+++ /dev/null
-/**************************************************************************
- * 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. *
- **************************************************************************/
-/* $Id$ */
-/** @file AliFMDv1.cxx
- @author Christian Holm Christensen <cholm@nbi.dk>
- @date Mon Mar 27 12:48:51 2006
- @brief Concrete implementation of FMD detector driver - detailed
- version
- @ingroup FMD_sim
-*/
-//____________________________________________________________________
-//
-// Forward Multiplicity Detector based on Silicon wafers. This class
-// contains the base procedures for the Forward Multiplicity detector
-// Detector consists of 3 sub-detectors FMD1, FMD2, and FMD3, each of
-// which has 1 or 2 rings of silicon sensors.
-// This class contains the detailed version of the FMD - that is, hits
-// are produced during simulation.
-//
-// See also the class AliFMD for a more detailed explanation of the
-// various componets.
-//
-#include <TVirtualMC.h> // ROOT_TVirtualMC
-#include <AliRun.h> // ALIRUN_H
-#include <AliMC.h> // ALIMC_H
-// #include <AliLog.h> // ALILOG_H
-#include "AliFMDDebug.h" // Better debug macros
-#include "AliFMDv1.h" // ALIFMDV1_H
-// #include "AliFMDGeometryBuilder.h"
-#include "AliFMDGeometry.h"
-#include "AliFMDDetector.h"
-#include "AliFMDRing.h"
-#include <TParticlePDG.h>
-#include <TDatabasePDG.h>
-#include "AliFMDHit.h"
-
-//____________________________________________________________________
-ClassImp(AliFMDv1)
-#if 0
- ; // This is here to keep Emacs for indenting the next line
-#endif
-
-
-//____________________________________________________________________
-Bool_t
-AliFMDv1::VMC2FMD(TLorentzVector& v, UShort_t& detector,
- Char_t& ring, UShort_t& sector, UShort_t& strip) const
-{
- // Convert VMC coordinates to detector coordinates
- TVirtualMC* mc = TVirtualMC::GetMC();
- AliFMDGeometry* fmd = AliFMDGeometry::Instance();
-
- // Get track position
- mc->TrackPosition(v);
- Int_t moduleno; mc->CurrentVolOffID(fmd->GetModuleOff(), moduleno);
- Int_t iring; mc->CurrentVolOffID(fmd->GetRingOff(), iring);
- ring = Char_t(iring);
- Int_t det; mc->CurrentVolOffID(fmd->GetDetectorOff(), det);
- detector = det;
-
-
- // Get the ring geometry
- //Int_t nsec = fmd->GetDetector(detector)->GetRing(ring)->GetNSectors();
- Int_t nstr = fmd->GetDetector(detector)->GetRing(ring)->GetNStrips();
- Double_t lowr = fmd->GetDetector(detector)->GetRing(ring)->GetMinR();
- Double_t theta = fmd->GetDetector(detector)->GetRing(ring)->GetTheta();
- Double_t pitch = fmd->GetDetector(detector)->GetRing(ring)->GetPitch();
-
- // Figure out the strip number
- Double_t r = TMath::Sqrt(v.X() * v.X() + v.Y() * v.Y());
- Int_t str = Int_t((r - lowr) / pitch);
- if (str < 0 || str >= nstr) return kFALSE;
- strip = str;
-
- // Figure out the sector number
- Double_t phi = TMath::ATan2(v.Y(), v.X()) * 180. / TMath::Pi();
- if (phi < 0) phi = 360. + phi;
- Double_t t = phi - 2 * moduleno * theta;
- sector = 2 * moduleno;
- if (t < 0 || t > 2 * theta) return kFALSE;
- else if (t > theta) sector += 1;
-
- AliFMDDebug(40, ("<1> Inside an active FMD volume FMD%d%c[%2d,%3d] %s",
- detector, ring, sector, strip, mc->CurrentVolPath()));
- return kTRUE;
-}
-
-//____________________________________________________________________
-Bool_t
-AliFMDv1::VMC2FMD(Int_t copy, TLorentzVector& v,
- UShort_t& detector, Char_t& ring,
- UShort_t& sector, UShort_t& strip) const
-{
- // Convert VMC coordinates to detector coordinates
- TVirtualMC* mc = TVirtualMC::GetMC();
- AliFMDGeometry* fmd = AliFMDGeometry::Instance();
-
- strip = copy - 1;
- Int_t sectordiv; mc->CurrentVolOffID(fmd->GetSectorOff(), sectordiv);
- if (fmd->GetModuleOff() >= 0) {
- Int_t module; mc->CurrentVolOffID(fmd->GetModuleOff(), module);
- sector = 2 * module + sectordiv;
- }
- else
- sector = sectordiv;
- AliFMDDebug(30, ("Getting ring volume with offset %d -> %s",
- fmd->GetRingOff(),
- mc->CurrentVolOffName(fmd->GetRingOff())));
- Int_t iring; mc->CurrentVolOffID(fmd->GetRingOff(), iring);
- ring = Char_t(iring);
- Int_t det; mc->CurrentVolOffID(fmd->GetDetectorOff(), det);
- detector = det;
-
- //Double_t rz = fmd->GetDetector(detector)->GetRingZ(ring);
- AliFMDDetector* gdet = fmd->GetDetector(detector);
- AliFMDRing* gring = gdet->GetRing(ring);
- if (!gring) {
- AliFatal(Form("Ring %c not found (volume was %s at offset %d in path %s)",
- ring,
- mc->CurrentVolOffName(fmd->GetRingOff()),
- fmd->GetRingOff(),
- mc->CurrentVolPath()));
- }
- Int_t n = gring->GetNSectors();
-#if 0
- if (rz < 0) {
- Int_t s = ((n - sector + n / 2) % n) + 1;
- AliFMDDebug(1, ("Recalculating sector to %d (=%d-%d+%d/2%%%d+1 z=%f)",
- s, n, sector, n, n, rz));
- sector = s;
- }
-#endif
- if (sector < 1 || sector > n) {
- AliWarning(Form("sector # %d out of range (0-%d)", sector-1, n-1));
- return kFALSE;
- }
- sector--;
- // Get track position
- mc->TrackPosition(v);
- AliFMDDebug(40, ("<2> Inside an active FMD volume FMD%d%c[%2d,%3d] %s",
- detector, ring, sector, strip, mc->CurrentVolPath()));
-
- return kTRUE;
-}
-
-
-//____________________________________________________________________
-Bool_t
-AliFMDv1::CheckHit(Int_t trackno, Int_t pdg, Float_t absQ,
- const TLorentzVector& p, Float_t edep) const
-{
- // Check that a hit is good
- if (AliLog::GetDebugLevel("FMD", "AliFMD") < 5) return kFALSE;
- TVirtualMC* mc = TVirtualMC::GetMC();
- Double_t mass = mc->TrackMass();
- Double_t poverm = (mass == 0 ? 0 : p.P() / mass);
-
- // This `if' is to debug abnormal energy depositions. We trigger on
- // p/m approx larger than or equal to a MIP, and a large edep - more
- // than 1 keV - a MIP is 100 eV.
- if (!(edep > absQ * absQ && poverm > 1)) return kFALSE;
-
- TArrayI procs;
- mc->StepProcesses(procs);
- TString processes;
- for (Int_t ip = 0; ip < procs.fN; ip++) {
- if (ip != 0) processes.Append(",");
- processes.Append(TMCProcessName[procs.fArray[ip]]);
- }
- TDatabasePDG* pdgDB = TDatabasePDG::Instance();
- TParticlePDG* particleType = pdgDB->GetParticle(pdg);
- TString pname(particleType ? particleType->GetName() : "???");
- TString what;
- if (mc->IsTrackEntering()) what.Append("entering ");
- if (mc->IsTrackExiting()) what.Append("exiting ");
- if (mc->IsTrackInside()) what.Append("inside ");
- if (mc->IsTrackDisappeared()) what.Append("disappeared ");
- if (mc->IsTrackStop()) what.Append("stopped ");
- if (mc->IsNewTrack()) what.Append("new ");
- if (mc->IsTrackAlive()) what.Append("alive ");
- if (mc->IsTrackOut()) what.Append("out ");
-
- Int_t mother = gAlice->GetMCApp()->GetPrimary(trackno);
- AliFMDDebug(15, ("Track # %5d deposits a lot of energy\n"
- " Volume: %s\n"
- " Momentum: (%7.4f,%7.4f,%7.4f)\n"
- " PDG: %d (%s)\n"
- " Edep: %-14.7f keV (mother %d)\n"
- " p/m: %-7.4f/%-7.4f = %-14.7f\n"
- " Processes: %s\n"
- " What: %s\n",
- trackno, mc->CurrentVolPath(), p.X(), p.Y(), p.Z(),
- pdg, pname.Data(), edep, mother, p.P(), mass,
- poverm, processes.Data(), what.Data()));
- return kTRUE;
-}
-
-
-//____________________________________________________________________
-void
-AliFMDv1::StepManager()
-{
- // Member function that is executed each time a hit is made in the
- // FMD. None-charged particles are ignored. Dead tracks are
- // ignored.
- //
- // The procedure is as follows:
- //
- // - IF NOT track is alive THEN RETURN ENDIF
- // - IF NOT particle is charged THEN RETURN ENDIF
- // - IF NOT volume name is "STRI" or "STRO" THEN RETURN ENDIF
- // - Get strip number (volume copy # minus 1)
- // - Get phi division number (mother volume copy #)
- // - Get module number (grand-mother volume copy #)
- // - section # = 2 * module # + phi division # - 1
- // - Get ring Id from volume name
- // - Get detector # from grand-grand-grand-mother volume name
- // - Get pointer to sub-detector object.
- // - Get track position
- // - IF track is entering volume AND track is inside real shape THEN
- // - Reset energy deposited
- // - Get track momentum
- // - Get particle ID #
- /// - ENDIF
- // - IF track is inside volume AND inside real shape THEN
- /// - Update energy deposited
- // - ENDIF
- // - IF track is inside real shape AND (track is leaving volume,
- // or it died, or it is stopped THEN
- // - Create a hit
- // - ENDIF
- //
- TVirtualMC* mc = TVirtualMC::GetMC();
- if (!mc->IsTrackAlive()) return;
- Double_t absQ = TMath::Abs(mc->TrackCharge());
- if (absQ <= 0) return;
-
- Int_t copy;
- Int_t vol = mc->CurrentVolID(copy);
- AliFMDGeometry* fmd = AliFMDGeometry::Instance();
- if (!fmd->IsActive(vol)) {
- AliFMDDebug(50, ("Not an FMD volume %d '%s'",vol,mc->CurrentVolName()));
- return;
- }
- TLorentzVector v;
- UShort_t detector;
- Char_t ring;
- UShort_t sector;
- UShort_t strip;
-
- if (fmd->IsDetailed()) {
- if (!VMC2FMD(copy, v, detector, ring, sector, strip)) return;
- } else {
- if (!VMC2FMD(v, detector, ring, sector, strip)) return;
- }
- TLorentzVector p;
- mc->TrackMomentum(p);
- Int_t trackno = gAlice->GetMCApp()->GetCurrentTrackNumber();
- Int_t pdg = mc->TrackPid();
- Double_t edep = mc->Edep() * 1000; // keV
- Bool_t isBad = CheckHit(trackno, pdg, absQ, p, edep);
-
- // Check that the track is actually within the active area
- Bool_t entering = mc->IsTrackEntering();
- Bool_t inside = mc->IsTrackInside();
- Bool_t out = (mc->IsTrackExiting()|| mc->IsTrackDisappeared()||
- mc->IsTrackStop());
- // Reset the energy deposition for this track, and update some of
- // our parameters.
- if (entering) {
- AliFMDDebug(15, ("Track # %8d entering active FMD volume %s: "
- "Edep=%f (%f,%f,%f)", trackno, mc->CurrentVolPath(),
- edep, v.X(), v.Y(), v.Z()));
- fCurrentP = p;
- fCurrentV = v;
- fCurrentDeltaE = edep;
- fCurrentPdg = pdg; // mc->IdFromPDG(pdg);
- }
- // If the track is inside, then update the energy deposition
- if (inside && fCurrentDeltaE >= 0) {
- fCurrentDeltaE += edep;
- AliFMDDebug(15, ("Track # %8d inside active FMD volume %s: Edep=%f, "
- "Accumulated Edep=%f (%f,%f,%f)", trackno,
- mc->CurrentVolPath(), edep, fCurrentDeltaE,
- v.X(), v.Y(), v.Z()));
- }
- // The track exits the volume, or it disappeared in the volume, or
- // the track is stopped because it no longer fulfills the cuts
- // defined, then we create a hit.
- if (out) {
- if (fCurrentDeltaE >= 0) {
- fCurrentDeltaE += edep;
- AliFMDDebug(15, ("Track # %8d exiting active FMD volume %s: Edep=%g, "
- "Accumulated Edep=%g (%f,%f,%f)", trackno,
- mc->CurrentVolPath(), edep, fCurrentDeltaE,
- v.X(), v.Y(), v.Z()));
- TVector3 cur(v.Vect());
- cur -= fCurrentV.Vect();
- Double_t len = cur.Mag();
- AliFMDHit* h =
- AddHitByFields(trackno, detector, ring, sector, strip,
- fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(),
- fCurrentP.X(), fCurrentP.Y(), fCurrentP.Z(),
- fCurrentDeltaE, fCurrentPdg, fCurrentV.T(),
- len, mc->IsTrackDisappeared()||mc->IsTrackStop());
- // Add a copy
- if (isBad && fBad) {
- new ((*fBad)[fBad->GetEntries()]) AliFMDHit(*h);
- }
- // Check the geometry that we can get back the coordinates.
-#ifdef CHECK_TRANS
- Double_t x, y, z;
- fmd->Detector2XYZ(detector, ring, sector, strip, x, y ,z);
- AliFMDDebug(1, ("Hit at (%f,%f,%f), geometry says (%f,%f,%f)",
- fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(), x, y, z));
-#endif
- }
- fCurrentDeltaE = -1;
- }
-}
-//___________________________________________________________________
-//
-// EOF
-//
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff