Gabriele Cosmo
80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
#include "Riostream.h"
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#include "TSystem.h"
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#include "TInterpreter.h"
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#include "TROOT.h"
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#include "TApplication.h"
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#include "TFile.h"
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#include "TNtuple.h"
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#include "TCanvas.h"
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#include "TH1F.h"
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#include "THStack.h"
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#include "TCut.h"
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#include "TString.h"
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#include "TMath.h"
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/***************************
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* Root script that produces the yield calculations for fragments
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* below the angle of 10 degrees.
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* This is the same numbers E.Haettner has calculated
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* However, there is room for much improvement to be made here.
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*
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* @author Gillis Danielsen
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* **************************/
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void fragmentYields() {
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// gROOT->SetStyle("clearRetro");
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//this will be used as base for pulling the experimental data
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TString dir = gSystem->UnixPathName(gInterpreter->GetCurrentMacroName());
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dir.ReplaceAll("fragmentAngularDistribution.C","");
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dir.ReplaceAll("/./","/");
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ifstream in;
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TString pDepth, fragment, Znum, normToOneAtZeroAngle;
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cout << "Enter phantom depth (eg. 27.9, see experimentalData directory for choices): ";
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cin >> pDepth;
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TString simulationDataPath = "IAEA_" + pDepth + ".root";
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//Let's pull in the simulation-data
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//TFile *MCData = TFile::Open("IAEA_" + pDepth + ".root");
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TFile *MCData = TFile::Open(simulationDataPath);
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TNtuple *fragments = (TNtuple*) MCData->Get("fragmentNtuple");
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//Block bellow pulls out the simulation's metadata from the metadata ntuple.
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TNtuple *metadata = (TNtuple*) MCData->Get("metaData");
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Float_t events, detectorDistance,waterThickness,beamEnergy,energyError,phantomCenterDistance;
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metadata->SetBranchAddress("events",&events);
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metadata->SetBranchAddress("waterThickness",&waterThickness);
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metadata->SetBranchAddress("detectorDistance",&detectorDistance);
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metadata->SetBranchAddress("beamEnergy",&beamEnergy);
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metadata->SetBranchAddress("energyError",&energyError);
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metadata->SetBranchAddress("phantomCenterDistance",&phantomCenterDistance);
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metadata->GetEntry(0); //there is just one row to consider.
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//good to keep for ref. G4 might give weird units due to change.
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metadata->Scan();
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//ALL UNITS ARE cm!
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Double_t scatteringDistance = detectorDistance - phantomCenterDistance; //temporarily hard-coded, should be distance from target-center to detector
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Double_t r;
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Double_t degrees = 10.0;
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Double_t rMin;
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Double_t rMax;
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TString rMinString;
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TString rMaxString;
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rMinString = "0.00";
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rMaxString = Form("%f", scatteringDistance*TMath::ATan(degrees*TMath::DegToRad()));
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std::cout << "Computes comparable figures to E.haettners yield calculations for zero to ten degree angles." << endl;
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std::cout << "Firsta value is yield of Z=1 per C12 incident paritcle second is for Z=2 etc." << endl;
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std::cout << "verboseness has been limited to make pasting easyer." << endl;
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for(int i = 1; i <= 6; i++){
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int numEntries = fragments->GetEntries("(Z == " + TString::Format("%i",i) + " && sqrt(posY^2 + posZ^2) < " + rMaxString + "&& sqrt(posY*posY + posZ*posZ) > " + rMinString + ")");
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std::cout << numEntries / (events * .999) << endl; //< for calculation of FWHM
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}
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}
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