HcalSiPM Class Reference

A general implementation for the response of a SiPM. More...

#include <HcalSiPM.h>

Public Member Functions
int	getNCells () const
	HcalSiPM (int nCells=1)
virtual int	hitCells (int photons, int integral=0) const
void	initRandomEngine (CLHEP::HepRandomEngine &engine)
void	setNCells (int nCells)
virtual	~HcalSiPM ()

Protected Member Functions
void	defaultErrInit ()
virtual double	errOnX (double x, double prehit=0.) const
void	getBeforeAndAfter (double val, int &before, int &after, const std::vector< double > &vec) const

Protected Attributes
int	theCellCount
std::vector< std::vector < double > >	theErrSamples
std::vector< double >	thePrehitSamples
CLHEP::RandGaussQ *	theRndGauss
std::vector< double >	theXSamples

Detailed Description

A general implementation for the response of a SiPM.

Definition at line 17 of file HcalSiPM.h.

Constructor & Destructor Documentation

HcalSiPM::HcalSiPM

(

int

nCells = 1

)

Definition at line 9 of file HcalSiPM.cc.

References defaultErrInit(), and theCellCount.

                             :
  theCellCount(nCells), theRndGauss(0) {

  assert(theCellCount>0);

  defaultErrInit();
}

HcalSiPM::~HcalSiPM ( )

virtual

Definition at line 17 of file HcalSiPM.cc.

References theRndGauss.

                    {
  delete theRndGauss;
}

Member Function Documentation

void HcalSiPM::defaultErrInit ( )

protected

Definition at line 108 of file HcalSiPM.cc.

References alignCSCRings::e, i, groupFilesInBlocks::temp, theErrSamples, thePrehitSamples, and theXSamples.

Referenced by HcalSiPM().

                              {
  //load up values for the interpolation for the errs on x used to generate
  //the number of photons.  These were produced from a toy SiPM model.
  theXSamples.clear();
  thePrehitSamples.clear();
  theErrSamples.clear();

  theXSamples.push_back(7.14286e-05);
  theXSamples.push_back(0.000142857);
  theXSamples.push_back(0.000428571);
  theXSamples.push_back(0.00107143);
  theXSamples.push_back(0.00221429);
  theXSamples.push_back(0.004);
  theXSamples.push_back(0.00657143);
  theXSamples.push_back(0.0100714);
  theXSamples.push_back(0.0146429);
  theXSamples.push_back(0.0204286);
  theXSamples.push_back(0.0275714);
  theXSamples.push_back(0.0362143);
  theXSamples.push_back(0.0465);
  theXSamples.push_back(0.0585714);
  theXSamples.push_back(0.0725714);
  theXSamples.push_back(0.0886429);
  theXSamples.push_back(0.106929);
  theXSamples.push_back(0.127571);
  theXSamples.push_back(0.150714);
  theXSamples.push_back(0.1765);
  theXSamples.push_back(0.205071);
  theXSamples.push_back(0.236571);
  theXSamples.push_back(0.271143);
  theXSamples.push_back(0.308929);
  theXSamples.push_back(0.350071);
  theXSamples.push_back(0.394714);
  theXSamples.push_back(0.443);
  theXSamples.push_back(0.495071);
  theXSamples.push_back(0.551071);
  theXSamples.push_back(0.611143);
  theXSamples.push_back(0.675429);
  theXSamples.push_back(0.744071);
  theXSamples.push_back(0.817214);
  theXSamples.push_back(0.895);
  theXSamples.push_back(0.977571);
  theXSamples.push_back(1.06507);
  theXSamples.push_back(1.15764);
  theXSamples.push_back(1.25543);
  theXSamples.push_back(1.35857);
  theXSamples.push_back(1.46721);
  theXSamples.push_back(1.5815);
  theXSamples.push_back(1.70157);
  theXSamples.push_back(1.82757);
  theXSamples.push_back(1.95964);
  theXSamples.push_back(2.09793);
  theXSamples.push_back(2.24257);
  theXSamples.push_back(2.39371);
  theXSamples.push_back(2.5515);
  theXSamples.push_back(2.71607);
  theXSamples.push_back(2.88757);
  theXSamples.push_back(3.06614);
  theXSamples.push_back(3.25193);
  theXSamples.push_back(3.44507);
  theXSamples.push_back(3.64571);
  theXSamples.push_back(3.854);
  theXSamples.push_back(4.07007);
  theXSamples.push_back(4.29407);
  theXSamples.push_back(4.52614);
  theXSamples.push_back(4.76643);
  theXSamples.push_back(5.01507);
  theXSamples.push_back(5.27221);
  theXSamples.push_back(5.538);
  theXSamples.push_back(5.81257);
  theXSamples.push_back(6.09607);
  theXSamples.push_back(6.38864);
  theXSamples.push_back(6.69043);
  theXSamples.push_back(7.00157);
  theXSamples.push_back(7.32221);
  theXSamples.push_back(7.6525);
  theXSamples.push_back(7.99257);
  theXSamples.push_back(8.34257);
  theXSamples.push_back(8.70264);
  theXSamples.push_back(9.07293);
  theXSamples.push_back(9.45357);
  theXSamples.push_back(9.84471);
  theXSamples.push_back(10.2465);

  for(int i=0; i<16; i++) 
    thePrehitSamples.push_back(i*0.02);

  vector<double> temp;

  temp.push_back(0);
  temp.push_back(0);
  temp.push_back(0);
  temp.push_back(8.40058e-06);
  temp.push_back(1.17956e-05);
  temp.push_back(2.16323e-05);
  temp.push_back(3.82308e-05);
  temp.push_back(6.09053e-05);
  temp.push_back(8.38503e-05);
  temp.push_back(0.000119927);
  temp.push_back(0.000162094);
  temp.push_back(0.000214873);
  temp.push_back(0.000263888);
  temp.push_back(0.000358384);
  temp.push_back(0.000405752);
  temp.push_back(0.0004813);
  temp.push_back(0.000578313);
  temp.push_back(0.000708949);
  temp.push_back(0.000806313);
  temp.push_back(0.000947174);
  temp.push_back(0.00103474);
  temp.push_back(0.00117471);
  temp.push_back(0.00128605);
  temp.push_back(0.00137934);
  temp.push_back(0.00154853);
  temp.push_back(0.00177649);
  temp.push_back(0.00183272);
  temp.push_back(0.00186753);
  temp.push_back(0.0021082);
  temp.push_back(0.00224273);
  temp.push_back(0.00230361);
  temp.push_back(0.00237872);
  temp.push_back(0.00245845);
  temp.push_back(0.00265224);
  temp.push_back(0.00271459);
  temp.push_back(0.00256564);
  temp.push_back(0.00266094);
  temp.push_back(0.00280213);
  temp.push_back(0.00267646);
  temp.push_back(0.00263196);
  temp.push_back(0.00256547);
  temp.push_back(0.00248559);
  temp.push_back(0.00254747);
  temp.push_back(0.00246776);
  temp.push_back(0.0024417);
  temp.push_back(0.00233673);
  temp.push_back(0.00221526);
  temp.push_back(0.00212567);
  temp.push_back(0.00179446);
  temp.push_back(0.00174539);
  temp.push_back(0.00163708);
  temp.push_back(0.00152897);
  temp.push_back(0.00137436);
  temp.push_back(0.0012264);
  temp.push_back(0.00115666);
  temp.push_back(0.00104865);
  temp.push_back(0.000931932);
  temp.push_back(0.000867489);
  temp.push_back(0.000773467);
  temp.push_back(0.000659164);
  temp.push_back(0.00060111);
  temp.push_back(0.00054868);
  temp.push_back(0.000450312);
  temp.push_back(0.000393679);
  temp.push_back(0.000341696);
  temp.push_back(0.000305829);
  temp.push_back(0.000238913);
  temp.push_back(0.000216915);
  temp.push_back(0.000181357);
  temp.push_back(0.000164413);
  temp.push_back(0.000133342);
  temp.push_back(0.000113031);
  temp.push_back(9.45459e-05);
  temp.push_back(7.48834e-05);
  temp.push_back(5.68479e-05);
  temp.push_back(4.7456e-05);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(1.07019e-05);
  temp.push_back(1.4297e-05);
  temp.push_back(2.47542e-05);
  temp.push_back(3.98772e-05);
  temp.push_back(6.1143e-05);
  temp.push_back(7.55069e-05);
  temp.push_back(0.000101314);
  temp.push_back(0.000126813);
  temp.push_back(0.000169132);
  temp.push_back(0.00022141);
  temp.push_back(0.000261971);
  temp.push_back(0.000337033);
  temp.push_back(0.000353671);
  temp.push_back(0.000455462);
  temp.push_back(0.000529259);
  temp.push_back(0.00065141);
  temp.push_back(0.0007213);
  temp.push_back(0.000755735);
  temp.push_back(0.000905117);
  temp.push_back(0.000983389);
  temp.push_back(0.00117113);
  temp.push_back(0.00123377);
  temp.push_back(0.00140575);
  temp.push_back(0.0014624);
  temp.push_back(0.00158725);
  temp.push_back(0.0017951);
  temp.push_back(0.0019545);
  temp.push_back(0.00203318);
  temp.push_back(0.00228151);
  temp.push_back(0.00233437);
  temp.push_back(0.00236975);
  temp.push_back(0.00248279);
  temp.push_back(0.00257292);
  temp.push_back(0.00265839);
  temp.push_back(0.00291408);
  temp.push_back(0.00287581);
  temp.push_back(0.0027742);
  temp.push_back(0.0028192);
  temp.push_back(0.00290722);
  temp.push_back(0.00290954);
  temp.push_back(0.00289248);
  temp.push_back(0.0028919);
  temp.push_back(0.00274249);
  temp.push_back(0.00275067);
  temp.push_back(0.00254015);
  temp.push_back(0.00263388);
  temp.push_back(0.00246535);
  temp.push_back(0.00230695);
  temp.push_back(0.00219084);
  temp.push_back(0.00201822);
  temp.push_back(0.00195889);
  temp.push_back(0.00191163);
  temp.push_back(0.00195144);
  temp.push_back(0.0017406);
  temp.push_back(0.00171877);
  temp.push_back(0.00161755);
  temp.push_back(0.00161152);
  temp.push_back(0.00142289);
  temp.push_back(0.00142294);
  temp.push_back(0.00131059);
  temp.push_back(0.00131986);
  temp.push_back(0.00130397);
  temp.push_back(0.00131082);
  temp.push_back(0.00127312);
  temp.push_back(0.00127991);
  temp.push_back(0.00125962);
  temp.push_back(0.00123696);
  temp.push_back(0.00127488);
  temp.push_back(0.0012194);
  temp.push_back(0.00124351);
  temp.push_back(0.00130209);
  temp.push_back(0.00123718);
  temp.push_back(0.00126401);
  temp.push_back(0.0012762);
  temp.push_back(0.00118605);
  temp.push_back(0.00121322);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(1.52753e-05);
  temp.push_back(1.9252e-05);
  temp.push_back(3.51239e-05);
  temp.push_back(5.42772e-05);
  temp.push_back(8.42695e-05);
  temp.push_back(0.000112201);
  temp.push_back(0.000147315);
  temp.push_back(0.000181674);
  temp.push_back(0.000224435);
  temp.push_back(0.000284745);
  temp.push_back(0.000327223);
  temp.push_back(0.000395938);
  temp.push_back(0.000472805);
  temp.push_back(0.000519986);
  temp.push_back(0.000635296);
  temp.push_back(0.000669197);
  temp.push_back(0.000775362);
  temp.push_back(0.000874534);
  temp.push_back(0.00102977);
  temp.push_back(0.00113617);
  temp.push_back(0.00121311);
  temp.push_back(0.00141158);
  temp.push_back(0.00154837);
  temp.push_back(0.00169857);
  temp.push_back(0.00188519);
  temp.push_back(0.00191032);
  temp.push_back(0.00206575);
  temp.push_back(0.00222722);
  temp.push_back(0.00227325);
  temp.push_back(0.00245166);
  temp.push_back(0.00259628);
  temp.push_back(0.00249795);
  temp.push_back(0.00272387);
  temp.push_back(0.00297299);
  temp.push_back(0.0030973);
  temp.push_back(0.00299177);
  temp.push_back(0.00288901);
  temp.push_back(0.00304009);
  temp.push_back(0.00300757);
  temp.push_back(0.003216);
  temp.push_back(0.00301877);
  temp.push_back(0.00305196);
  temp.push_back(0.00305521);
  temp.push_back(0.00264599);
  temp.push_back(0.00289825);
  temp.push_back(0.00273878);
  temp.push_back(0.0028623);
  temp.push_back(0.00262132);
  temp.push_back(0.00244983);
  temp.push_back(0.00238771);
  temp.push_back(0.00241464);
  temp.push_back(0.0022464);
  temp.push_back(0.00216141);
  temp.push_back(0.00216927);
  temp.push_back(0.00202911);
  temp.push_back(0.00201579);
  temp.push_back(0.00206435);
  temp.push_back(0.00189058);
  temp.push_back(0.0019032);
  temp.push_back(0.00180546);
  temp.push_back(0.00181397);
  temp.push_back(0.00177982);
  temp.push_back(0.00169705);
  temp.push_back(0.00175611);
  temp.push_back(0.00183977);
  temp.push_back(0.00181481);
  temp.push_back(0.0017491);
  temp.push_back(0.00167498);
  temp.push_back(0.00176056);
  temp.push_back(0.00168206);
  temp.push_back(0.00178997);
  temp.push_back(0.00160131);
  temp.push_back(0.00175127);
  temp.push_back(0.00175144);
  temp.push_back(0.00172983);
  temp.push_back(0.00176049);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(1.56003e-05);
  temp.push_back(2.56961e-05);
  temp.push_back(3.98157e-05);
  temp.push_back(7.51062e-05);
  temp.push_back(0.000104808);
  temp.push_back(0.000137126);
  temp.push_back(0.000181945);
  temp.push_back(0.00023428);
  temp.push_back(0.000276685);
  temp.push_back(0.000340639);
  temp.push_back(0.000365219);
  temp.push_back(0.000455067);
  temp.push_back(0.000517277);
  temp.push_back(0.000653087);
  temp.push_back(0.000704082);
  temp.push_back(0.00081798);
  temp.push_back(0.000919737);
  temp.push_back(0.000997528);
  temp.push_back(0.00110852);
  temp.push_back(0.00127015);
  temp.push_back(0.00135952);
  temp.push_back(0.00157116);
  temp.push_back(0.00169714);
  temp.push_back(0.00181507);
  temp.push_back(0.00188281);
  temp.push_back(0.00187945);
  temp.push_back(0.00224784);
  temp.push_back(0.00234832);
  temp.push_back(0.00246759);
  temp.push_back(0.00258435);
  temp.push_back(0.00287211);
  temp.push_back(0.00282387);
  temp.push_back(0.00301207);
  temp.push_back(0.00301706);
  temp.push_back(0.00314772);
  temp.push_back(0.00313356);
  temp.push_back(0.00330207);
  temp.push_back(0.00321868);
  temp.push_back(0.00340633);
  temp.push_back(0.00316687);
  temp.push_back(0.0030367);
  temp.push_back(0.00346355);
  temp.push_back(0.00308358);
  temp.push_back(0.00313356);
  temp.push_back(0.00322158);
  temp.push_back(0.00286642);
  temp.push_back(0.0030063);
  temp.push_back(0.0028074);
  temp.push_back(0.00276659);
  temp.push_back(0.00284753);
  temp.push_back(0.00260215);
  temp.push_back(0.00256294);
  temp.push_back(0.00264208);
  temp.push_back(0.00247397);
  temp.push_back(0.00249761);
  temp.push_back(0.00232896);
  temp.push_back(0.00237722);
  temp.push_back(0.00223927);
  temp.push_back(0.00218478);
  temp.push_back(0.00219469);
  temp.push_back(0.00223608);
  temp.push_back(0.00225412);
  temp.push_back(0.00218023);
  temp.push_back(0.00223298);
  temp.push_back(0.0021489);
  temp.push_back(0.00216245);
  temp.push_back(0.00222762);
  temp.push_back(0.0021608);
  temp.push_back(0.00226409);
  temp.push_back(0.00215114);
  temp.push_back(0.00209354);
  temp.push_back(0.00220478);
  temp.push_back(0.00212817);
  temp.push_back(0.00216157);
  temp.push_back(0.00210899);
  temp.push_back(0.00221498);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(1.98294e-05);
  temp.push_back(2.74883e-05);
  temp.push_back(4.97341e-05);
  temp.push_back(7.8167e-05);
  temp.push_back(0.000115158);
  temp.push_back(0.000159637);
  temp.push_back(0.000198413);
  temp.push_back(0.000249918);
  temp.push_back(0.000307694);
  temp.push_back(0.00037631);
  temp.push_back(0.000420037);
  temp.push_back(0.000530557);
  temp.push_back(0.000574406);
  temp.push_back(0.000678883);
  temp.push_back(0.000783538);
  temp.push_back(0.000828001);
  temp.push_back(0.000945383);
  temp.push_back(0.0010672);
  temp.push_back(0.00119183);
  temp.push_back(0.00134696);
  temp.push_back(0.00155348);
  temp.push_back(0.00167101);
  temp.push_back(0.00181066);
  temp.push_back(0.00187759);
  temp.push_back(0.00199899);
  temp.push_back(0.00225269);
  temp.push_back(0.0023458);
  temp.push_back(0.00253072);
  temp.push_back(0.00270998);
  temp.push_back(0.00263773);
  temp.push_back(0.00294804);
  temp.push_back(0.00294624);
  temp.push_back(0.00321668);
  temp.push_back(0.00332147);
  temp.push_back(0.00334766);
  temp.push_back(0.00330149);
  temp.push_back(0.00340882);
  temp.push_back(0.00347742);
  temp.push_back(0.00352589);
  temp.push_back(0.0035523);
  temp.push_back(0.0035411);
  temp.push_back(0.00340469);
  temp.push_back(0.00335693);
  temp.push_back(0.00345872);
  temp.push_back(0.00316091);
  temp.push_back(0.0031948);
  temp.push_back(0.00307664);
  temp.push_back(0.00320621);
  temp.push_back(0.00304138);
  temp.push_back(0.00299107);
  temp.push_back(0.00281006);
  temp.push_back(0.00278658);
  temp.push_back(0.0028095);
  temp.push_back(0.00268299);
  temp.push_back(0.0027215);
  temp.push_back(0.00264144);
  temp.push_back(0.00260714);
  temp.push_back(0.00255874);
  temp.push_back(0.00266137);
  temp.push_back(0.00248823);
  temp.push_back(0.0026194);
  temp.push_back(0.0026251);
  temp.push_back(0.00245108);
  temp.push_back(0.00254617);
  temp.push_back(0.00264651);
  temp.push_back(0.00247705);
  temp.push_back(0.00252758);
  temp.push_back(0.00262686);
  temp.push_back(0.00248693);
  temp.push_back(0.00254178);
  temp.push_back(0.00258846);
  temp.push_back(0.0025353);
  temp.push_back(0.00240568);
  temp.push_back(0.00250232);
  temp.push_back(0.00251452);
  temp.push_back(0.00258121);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(2.362e-05);
  temp.push_back(3.24457e-05);
  temp.push_back(5.93625e-05);
  temp.push_back(9.71924e-05);
  temp.push_back(0.000126279);
  temp.push_back(0.000176152);
  temp.push_back(0.000224722);
  temp.push_back(0.000290262);
  temp.push_back(0.000351171);
  temp.push_back(0.000439513);
  temp.push_back(0.000497545);
  temp.push_back(0.000596431);
  temp.push_back(0.000686665);
  temp.push_back(0.000716486);
  temp.push_back(0.000835977);
  temp.push_back(0.000943229);
  temp.push_back(0.00104521);
  temp.push_back(0.00120528);
  temp.push_back(0.00140133);
  temp.push_back(0.00144132);
  temp.push_back(0.00164603);
  temp.push_back(0.00179182);
  temp.push_back(0.00188172);
  temp.push_back(0.00203418);
  temp.push_back(0.00224695);
  temp.push_back(0.00224972);
  temp.push_back(0.00259959);
  temp.push_back(0.00249426);
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  temp.push_back(0.00340672);
  temp.push_back(0.00376872);
  temp.push_back(0.00397498);
  temp.push_back(0.00407663);
  temp.push_back(0.00416444);
  temp.push_back(0.00447438);
  temp.push_back(0.00421777);
  temp.push_back(0.00434779);
  temp.push_back(0.00457815);
  temp.push_back(0.00510487);
  temp.push_back(0.004957);
  temp.push_back(0.0050608);
  temp.push_back(0.00482047);
  temp.push_back(0.00479584);
  temp.push_back(0.00506816);
  temp.push_back(0.00485049);
  temp.push_back(0.00502603);
  temp.push_back(0.00496904);
  temp.push_back(0.0048041);
  temp.push_back(0.00498567);
  temp.push_back(0.00505111);
  temp.push_back(0.00495093);
  temp.push_back(0.00493909);
  temp.push_back(0.00518096);
  temp.push_back(0.00475333);
  temp.push_back(0.00509383);
  temp.push_back(0.00455324);
  temp.push_back(0.00501535);
  temp.push_back(0.00477645);
  temp.push_back(0.00467969);
  temp.push_back(0.00482058);
  temp.push_back(0.0049352);
  temp.push_back(0.00479813);
  temp.push_back(0.00456841);
  temp.push_back(0.00495553);
  temp.push_back(0.00475263);
  temp.push_back(0.00464536);
  temp.push_back(0.0045788);
  temp.push_back(0.00482641);
  temp.push_back(0.00468534);
  temp.push_back(0.00458609);
  temp.push_back(0.00469523);
  temp.push_back(0.00471367);
  temp.push_back(0.00480113);
  temp.push_back(0.00477874);
  temp.push_back(0.00487724);
  temp.push_back(0.00448248);
  temp.push_back(0.00457135);
  temp.push_back(0.00463623);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(4.19494e-05);
  temp.push_back(5.81133e-05);
  temp.push_back(0.000106598);
  temp.push_back(0.000167045);
  temp.push_back(0.000245601);
  temp.push_back(0.000309417);
  temp.push_back(0.000402556);
  temp.push_back(0.000531311);
  temp.push_back(0.000599414);
  temp.push_back(0.000724794);
  temp.push_back(0.000843293);
  temp.push_back(0.00102089);
  temp.push_back(0.00110244);
  temp.push_back(0.00119442);
  temp.push_back(0.0014845);
  temp.push_back(0.00144809);
  temp.push_back(0.00163904);
  temp.push_back(0.00179288);
  temp.push_back(0.00208349);
  temp.push_back(0.00218156);
  temp.push_back(0.00241731);
  temp.push_back(0.00260733);
  temp.push_back(0.0028223);
  temp.push_back(0.00303541);
  temp.push_back(0.00317796);
  temp.push_back(0.00318073);
  temp.push_back(0.00354012);
  temp.push_back(0.0038304);
  temp.push_back(0.00394061);
  temp.push_back(0.00388992);
  temp.push_back(0.00415685);
  temp.push_back(0.004271);
  temp.push_back(0.00454353);
  temp.push_back(0.00436867);
  temp.push_back(0.00471855);
  temp.push_back(0.00486456);
  temp.push_back(0.00458562);
  temp.push_back(0.00467012);
  temp.push_back(0.00488229);
  temp.push_back(0.0051219);
  temp.push_back(0.00525306);
  temp.push_back(0.00520996);
  temp.push_back(0.00512736);
  temp.push_back(0.00506308);
  temp.push_back(0.00509758);
  temp.push_back(0.00513977);
  temp.push_back(0.00506956);
  temp.push_back(0.0050327);
  temp.push_back(0.00528484);
  temp.push_back(0.00541921);
  temp.push_back(0.00486394);
  temp.push_back(0.00532431);
  temp.push_back(0.00491166);
  temp.push_back(0.0054032);
  temp.push_back(0.00515276);
  temp.push_back(0.00499206);
  temp.push_back(0.00507303);
  temp.push_back(0.00528015);
  temp.push_back(0.00502935);
  temp.push_back(0.00498204);
  temp.push_back(0.00482074);
  temp.push_back(0.0050209);
  temp.push_back(0.00506188);
  temp.push_back(0.00501215);
  temp.push_back(0.00523337);
  temp.push_back(0.00501484);
  temp.push_back(0.00482134);
  temp.push_back(0.00510347);
  temp.push_back(0.00500609);
  temp.push_back(0.00508656);
  temp.push_back(0.00505679);
  temp.push_back(0.00526603);
  temp.push_back(0.00491982);
  temp.push_back(0.00505811);
  temp.push_back(0.00494347);
  temp.push_back(0.00506382);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(4.58461e-05);
  temp.push_back(6.56593e-05);
  temp.push_back(0.000106249);
  temp.push_back(0.000177259);
  temp.push_back(0.000242624);
  temp.push_back(0.000318801);
  temp.push_back(0.000429442);
  temp.push_back(0.000524763);
  temp.push_back(0.000627853);
  temp.push_back(0.000767861);
  temp.push_back(0.000914838);
  temp.push_back(0.00101068);
  temp.push_back(0.00119111);
  temp.push_back(0.00124833);
  temp.push_back(0.00147471);
  temp.push_back(0.00151766);
  temp.push_back(0.00175504);
  temp.push_back(0.0019513);
  temp.push_back(0.00225088);
  temp.push_back(0.00232528);
  temp.push_back(0.002477);
  temp.push_back(0.0026629);
  temp.push_back(0.00282126);
  temp.push_back(0.00305865);
  temp.push_back(0.00328165);
  temp.push_back(0.00342969);
  temp.push_back(0.00368517);
  temp.push_back(0.00412023);
  temp.push_back(0.00408107);
  temp.push_back(0.00442514);
  temp.push_back(0.00419995);
  temp.push_back(0.00445839);
  temp.push_back(0.00480241);
  temp.push_back(0.00469063);
  temp.push_back(0.00488558);
  temp.push_back(0.00505738);
  temp.push_back(0.00534401);
  temp.push_back(0.00529189);
  temp.push_back(0.00503914);
  temp.push_back(0.00547271);
  temp.push_back(0.00532523);
  temp.push_back(0.0056474);
  temp.push_back(0.00528356);
  temp.push_back(0.00537977);
  temp.push_back(0.00528494);
  temp.push_back(0.00555228);
  temp.push_back(0.00522019);
  temp.push_back(0.00551423);
  temp.push_back(0.00532466);
  temp.push_back(0.00562846);
  temp.push_back(0.00531636);
  temp.push_back(0.00534452);
  temp.push_back(0.00546899);
  temp.push_back(0.00540307);
  temp.push_back(0.00522696);
  temp.push_back(0.00543343);
  temp.push_back(0.00496315);
  temp.push_back(0.0054688);
  temp.push_back(0.0054534);
  temp.push_back(0.00529457);
  temp.push_back(0.00527906);
  temp.push_back(0.00505608);
  temp.push_back(0.00532934);
  temp.push_back(0.00540523);
  temp.push_back(0.00546589);
  temp.push_back(0.00541721);
  temp.push_back(0.00518411);
  temp.push_back(0.0050658);
  temp.push_back(0.00538019);
  temp.push_back(0.00523502);
  temp.push_back(0.00518119);
  temp.push_back(0.00541954);
  temp.push_back(0.00556926);
  temp.push_back(0.00516485);
  temp.push_back(0.00543988);
  temp.push_back(0.00534757);
  theErrSamples.push_back(temp);
  temp.clear();

  temp.push_back(4.87191e-05);
  temp.push_back(6.79557e-05);
  temp.push_back(0.00011585);
  temp.push_back(0.000170012);
  temp.push_back(0.000249995);
  temp.push_back(0.000358082);
  temp.push_back(0.000441529);
  temp.push_back(0.000573455);
  temp.push_back(0.000686492);
  temp.push_back(0.000768395);
  temp.push_back(0.000922129);
  temp.push_back(0.0010261);
  temp.push_back(0.00121379);
  temp.push_back(0.00132394);
  temp.push_back(0.00147006);
  temp.push_back(0.0016026);
  temp.push_back(0.00185945);
  temp.push_back(0.00205459);
  temp.push_back(0.00224833);
  temp.push_back(0.00239438);
  temp.push_back(0.00258948);
  temp.push_back(0.00285399);
  temp.push_back(0.00293392);
  temp.push_back(0.00310816);
  temp.push_back(0.0035526);
  temp.push_back(0.00353642);
  temp.push_back(0.003711);
  temp.push_back(0.00392946);
  temp.push_back(0.00417796);
  temp.push_back(0.00440017);
  temp.push_back(0.00474434);
  temp.push_back(0.00469919);
  temp.push_back(0.00476225);
  temp.push_back(0.00474708);
  temp.push_back(0.00515252);
  temp.push_back(0.0053985);
  temp.push_back(0.00515269);
  temp.push_back(0.00535194);
  temp.push_back(0.00519113);
  temp.push_back(0.00531732);
  temp.push_back(0.00545661);
  temp.push_back(0.00562353);
  temp.push_back(0.00547828);
  temp.push_back(0.00590485);
  temp.push_back(0.0054847);
  temp.push_back(0.00575722);
  temp.push_back(0.00578941);
  temp.push_back(0.0055163);
  temp.push_back(0.00565193);
  temp.push_back(0.00559088);
  temp.push_back(0.00578905);
  temp.push_back(0.00568463);
  temp.push_back(0.00538114);
  temp.push_back(0.00569508);
  temp.push_back(0.00534805);
  temp.push_back(0.00521921);
  temp.push_back(0.00568289);
  temp.push_back(0.0055866);
  temp.push_back(0.00561974);
  temp.push_back(0.00548487);
  temp.push_back(0.00558498);
  temp.push_back(0.00536631);
  temp.push_back(0.00541084);
  temp.push_back(0.00577058);
  temp.push_back(0.00540762);
  temp.push_back(0.00545929);
  temp.push_back(0.00571948);
  temp.push_back(0.00546965);
  temp.push_back(0.00557277);
  temp.push_back(0.00554671);
  temp.push_back(0.00521175);
  temp.push_back(0.00546106);
  temp.push_back(0.00541317);
  temp.push_back(0.00569926);
  temp.push_back(0.0055058);
  temp.push_back(0.00537131);
  theErrSamples.push_back(temp);
  temp.clear();

}

double HcalSiPM::errOnX ( double  x, double  prehit = 0.  ) const

protectedvirtual

Definition at line 75 of file HcalSiPM.cc.

References getBeforeAndAfter(), i, j, theErrSamples, thePrehitSamples, and theXSamples.

Referenced by hitCells().

                                                     {
  //interpolate between the points in the x,prehit space to determine the
  //width of the distribution of x
  int before, after;
  getBeforeAndAfter(x, before, after, theXSamples);
  int i, j;
  getBeforeAndAfter(prehit, i, j, thePrehitSamples);
  double m1 = (theErrSamples[i][after]-theErrSamples[i][before])/
    (theXSamples[after]-theXSamples[before]);
  double err1 = theErrSamples[i][before]+m1*(x-theXSamples[before]);
  double m2 = (theErrSamples[j][after]-theErrSamples[j][before])/
    (theXSamples[after]-theXSamples[before]);
  double err2 = theErrSamples[j][before]+m2*(x-theXSamples[before]);

  return err1 + (err2-err1)/(thePrehitSamples[j]-thePrehitSamples[i])*
    (prehit - thePrehitSamples[i]);
}

void HcalSiPM::getBeforeAndAfter ( double  val, int &  before, int &  after, const std::vector< double > &  vec  ) const

protected

Definition at line 93 of file HcalSiPM.cc.

Referenced by errOnX().

                                                  {
  //binary like search to indeces points around an arbitrary value.
  before = 0;
  after = vec.size()-1;
  int mid = vec.size()/2;
  bool go = true;
  do {
    if (vec[mid]>val) after = mid;
    else before = mid;
    mid = (after+before)/2;
    go = (after-before > 1);
  } while (go);
}

int HcalSiPM::getNCells ( ) const

inline

Definition at line 25 of file HcalSiPM.h.

References theCellCount.

{ return theCellCount; }

int HcalSiPM::hitCells ( int  photons, int  integral = 0  ) const

virtual

Definition at line 21 of file HcalSiPM.cc.

References errOnX(), edm::hlt::Exception, create_public_lumi_plots::exp, edm::RandomNumberGenerator::getEngine(), edm::Service< T >::isAvailable(), timingPdfMaker::mean, theCellCount, theRndGauss, tablePrinter::width, and vdt::x.

Referenced by HcalSiPMHitResponse::makeSiPMSignal().

                                                      {
  //don't need to do zero or negative photons.
  if (photons < 1) return 0;
  if (integral < 0) integral = 0;
  if (integral >= theCellCount) return 0;

  if (theRndGauss == 0) {
    //random number generator setup
    edm::Service<edm::RandomNumberGenerator> rng;
    if ( ! rng.isAvailable()) {
      throw cms::Exception("Configuration")
    << "HcalSiPM requires the RandomNumberGeneratorService\n"
    "which is not present in the configuration file.  "
    "You must add the service\n"
    "in the configuration file or remove the modules that require it.";
    }

    CLHEP::HepRandomEngine& engine = rng->getEngine();
    theRndGauss = new CLHEP::RandGaussQ(engine);
  }

  //normalize by theCellCount to remove dependency on SiPM size and pixel density.
  double x = double(photons)/double(theCellCount);
  double prehit = double(integral)/double(theCellCount);

  //calculate the width and mean of the distribution for a given x
  double width = errOnX(x, prehit);
  double mean = 1. - std::exp(-x);

  //you can't hit more than everything.
  if (mean > 1.) mean = 1.;

  //convert back to absolute pixels
  mean *= (1-prehit)*theCellCount;
  width *= (1-prehit)*theCellCount;

  double npe;
  while (true) {
    npe = theRndGauss->fire(mean, width);
    if ((npe > -0.5) && (npe <= theCellCount-integral) && (npe <= photons))
      return int(npe + 0.5);
  }
}

void HcalSiPM::initRandomEngine

(

CLHEP::HepRandomEngine &

engine

)

Definition at line 70 of file HcalSiPM.cc.

References theRndGauss.

Referenced by HcalSiPMHitResponse::setRandomEngine().

                                                            {
  if(theRndGauss) delete theRndGauss;
  theRndGauss = new CLHEP::RandGaussQ(engine);
}

void HcalSiPM::setNCells

(

int

nCells

)

Definition at line 65 of file HcalSiPM.cc.

References theCellCount.

Referenced by HcalSiPMHitResponse::makeSiPMSignal().

                                   {
  assert(nCells>0);
  theCellCount = nCells;
}

Member Data Documentation

int HcalSiPM::theCellCount

protected

Definition at line 34 of file HcalSiPM.h.

Referenced by getNCells(), HcalSiPM(), hitCells(), and setNCells().

std::vector< std::vector< double > > HcalSiPM::theErrSamples

protected

Definition at line 39 of file HcalSiPM.h.

Referenced by defaultErrInit(), and errOnX().

std::vector< double > HcalSiPM::thePrehitSamples

protected

Definition at line 38 of file HcalSiPM.h.

Referenced by defaultErrInit(), and errOnX().

CLHEP::RandGaussQ* HcalSiPM::theRndGauss

mutableprotected

Definition at line 35 of file HcalSiPM.h.

Referenced by hitCells(), initRandomEngine(), and ~HcalSiPM().

std::vector< double > HcalSiPM::theXSamples

protected

Definition at line 37 of file HcalSiPM.h.

Referenced by defaultErrInit(), and errOnX().