+    while(pmtjit<0.);
 
     // store the new photoelectron
 
-    fadc->Fill(ipixnum,(t-*tmin_ns) + fadc_jitter , 
-               trigger->FillShow(ipixnum, t-*tmin_ns + fadc_jitter),
+    fadc->Fill(ipixnum,
+               (time-*tmin_ns) + pmtjit + fadc_jitter, 
+               trigger->FillShow(ipixnum, time-*tmin_ns + pmtjit + fadc_jitter),
                !((*camgeom)[ipixnum].GetD()>(*camgeom)[0].GetD()));
     
@@ -4770 +4760 @@
   float **qept;
   float radius_mm, focal_dist_mm;
-  int total_photons;
+  int   total_photons;
+  float pmtjit;
+
   static UInt_t seed = (UInt_t)(get_seeds(0)*get_seeds(1));
 
@@ -4939 +4931 @@
       nphe[ipixnum] += 1.;
 
+      //
+      // PMT time jitter: gaussian, not negative (MTrigger::FillShow does
+      // not accept negative times!)
+      //
+      do 
+        pmtjit = random.Gaus(3.*pmt_jitter, pmt_jitter);
+      while(pmtjit<0.);
+
       // store the new photoelectron
 
-      fadc->Fill(ipixnum, time + fadc_jitter, 
-                 trigger->FillShow(ipixnum, time + fadc_jitter),
+      fadc->Fill(ipixnum, time + pmtjit + fadc_jitter, 
+                 trigger->FillShow(ipixnum, time + pmtjit + fadc_jitter),
                  !((*camgeom)[ipixnum].GetD()>(*camgeom)[0].GetD()));
     
@@ -4963 +4963 @@
 //
 // $Log: not supported by cvs2svn $
+// Revision 1.83  2004/11/17 11:43:13  moralejo
+//
+//  Made the necessary changes in starresponse to account for the new option
+//  to switch off gain fluctuations for the NSB noise database generation.
+//  The option in the Star Response card is "gain_fluctuations_off". The
+//  version number of the NSB database has been updated to 1004 (see
+//  MStarLight.hxx), now including information on whether the gain
+//  fluctuations were on or off when the NSB database was generated.
+//
 // Revision 1.82  2004/11/17 11:34:49  moralejo
 //