* 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 5 Si volumes covered pseudorapidity interval
-// from 1.7 to 5.1.
-//
+// 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.
//
-// The actual code is done by various separate classes. Below is
-// diagram showing the relationship between the various FMD classes
-// that handles the geometry
-//
-//
-// +----------+ +----------+
-// | AliFMDv1 | | AliFMDv1 |
-// +----------+ +----------+
-// | |
-// +----+--------------+
-// |
-// | +------------+ 1 +---------------+
-// | +- | AliFMDRing |<>--| AliFMDPolygon |
-// V 2 | +------------+ +---------------+
-// +--------+<>--+ |
-// | AliFMD | ^
-// +--------+<>--+ V 1..2
-// 3 | +-------------------+
-// +-| AliFMDSubDetector |
-// +-------------------+
-// ^
-// |
-// +-------------+-------------+
-// | | |
-// +---------+ +---------+ +---------+
-// | AliFMD1 | | AliFMD2 | | AliFMD3 |
-// +---------+ +---------+ +---------+
-//
-//
// See also the class AliFMD for a more detailed explanation of the
// various componets.
-#ifndef ROOT_TVirtualMC
-# include <TVirtualMC.h>
-#endif
-#ifndef ALIFMDV1_H
-# include "AliFMDv1.h"
-#endif
-#ifndef ALIRUN_H
-# include "AliRun.h"
-#endif
-#ifndef ALIMC_H
-# include "AliMC.h"
+//
+#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
-#ifndef ALILOG_H
-# include "AliLog.h"
+
+
+//____________________________________________________________________
+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;
+}
+
//____________________________________________________________________
-ClassImp(AliFMDv1);
+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()
{
- //
- // Called for every step in the Forward Multiplicity Detector
+ // 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:
//
// - Create a hit
// - ENDIF
//
- //
- // DebugGuard guard("AliFMDv1::StepManager");
- AliDebug(10, "AliFMDv1::StepManager");
- // return;
-
- // If the track is gone, return
- if (!gMC->IsTrackAlive()) return;
+ TVirtualMC* mc = TVirtualMC::GetMC();
+ if (!mc->IsTrackAlive()) return;
+ Double_t absQ = TMath::Abs(mc->TrackCharge());
+ if (absQ <= 0) return;
- // Only process charged particles
- if(TMath::Abs(gMC->TrackCharge()) <= 0) return;
-
- // Only do stuff is the track is in one of the strips.
- TString vol(gMC->CurrentVolName());
- if (!vol.Contains("STR")) return;
-
-
- // Get the strip number. Note, that GEANT numbers divisions from 1,
- // so we subtract one
- Int_t strip;
- gMC->CurrentVolID(strip);
- strip--;
-
- // Get the phi division of the module
- Int_t phiDiv; // * The phi division number (1 or 2)
- gMC->CurrentVolOffID(1, phiDiv); // in the module
-
- // Active volume number - not used.
- // Int_t active;
- // gMC->CurrentVolOffID(2, active);
-
- // Get the module number in the ring.
- Int_t module;
- gMC->CurrentVolOffID(3, module);
-
- // Ring copy number - the same as the detector number - not used
- // Int_t ringCopy; // * Ring copy number
- // gMC->CurrentVolOffID(4, ringCopy); // Same as detector number
-
- // Get the detector number from the path name
- Int_t detector = Int_t((gMC->CurrentVolOffName(5)[3]) - 48);
-
- // The sector number, calculated from module and phi division #
- Int_t sector = 2 * module + phiDiv - 1;
-
- // The ring ID is encoded in the volume name
- Char_t ring = vol[3];
-
- // Get a pointer to the sub detector structure
- AliFMDSubDetector* det = 0;
- switch (detector) {
- case 1: det = fFMD1; break;
- case 2: det = fFMD2; break;
- case 3: det = fFMD3; break;
+ 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;
}
- if (!det) return;
-
- // Get the current track position
TLorentzVector v;
- gMC->TrackPosition(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 isWithin = det->CheckHit(ring, module, v.X(), v.Y());
- Bool_t entering = gMC->IsTrackEntering() && isWithin;
- Bool_t inside = gMC->IsTrackInside() && isWithin;
- Bool_t out = (gMC->IsTrackExiting()
- || gMC->IsTrackDisappeared()
- || gMC->IsTrackStop()
- || !isWithin);
-// Reset the energy deposition for this track, and update some of
+ 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) {
- fCurrentDeltaE = 0;
-
- // Get production vertex and momentum of the track
- fCurrentV = v;
- gMC->TrackMomentum(fCurrentP);
- fCurrentPdg = gMC->IdFromPDG(gMC->TrackPid());
-
- // if (fAnalyser)
- // fAnalyser->Update(detector, ring, isWithin, v.X(), v.Y());
+ 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 += 1000 * gMC->Edep();
-
+ 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 && fCurrentDeltaE >= 0) {
- fCurrentDeltaE += 1000 * gMC->Edep();
-
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),
- detector, ring, sector, strip,
- fCurrentV.X(), fCurrentV.Y(), fCurrentV.Z(),
- fCurrentP.X(), fCurrentP.Y(), fCurrentP.Z(),
- fCurrentDeltaE, fCurrentPdg, fCurrentV.T());
+ 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;
}
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff