X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=FMD%2FAliFMDv1.cxx;h=386115768af1796f25089eb21ebb0a78d6fabf5b;hb=808ba0dbe2751ca45033570dc30ba93a7d39ddfa;hp=89d3dd71ebbddcd4e9b5540def488d108a8e4e14;hpb=925e65709851bc55cacc40068515d4c5a80fc419;p=u%2Fmrichter%2FAliRoot.git diff --git a/FMD/AliFMDv1.cxx b/FMD/AliFMDv1.cxx index 89d3dd71ebb..386115768af 100644 --- a/FMD/AliFMDv1.cxx +++ b/FMD/AliFMDv1.cxx @@ -12,66 +12,209 @@ * 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 + @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. +// #include // ROOT_TVirtualMC #include // ALIRUN_H #include // ALIMC_H -#include // ALILOG_H +// #include // 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 +#include +#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() { - // - // 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: // @@ -99,109 +242,91 @@ AliFMDv1::StepManager() // - Create a hit // - ENDIF // - // - AliDebug(10, Form("Is inside %s", gMC->CurrentVolName())); - - // 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; Int_t copy; - Int_t volumeId = gMC->CurrentVolID(copy); - // The ring ID is encoded in the volume name - Char_t ring = '\0'; - if (volumeId == fInner->GetStripId()) ring = 'I'; - else if (volumeId == fOuter->GetStripId()) ring = 'O'; - else return; - - // Get the strip number. Note, that GEANT numbers divisions from 1, - // so we subtract one - Int_t strip = copy - 1; - - // 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; - - - // 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 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); - - AliDebug(2, Form("Is inside FMD%d%c[%02d,%03d]: particle is %s", - detector, ring, sector, strip, - (entering ? "entering" : - (inside ? "inside" : - "exiting")))); - + 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; } }