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14 **************************************************************************/
18 //_________________________________________________________________________
19 // Main class for TRD1 geometry of Shish-Kebab case.
20 // Author: Aleksei Pavlinov(WSU).
21 // Sep 20004 - Nov 2006
22 // See web page with description of Shish-Kebab geometries:
23 // http://pdsfweb01.nersc.gov/~pavlinov/ALICE/SHISHKEBAB/RES/shishkebabALICE.html
24 // Nov 9,2006 - added cas of 3X3
25 //_________________________________________________________________________
28 #include "AliEMCALShishKebabTrd1Module.h"
30 #include "AliEMCALGeometry.h"
32 #include <Riostream.h>
34 ClassImp(AliEMCALShishKebabTrd1Module)
36 AliEMCALGeometry *AliEMCALShishKebabTrd1Module::fgGeometry=0;
37 Double_t AliEMCALShishKebabTrd1Module::fga=0.;
38 Double_t AliEMCALShishKebabTrd1Module::fga2=0.;
39 Double_t AliEMCALShishKebabTrd1Module::fgb=0.;
40 Double_t AliEMCALShishKebabTrd1Module::fgr=0.;
41 Double_t AliEMCALShishKebabTrd1Module::fgangle=0.; // around one degree
42 Double_t AliEMCALShishKebabTrd1Module::fgtanBetta=0; //
44 //_____________________________________________________________________________
45 AliEMCALShishKebabTrd1Module::AliEMCALShishKebabTrd1Module(Double_t theta, AliEMCALGeometry *g)
59 // theta in radians ; first object shold be with theta=pi/2.
61 fTheta = TMath::PiOver2();
66 } else Warning("AliEMCALShishKebabTrd1Module(theta)","You should call this constractor just once !!");
68 AliInfo(Form("AliEMCALShishKebabTrd1Module - first module: theta %1.4f geometry %s",fTheta,g->GetName()));
71 //_____________________________________________________________________________
72 AliEMCALShishKebabTrd1Module::AliEMCALShishKebabTrd1Module(AliEMCALShishKebabTrd1Module &leftNeighbor)
86 // printf("** Left Neighbor : %s **\n", leftNeighbor.GetName());
87 fTheta = leftNeighbor.GetTheta() - fgangle;
89 TObject::SetUniqueID(leftNeighbor.GetUniqueID()+1);
91 Init(leftNeighbor.GetA(),leftNeighbor.GetB());
94 //________________________________________________________________
95 AliEMCALShishKebabTrd1Module::AliEMCALShishKebabTrd1Module(const AliEMCALShishKebabTrd1Module& mod)
96 : TNamed(mod.GetName(),mod.GetTitle()),
100 fThetaA(mod.fThetaA),
109 for (Int_t i=0; i<3; i++) fOK3X3[i] = mod.fOK3X3[i];
112 //________________________________________________________________
113 void AliEMCALShishKebabTrd1Module::Init(Double_t A, Double_t B)
115 // Define parameter module from parameters A,B from previos.
116 Double_t yl = (fgb/2)*TMath::Sin(fTheta) + (fga/2)*TMath::Cos(fTheta) + fgr, y = yl;
117 Double_t xl = (yl - B) / A; // y=A*x+B
119 // Double_t xp1 = (fga/2. + fgb/2.*fgtanBetta)/(TMath::Sin(fTheta) + fgtanBetta*TMath::Cos(fTheta));
120 // printf(" xp1 %9.3f \n ", xp1);
121 // xp1 == xp => both methods give the same results - 3-feb-05
122 Double_t alpha = TMath::Pi()/2. + fgangle/2;
123 Double_t xt = (fga+fga2)*TMath::Tan(fTheta)*TMath::Tan(alpha)/(4.*(1.-TMath::Tan(fTheta)*TMath::Tan(alpha)));
124 Double_t yt = xt / TMath::Tan(fTheta), xp = TMath::Sqrt(xt*xt + yt*yt);
125 Double_t x = xl + xp;
127 // printf(" yl %9.3f | xl %9.3f | xp %9.3f \n", yl, xl, xp);
129 // have to define A and B;
130 Double_t yCprev = fgr + fga*TMath::Cos(fTheta);
131 Double_t xCprev = (yCprev - B) / A;
132 Double_t xA = xCprev + fga*TMath::Sin(fTheta), yA = fgr;
134 fThetaA = fTheta - fgangle/2.;
135 fA = TMath::Tan(fThetaA); // !!
141 void AliEMCALShishKebabTrd1Module::DefineAllStaff()
144 // Centers of module - 2X2 case
145 Double_t kk1 = (fga+fga2)/(2.*4.); // kk1=kk2
147 Double_t xk1 = fOK.X() - kk1*TMath::Sin(fTheta);
148 Double_t yk1 = fOK.Y() + kk1*TMath::Cos(fTheta) - fgr;
151 Double_t xk2 = fOK.X() + kk1*TMath::Sin(fTheta);
152 Double_t yk2 = fOK.Y() - kk1*TMath::Cos(fTheta) - fgr;
155 // Centers of module - 3X3 case; Nov 9,2006
156 fOK3X3[1].Set(fOK.X(), fOK.Y()-fgr); // coincide with module center
158 kk1 = ((fga+fga2)/4. + fga/6.)/2.;
160 xk1 = fOK.X() - kk1*TMath::Sin(fTheta);
161 yk1 = fOK.Y() + kk1*TMath::Cos(fTheta) - fgr;
162 fOK3X3[0].Set(xk1,yk1);
164 xk2 = fOK.X() + kk1*TMath::Sin(fTheta);
165 yk2 = fOK.Y() - kk1*TMath::Cos(fTheta) - fgr;
166 fOK3X3[2].Set(xk2,yk2);
168 // May 15, 2006; position of cell face of cells
169 fOB.Set(fOK.X()-fgb/2.*TMath::Cos(fTheta), fOK.Y()-fgb/2.*TMath::Sin(fTheta)-fgr);
170 fOB1.Set(fOB.X()-fga/4.*TMath::Sin(fTheta), fOB.Y()+fga/4.*TMath::Cos(fTheta));
171 fOB2.Set(fOB.X()+fga/4.*TMath::Sin(fTheta), fOB.Y()-fga/4.*TMath::Cos(fTheta));
175 //_____________________________________________________________________________
176 void AliEMCALShishKebabTrd1Module::DefineFirstModule()
178 // Define first module
179 fOK.Set(fga2/2., fgr + fgb/2.); // position the center of module vs o
181 // parameters of right line : y = A*z + B in system where zero point is IP.
182 fThetaA = fTheta - fgangle/2.;
183 fA = TMath::Tan(fThetaA);
184 Double_t xA = fga/2. + fga2/2., yA = fgr;
187 TObject::SetUniqueID(1); //
192 //_____________________________________________________________________________
193 void AliEMCALShishKebabTrd1Module::DefineName(Double_t theta)
195 // Define name of object
196 SetName(Form("%2i(%5.2f)", TObject::GetUniqueID(), theta*TMath::RadToDeg()));
199 //_____________________________________________________________________________
200 Bool_t AliEMCALShishKebabTrd1Module::GetParameters()
202 // Get needing module parameters from EMCAL geometry
203 if(!fgGeometry) fgGeometry = AliEMCALGeometry::GetInstance();
204 TString sn(fgGeometry->GetName()); // 2-Feb-05
207 Warning("GetParameters()"," No geometry ");
211 fga = (Double_t)fgGeometry->GetEtaModuleSize();
212 fgb = (Double_t)fgGeometry->GetLongModuleSize();
213 fgangle = Double_t(fgGeometry->GetTrd1Angle())*TMath::DegToRad();
214 fgtanBetta = TMath::Tan(fgangle/2.);
215 fgr = (Double_t)fgGeometry->GetIPDistance();
217 if(!sn.Contains("TRD2")) fgr += fgGeometry->GetSteelFrontThickness();
219 fga2 = Double_t(fgGeometry->Get2Trd1Dx2());
225 //_____________________________________________________________________________
226 void AliEMCALShishKebabTrd1Module::PrintShish(int pri) const
230 printf("PrintShish() \n a %7.3f:%7.3f | b %7.2f | r %7.2f \n TRD1 angle %7.6f(%5.2f) | tanBetta %7.6f",
231 fga, fga2, fgb, fgr, fgangle, fgangle*TMath::RadToDeg(), fgtanBetta);
232 printf(" fTheta %f : %5.2f : cos(theta) %f\n",
233 fTheta, GetThetaInDegree(),TMath::Cos(fTheta));
235 printf(" %i |%s| theta %f : fOK.Phi = %f(%5.2f)\n",
236 GetUniqueID(), GetName(), fTheta, fOK.Phi(),fOK.Phi()*TMath::RadToDeg());
237 printf(" A %f B %f | fThetaA %7.6f(%5.2f)\n", fA,fB, fThetaA,fThetaA*TMath::RadToDeg());
238 printf(" fOK : X %9.4f: Y %9.4f : eta %5.3f\n", fOK.X(), fOK.Y(), GetEtaOfCenterOfModule());
239 printf(" fOK1 : X %9.4f: Y %9.4f : (local, ieta=2)\n", fOK1.X(), fOK1.Y());
240 printf(" fOK2 : X %9.4f: Y %9.4f : (local, ieta=1)\n\n", fOK2.X(), fOK2.Y());
241 printf(" fOB : X %9.4f: Y %9.4f \n", fOB.X(), fOB.Y());
242 printf(" fOB1 : X %9.4f: Y %9.4f (local, ieta=2)\n", fOB1.X(), fOB1.Y());
243 printf(" fOB2 : X %9.4f: Y %9.4f (local, ieta=1)\n", fOB2.X(), fOB2.Y());
246 for(int ieta=0; ieta<3; ieta++) {
247 printf(" fOK3X3[%i] : X %9.4f: Y %9.4f (local) \n", ieta, fOK3X3[ieta].X(), fOK3X3[ieta].Y());
250 GetMaxEtaOfModule(pri);
255 //_____________________________________________________________________________
256 Double_t AliEMCALShishKebabTrd1Module::GetThetaInDegree() const
258 return fTheta*TMath::RadToDeg();
261 //_____________________________________________________________________________
262 Double_t AliEMCALShishKebabTrd1Module::GetEtaOfCenterOfModule() const
264 return -TMath::Log(TMath::Tan(fOK.Phi()/2.));
267 //_____________________________________________________________________________
268 Double_t AliEMCALShishKebabTrd1Module::GetMaxEtaOfModule(int pri) const
270 // Right bottom point of module
271 Double_t xBottom = (fgr - fB) / fA;
272 Double_t thetaBottom = TMath::ATan2(fgr, xBottom);
273 Double_t etaBottom = ThetaToEta(thetaBottom);
274 // Right top point of module
275 Double_t l = fgb / TMath::Cos(fgangle/2.); // length of lateral module side
276 Double_t xTop = xBottom + l*TMath::Cos(TMath::ATan(fA));
277 Double_t yTop = fA*xTop + fB;
278 Double_t thetaTop = TMath::ATan2(yTop, xTop);
279 Double_t etaTop = ThetaToEta(thetaTop);
282 printf(" Right bottom point of module : eta %5.4f : theta %6.4f (%6.2f) \n",
283 etaBottom, thetaBottom, thetaBottom * TMath::RadToDeg());
284 printf(" Right top point of module : eta %5.4f : theta %6.4f (%6.2f) \n",
285 etaTop, thetaTop, thetaTop * TMath::RadToDeg());
287 return etaBottom>etaTop ? etaBottom : etaTop;