/************************************************************************** * 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. * **************************************************************************/ /* $Id$ */ /////////////////////////////////////////////////////////////////////////////// // // // Transition Radiation Detector // // This class contains the basic functions for the Transition Radiation // // Detector. // // // /////////////////////////////////////////////////////////////////////////////// #include #include #include #include "AliMC.h" #include "AliMagF.h" #include "AliRun.h" #include "AliLoader.h" #include "AliTRD.h" #include "AliTRDdigitizer.h" #include "AliTRDdigitsManager.h" #include "AliTRDgeometry.h" #include "AliTRDhit.h" #include "AliTRDrawData.h" #include "AliTRDCommonParam.h" ClassImp(AliTRD) //_____________________________________________________________________________ AliTRD::AliTRD() :AliDetector() ,fGeometry(0) ,fGasDensity(0) ,fFoilDensity(0) ,fGasNobleFraction(0) ,fPrimaryIonisation(0) { // // Default constructor // } //_____________________________________________________________________________ AliTRD::AliTRD(const char *name, const char *title) :AliDetector(name,title) ,fGeometry(0) ,fGasDensity(0) ,fFoilDensity(0) ,fGasNobleFraction(0) ,fPrimaryIonisation(0) { // // Standard constructor for the TRD // // Check that FRAME is there otherwise we have no place where to put TRD AliModule *frame = gAlice->GetModule("FRAME"); if (!frame) { AliError("TRD needs FRAME to be present\n"); exit(1); } // Define the TRD geometry if ((frame->IsVersion() == 0) || (frame->IsVersion() == 1)) { fGeometry = new AliTRDgeometry(); } else { AliError("Could not find valid FRAME version\n"); exit(1); } // Allocate the hit array fHits = new TClonesArray("AliTRDhit",405); gAlice->GetMCApp()->AddHitList(fHits); } //_____________________________________________________________________________ AliTRD::~AliTRD() { // // TRD destructor // if (fGeometry) { delete fGeometry; fGeometry = 0; } if (fHits) { delete fHits; fHits = 0; } } //_____________________________________________________________________________ void AliTRD::Hits2Digits() { // // Create digits // AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class"); AliLog::SetClassDebugLevel("TRDdigitizer",AliDebugLevel()); // Initialization digitizer.InitDetector(); if (!fLoader->TreeH()) { fLoader->LoadHits("read"); } fLoader->LoadDigits("recreate"); AliRunLoader *runLoader = fLoader->GetRunLoader(); for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) { runLoader->GetEvent(iEvent); digitizer.Open(runLoader,iEvent); digitizer.MakeDigits(); digitizer.WriteDigits(); } fLoader->UnloadHits(); fLoader->UnloadDigits(); } //_____________________________________________________________________________ void AliTRD::Hits2SDigits() { // // Create summable digits // AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class"); // For the summable digits digitizer.SetSDigits(kTRUE); AliLog::SetClassDebugLevel("TRDdigitizer",AliDebugLevel()); // Initialization digitizer.InitDetector(); if (!fLoader->TreeH()) { fLoader->LoadHits("read"); } fLoader->LoadSDigits("recreate"); AliRunLoader *runLoader = fLoader->GetRunLoader(); for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) { runLoader->GetEvent(iEvent); digitizer.Open(runLoader,iEvent); digitizer.MakeDigits(); digitizer.WriteDigits(); } fLoader->UnloadHits(); fLoader->UnloadSDigits(); } //_____________________________________________________________________________ AliDigitizer *AliTRD::CreateDigitizer(AliDigitizationInput* digInput) const { // // Creates a new digitizer object // return new AliTRDdigitizer(digInput); } //_____________________________________________________________________________ void AliTRD::SDigits2Digits() { // // Create final digits from summable digits // // Create the TRD digitizer AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class"); AliLog::SetClassDebugLevel("TRDdigitizer",AliDebugLevel()); // Set the parameter digitizer.SetEvent(gAlice->GetEvNumber()); // Initialization digitizer.InitDetector(); // Read the s-digits via digits manager AliTRDdigitsManager sdigitsManager; AliLog::SetClassDebugLevel("TRDdigitisManager",AliDebugLevel()); sdigitsManager.SetSDigits(kTRUE); sdigitsManager.CreateArrays(); if (!fLoader->TreeS()) { if (fLoader->LoadSDigits("read")) { return; } } if (!fLoader->TreeS()) { AliError(Form("Error while reading SDigits for event %d",gAlice->GetEvNumber())); return; } sdigitsManager.ReadDigits(fLoader->TreeS()); // Add the s-digits to the input list digitizer.AddSDigitsManager(&sdigitsManager); // Convert the s-digits to normal digits digitizer.SDigits2Digits(); // Store the digits if (!fLoader->TreeD()) { fLoader->MakeTree("D"); } if (digitizer.MakeBranch(fLoader->TreeD())){ digitizer.WriteDigits(); } } //_____________________________________________________________________________ void AliTRD::Digits2Raw() { // // Convert digits of the current event to raw data // fLoader->LoadDigits(); TTree *digits = fLoader->TreeD(); if (!digits) { AliError("No digits tree"); return; } AliTRDrawData rawWriter; if (!rawWriter.Digits2Raw(digits)) { AliError("The raw writer could not load the digits tree"); } fLoader->UnloadDigits(); } //_____________________________________________________________________________ void AliTRD::AddHit(Int_t track, Int_t det, Float_t *hits, Int_t q , Float_t time, Bool_t inDrift) { // // Add a hit for the TRD // TClonesArray &lhits = *fHits; AliTRDhit *hit = new(lhits[fNhits++]) AliTRDhit(fIshunt ,track ,det ,hits ,q ,time); if (inDrift) { hit->SetDrift(); } else { hit->SetAmplification(); } if (q < 0) { hit->SetTRphoton(); } } //_____________________________________________________________________________ void AliTRD::CreateGeometry() { // // Creates the volumes for the TRD chambers // // Check that FRAME is there otherwise we have no place where to put the TRD AliModule *frame = gAlice->GetModule("FRAME"); if (!frame) { AliFatal("The TRD needs the FRAME to be defined first"); } fGeometry->CreateGeometry(fIdtmed->GetArray() - 1299); } //_____________________________________________________________________________ void AliTRD::CreateMaterials() { // // Create the materials for the TRD // Int_t isxfld = ((AliMagF *) TGeoGlobalMagField::Instance()->GetField())->Integ(); Float_t sxmgmx = ((AliMagF *) TGeoGlobalMagField::Instance()->GetField())->Max(); ////////////////////////////////////////////////////////////////////////// // Define Materials ////////////////////////////////////////////////////////////////////////// // Aluminum AliMaterial( 1,"Al", 26.98, 13.0, 2.7, 8.9, 37.2); // Copper AliMaterial( 2,"Cu", 63.54, 29.0, 8.96, 1.43, 14.8); // Carbon AliMaterial( 3,"C" , 12.01, 6.0, 2.265, 18.8, 74.4); // Carbon for fiber mats AliMaterial( 4,"C2", 12.01, 6.0, 1.75, 18.8, 74.4); // Zinc AliMaterial( 5,"Sn", 118.71, 50.0, 7.31, 1.21, 14.8); // Silicon AliMaterial( 6,"Si", 28.09, 14.0, 2.33, 9.36, 37.2); // Iron AliMaterial( 7,"Fe", 55.85, 26.0, 7.87, 1.76, 14.8); // Air Float_t aAir[4] = { 12.011 , 14.0 , 15.9994 , 36.0 }; Float_t zAir[4] = { 6.0 , 7.0 , 8.0 , 18.0 }; Float_t wAir[4] = { 0.000124, 0.755267, 0.231781, 0.012827 }; Float_t dAir = 1.20479e-03; AliMixture(51,"Air", aAir, zAir, dAir, 4, wAir ); // Polyethilene (CH2) Float_t ape[2] = { 12.011 , 1.0079 }; Float_t zpe[2] = { 6.0 , 1.0 }; Float_t wpe[2] = { 1.0 , 2.0 }; Float_t dpe = 0.95; AliMixture(52,"Polyethilene", ape, zpe, dpe, -2, wpe ); // Gas mixtures // Xe/CO2-gas-mixture (85% / 15%) Float_t aXeCO2[3] = { 131.29 , 12.0107 , 15.9994 }; Float_t zXeCO2[3] = { 54.0 , 6.0 , 8.0 }; Float_t wXeCO2[3] = { 8.5 , 1.5 , 3.0 }; Float_t fxc = 0.85; Float_t dxe = 0.00549; // at 20C Float_t dco = 0.00186; // at 20C Float_t dgmXe = fxc * dxe + (1.0 - fxc) * dco; // Ar/CO2-gas-mixture Float_t aArCO2[3] = { 39.948 , 12.0107 , 15.9994 }; Float_t zArCO2[3] = { 18.0 , 6.0 , 8.0 }; Float_t wArCO2[3] = { 8.2 , 1.8 , 3.6 }; Float_t fac = 0.82; Float_t dar = 0.00166; // at 20C Float_t dgmAr = fac * dar + (1.0 - fac) * dco; if (AliTRDCommonParam::Instance()->IsXenon()) { AliMixture(53,"XeCO2", aXeCO2, zXeCO2, dgmXe, -3, wXeCO2); } else if (AliTRDCommonParam::Instance()->IsArgon()) { AliInfo("Gas mixture: Ar C02 (80/20)"); AliMixture(53,"ArCO2", aArCO2, zArCO2, dgmAr, -3, wArCO2); } else { AliFatal("Wrong gas mixture"); exit(1); } // G10 Float_t aG10[4] = { 1.0079, 12.011 , 15.9994, 28.086 }; Float_t zG10[4] = { 1.0 , 6.0 , 8.0 , 14.0 }; Float_t wG10[4] = { 0.023 , 0.194 , 0.443 , 0.340 }; Float_t dG10 = 2.0; AliMixture(54,"G10", aG10, zG10, dG10, 4,wG10 ); // Water Float_t awa[2] = { 1.0079, 15.9994 }; Float_t zwa[2] = { 1.0 , 8.0 }; Float_t wwa[2] = { 2.0 , 1.0 }; Float_t dwa = 1.0; AliMixture(55,"Water", awa, zwa, dwa, -2,wwa ); // Rohacell (C5H8O2), X0 = 535.005cm Float_t arh[3] = { 12.011 , 1.0079, 15.9994 }; Float_t zrh[3] = { 6.0 , 1.0 , 8.0 }; Float_t wrh[3] = { 5.0 , 8.0 , 2.0 }; Float_t drh = 0.075; AliMixture(56,"Rohacell", arh, zrh, drh, -3,wrh ); // Epoxy (C18H19O3) Float_t aEpoxy[3] = { 15.9994, 1.0079, 12.011 }; Float_t zEpoxy[3] = { 8.0 , 1.0 , 6.0 }; Float_t wEpoxy[3] = { 3.0 , 19.0 , 18.0 }; Float_t dEpoxy = 1.8 ; AliMixture(57,"Epoxy", aEpoxy,zEpoxy,dEpoxy,-3,wEpoxy); // Araldite, low density epoxy (C18H19O3) Float_t aAral[3] = { 15.9994, 1.0079, 12.011 }; Float_t zAral[3] = { 8.0 , 1.0 , 6.0 }; Float_t wAral[3] = { 3.0 , 19.0 , 18.0 }; Float_t dAral = 1.12; // Hardener: 1.15, epoxy: 1.1, mixture: 1/2 AliMixture(58,"Araldite", aAral, zAral, dAral, -3,wAral ); // Mylar Float_t aMy[3] = { 12.011 , 1.0 , 15.9994 }; Float_t zMy[3] = { 6.0 , 1.0 , 8.0 }; Float_t wMy[3] = { 5.0 , 4.0 , 2.0 }; Float_t dMy = 1.39; AliMixture(59,"Mylar", aMy, zMy, dMy, -3,wMy ); // Polypropylene (C3H6) for radiator fibers Float_t app[2] = { 12.011 , 1.0079 }; Float_t zpp[2] = { 6.0 , 1.0 }; Float_t wpp[2] = { 3.0 , 6.0 }; Float_t dpp = 0.068; AliMixture(60,"Polypropylene",app, zpp, dpp, -2,wpp ); // Aramide for honeycomb Float_t aAra[4] = { 1.0079, 12.011 , 15.9994, 14.0067 }; Float_t zAra[4] = { 1.0 , 6.0 , 8.0 , 7.0 }; Float_t wAra[4] = { 3.0 , 1.0 , 1.0 , 1.0 }; Float_t dAra = 0.032; AliMixture(61,"Aramide", aAra, zAra, dAra, -4,wAra ); // GFK for Wacosit (Epoxy + Si) Float_t aGFK[4] = { 1.0079, 12.011 , 15.9994, 28.086 }; Float_t zGFK[4] = { 1.0 , 6.0 , 8.0 , 14.0 }; Float_t wGFK[4] = { 0.0445, 0.5031, 0.1118, 0.340 }; Float_t dGFK = 2.0; AliMixture(62,"GFK", aGFK, zGFK, dGFK, 4,wGFK ); ////////////////////////////////////////////////////////////////////////// // Tracking Media Parameters ////////////////////////////////////////////////////////////////////////// // General tracking parameter Float_t tmaxfd = -10.0; Float_t stemax = -1.0e10; Float_t deemax = -0.1; Float_t epsil = 1.0e-4; Float_t stmin = -0.001; // Al Frame AliMedium( 1,"Al Frame" , 1,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Air AliMedium( 2,"Air" ,51,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Wires AliMedium( 3,"Wires" , 2,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // All other ROB materials (caps, etc.) AliMedium( 4,"ROB Other" , 2,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Cu pads AliMedium( 5,"Padplane" , 2,1,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Fee + cables AliMedium( 6,"Readout" , 2,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // C frame (Wacosit) AliMedium( 7,"Wacosit" ,62,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // INOX of cooling bus bars AliMedium( 8,"Cooling bus", 7,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Gas-mixture (Xe/CO2) AliMedium( 9,"Gas-mix" ,53,1,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Honeycomb AliMedium(10,"Honeycomb" ,61,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Araldite glue AliMedium(11,"Glue" ,58,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // G10-plates AliMedium(13,"G10-plates" ,54,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Cooling water AliMedium(14,"Water" ,55,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Rohacell for the radiator AliMedium(15,"Rohacell" ,56,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Al layer in MCMs AliMedium(16,"MCM-Al" , 1,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Sn layer in MCMs AliMedium(17,"MCM-Sn" , 5,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Cu layer in MCMs AliMedium(18,"MCM-Cu" , 2,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // G10 layer in MCMs AliMedium(19,"MCM-G10" ,54,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Si in readout chips AliMedium(20,"Chip-Si" , 6,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Epoxy in readout chips AliMedium(21,"Chip-Ep" ,57,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // PE in connectors AliMedium(22,"Conn-PE" ,52,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Cu in connectors AliMedium(23,"Chip-Cu" , 2,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Al of cooling pipes AliMedium(24,"Cooling" , 1,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Cu in services AliMedium(25,"Serv-Cu" , 2,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Carbon fiber mat AliMedium(26,"Carbon" , 4,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Mylar foil AliMedium(27,"Mylar" ,59,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Polypropylene fibers AliMedium(28,"Fiber" ,60,0,isxfld,sxmgmx ,tmaxfd,stemax,deemax,epsil,stmin); // Save the density values for the TRD absorbtion Float_t dmy = 1.39; fFoilDensity = dmy; if (AliTRDCommonParam::Instance()->IsXenon()) { fGasDensity = dgmXe; fGasNobleFraction = fxc; } else if (AliTRDCommonParam::Instance()->IsArgon()) { fGasDensity = dgmAr; fGasNobleFraction = fac; } } //_____________________________________________________________________________ void AliTRD::Init() { // // Initialize the TRD detector after the geometry has been created // AliDebug(1,"++++++++++++++++++++++++++++++++++++++++++++++"); if (fGeometry->IsVersion() != 1) { AliError("Not a valid geometry"); } } //_____________________________________________________________________________ void AliTRD::ResetDigits() { // // Reset number of digits and the digits array for this detector // fNdigits = 0; if (fDigits) { fDigits->Clear(); } } //_____________________________________________________________________________ void AliTRD::SetTreeAddress() { // // Set the branch addresses for the trees. // if (fLoader->TreeH() && (fHits == 0x0)) { fHits = new TClonesArray("AliTRDhit",405); } AliDetector::SetTreeAddress(); } //_____________________________________________________________________________ Bool_t AliTRD::Raw2SDigits(AliRawReader *rawReader) { // // Converts RAW data to SDigits // AliLoader *loader = fRunLoader->GetLoader("TRDLoader"); if (!loader) { AliError("Can not get TRD loader from Run Loader"); return kFALSE; } TTree *tree = 0; tree = loader->TreeS(); if (!tree) { loader->MakeTree("S"); tree = loader->TreeS(); } AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class"); AliTRDrawData *rawdata = new AliTRDrawData(); AliTRDdigitsManager *digitsManager = rawdata->Raw2Digits(rawReader); // Create the s-digits manager AliTRDdigitsManager *sdigitsManager = new AliTRDdigitsManager(); if (sdigitsManager) { sdigitsManager->SetSDigits(kTRUE); sdigitsManager->CreateArrays(); // Convert the digits into s-digits digitizer.Digits2SDigits(digitsManager,sdigitsManager); sdigitsManager->MakeBranch(tree); sdigitsManager->WriteDigits(); delete digitsManager; return kTRUE; } else { return kFALSE; } } //_____________________________________________________________________________ AliLoader *AliTRD::MakeLoader(const Char_t *topfoldername) { // // Create a loader for the TRD tracklets // fLoader = new AliLoader(GetName(),topfoldername); AliInfo("Adding Tracklets-loader"); AliDataLoader *dl = new AliDataLoader("TRD.Tracklets.root" ,"tracklets" ,"tracklets"); fLoader->AddDataLoader(dl); dl = new AliDataLoader("TRD.GtuTracks.root" ,"gtutracks" ,"gtutracks"); fLoader->AddDataLoader(dl); return fLoader; } //_____________________________________________________________________________ AliTRD &AliTRD::operator=(const AliTRD &trd) { // // Assignment operator // if (this != &trd) { ((AliTRD &) trd).Copy(*this); } return *this; }