+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/*
+$Log$
+Revision 1.21 2000/06/09 11:10:07 cblume
+Compiler warnings and coding conventions, next round
+
+Revision 1.20 2000/06/08 18:32:58 cblume
+Make code compliant to coding conventions
+
+Revision 1.19 2000/06/07 16:27:32 cblume
+Try to remove compiler warnings on Sun and HP
+
+Revision 1.18 2000/05/08 16:17:27 cblume
+Merge TRD-develop
+
+Revision 1.17.2.1 2000/05/08 14:59:16 cblume
+Made inline function non-virtual. Bug fix in setting sensitive chamber
+
+Revision 1.17 2000/02/28 19:10:26 cblume
+Include the new TRD classes
+
+Revision 1.16.4.1 2000/02/28 18:04:35 cblume
+Change to new hit version, introduce geometry class, and move digitization and clustering to AliTRDdigitizer/AliTRDclusterizerV1
+
+Revision 1.16 1999/11/05 22:50:28 fca
+Do not use Atan, removed from ROOT too
+
+Revision 1.15 1999/11/02 17:20:19 fca
+initialise nbytes before using it
+
+Revision 1.14 1999/11/02 17:15:54 fca
+Correct ansi scoping not accepted by HP compilers
+
+Revision 1.13 1999/11/02 17:14:51 fca
+Correct ansi scoping not accepted by HP compilers
+
+Revision 1.12 1999/11/02 16:35:56 fca
+New version of TRD introduced
+
+Revision 1.11 1999/11/01 20:41:51 fca
+Added protections against using the wrong version of FRAME
+
+Revision 1.10 1999/09/29 09:24:35 fca
+Introduction of the Copyright and cvs Log
+
+*/
+
///////////////////////////////////////////////////////////////////////////////
// //
-// Transition Radiation Detector version 1 -- detailed simulation //
+// Transition Radiation Detector version 2 -- slow simulator //
// //
//Begin_Html
/*
-<img src="gif/AliTRDv1Class.gif">
+<img src="picts/AliTRDfullClass.gif">
*/
//End_Html
// //
///////////////////////////////////////////////////////////////////////////////
#include <TMath.h>
-#include <TRandom.h>
#include <TVector.h>
-#include <TGeometry.h>
-#include <TNode.h>
-#include <TPGON.h>
+#include <TRandom.h>
-#include "GParticle.h"
-#include "AliTRDv1.h"
#include "AliRun.h"
-#include "AliConst.h"
#include "AliMC.h"
-
+#include "AliConst.h"
+
+#include "AliTRDv1.h"
+#include "AliTRDmatrix.h"
+#include "AliTRDgeometry.h"
+
ClassImp(AliTRDv1)
+
+//_____________________________________________________________________________
+AliTRDv1::AliTRDv1():AliTRD()
+{
+ //
+ // Default constructor
+ //
+
+ fIdSens = 0;
+
+ fIdChamber1 = 0;
+ fIdChamber2 = 0;
+ fIdChamber3 = 0;
+
+ fSensSelect = 0;
+ fSensPlane = -1;
+ fSensChamber = -1;
+ fSensSector = -1;
+ fSensSectorRange = 0;
+
+ fDeltaE = NULL;
+
+}
+
//_____________________________________________________________________________
AliTRDv1::AliTRDv1(const char *name, const char *title)
:AliTRD(name, title)
{
//
- // Standard constructor for the Transition Radiation Detector version 1
+ // Standard constructor for Transition Radiation Detector version 1
+ //
+
+ fIdSens = 0;
+
+ fIdChamber1 = 0;
+ fIdChamber2 = 0;
+ fIdChamber3 = 0;
+
+ fSensSelect = 0;
+ fSensPlane = -1;
+ fSensChamber = -1;
+ fSensSector = -1;
+ fSensSectorRange = 0;
+
+ fDeltaE = NULL;
+
+ SetBufferSize(128000);
+
+}
+
+//_____________________________________________________________________________
+AliTRDv1::AliTRDv1(const AliTRDv1 &trd)
+{
+ //
+ // Copy constructor
//
- fIdSens1 = fIdSens2 = fIdSens3 = 0;
+
+ ((AliTRDv1 &) trd).Copy(*this);
+
+}
+
+//_____________________________________________________________________________
+AliTRDv1::~AliTRDv1()
+{
+ //
+ // AliTRDv1 destructor
+ //
+
+ if (fDeltaE) delete fDeltaE;
+
}
//_____________________________________________________________________________
-void AliTRDv1::CreateGeometry()
+AliTRDv1 &AliTRDv1::operator=(const AliTRDv1 &trd)
{
//
- // Create the geometry for the Transition Radiation Detector version 1
- // --- The coarse geometry of the TRD, that can be used for background
- // studies. This version leaves the space in front of the PHOS and
- // HMPID empty.
- // -- Author : Nick van Eijndhoven (CERN) 24/09/90
- //
- //Begin_Html
- /*
- <img src="gif/AliTRDv1.gif">
- */
- //End_Html
- //Begin_Html
- /*
- <img src="gif/AliTRDv1Tree.gif">
- */
- //End_Html
-
- Float_t xpos, ypos, zpos, f;
- Int_t idmat[5];
- Float_t widma, theoc, widmi, tanzr;
- Float_t par_ic[4], par_oc[11], phisec, par_mo[10], par_fr[4], par_su[10];
-
- Int_t *idtmed = gAlice->Idtmed();
-
- // --- Name Conventions :
- // TRD --> Mother TRD volume (Air)
- // UTRL(S) --> Long (short) subdetector-type (Al)
- // UTSL(S) --> Sectors of a subdetector (Al)
- // UTFI(O/S) --> Inner part of the detector frame (Air)
- // UTCI(O/S) --> Frames of the inner and outer chambers (C)
- // UTII(O/S) --> Inner part of the chambers (Air)
- // UTMI(O/S) --> Modules in the chambers (Air)
- // UT1I(O/S) --> Radiator layer (CO2)
- // UT2I(O/S) --> Polyethylene layer (PE)
- // UT3I(O/S) --> Mylar layer (Mylar)
- // UT4I(O/S) --> Xe/C02 layer (Xe/C02)
- // UT5I(O/S) --> Cu layer (pads/sensitive) (Cu)
- // UT6I(O/S) --> Kapton layer (Kapton)
- // UT7I(O/S) --> NOMEX layer (C)
- // UT8I(O/S) --> Readout layer (Al)
-
- // --- Contains geometry information
-
- // --- Number of sectors in the full detector
- // --- Number of modules in each sector
- // --- z-Coordinates of the TRD-frame
- // --- r-Coordinates of the TRD-frame
- // --- Thickness of the aluminium of the support frame
- // --- Thickness of the interior of the support frame
- // --- Thickness of the carbon chamber frame
- // --- Thickness and z-position of the PE-layer in the radiator
- // --- Thickness and z-position of the radiator
- // --- Thickness and z-position of the mylar-layer
- // --- Thickness and z-position of the Xe/C02-layer
- // --- Thickness and z-position of the Cu-layer (Pads)
- // --- Thickness and z-position of the kapton-layer
- // --- Thickness and z-position of the NOMEX-layer
- // Simple C-layer for the time being
- // --- Thickness and z-position of the readout-layer
- // --- Parameter for the arrays
- // --- Number of subdetector-types
- //--- Number of sectors in the first subdetector-type (full theta coverage)
- //--- Number of sectors in the second subdetector-type (with hole for PHOS)
- //************************************************************************
-
- // Definition of Volumes
-
- //************************************************************************
-
- const Int_t nsec1 = 5; //Number of sectors in the first subdetector-type
- const Int_t nsec2 = 5; //Number of sectors in the second subdetector-type
-
- AliMC* pMC = AliMC::GetMC();
-
- phisec = 360./nsect; //The phi-angle of the sectors
- widmi = rmin*TMath::Sin(kPI/nsect);
- widma = rmax*TMath::Sin(kPI/nsect);
- // --- Definition of the Mother volume for the TRD (Al)
- par_mo[0] = 0.;
- par_mo[1] = 360.;
- par_mo[2] = nsect;
- par_mo[3] = 2.;
- par_mo[4] = -zmax1;
- par_mo[5] = rmin;
- par_mo[6] = rmax;
- par_mo[7] = zmax1;
- par_mo[8] = rmin;
- par_mo[9] = rmax;
- pMC->Gsvolu("TRD ", "PGON", idtmed[1301], par_mo, 10);
- // --- Definition of the 1st subdetector-type (full theta-coverage) (Al)
- par_su[0] = 120.;
- par_su[1] = nsec1*phisec;
- par_su[2] = nsec1;
- par_su[3] = 2.;
- par_su[4] = -zmax1;
- par_su[5] = rmin;
- par_su[6] = rmax;
- par_su[7] = 0.;
- par_su[8] = rmin;
- par_su[9] = rmax;
- pMC->Gsvolu("UTRL", "PGON", idtmed[1300], par_su, 10);
- pMC->Gsdvn("UTSL", "UTRL", nsec1, 2);
- // --- Definition of the 2nd subdetector-type (hole for PHOS)
- par_su[0] = 220.;
- par_su[1] = nsec2*phisec;
- par_su[2] = nsec2;
- par_su[3] = 2.;
- par_su[4] = -zmax1;
- par_su[5] = rmin;
- par_su[6] = rmax;
- par_su[7] = -zmax1/2;
- par_su[8] = rmin;
- par_su[9] = rmax;
- pMC->Gsvolu("UTRS", "PGON", idtmed[1300], par_su, 10);
- pMC->Gsdvn("UTSS", "UTRS", nsec2, 2);
- // --- Definition of the inner part of the detector frame (Air)
- par_fr[0] = widmi;
- par_fr[1] = widma;
- par_fr[2] = zmax1/4 - alfram2/2;
- par_fr[3] = (rmax-rmin)/2;
- pMC->Gsvolu("UTFI", "TRD1", idtmed[1301], par_fr, 4);
- pMC->Gsvolu("UTFO", "TRD1", idtmed[1301], par_fr, 4);
- pMC->Gsvolu("UTFS", "TRD1", idtmed[1301], par_fr, 4);
- // --- Calculate the shape-parameter for the outer chambers
- tanzr = (zmax1-zmax2)/(rmax-rmin);
- theoc = -kRaddeg*TMath::ATan(tanzr / 2.);
- // --- The carbon frame of the outer chambers
- par_oc[0] = (rmax-rmin)/2;
- par_oc[1] = theoc;
- par_oc[2] = 90.;
- par_oc[3] = zmax2/2 - zmax1/4 -alfram2/2;
- par_oc[4] = widmi - (inframe+alfram1)/2;
- par_oc[5] = widmi - (inframe+alfram1)/2;
- par_oc[6] = 0.;
- par_oc[7] = zmax1/4 - alfram2/2;
- par_oc[8] = widma - (inframe+alfram1)/2;
- par_oc[9] = widma - (inframe+alfram1)/2;
- par_oc[10] = 0.;
- pMC->Gsvolu("UTCO", "TRAP", idtmed[1306], par_oc, 11);
- // --- The inner part of the outer chambers (Air)
- par_oc[3] -= ccframe;
- par_oc[4] -= ccframe;
- par_oc[5] -= ccframe;
- par_oc[7] -= ccframe;
- par_oc[8] -= ccframe;
- par_oc[9] -= ccframe;
- pMC->Gsvolu("UTIO", "TRAP", idtmed[1301], par_oc, 11);
- // --- Definition of the six modules within each outer chamber
- pMC->Gsdvn("UTMO", "UTIO", nmodul, 3);
- // --- Definition of the layers of each outer chamber
- par_oc[1] = theoc;
- par_oc[2] = 90.;
- par_oc[3] = -1.;
- par_oc[4] = -1.;
- par_oc[5] = -1.;
- par_oc[6] = 0.;
- par_oc[7] = -1.;
- par_oc[8] = -1.;
- par_oc[9] = -1.;
- par_oc[10] = 0.;
- // --- Radiator layer
- par_oc[0] = rathick/2;
- pMC->Gsvolu("UT1O", "TRAP", idtmed[1311], par_oc, 11);
- // --- Polyethylene layer
- par_oc[0] = pethick/2;
- pMC->Gsvolu("UT2O", "TRAP", idtmed[1302], par_oc, 11);
- // --- Mylar layer
- par_oc[0] = mythick/2;
- pMC->Gsvolu("UT3O", "TRAP", idtmed[1307], par_oc, 11);
- // --- Xe/CO2 layer
- par_oc[0] = xethick/2;
- pMC->Gsvolu("UT4O", "TRAP", idtmed[1308], par_oc, 11);
- // --- Cu layer
- par_oc[0] = cuthick/2;
- pMC->Gsvolu("UT5O", "TRAP", idtmed[1304], par_oc, 11);
- // --- Kapton layer
- par_oc[0] = kathick/2;
- pMC->Gsvolu("UT6O", "TRAP", idtmed[1310], par_oc, 11);
- // --- NOMEX layer
- par_oc[0] = nothick/2;
- pMC->Gsvolu("UT7O", "TRAP", idtmed[1309], par_oc, 11);
- // --- Read out layer
- par_oc[0] = rothick/2;
- pMC->Gsvolu("UT8O", "TRAP", idtmed[1305], par_oc, 11);
- // --- The carbon frame of the chambers in the short sectors
- par_oc[0] = (rmax-rmin)/2;
- par_oc[1] = theoc;
- par_oc[2] = 90.;
- par_oc[3] = zmax2/2 - zmax1/4 -alfram2/2;
- par_oc[4] = widmi - (inframe+alfram1)/2;
- par_oc[5] = widmi - (inframe+alfram1)/2;
- par_oc[6] = 0.;
- par_oc[7] = zmax1/4 - alfram2/2;
- par_oc[8] = widma - (inframe+alfram1)/2;
- par_oc[9] = widma - (inframe+alfram1)/2;
- par_oc[10] = 0.;
- pMC->Gsvolu("UTCS", "TRAP", idtmed[1306], par_oc, 11);
- // --- The inner part of the chambers in the short sectors (Air)
- par_oc[3] -= ccframe;
- par_oc[4] -= ccframe;
- par_oc[5] -= ccframe;
- par_oc[7] -= ccframe;
- par_oc[8] -= ccframe;
- par_oc[9] -= ccframe;
- pMC->Gsvolu("UTIS", "TRAP", idtmed[1301], par_oc, 11);
- //--- Definition of the six modules within each chamber of the short sectors
- pMC->Gsdvn("UTMS", "UTIS", 6, 3);
- // --- Definition of the layers of each chamber in the short sectors
- par_oc[1] = theoc;
- par_oc[2] = 90.;
- par_oc[3] = -1.;
- par_oc[4] = -1.;
- par_oc[5] = -1.;
- par_oc[6] = 0.;
- par_oc[7] = -1.;
- par_oc[8] = -1.;
- par_oc[9] = -1.;
- par_oc[10] = 0.;
- // --- Radiator layer
- par_oc[0] = rathick/2;
- pMC->Gsvolu("UT1S", "TRAP", idtmed[1311], par_oc, 11);
- // --- Polyethylene layer
- par_oc[0] = pethick/2;
- pMC->Gsvolu("UT2S", "TRAP", idtmed[1302], par_oc, 11);
- // --- Mylar layer
- par_oc[0] = mythick/2;
- pMC->Gsvolu("UT3S", "TRAP", idtmed[1307], par_oc, 11);
- // --- Xe/CO2 layer
- par_oc[0] = xethick/2;
- pMC->Gsvolu("UT4S", "TRAP", idtmed[1308], par_oc, 11);
- // --- Cu layer
- par_oc[0] = cuthick/2;
- pMC->Gsvolu("UT5S", "TRAP", idtmed[1304], par_oc, 11);
- // --- Kapton layer
- par_oc[0] = kathick/2;
- pMC->Gsvolu("UT6S", "TRAP", idtmed[1310], par_oc, 11);
- // --- NOMEX layer
- par_oc[0] = nothick/2;
- pMC->Gsvolu("UT7S", "TRAP", idtmed[1309], par_oc, 11);
- // --- Read out layer
- par_oc[0] = rothick/2;
- pMC->Gsvolu("UT8S", "TRAP", idtmed[1305], par_oc, 11);
- // --- The carbon frame of the inner chambers
- par_ic[0] = widmi - (inframe+alfram1)/2;
- par_ic[1] = widma - (inframe+alfram1)/2;
- par_ic[2] = zmax1/4 - alfram2/2;
- par_ic[3] = (rmax-rmin)/2;
- pMC->Gsvolu("UTCI", "TRD1", idtmed[1306], par_ic, 4);
- // --- The inner part of the inner chambers (Air)
- par_ic[0] -= ccframe;
- par_ic[1] -= ccframe;
- par_ic[2] -= ccframe;
- pMC->Gsvolu("UTII", "TRD1", idtmed[1301], par_ic, 4);
- // --- Definition of the six modules within each outer chamber
- pMC->Gsdvn("UTMI", "UTII", nmodul, 3);
- // --- Definition of the layers of each inner chamber
- par_ic[0] = -1.;
- par_ic[1] = -1.;
- par_ic[2] = -1.;
- // --- Radiator layer
- par_ic[3] = rathick/2;
- pMC->Gsvolu("UT1I", "TRD1", idtmed[1311], par_ic, 4);
- // --- Polyethylene layer
- par_ic[3] = pethick/2;
- pMC->Gsvolu("UT2I", "TRD1", idtmed[1302], par_ic, 4);
- // --- Mylar layer
- par_ic[3] = mythick/2;
- pMC->Gsvolu("UT3I", "TRD1", idtmed[1307], par_ic, 4);
- // --- Xe/CO2 layer
- par_ic[3] = xethick/2;
- pMC->Gsvolu("UT4I", "TRD1", idtmed[1308], par_ic, 4);
- // --- Cu layer
- par_ic[3] = cuthick/2;
- pMC->Gsvolu("UT5I", "TRD1", idtmed[1304], par_ic, 4);
- // --- Kapton layer
- par_ic[3] = kathick/2;
- pMC->Gsvolu("UT6I", "TRD1", idtmed[1310], par_ic, 4);
- // --- NOMEX layer
- par_ic[3] = nothick/2;
- pMC->Gsvolu("UT7I", "TRD1", idtmed[1309], par_ic, 4);
- // --- Read out layer
- par_ic[3] = rothick/2;
- pMC->Gsvolu("UT8I", "TRD1", idtmed[1305], par_ic, 4);
- //************************************************************************
-
- // Positioning of Volumes
-
- //************************************************************************
- // --- The rotation matrices
- AliMatrix(idmat[0], 90., 180., 90., 90., 0., 0.);
- AliMatrix(idmat[1], 90., 0., 90., 90., 180., 0.);
- AliMatrix(idmat[2], 90., 180., 90., 90., 180., 0.);
- AliMatrix(idmat[3], 90., 90., 180., 0., 90., 0.);
- AliMatrix(idmat[4], 90., 90., 0., 0., 90., 0.);
- // --- Position of the layers in a TRD module
- f = TMath::Tan(theoc * kDegrad);
- pMC->Gspos("UT8O", 1, "UTMO", 0., f*rozpos, rozpos, 0, "ONLY");
- pMC->Gspos("UT7O", 1, "UTMO", 0., f*nozpos, nozpos, 0, "ONLY");
- pMC->Gspos("UT6O", 1, "UTMO", 0., f*kazpos, kazpos, 0, "ONLY");
- pMC->Gspos("UT5O", 1, "UTMO", 0., f*cuzpos, cuzpos, 0, "ONLY");
- pMC->Gspos("UT4O", 1, "UTMO", 0., f*xezpos, xezpos, 0, "ONLY");
- pMC->Gspos("UT3O", 1, "UTMO", 0., f*myzpos, myzpos, 0, "ONLY");
- pMC->Gspos("UT1O", 1, "UTMO", 0., f*razpos, razpos, 0, "ONLY");
- pMC->Gspos("UT2O", 1, "UT1O", 0., f*pezpos, pezpos, 0, "ONLY");
-
- pMC->Gspos("UT8S", 1, "UTMS", 0., f*rozpos, rozpos, 0, "ONLY");
- pMC->Gspos("UT7S", 1, "UTMS", 0., f*nozpos, nozpos, 0, "ONLY");
- pMC->Gspos("UT6S", 1, "UTMS", 0., f*kazpos, kazpos, 0, "ONLY");
- pMC->Gspos("UT5S", 1, "UTMS", 0., f*cuzpos, cuzpos, 0, "ONLY");
- pMC->Gspos("UT4S", 1, "UTMS", 0., f*xezpos, xezpos, 0, "ONLY");
- pMC->Gspos("UT3S", 1, "UTMS", 0., f*myzpos, myzpos, 0, "ONLY");
- pMC->Gspos("UT1S", 1, "UTMS", 0., f*razpos, razpos, 0, "ONLY");
- pMC->Gspos("UT2S", 1, "UT1S", 0., f*pezpos, pezpos, 0, "ONLY");
-
- pMC->Gspos("UT8I", 1, "UTMI", 0., 0., rozpos, 0, "ONLY");
- pMC->Gspos("UT7I", 1, "UTMI", 0., 0., nozpos, 0, "ONLY");
- pMC->Gspos("UT6I", 1, "UTMI", 0., 0., kazpos, 0, "ONLY");
- pMC->Gspos("UT5I", 1, "UTMI", 0., 0., cuzpos, 0, "ONLY");
- pMC->Gspos("UT4I", 1, "UTMI", 0., 0., xezpos, 0, "ONLY");
- pMC->Gspos("UT3I", 1, "UTMI", 0., 0., myzpos, 0, "ONLY");
- pMC->Gspos("UT1I", 1, "UTMI", 0., 0., razpos, 0, "ONLY");
- pMC->Gspos("UT2I", 1, "UT1I", 0., 0., pezpos, 0, "ONLY");
- // --- Position of the inner part of the chambers
- pMC->Gspos("UTII", 1, "UTCI", 0., 0., 0., 0, "ONLY");
- pMC->Gspos("UTIO", 1, "UTCO", 0., 0., 0., 0, "ONLY");
- pMC->Gspos("UTIS", 1, "UTCS", 0., 0., 0., 0, "ONLY");
- // --- Position of the chambers in the support frame
- xpos = 0.;
- ypos = (zmax1-zmax2)/4;
- zpos = 0.;
- pMC->Gspos("UTCO", 1, "UTFO", xpos, ypos, zpos, 0, "ONLY");
- xpos = 0.;
- ypos = (zmax1-zmax2)/4;
- zpos = 0.;
- pMC->Gspos("UTCS", 1, "UTFS", xpos, ypos, zpos, 0, "ONLY");
- xpos = 0.;
- ypos = 0.;
- zpos = 0.;
- pMC->Gspos("UTCI", 1, "UTFI", xpos, ypos, zpos, 0, "ONLY");
- // --- Position of the inner part of the frame in the sectors
- xpos = (rmax+rmin)/2;
- ypos = 0;
- zpos = -zmax1*3/4;
- pMC->Gspos("UTFO", 1, "UTSL", xpos, ypos, zpos, idmat[4], "ONLY");
- xpos = (rmax+rmin)/2;
- ypos = 0;
- zpos = -zmax1*3/4;
- pMC->Gspos("UTFS", 1, "UTSS", xpos, ypos, zpos, idmat[4], "ONLY");
- xpos = (rmax+rmin)/2;
- ypos = 0.;
- zpos = -zmax1/4;
- pMC->Gspos("UTFI", 1, "UTSL", xpos, ypos, zpos, idmat[4], "ONLY");
- // --- Position of the subdetectors in the mother volume
- pMC->Gspos("UTRL", 1, "TRD ", 0., 0., 0., 0, "ONLY");
- pMC->Gspos("UTRL", 2, "TRD ", 0., 0., 0., idmat[0], "ONLY");
- pMC->Gspos("UTRL", 3, "TRD ", 0., 0., 0., idmat[1], "ONLY");
- pMC->Gspos("UTRL", 4, "TRD ", 0., 0., 0., idmat[2], "ONLY");
- pMC->Gspos("UTRS", 1, "TRD ", 0., 0., 0., 0, "ONLY");
- pMC->Gspos("UTRS", 2, "TRD ", 0., 0., 0., idmat[1], "ONLY");
- // --- Position of TRD mother volume in ALICE experiment
- pMC->Gspos("TRD ", 1, "ALIC", 0., 0., 0., 0, "ONLY");
+ // Assignment operator
+ //
+
+ if (this != &trd) ((AliTRDv1 &) trd).Copy(*this);
+ return *this;
+
}
//_____________________________________________________________________________
-void AliTRDv1::DrawModule()
+void AliTRDv1::Copy(TObject &trd)
+{
+ //
+ // Copy function
+ //
+
+ ((AliTRDv1 &) trd).fIdSens = fIdSens;
+
+ ((AliTRDv1 &) trd).fIdChamber1 = fIdChamber1;
+ ((AliTRDv1 &) trd).fIdChamber2 = fIdChamber2;
+ ((AliTRDv1 &) trd).fIdChamber3 = fIdChamber3;
+
+ ((AliTRDv1 &) trd).fSensSelect = fSensSelect;
+ ((AliTRDv1 &) trd).fSensPlane = fSensPlane;
+ ((AliTRDv1 &) trd).fSensChamber = fSensChamber;
+ ((AliTRDv1 &) trd).fSensSector = fSensSector;
+ ((AliTRDv1 &) trd).fSensSectorRange = fSensSectorRange;
+
+ ((AliTRDv1 &) trd).fDeltaE = NULL;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDv1::CreateGeometry()
{
//
- // Draw a shaded view of the Transition Radiation Detector version 1
- //
-
- AliMC* pMC = AliMC::GetMC();
-
- // Set everything unseen
- pMC->Gsatt("*", "seen", -1);
- //
- // Set ALIC mother transparent
- pMC->Gsatt("ALIC","SEEN",0);
- //
- // Set the volumes visible
- pMC->Gsatt("TRD","SEEN",0);
- pMC->Gsatt("UTRL","SEEN",0);
- pMC->Gsatt("UTSL","SEEN",0);
- pMC->Gsatt("UTRS","SEEN",0);
- pMC->Gsatt("UTSS","SEEN",0);
- pMC->Gsatt("UTFI","SEEN",0);
- pMC->Gsatt("UTFO","SEEN",0);
- pMC->Gsatt("UTFS","SEEN",0);
- pMC->Gsatt("UTCO","SEEN",0);
- pMC->Gsatt("UTIO","SEEN",0);
- pMC->Gsatt("UTMO","SEEN",0);
- pMC->Gsatt("UT1O","SEEN",1);
- pMC->Gsatt("UT4O","SEEN",1);
- pMC->Gsatt("UTCS","SEEN",0);
- pMC->Gsatt("UTIS","SEEN",0);
- pMC->Gsatt("UTMS","SEEN",0);
- pMC->Gsatt("UT1S","SEEN",1);
- pMC->Gsatt("UT4S","SEEN",1);
- pMC->Gsatt("UTCI","SEEN",0);
- pMC->Gsatt("UTII","SEEN",0);
- pMC->Gsatt("UTMI","SEEN",0);
- pMC->Gsatt("UT1I","SEEN",1);
- pMC->Gsatt("UT4I","SEEN",1);
- //
- pMC->Gdopt("hide", "on");
- pMC->Gdopt("shad", "on");
- pMC->Gsatt("*", "fill", 7);
- pMC->SetClipBox(".");
- pMC->SetClipBox("*", 0, 2000, -2000, 2000, -2000, 2000);
- pMC->DefaultRange();
- pMC->Gdraw("alic", 40, 30, 0, 12, 9.4, .021, .021);
- pMC->Gdhead(1111, "Transition Radiation Detector Version 1");
- pMC->Gdman(18, 4, "MAN");
+ // Create the GEANT geometry for the Transition Radiation Detector - Version 1
+ // This version covers the full azimuth.
+ //
+
+ // Check that FRAME is there otherwise we have no place where to put the TRD
+ AliModule* frame = gAlice->GetModule("FRAME");
+ if (!frame) return;
+
+ // Define the chambers
+ AliTRD::CreateGeometry();
+
}
//_____________________________________________________________________________
//
// Create materials for the Transition Radiation Detector version 1
//
- printf("TRD: Fast simulation with coarse geometry\n");
- AliTRD::CreateMaterials();
+
+ AliTRD::CreateMaterials();
+
}
//_____________________________________________________________________________
void AliTRDv1::Init()
{
//
- // Initialise the Transition Radiation Detector after the geometry is built
+ // Initialise Transition Radiation Detector after geometry has been built.
//
+
AliTRD::Init();
- AliMC* pMC = AliMC::GetMC();
- fIdSens1 = pMC->VolId("UT5I");
- fIdSens2 = pMC->VolId("UT5O");
- fIdSens3 = pMC->VolId("UT5S");
+
+ printf(" Slow simulator\n\n");
+ if (fSensSelect) {
+ if (fSensPlane >= 0)
+ printf(" Only plane %d is sensitive\n",fSensPlane);
+ if (fSensChamber >= 0)
+ printf(" Only chamber %d is sensitive\n",fSensChamber);
+ if (fSensSector >= 0) {
+ Int_t sens1 = fSensSector;
+ Int_t sens2 = fSensSector + fSensSectorRange;
+ sens2 -= ((Int_t) (sens2 / kNsect)) * kNsect;
+ printf(" Only sectors %d - %d are sensitive\n",sens1,sens2-1);
+ }
+ }
+ printf("\n");
+
+ // First ionization potential (eV) for the gas mixture (90% Xe + 10% CO2)
+ const Float_t kPoti = 12.1;
+ // Maximum energy (50 keV);
+ const Float_t kEend = 50000.0;
+ // Ermilova distribution for the delta-ray spectrum
+ Float_t poti = TMath::Log(kPoti);
+ Float_t eEnd = TMath::Log(kEend);
+ fDeltaE = new TF1("deltae",Ermilova,poti,eEnd,0);
+
+ // Identifier of the sensitive volume (drift region)
+ fIdSens = gMC->VolId("UL05");
+
+ // Identifier of the TRD-driftchambers
+ fIdChamber1 = gMC->VolId("UCIO");
+ fIdChamber2 = gMC->VolId("UCIM");
+ fIdChamber3 = gMC->VolId("UCII");
+
+ for (Int_t i = 0; i < 80; i++) printf("*");
+ printf("\n");
+
}
//_____________________________________________________________________________
-void AliTRDv1::StepManager()
+void AliTRDv1::SetSensPlane(Int_t iplane)
{
//
- // Called at every step in the Transition Radiation Detector
- //
- Int_t vol[3];
- Int_t icopy1, icopy5, icopy6, idSens, icSens;
-
- Float_t hits[4];
-
- TClonesArray &lhits = *fHits;
-
- AliMC* pMC = AliMC::GetMC();
-
- // Use only charged tracks and count them only once per volume
- if(pMC->TrackCharge() && pMC->TrackEntering()) {
-
- // Check on sensitive volume
- idSens = pMC->CurrentVol(0,icSens);
-
- // Long sectors
- if ((idSens == fIdSens1) || (idSens == fIdSens2)) {
-
- pMC->CurrentVolOff(1,0,icopy1);
- pMC->CurrentVolOff(5,0,icopy5);
- pMC->CurrentVolOff(6,0,icopy6);
-
- // The sector number
- if ((icopy6 == 1) || (icopy6 == 3))
- vol[0] = icopy5;
- else
- vol[0] = 16 - icopy5;
+ // Defines the hit-sensitive plane (0-5)
+ //
+
+ if ((iplane < 0) || (iplane > 5)) {
+ printf("Wrong input value: %d\n",iplane);
+ printf("Use standard setting\n");
+ fSensPlane = -1;
+ fSensSelect = 0;
+ return;
+ }
+
+ fSensSelect = 1;
+ fSensPlane = iplane;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDv1::SetSensChamber(Int_t ichamber)
+{
+ //
+ // Defines the hit-sensitive chamber (0-4)
+ //
+
+ if ((ichamber < 0) || (ichamber > 4)) {
+ printf("Wrong input value: %d\n",ichamber);
+ printf("Use standard setting\n");
+ fSensChamber = -1;
+ fSensSelect = 0;
+ return;
+ }
+
+ fSensSelect = 1;
+ fSensChamber = ichamber;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDv1::SetSensSector(Int_t isector)
+{
+ //
+ // Defines the hit-sensitive sector (0-17)
+ //
+
+ SetSensSector(isector,1);
+
+}
+
+//_____________________________________________________________________________
+void AliTRDv1::SetSensSector(Int_t isector, Int_t nsector)
+{
+ //
+ // Defines a range of hit-sensitive sectors. The range is defined by
+ // <isector> (0-17) as the starting point and <nsector> as the number
+ // of sectors to be included.
+ //
+
+ if ((isector < 0) || (isector > 17)) {
+ printf("Wrong input value <isector>: %d\n",isector);
+ printf("Use standard setting\n");
+ fSensSector = -1;
+ fSensSectorRange = 0;
+ fSensSelect = 0;
+ return;
+ }
+
+ if ((nsector < 1) || (nsector > 18)) {
+ printf("Wrong input value <nsector>: %d\n",nsector);
+ printf("Use standard setting\n");
+ fSensSector = -1;
+ fSensSectorRange = 0;
+ fSensSelect = 0;
+ return;
+ }
+
+ fSensSelect = 1;
+ fSensSector = isector;
+ fSensSectorRange = nsector;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDv1::StepManager()
+{
+ //
+ // Slow simulator. Every charged track produces electron cluster as hits
+ // along its path across the drift volume. The step size is set acording
+ // to Bethe-Bloch. The energy distribution of the delta electrons follows
+ // a spectrum taken from Ermilova et al.
+ //
+
+ Int_t iIdSens, icSens;
+ Int_t iIdSpace, icSpace;
+ Int_t iIdChamber, icChamber;
+ Int_t pla = 0;
+ Int_t cha = 0;
+ Int_t sec = 0;
+ Int_t iPdg;
+
+ Int_t det[1];
+
+ Float_t hits[4];
+ Float_t random[1];
+ Float_t charge;
+ Float_t aMass;
+
+ Double_t pTot;
+ Double_t qTot;
+ Double_t eDelta;
+ Double_t betaGamma, pp;
+
+ TLorentzVector pos, mom;
+ TClonesArray &lhits = *fHits;
+
+ const Double_t kBig = 1.0E+12;
+
+ // Ionization energy
+ const Float_t kWion = 22.04;
+ // Maximum energy for e+ e- g for the step-size calculation
+ const Float_t kPTotMax = 0.002;
+ // Plateau value of the energy-loss for electron in xenon
+ // taken from: Allison + Comb, Ann. Rev. Nucl. Sci. (1980), 30, 253
+ //const Double_t kPlateau = 1.70;
+ // the averaged value (26/3/99)
+ const Float_t kPlateau = 1.55;
+ // dN1/dx|min for the gas mixture (90% Xe + 10% CO2)
+ const Float_t kPrim = 48.0;
+ // First ionization potential (eV) for the gas mixture (90% Xe + 10% CO2)
+ const Float_t kPoti = 12.1;
+
+ // PDG code electron
+ const Int_t kPdgElectron = 11;
+
+ // Set the maximum step size to a very large number for all
+ // neutral particles and those outside the driftvolume
+ gMC->SetMaxStep(kBig);
+
+ // Use only charged tracks
+ if (( gMC->TrackCharge() ) &&
+ (!gMC->IsTrackStop() ) &&
+ (!gMC->IsTrackDisappeared())) {
+
+ // Inside a sensitive volume?
+ iIdSens = gMC->CurrentVolID(icSens);
+ if (iIdSens == fIdSens) {
+
+ iIdSpace = gMC->CurrentVolOffID(4,icSpace );
+ iIdChamber = gMC->CurrentVolOffID(1,icChamber);
+
+ // Calculate the energy of the delta-electrons
+ eDelta = TMath::Exp(fDeltaE->GetRandom()) - kPoti;
+ eDelta = TMath::Max(eDelta,0.0);
+
+ // The number of secondary electrons created
+ qTot = (Double_t) ((Int_t) (eDelta / kWion) + 1);
+
+ // The hit coordinates and charge
+ gMC->TrackPosition(pos);
+ hits[0] = pos[0];
+ hits[1] = pos[1];
+ hits[2] = pos[2];
+ hits[3] = qTot;
+
+ // The sector number (0 - 17)
+ // The numbering goes clockwise and starts at y = 0
+ Float_t phi = kRaddeg*TMath::ATan2(pos[0],pos[1]);
+ if (phi < 90.)
+ phi = phi + 270.;
+ else
+ phi = phi - 90.;
+ sec = ((Int_t) (phi / 20));
+
+ // The chamber number
+ // 0: outer left
+ // 1: middle left
+ // 2: inner
+ // 3: middle right
+ // 4: outer right
+ if (iIdChamber == fIdChamber1)
+ cha = (hits[2] < 0 ? 0 : 4);
+ else if (iIdChamber == fIdChamber2)
+ cha = (hits[2] < 0 ? 1 : 3);
+ else if (iIdChamber == fIdChamber3)
+ cha = 2;
+
+ // The plane number
+ // The numbering starts at the innermost plane
+ pla = icChamber - TMath::Nint((Float_t) (icChamber / 7)) * 6 - 1;
+
+ // Check on selected volumes
+ Int_t addthishit = 1;
+ if (fSensSelect) {
+ if ((fSensPlane >= 0) && (pla != fSensPlane )) addthishit = 0;
+ if ((fSensChamber >= 0) && (cha != fSensChamber)) addthishit = 0;
+ if (fSensSector >= 0) {
+ Int_t sens1 = fSensSector;
+ Int_t sens2 = fSensSector + fSensSectorRange;
+ sens2 -= ((Int_t) (sens2 / kNsect)) * kNsect;
+ if (sens1 < sens2) {
+ if ((sec < sens1) || (sec >= sens2)) addthishit = 0;
+ }
+ else {
+ if ((sec < sens1) && (sec >= sens2)) addthishit = 0;
+ }
+ }
+ }
+
+ // Add this hit
+ if (addthishit) {
+
+ det[0] = fGeometry->GetDetector(pla,cha,sec);
+ new(lhits[fNhits++]) AliTRDhit(fIshunt
+ ,gAlice->CurrentTrack()
+ ,det
+ ,hits);
+
+ // The energy loss according to Bethe Bloch
+ gMC->TrackMomentum(mom);
+ pTot = mom.Rho();
+ iPdg = TMath::Abs(gMC->TrackPid());
+ if ( (iPdg != kPdgElectron) ||
+ ((iPdg == kPdgElectron) && (pTot < kPTotMax))) {
+ aMass = gMC->TrackMass();
+ betaGamma = pTot / aMass;
+ pp = kPrim * BetheBloch(betaGamma);
+ // Take charge > 1 into account
+ charge = gMC->TrackCharge();
+ if (TMath::Abs(charge) > 1) pp = pp * charge*charge;
+ }
+ // Electrons above 20 Mev/c are at the plateau
+ else {
+ pp = kPrim * kPlateau;
+ }
- // The chamber number
- if (idSens == fIdSens2) {
- if (icopy6 < 3)
- vol[1] = 4;
- else
- vol[1] = 1;
- }
+ // Calculate the maximum step size for the next tracking step
+ if (pp > 0) {
+ do
+ gMC->Rndm(random,1);
+ while ((random[0] == 1.) || (random[0] == 0.));
+ gMC->SetMaxStep( - TMath::Log(random[0]) / pp);
+ }
+
+ }
else {
- if (icopy6 < 3)
- vol[1] = 3;
- else
- vol[1] = 2;
+ // set step size to maximal value
+ gMC->SetMaxStep(kBig);
}
-
- // The plane number
- vol[2] = icopy1;
-
- pMC->TrackPosition(hits);
- hits[3] = 0;
-
- new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
-
+
}
- // Short sectors
- else if (idSens == fIdSens3) {
-
- pMC->CurrentVolOff(1,0,icopy1);
- pMC->CurrentVolOff(5,0,icopy5);
- pMC->CurrentVolOff(6,0,icopy6);
-
- // The sector number
- vol[0] = icopy5 + 5;
-
- // The chamber number
- if (icopy6 == 1)
- vol[1] = 4;
- else
- vol[1] = 1;
-
- // The plane number
- vol[2] = icopy1;
-
- pMC->TrackPosition(hits);
- hits[3] = 0;
-
- new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
-
- }
+
+ }
+
+}
+
+//_____________________________________________________________________________
+Double_t AliTRDv1::BetheBloch(Double_t bg)
+{
+ //
+ // Parametrization of the Bethe-Bloch-curve
+ // The parametrization is the same as for the TPC and is taken from Lehrhaus.
+ //
+
+ // This parameters have been adjusted to averaged values from GEANT
+ const Double_t kP1 = 7.17960e-02;
+ const Double_t kP2 = 8.54196;
+ const Double_t kP3 = 1.38065e-06;
+ const Double_t kP4 = 5.30972;
+ const Double_t kP5 = 2.83798;
+
+ // This parameters have been adjusted to Xe-data found in:
+ // Allison & Cobb, Ann. Rev. Nucl. Sci. (1980), 30, 253
+ //const Double_t kP1 = 0.76176E-1;
+ //const Double_t kP2 = 10.632;
+ //const Double_t kP3 = 3.17983E-6;
+ //const Double_t kP4 = 1.8631;
+ //const Double_t kP5 = 1.9479;
+
+ if (bg > 0) {
+ Double_t yy = bg / TMath::Sqrt(1. + bg*bg);
+ Double_t aa = TMath::Power(yy,kP4);
+ Double_t bb = TMath::Power((1./bg),kP5);
+ bb = TMath::Log(kP3 + bb);
+ return ((kP2 - aa - bb)*kP1 / aa);
+ }
+ else
+ return 0;
+
+}
+
+//_____________________________________________________________________________
+Double_t Ermilova(Double_t *x, Double_t *)
+{
+ //
+ // Calculates the delta-ray energy distribution according to Ermilova.
+ // Logarithmic scale !
+ //
+
+ Double_t energy;
+ Double_t dpos;
+ Double_t dnde;
+
+ Int_t pos1, pos2;
+
+ const Int_t kNv = 31;
+
+ Float_t vxe[kNv] = { 2.3026, 2.9957, 3.4012, 3.6889, 3.9120
+ , 4.0943, 4.2485, 4.3820, 4.4998, 4.6052
+ , 4.7005, 5.0752, 5.2983, 5.7038, 5.9915
+ , 6.2146, 6.5221, 6.9078, 7.3132, 7.6009
+ , 8.0064, 8.5172, 8.6995, 8.9872, 9.2103
+ , 9.4727, 9.9035,10.3735,10.5966,10.8198
+ ,11.5129 };
+
+ Float_t vye[kNv] = { 80.0 , 31.0 , 23.3 , 21.1 , 21.0
+ , 20.9 , 20.8 , 20.0 , 16.0 , 11.0
+ , 8.0 , 6.0 , 5.2 , 4.6 , 4.0
+ , 3.5 , 3.0 , 1.4 , 0.67 , 0.44
+ , 0.3 , 0.18 , 0.12 , 0.08 , 0.056
+ , 0.04 , 0.023, 0.015, 0.011, 0.01
+ , 0.004 };
+
+ energy = x[0];
+
+ // Find the position
+ pos1 = pos2 = 0;
+ dpos = 0;
+ do {
+ dpos = energy - vxe[pos2++];
}
+ while (dpos > 0);
+ pos2--;
+ if (pos2 > kNv) pos2 = kNv;
+ pos1 = pos2 - 1;
+
+ // Differentiate between the sampling points
+ dnde = (vye[pos1] - vye[pos2]) / (vxe[pos2] - vxe[pos1]);
+
+ return dnde;
+
}
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