1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
17 #include <TGeometry.h>
22 #include <TObjArray.h>
25 #include "AliRICHParam.h"
26 #include "AliRICHRecHit1D.h"
28 #include <AliRunDigitizer.h>
31 //__________________________________________________________________________________________________
32 void AliRICHhit::Print(Option_t*)const
34 Info("","chamber=%2i, PID=%9i, TID=%6i, eloss=%9.3f eV",fChamber,fPid,fTrack,fEloss*1e9);
35 }//void AliRICHdigit::Print(Option_t *option)const
36 //__________________________________________________________________________________________________
37 ClassImp(AliRICHdigit)
38 //__________________________________________________________________________________________________
39 void AliRICHdigit::Print(Option_t*)const
41 Info("","ID=%6i, chamber=%2i, PadX=%3i, PadY=%3i, Qdc=%4i, TID1=%5i, TID2=%5i, TID3=%5i",
42 Id(),fChamber,fPadX,fPadY,fQdc,fTracks[0],fTracks[1],fTracks[2]);
43 }//void AliRICHdigit::Print(Option_t *option)const
44 //__________________________________________________________________________________________________
47 //__________________________________________________________________________________________________
51 <img src="gif/alirich.gif">
54 //__________________________________________________________________________________________________
57 {//Default ctor should not contain any new operators
60 //AliDetector ctor deals with Hits and Digits
61 fSdigits =0; fNsdigits =0;
62 fDigitsNew =0; for(int i=0;i<kNCH;i++) fNdigitsNew[i] =0;
63 fClusters =0; for(int i=0;i<kNCH;i++) fNclusters[i]=0;
65 fCerenkovs =0; fNcerenkovs =0;
66 fSpecials =0; fNspecials =0;
67 fDchambers =0; for(int i=0;i<kNCH;i++) fNdch[i]=0;
68 fRawClusters=0; for(int i=0;i<kNCH;i++) fNrawch[i]=0;
69 fRecHits1D =0; for(int i=0;i<kNCH;i++) fNrechits1D[i]=0;
70 fCkovNumber=fFreonProd=0;
72 //__________________________________________________________________________________________________
73 AliRICH::AliRICH(const char *name, const char *title)
74 :AliDetector(name,title)
76 if(GetDebug())Info("named ctor","Start.");
77 fpParam = new AliRICHParam;
78 fChambers = 0; CreateChambers();
79 //AliDetector ctor deals with Hits and Digits (reset them to 0, does not create them)
80 fHits= 0; CreateHits(); gAlice->AddHitList(fHits);
85 fCerenkovs= 0; CreateCerenkovsOld(); gAlice->AddHitList(fCerenkovs);
86 fSpecials= 0; CreateSpecialsOld();
87 fDchambers= 0; //CreateDigitsOld();
88 fRawClusters=0; //CreateRawClustersOld();
89 fRecHits1D= 0; //CreateRecos1Old();
91 fCkovNumber=fFreonProd=0;
92 if(GetDebug())Info("named ctor","Stop.");
93 }//AliRICH::AliRICH(const char *name, const char *title)
94 //__________________________________________________________________________________________________
97 if(GetDebug()) Info("dtor","Start.");
99 if(fpParam) delete fpParam;
100 if(fChambers) delete fChambers;
102 if(fHits) delete fHits;
103 if(fSdigits) delete fSdigits;
104 if(fDigits) delete fDigits;
105 if(fDigitsNew) {fDigitsNew->Delete(); delete fDigitsNew;}
106 if(fClusters) {fClusters->Delete(); delete fClusters;}
108 if(fCerenkovs) delete fCerenkovs;
109 if(fSpecials) delete fSpecials;
110 if(fDchambers) {fDchambers->Delete(); delete fDchambers;}
111 if(fRawClusters) {fRawClusters->Delete(); delete fRawClusters;}
112 if(fRecHits1D) {fRecHits1D->Delete(); delete fRecHits1D;}
113 if(GetDebug()) Info("dtor","Stop.");
114 }//AliRICH::~AliRICH()
115 //__________________________________________________________________________________________________
116 void AliRICH::Hits2SDigits()
117 {//Create a list of sdigits corresponding to list of hits. Every hit generates one or more sdigits.
118 if(GetDebug()) Info("Hit2SDigits","Start.");
119 GetLoader()->LoadHits();
121 for(Int_t iEventN=0;iEventN<gAlice->GetEventsPerRun();iEventN++){//events loop
122 gAlice->GetRunLoader()->GetEvent(iEventN);
124 GetLoader()->MakeTree("S"); MakeBranch("S");
125 ResetSdigits(); ResetSpecialsOld();
127 for(Int_t iPrimN=0;iPrimN<GetLoader()->TreeH()->GetEntries();iPrimN++){//prims loop
128 GetLoader()->TreeH()->GetEntry(iPrimN);
129 for(Int_t i=0;i<Specials()->GetEntries();i++){//specials loop
130 Int_t padx= ((AliRICHSDigit*)Specials()->At(i))->PadX();
131 Int_t pady= ((AliRICHSDigit*)Specials()->At(i))->PadY();
132 Int_t qdc= ((AliRICHSDigit*)Specials()->At(i))->QPad();
133 Int_t hitN= ((AliRICHSDigit*)Specials()->At(i))->HitNumber()-1;//!!! important -1
134 Int_t chamber=((AliRICHhit*)Hits()->At(hitN))->C();
135 Int_t track=((AliRICHhit*)Hits()->At(hitN))->GetTrack();
136 AddSdigit(chamber,padx+Param()->NpadsX()/2,pady+Param()->NpadsY()/2,qdc,track);
139 GetLoader()->TreeS()->Fill();
140 GetLoader()->WriteSDigits("OVERWRITE");
141 if(GetDebug()) Info("Hit2SDigits","Event %i processed.",iEventN);
143 GetLoader()->UnloadHits(); GetLoader()->UnloadSDigits();
144 ResetHits(); ResetSdigits();
145 if(GetDebug()) Info("Hit2SDigits","Stop.");
146 }//void AliRICH::Hits2SDigits()
147 //__________________________________________________________________________________________________
148 void AliRICH::SDigits2Digits()
149 {//Generate digits from sdigits.
150 if(GetDebug()) Info("SDigits2Digits","Start.");
152 GetLoader()->LoadSDigits();
154 for(Int_t iEventN=0;iEventN<gAlice->GetEventsPerRun();iEventN++){//events loop
155 gAlice->GetRunLoader()->GetEvent(iEventN);
157 GetLoader()->MakeTree("D"); MakeBranch("D"); //create TreeD with RICH branches
158 ResetSdigits();ResetDigitsOld();//reset lists of sdigits and digits
159 GetLoader()->TreeS()->GetEntry(0);
164 Int_t tr[3],q[3],dig[5]; for(Int_t i=0;i<3;i++) tr[i]=q[i]=kBad; for(Int_t i=0;i<5;i++) dig[i]=kBad;
165 Int_t chamber=kBad,id=kBad,iNdigitsPerPad=kBad;//how many sdigits for a given pad
167 for(Int_t i=0;i<Sdigits()->GetEntries();i++){//sdigits loop (sorted)
168 AliRICHdigit *pSdig=(AliRICHdigit*)Sdigits()->At(i);
169 if(pSdig->Id()==id){//still the same pad
171 dig[2]+=pSdig->Qdc();//sum up qdc
172 if(iNdigitsPerPad<=3)
173 tr[iNdigitsPerPad-1]=pSdig->T(0);
175 Info("","More then 3 sdigits for the given pad");
176 }else{//new pad, add the pevious one
177 if(id!=kBad) AddDigitOld(chamber,tr,q,dig);
178 chamber=pSdig->C();dig[0]=pSdig->X();dig[1]=pSdig->Y();dig[2]=pSdig->Qdc();tr[0]=pSdig->T(0);id=pSdig->Id();
179 iNdigitsPerPad=1;tr[1]=tr[2]=kBad;
181 }//sdigits loop (sorted)
182 AddDigitOld(chamber,tr,q,dig);//add the last digit
184 GetLoader()->TreeD()->Fill();
185 GetLoader()->WriteDigits("OVERWRITE");
186 if(GetDebug()) Info("SDigits2Digits","Event %i processed.",iEventN);
188 GetLoader()->UnloadSDigits(); GetLoader()->UnloadDigits();
189 ResetSdigits(); ResetDigitsOld();
190 if(GetDebug()) Info("SDigits2Digits","Stop.");
191 }//void AliRICH::SDigits2Digits()
192 //__________________________________________________________________________________________________
193 void AliRICH::Digits2Reco()
194 {//Generate clusters from digits then generate recos from clusters or digits
195 if(GetDebug()) Info("Digits2reco","Start.");
197 }//void AliRICH::Digits2Reco()
198 //__________________________________________________________________________________________________
199 void AliRICH::AddRecHit1D(Int_t id, Float_t *rechit, Float_t *photons, Int_t *padsx, Int_t* padsy)
200 {// Add a RICH reconstructed hit to the list
202 TClonesArray &lrec1D = *((TClonesArray*)fRecHits1D->At(id));
203 new(lrec1D[fNrechits1D[id]++]) AliRICHRecHit1D(id,rechit,photons,padsx,padsy);
205 //_____________________________________________________________________________
206 void AliRICH::BuildGeometry()
207 {//Builds a TNode geometry for event display
208 if(GetDebug())Info("BuildGeometry","Start.");
210 TNode *node, *subnode, *top;
211 top=gAlice->GetGeometry()->GetNode("alice");
213 new TBRIK("S_RICH","S_RICH","void",71.09999,11.5,73.15);
215 Float_t wid=Param()->SectorSizeX();
216 Float_t len=Param()->SectorSizeY();
217 new TBRIK("PHOTO","PHOTO","void",wid/2,0.1,len/2);
219 for(int i=1;i<=kNCH;i++){
221 node = new TNode(Form("RICH%i",i),Form("RICH%i",i),"S_RICH",C(i)->X(),C(i)->Y(),C(i)->Z(),C(i)->RotMatrixName());
222 node->SetLineColor(kRed);
224 subnode = new TNode("PHOTO1","PHOTO1","PHOTO",wid+Param()->DeadZone(),5,len/2+Param()->DeadZone()/2,"");
225 subnode->SetLineColor(kGreen);
226 fNodes->Add(subnode);
227 subnode = new TNode("PHOTO1","PHOTO1","PHOTO",0,5,len/2+Param()->DeadZone()/2,"");
228 subnode->SetLineColor(kGreen);
229 fNodes->Add(subnode);
230 subnode = new TNode("PHOTO1","PHOTO1","PHOTO",-wid-Param()->DeadZone(),5,len/2+Param()->DeadZone()/2,"");
231 subnode->SetLineColor(kGreen);
232 fNodes->Add(subnode);
233 subnode = new TNode("PHOTO1","PHOTO1","PHOTO",wid+Param()->DeadZone(),5,-len/2-Param()->DeadZone()/2,"");
234 subnode->SetLineColor(kGreen);
235 fNodes->Add(subnode);
236 subnode = new TNode("PHOTO1","PHOTO1","PHOTO",0,5,-len/2 -Param()->DeadZone()/2,"");
237 subnode->SetLineColor(kGreen);
238 fNodes->Add(subnode);
239 subnode = new TNode("PHOTO1","PHOTO1","PHOTO",-wid-Param()->DeadZone(),5,-len/2 - Param()->DeadZone()/2,"");
240 subnode->SetLineColor(kGreen);
241 fNodes->Add(subnode);
244 if(GetDebug())Info("BuildGeometry","Stop.");
245 }//void AliRICH::BuildGeometry()
249 //______________________________________________________________________________
250 void AliRICH::CreateMaterials()
253 // *** DEFINITION OF AVAILABLE RICH MATERIALS ***
254 // ORIGIN : NICK VAN EIJNDHOVEN
255 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
256 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
257 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
261 //Photons energy intervals
265 ppckov[i] = (Float_t(i)*0.1+5.5)*1e-9;
269 //Refraction index for quarz
270 Float_t rIndexQuarz[26];
277 Float_t ene=ppckov[i]*1e9;
278 Float_t a=f1/(e1*e1 - ene*ene);
279 Float_t b=f2/(e2*e2 - ene*ene);
280 rIndexQuarz[i] = TMath::Sqrt(1. + a + b );
283 //Refraction index for opaque quarz, methane and grid
284 Float_t rIndexOpaqueQuarz[26];
285 Float_t rIndexMethane[26];
286 Float_t rIndexGrid[26];
289 rIndexOpaqueQuarz[i]=1;
290 rIndexMethane[i]=1.000444;
294 //Absorption index for freon
295 Float_t abscoFreon[26] = {179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987,
296 179.0987, 142.9206, 56.64957, 25.58622, 13.95293, 12.03905, 10.42953, 8.804196,
297 7.069031, 4.461292, 2.028366, 1.293013, .577267, .40746, .334964, 0., 0., 0.};
300 Float_t abscoQuarz [26] = {105.8, 65.52, 48.58, 42.85, 35.79, 31.262, 28.598, 27.527, 25.007, 22.815, 21.004,
301 19.266, 17.525, 15.878, 14.177, 11.719, 9.282, 6.62, 4.0925, 2.601, 1.149, .667, .3627,
302 .192, .1497, .10857};
304 //Absorption index for methane
305 Float_t abscoMethane[26];
308 abscoMethane[i]=AbsoCH4(ppckov[i]*1e9);
311 //Absorption index for opaque quarz, csi and grid, efficiency for all and grid
312 Float_t abscoOpaqueQuarz[26];
313 Float_t abscoCsI[26];
314 Float_t abscoGrid[26];
315 Float_t efficAll[26];
316 Float_t efficGrid[26];
319 abscoOpaqueQuarz[i]=1e-5;
328 Float_t efficCsI[26] = {0.000199999995, 0.000600000028, 0.000699999975, 0.00499999989, 0.00749999983, 0.010125,
329 0.0242999997, 0.0405000001, 0.0688500032, 0.105299994, 0.121500008, 0.141749993, 0.157949999,
330 0.162, 0.166050002, 0.167669997, 0.174299985, 0.176789999, 0.179279998, 0.182599992, 0.18592,
331 0.187579989, 0.189239994, 0.190899998, 0.207499996, 0.215799987};
335 //FRESNEL LOSS CORRECTION FOR PERPENDICULAR INCIDENCE AND
336 //UNPOLARIZED PHOTONS
340 efficCsI[i] = efficCsI[i]/(1.-Fresnel(ppckov[i]*1e9,1.,0));
343 /*******************************************End of rich_media.f***************************************/
345 Float_t rIndexFreon[26];
348 // --- Photon energy (GeV)
349 // --- Refraction indexes
350 for (i = 0; i < 26; ++i) {
351 rIndexFreon[i] = ppckov[i] * .0172 * 1e9 + 1.177;
352 //rIndexFreon[i] = 1;
356 Float_t a=0,z=0,den=0,radl=0,absl=0;
357 Float_t tmaxfd=-10.0, deemax=-0.2, stemax=-0.1,epsil=0.001, stmin=-0.001;
358 Int_t isxfld = gAlice->Field()->Integ();
359 Float_t sxmgmx = gAlice->Field()->Max();
361 AliMaterial( 1, "Air $",a=14.61,z=7.3, den=0.001205,radl=30420.0,absl=67500);//(Air)
362 AliMedium(1, "DEFAULT MEDIUM AIR$", 1, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
364 AliMaterial( 6, "HON", a=12.01,z=6.0, den=0.1, radl=18.8, absl=0); //(C)-equivalent radl
365 AliMedium(2, "HONEYCOMB$", 6, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
367 AliMaterial(16, "CSI", a=12.01,z=6.0, den=0.1, radl=18.8, absl=0); //CsI-radl equivalent
368 AliMedium(kCSI, "CSI$", 16, 1, isxfld, sxmgmx,tmaxfd, stemax, deemax, epsil, stmin);
370 AliMaterial(11, "GRI", a=63.54,z=29.0,den=8.96, radl=1.43, absl=0); //anode grid (Cu)
371 AliMedium(7, "GRIGLIA$", 11, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
373 AliMaterial(50, "ALUM", a=26.98,z=13.0,den=2.7, radl=8.9, absl=0); //aluminium sheet (Al)
374 AliMedium(10, "ALUMINUM$", 50, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
376 AliMaterial(31, "COPPER$", a=63.54,z=29.0,den=8.96, radl=1.4, absl=0); //(Cu)
377 AliMedium(12, "PCB_COPPER", 31, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
379 Float_t aQuartz[2]={28.09,16.0}; Float_t zQuartz[2]={14.00, 8.0}; Float_t wmatQuartz[2]={1,2};
380 AliMixture (20, "QUA",aQuartz,zQuartz,den=2.64,-2, wmatQuartz);//Quarz (SiO2) - trasnparent
381 AliMedium(3, "QUARZO$", 20, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
383 AliMixture (21, "QUAO",aQuartz, zQuartz, den=2.64, -2, wmatQuartz);//Quarz (SiO2) - opaque
384 AliMedium(8, "QUARZOO$", 21, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
386 Float_t aFreon[2]={12,19}; Float_t zFreon[2]={6,9}; Float_t wmatFreon[2]={6,14};
387 AliMixture (30, "FRE",aFreon,zFreon,den=1.7,-2,wmatFreon);//Freon (C6F14)
388 AliMedium(4, "FREON$", 30, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
390 Float_t aMethane[2]={12.01,1}; Float_t zMethane[2]={6,1}; Float_t wmatMethane[2]={1,4};
391 AliMixture (40, "MET", aMethane, zMethane, den=7.17e-4,-2, wmatMethane);//methane (CH4)
392 AliMedium(5, "METANO$", 40, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
394 AliMixture (41, "METG", aMethane, zMethane, den=7.17e-4, -2, wmatMethane);
395 AliMedium(kGAP, "GAP$", 41, 1, isxfld, sxmgmx,tmaxfd, 0.1, -deemax, epsil, -stmin);
397 Float_t aGlass[5]={12.01, 28.09, 16., 10.8, 23.};
398 Float_t zGlass[5]={ 6., 14., 8., 5., 11.};
399 Float_t wGlass[5]={ 0.5, 0.105, 0.355, 0.03, 0.01};
400 AliMixture (32, "GLASS",aGlass, zGlass, den=1.74, 5, wGlass);//Glass 50%C+10.5%Si+35.5%O+3% + 1%
401 AliMedium(11, "GLASS", 32, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
403 Int_t *idtmed = fIdtmed->GetArray()-999;
404 gMC->SetCerenkov(idtmed[1000], 26, ppckov, abscoMethane, efficAll, rIndexMethane);
405 gMC->SetCerenkov(idtmed[1001], 26, ppckov, abscoMethane, efficAll, rIndexMethane);
406 gMC->SetCerenkov(idtmed[1002], 26, ppckov, abscoQuarz, efficAll, rIndexQuarz);
407 gMC->SetCerenkov(idtmed[1003], 26, ppckov, abscoFreon, efficAll, rIndexFreon);
408 gMC->SetCerenkov(idtmed[1004], 26, ppckov, abscoMethane, efficAll, rIndexMethane);
409 gMC->SetCerenkov(idtmed[1005], 26, ppckov, abscoCsI, efficCsI, rIndexMethane);
410 gMC->SetCerenkov(idtmed[1006], 26, ppckov, abscoGrid, efficGrid, rIndexGrid);
411 gMC->SetCerenkov(idtmed[1007], 26, ppckov, abscoOpaqueQuarz, efficAll, rIndexOpaqueQuarz);
412 gMC->SetCerenkov(idtmed[1008], 26, ppckov, abscoMethane, efficAll, rIndexMethane);
413 gMC->SetCerenkov(idtmed[1009], 26, ppckov, abscoGrid, efficGrid, rIndexGrid);
414 gMC->SetCerenkov(idtmed[1010], 26, ppckov, abscoOpaqueQuarz, efficAll, rIndexOpaqueQuarz);
415 }//void AliRICH::CreateMaterials()
416 //__________________________________________________________________________________________________
417 Float_t AliRICH::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
420 //ENE(EV), PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
422 Float_t en[36] = {5.0,5.1,5.2,5.3,5.4,5.5,5.6,5.7,5.8,5.9,6.0,6.1,6.2,
423 6.3,6.4,6.5,6.6,6.7,6.8,6.9,7.0,7.1,7.2,7.3,7.4,7.5,7.6,7.7,
424 7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
425 Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
426 2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
427 2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
429 Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
430 0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
431 0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
434 Int_t j=Int_t(xe*10)-49;
435 Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
436 Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
438 //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
439 //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
441 Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
442 Float_t tanin=sinin/pdoti;
444 Float_t c1=cn*cn-ck*ck-sinin*sinin;
445 Float_t c2=4*cn*cn*ck*ck;
446 Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
447 Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
449 Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
450 Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
453 //CORRECTION FACTOR FOR SURFACE ROUGHNESS
454 //B.J. STAGG APPLIED OPTICS, 30(1991),4113
457 Float_t lamb=1240/ene;
460 Float_t rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
464 Float_t pdotr=0.8; //DEGREE OF POLARIZATION : 1->P , -1->S
465 fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
472 }//Float_t AliRICH::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
473 //__________________________________________________________________________________________________
474 Float_t AliRICH::AbsoCH4(Float_t x)
477 //KLOSCH,SCH4(9),WL(9),EM(9),ALENGTH(31)
478 Float_t sch4[9] = {.12,.16,.23,.38,.86,2.8,7.9,28.,80.}; //MB X 10^22
479 //Float_t wl[9] = {153.,152.,151.,150.,149.,148.,147.,146.,145};
480 Float_t em[9] = {8.1,8.158,8.212,8.267,8.322,8.378,8.435,8.493,8.55};
481 const Float_t kLosch=2.686763E19; // LOSCHMIDT NUMBER IN CM-3
482 const Float_t kIgas1=100, kIgas2=0, kOxy=10., kWater=5., kPressure=750.,kTemperature=283.;
483 Float_t pn=kPressure/760.;
484 Float_t tn=kTemperature/273.16;
487 // ------- METHANE CROSS SECTION -----------------
488 // ASTROPH. J. 214, L47 (1978)
494 if(x>=7.75 && x<=8.1)
496 Float_t c0=-1.655279e-1;
497 Float_t c1=6.307392e-2;
498 Float_t c2=-8.011441e-3;
499 Float_t c3=3.392126e-4;
500 sm=(c0+c1*x+c2*x*x+c3*x*x*x)*1.e-18;
506 while (x<=em[j] && x>=em[j+1])
509 Float_t a=(sch4[j+1]-sch4[j])/(em[j+1]-em[j]);
510 sm=(sch4[j]+a*(x-em[j]))*1e-22;
514 Float_t dm=(kIgas1/100.)*(1.-((kOxy+kWater)/1.e6))*kLosch*pn/tn;
515 Float_t abslm=1./sm/dm;
517 // ------- ISOBUTHANE CROSS SECTION --------------
518 // i-C4H10 (ai) abs. length from curves in
519 // Lu-McDonald paper for BARI RICH workshop .
520 // -----------------------------------------------------------
529 if(x>=7.25 && x<7.375)
535 Float_t si = 1./(ai*kLosch*273.16/293.); // ISOB. CRO.SEC.IN CM2
536 Float_t di=(kIgas2/100.)*(1.-((kOxy+kWater)/1.e6))*kLosch*pn/tn;
541 // ---------------------------------------------------------
543 // transmission of O2
545 // y= path in cm, x=energy in eV
546 // so= cross section for UV absorption in cm2
547 // do= O2 molecular density in cm-3
548 // ---------------------------------------------------------
556 so=3.392709e-13 * TMath::Exp(2.864104 *x);
562 so=2.910039e-34 * TMath::Exp(10.3337*x);
569 Float_t a0=-73770.76;
571 Float_t a2=-11475.44;
573 Float_t a4=-86.07027;
575 so= a0+(a1*x)+(a2*x*x)+(a3*x*x*x)+(a4*x*x*x*x)+(a5*x*x*x*x*x);
579 Float_t dox=(kOxy/1e6)*kLosch*pn/tn;
584 // ---------------------------------------------------------
586 // transmission of H2O
588 // y= path in cm, x=energy in eV
589 // sw= cross section for UV absorption in cm2
590 // dw= H2O molecular density in cm-3
591 // ---------------------------------------------------------
596 Float_t b1=-15807.74;
598 Float_t b3=-285.4809;
603 Float_t sw= b0+(b1*x)+(b2*x*x)+(b3*x*x*x)+(b4*x*x*x*x);
605 Float_t dw=(kWater/1e6)*kLosch*pn/tn;
611 // ---------------------------------------------------------
613 Float_t alength=1./(1./abslm+1./absli+1./abslo+1./abslw);
616 //__________________________________________________________________________________________________
617 void AliRICH::MakeBranch(Option_t* option)
618 {//Create Tree branches for the RICH.
619 if(GetDebug())Info("MakeBranch","Start with option= %s.",option);
621 const Int_t kBufferSize = 4000;
623 const char *cH = strstr(option,"H");
624 const char *cD = strstr(option,"D");
625 const char *cR = strstr(option,"R");
626 const char *cS = strstr(option,"S");
629 CreateHits(); //branch will be created in AliDetector::MakeBranch
630 CreateCerenkovsOld(); MakeBranchInTree(TreeH(),"RICHCerenkov", &fCerenkovs, kBufferSize,0);
631 CreateSpecialsOld(); MakeBranchInTree(TreeH(),"RICHSpecials", &fSpecials,kBufferSize,0);
633 AliDetector::MakeBranch(option);//this is after cH because we need to guarantee that fHits array is created
635 if(cS&&fLoader->TreeS()){//S
636 CreateSdigits(); MakeBranchInTree(fLoader->TreeS(),"RICH",&fSdigits,kBufferSize,0) ;
639 if(cD&&fLoader->TreeD()){//D
642 for(int i=0;i<kNCH;i++){
643 MakeBranchInTree(fLoader->TreeD(),Form("%sDigits%d",GetName(),i+1),&((*fDchambers)[i]),kBufferSize,0);
644 MakeBranchInTree(fLoader->TreeD(),Form("%s%d",GetName(),i+1),&((*fDigitsNew)[i]),kBufferSize,0);
648 if(cR&&fLoader->TreeR()){//R
649 CreateRawClustersOld();
650 for(int i=0; i<kNCH ;i++)
651 MakeBranchInTree(fLoader->TreeR(),Form("%sRawClusters%d",GetName(),i+1), &((*fRawClusters)[i]), kBufferSize, 0);
654 for(int i=0; i<kNCH ;i++)
655 MakeBranchInTree(fLoader->TreeR(),Form("%sRecHits1D%d",GetName(),i+1),&((*fRecHits1D)[i]),kBufferSize,0);
657 if(GetDebug())Info("MakeBranch","Stop.");
658 }//void AliRICH::MakeBranch(Option_t* option)
659 //__________________________________________________________________________________________________
660 void AliRICH::SetTreeAddress()
661 {//Set branch address for the Hits and Digits Tree.
662 if(GetDebug())Info("SetTreeAddress","Start.");
666 if(fLoader->TreeH()){//H
667 if(GetDebug())Info("SetTreeAddress","tree H is requested.");
668 CreateHits();//branch map will be in AliDetector::SetTreeAddress
669 branch=fLoader->TreeH()->GetBranch("RICHCerenkov"); if(branch){CreateCerenkovsOld(); branch->SetAddress(&fCerenkovs);}
670 branch=fLoader->TreeH()->GetBranch("RICHSpecials"); if(branch){CreateSpecialsOld(); branch->SetAddress(&fSpecials);}
672 AliDetector::SetTreeAddress();//this is after TreeH because we need to guarantee that fHits array is created
674 if(fLoader->TreeS()){//S
675 if(GetDebug())Info("SetTreeAddress","tree S is requested.");
676 branch=fLoader->TreeS()->GetBranch(GetName()); if(branch){CreateSdigits(); branch->SetAddress(&fSdigits);}
679 if(fLoader->TreeD()){//D
680 if(GetDebug())Info("SetTreeAddress","tree D is requested.");
681 for(int i=0;i<kNCH;i++){
682 branch=fLoader->TreeD()->GetBranch(Form("%s%d",GetName(),i+1));
683 if(branch){CreateDigits(); branch->SetAddress(&((*fDigitsNew)[i]));}
685 branch=fLoader->TreeD()->GetBranch(Form("%sDigits%d",GetName(),i+1));
686 if(branch){CreateDigitsOld(); branch->SetAddress(&((*fDchambers)[i]));}
690 if(fLoader->TreeR()){//R
691 if(GetDebug())Info("SetTreeAddress","tree R is requested.");
693 for(int i=0;i<kNCH;i++){
694 branch=fLoader->TreeR()->GetBranch(Form("%sClusters%d" ,GetName(),i+1));
695 if(branch){CreateClusters(); branch->SetAddress(&((*fRawClusters)[i]));}
698 for(int i=0;i<kNCH;i++) {
699 branch=fLoader->TreeR()->GetBranch(Form("%sRawClusters%d" ,GetName(),i+1));
700 if(branch){CreateRawClustersOld(); branch->SetAddress(&((*fRawClusters)[i]));}
702 branch=fLoader->TreeR()->GetBranch(Form("%sRecHits1D%d",GetName(),i+1));
703 if(branch){CreateRecos1Old(); branch->SetAddress(&((*fRecHits1D)[i]));}
706 if(GetDebug())Info("SetTreeAddress","Stop.");
707 }//void AliRICH::SetTreeAddress()
708 //__________________________________________________________________________________________________
709 void AliRICH::Print(Option_t *option)const
711 TObject::Print(option);
713 fChambers->Print(option);
714 }//void AliRICH::Print(Option_t *option)const
715 //__________________________________________________________________________________________________
716 void AliRICH::CreateGeometry()
717 {//Creates detailed geometry simulation (currently GEANT volumes tree)
718 if(GetDebug())Info("CreateGeometry","Start.");
719 //Opaque quartz thickness
720 Float_t oqua_thickness = .5;
722 Float_t pcX=Param()->PcSizeX();
723 Float_t pcY=Param()->PcSizeY();
725 Int_t *idtmed = fIdtmed->GetArray()-999;
732 //External aluminium box
733 par[0]=68.8*kcm;par[1]=13*kcm;par[2]=70.86*kcm; gMC->Gsvolu("RICH", "BOX ", idtmed[1009], par, 3);
735 par[0]=66.3; par[1] = 13; par[2] = 68.35; gMC->Gsvolu("SRIC", "BOX ", idtmed[1000], par, 3);
736 //Air 2 (cutting the lower part of the box)
737 par[0]=1.25; par[1] = 3; par[2] = 70.86; gMC->Gsvolu("AIR2", "BOX ", idtmed[1000], par, 3);
738 //Air 3 (cutting the lower part of the box)
739 par[0]=66.3; par[1] = 3; par[2] = 1.2505; gMC->Gsvolu("AIR3", "BOX ", idtmed[1000], par, 3);
741 par[0]=66.3;par[1]=0.188; par[2] = 68.35; gMC->Gsvolu("HONE", "BOX ", idtmed[1001], par, 3);
743 par[0]=66.3;par[1]=0.025;par[2]=68.35; gMC->Gsvolu("ALUM", "BOX ", idtmed[1009], par, 3);
744 //par[0] = 66.5; par[1] = .025; par[2] = 63.1;
746 par[0]=Param()->QuartzWidth()/2;par[1]=Param()->QuartzThickness()/2;par[2]=Param()->QuartzLength()/2;
747 gMC->Gsvolu("QUAR", "BOX ", idtmed[1002], par, 3);
748 //Spacers (cylinders)
749 par[0]=0.;par[1]=.5;par[2]=Param()->FreonThickness()/2; gMC->Gsvolu("SPAC", "TUBE", idtmed[1002], par, 3);
750 //Feet (freon slabs supports)
751 par[0] = .7; par[1] = .3; par[2] = 1.9; gMC->Gsvolu("FOOT", "BOX", idtmed[1009], par, 3);
753 par[0]=Param()->QuartzWidth()/2;par[1]= .2;par[2]=Param()->QuartzLength()/2;
754 gMC->Gsvolu("OQUA", "BOX ", idtmed[1007], par, 3);
755 //Frame of opaque quartz
756 par[0]=Param()->OuterFreonWidth()/2;par[1]=Param()->FreonThickness()/2;par[2]=Param()->OuterFreonLength()/2;
757 gMC->Gsvolu("OQF1", "BOX ", idtmed[1007], par, 3);
758 par[0]=Param()->InnerFreonWidth()/2;par[1]=Param()->FreonThickness()/2;par[2]=Param()->InnerFreonLength()/2;
759 gMC->Gsvolu("OQF2", "BOX ", idtmed[1007], par, 3);
761 par[0]=Param()->OuterFreonWidth()/2 - oqua_thickness;
762 par[1]=Param()->FreonThickness()/2;
763 par[2]=Param()->OuterFreonLength()/2 - 2*oqua_thickness;
764 gMC->Gsvolu("FRE1", "BOX ", idtmed[1003], par, 3);
766 par[0]=Param()->InnerFreonWidth()/2 - oqua_thickness;
767 par[1]=Param()->FreonThickness()/2;
768 par[2]=Param()->InnerFreonLength()/2 - 2*oqua_thickness;
769 gMC->Gsvolu("FRE2", "BOX ", idtmed[1003], par, 3);
771 par[0]=pcX/2;par[1]=Param()->GapThickness()/2;par[2]=pcY/2; gMC->Gsvolu("META","BOX ",idtmed[1004], par, 3);
773 par[0]=pcX/2;par[1]=Param()->ProximityGapThickness()/2;par[2]=pcY/2;gMC->Gsvolu("GAP ","BOX ",(*fIdtmed)[kGAP],par,3);
775 par[0]=pcX/2;par[1]=.25;par[2]=pcY/2; gMC->Gsvolu("CSI ", "BOX ", (*fIdtmed)[kCSI], par, 3);
777 par[0] = 0.;par[1] = .001;par[2] = 20.; gMC->Gsvolu("GRID", "TUBE", idtmed[1006], par, 3);
781 par[0]=pcX/2;par[1]=1.05;par[2]=1.05; gMC->Gsvolu("WSMe", "BOX ", idtmed[1009], par, 3);
782 //Ceramic pick up (base)
783 par[0]=pcX/2;par[1]= .25;par[2]=1.05; gMC->Gsvolu("WSG1", "BOX ", idtmed[1010], par, 3);
784 //Ceramic pick up (head)
785 par[0] = pcX/2;par[1] = .1;par[2] = .1; gMC->Gsvolu("WSG2", "BOX ", idtmed[1010], par, 3);
787 //Aluminium supports for methane and CsI
789 par[0]=pcX/2;par[1]=Param()->GapThickness()/2 + .25; par[2] = (68.35 - pcY/2)/2;
790 gMC->Gsvolu("SMSH", "BOX", idtmed[1009], par, 3);
792 par[0]=(66.3 - pcX/2)/2;par[1]=Param()->GapThickness()/2+.25;par[2]=pcY/2+68.35-pcY/2;
793 gMC->Gsvolu("SMLG", "BOX", idtmed[1009], par, 3);
795 //Aluminium supports for freon
797 par[0] = Param()->QuartzWidth()/2; par[1] = .3; par[2] = (68.35 - Param()->QuartzLength()/2)/2;
798 gMC->Gsvolu("SFSH", "BOX", idtmed[1009], par, 3);
800 par[0] = (66.3 - Param()->QuartzWidth()/2)/2; par[1] = .3;
801 par[2] = Param()->QuartzLength()/2 + 68.35 - Param()->QuartzLength()/2;
802 gMC->Gsvolu("SFLG", "BOX", idtmed[1009], par, 3);
804 par[0] = pcX/2;par[1] = .25; par[2] = pcY/4 -.5025; gMC->Gsvolu("PCB ", "BOX", idtmed[1011], par, 3);
808 par[0] = 33.15;par[1] = 2;par[2] = 21.65; gMC->Gsvolu("BACK", "BOX", idtmed[1009], par, 3);
810 par[0] = 9.05; par[1] = 2; par[2] = 4.4625; gMC->Gsvolu("BKHL", "BOX", idtmed[1000], par, 3);
812 par[0] = 5.7;par[1] = 2;par[2] = 4.4625; gMC->Gsvolu("BKHS", "BOX", idtmed[1000], par, 3);
813 //Place holes inside backplane support
814 gMC->Gspos("BKHS", 1, "BACK", .8 + 5.7,0., .6 + 4.4625, 0, "ONLY");
815 gMC->Gspos("BKHS", 2, "BACK", -.8 - 5.7,0., .6 + 4.4625, 0, "ONLY");
816 gMC->Gspos("BKHS", 3, "BACK", .8 + 5.7,0., -.6 - 4.4625, 0, "ONLY");
817 gMC->Gspos("BKHS", 4, "BACK", -.8 - 5.7,0., -.6 - 4.4625, 0, "ONLY");
818 gMC->Gspos("BKHS", 5, "BACK", .8 + 5.7,0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
819 gMC->Gspos("BKHS", 6, "BACK", -.8 - 5.7,0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
820 gMC->Gspos("BKHS", 7, "BACK", .8 + 5.7,0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
821 gMC->Gspos("BKHS", 8, "BACK", -.8 - 5.7,0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
822 gMC->Gspos("BKHL", 1, "BACK", .8 + 11.4 + 1.6 + 9.05, 0., .6 + 4.4625, 0, "ONLY");
823 gMC->Gspos("BKHL", 2, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., .6 + 4.4625, 0, "ONLY");
824 gMC->Gspos("BKHL", 3, "BACK", .8 + 11.4 + 1.6 + 9.05, 0., -.6 - 4.4625, 0, "ONLY");
825 gMC->Gspos("BKHL", 4, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., -.6 - 4.4625, 0, "ONLY");
826 gMC->Gspos("BKHL", 5, "BACK", .8 + 11.4+ 1.6 + 9.05, 0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
827 gMC->Gspos("BKHL", 6, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., .6 + 8.925 + 1.2 + 4.4625, 0, "ONLY");
828 gMC->Gspos("BKHL", 7, "BACK", .8 + 11.4 + 1.6 + 9.05, 0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
829 gMC->Gspos("BKHL", 8, "BACK", -.8 - 11.4 - 1.6 - 9.05, 0., -.6 - 8.925 - 1.2 - 4.4625, 0, "ONLY");
830 //Place material inside RICH
831 gMC->Gspos("SRIC", 1, "RICH", 0.,0., 0., 0, "ONLY");
832 gMC->Gspos("AIR2", 1, "RICH", 66.3 + 1.2505, 1.276-Param()->GapThickness()/2-Param()->QuartzThickness()-Param()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, 0., 0, "ONLY");
833 gMC->Gspos("AIR2", 2, "RICH", -66.3 - 1.2505,1.276-Param()->GapThickness()/2-Param()->QuartzThickness()-Param()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, 0., 0, "ONLY");
834 gMC->Gspos("AIR3", 1, "RICH", 0., 1.276-Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, -68.35 - 1.25, 0, "ONLY");
835 gMC->Gspos("AIR3", 2, "RICH", 0., 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .6 - .05 - .376 -.5 - 3.35, 68.35 + 1.25, 0, "ONLY");
836 gMC->Gspos("ALUM", 1, "SRIC", 0., 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .6 - .05 - .376 -.025, 0., 0, "ONLY");
837 gMC->Gspos("HONE", 1, "SRIC", 0., 1.276- Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .6 - .05 - .188, 0., 0, "ONLY");
838 gMC->Gspos("ALUM", 2, "SRIC", 0., 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .6 - .025, 0., 0, "ONLY");
839 gMC->Gspos("FOOT", 1, "SRIC", 64.95, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, 36.9, 0, "ONLY");
840 gMC->Gspos("FOOT", 2, "SRIC", 21.65, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3 , 36.9, 0, "ONLY");
841 gMC->Gspos("FOOT", 3, "SRIC", -21.65, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, 36.9, 0, "ONLY");
842 gMC->Gspos("FOOT", 4, "SRIC", -64.95, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, 36.9, 0, "ONLY");
843 gMC->Gspos("FOOT", 5, "SRIC", 64.95, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
844 gMC->Gspos("FOOT", 6, "SRIC", 21.65, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
845 gMC->Gspos("FOOT", 7, "SRIC", -21.65, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
846 gMC->Gspos("FOOT", 8, "SRIC", -64.95, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .4 - .3, -36.9, 0, "ONLY");
847 gMC->Gspos("OQUA", 1, "SRIC", 0., 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()- .2, 0., 0, "ONLY");
849 gMC->Gspos("SMLG", 1, "SRIC", pcX/2 + (66.3 - pcX/2)/2, 1.276 + .25, 0., 0, "ONLY");
850 gMC->Gspos("SMLG", 2, "SRIC", - pcX/2 - (66.3 - pcX/2)/2, 1.276 + .25, 0., 0, "ONLY");
851 gMC->Gspos("SMSH", 1, "SRIC", 0., 1.276 + .25, pcY/2 + (68.35 - pcY/2)/2, 0, "ONLY");
852 gMC->Gspos("SMSH", 2, "SRIC", 0., 1.276 + .25, - pcY/2 - (68.35 - pcY/2)/2, 0, "ONLY");
854 Float_t supp_y = 1.276 - Param()->GapThickness()/2- Param()->QuartzThickness() -Param()->FreonThickness() - .2 + .3; //y position of freon supports
855 gMC->Gspos("SFLG", 1, "SRIC", Param()->QuartzWidth()/2 + (66.3 - Param()->QuartzWidth()/2)/2, supp_y, 0., 0, "ONLY");
856 gMC->Gspos("SFLG", 2, "SRIC", - Param()->QuartzWidth()/2 - (66.3 - Param()->QuartzWidth()/2)/2, supp_y, 0., 0, "ONLY");
857 gMC->Gspos("SFSH", 1, "SRIC", 0., supp_y, Param()->QuartzLength()/2 + (68.35 - Param()->QuartzLength()/2)/2, 0, "ONLY");
858 gMC->Gspos("SFSH", 2, "SRIC", 0., supp_y, - Param()->QuartzLength()/2 - (68.35 - Param()->QuartzLength()/2)/2, 0, "ONLY");
859 AliMatrix(idrotm[1019], 0., 0., 90., 0., 90., 90.);
862 for (i = 0; i < nspacers/3; i++) {
863 zs = -11.6/2 + (TMath::Abs(nspacers/6) - i) * 12.2;
864 gMC->Gspos("SPAC", i, "FRE1", 10.5, 0., zs, idrotm[1019], "ONLY"); //Original settings
866 for (i = nspacers/3; i < (nspacers*2)/3; i++) {
867 zs = -11.6/2 + (nspacers/3 + TMath::Abs(nspacers/6) - i) * 12.2;
868 gMC->Gspos("SPAC", i, "FRE1", 0, 0., zs, idrotm[1019], "ONLY"); //Original settings
870 for (i = (nspacers*2)/3; i < nspacers; ++i) {
871 zs = -11.6/2 + ((nspacers*2)/3 + TMath::Abs(nspacers/6) - i) * 12.2;
872 gMC->Gspos("SPAC", i, "FRE1", -10.5, 0., zs, idrotm[1019], "ONLY"); //Original settings
874 for (i = 0; i < nspacers/3; i++) {
875 zs = -11.6/2 + (TMath::Abs(nspacers/6) - i) * 12.2;
876 gMC->Gspos("SPAC", i, "FRE2", 10.5, 0., zs, idrotm[1019], "ONLY"); //Original settings
878 for (i = nspacers/3; i < (nspacers*2)/3; i++) {
879 zs = -11.6/2 + (nspacers/3 + TMath::Abs(nspacers/6) - i) * 12.2;
880 gMC->Gspos("SPAC", i, "FRE2", 0, 0., zs, idrotm[1019], "ONLY"); //Original settings
882 for (i = (nspacers*2)/3; i < nspacers; ++i) {
883 zs = -11.6/2 + ((nspacers*2)/3 + TMath::Abs(nspacers/6) - i) * 12.2;
884 gMC->Gspos("SPAC", i, "FRE2", -10.5, 0., zs, idrotm[1019], "ONLY"); //Original settings
886 gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
887 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
888 gMC->Gspos("OQF1", 1, "SRIC", Param()->OuterFreonWidth()/2 + Param()->InnerFreonWidth()/2 + 2, 1.276 - Param()->GapThickness()/2- Param()->QuartzThickness() -Param()->FreonThickness()/2, 0., 0, "ONLY"); //Original settings (31.3)
889 gMC->Gspos("OQF2", 2, "SRIC", 0., 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()/2, 0., 0, "ONLY"); //Original settings
890 gMC->Gspos("OQF1", 3, "SRIC", - (Param()->OuterFreonWidth()/2 + Param()->InnerFreonWidth()/2) - 2, 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness() - Param()->FreonThickness()/2, 0., 0, "ONLY"); //Original settings (-31.3)
891 gMC->Gspos("QUAR", 1, "SRIC", 0., 1.276 - Param()->GapThickness()/2 - Param()->QuartzThickness()/2, 0., 0, "ONLY");
892 gMC->Gspos("GAP ", 1, "META", 0., Param()->GapThickness()/2 - Param()->ProximityGapThickness()/2 - 0.0001, 0., 0, "ONLY");
893 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
894 gMC->Gspos("CSI ", 1, "SRIC", 0., 1.276 + Param()->GapThickness()/2 + .25, 0., 0, "ONLY");
895 //Wire support placing
896 gMC->Gspos("WSG2", 1, "GAP ", 0., Param()->ProximityGapThickness()/2 - .1, 0., 0, "ONLY");
897 gMC->Gspos("WSG1", 1, "CSI ", 0., 0., 0., 0, "ONLY");
898 gMC->Gspos("WSMe", 1, "SRIC ", 0., 1.276 + Param()->GapThickness()/2 + .5 + 1.05, 0., 0, "ONLY");
900 gMC->Gspos("BACK", 1, "SRIC ", -33.15, 1.276 + Param()->GapThickness()/2 + .5 + 2.1 + 2, 43.3, 0, "ONLY");
901 gMC->Gspos("BACK", 2, "SRIC ", 33.15, 1.276 + Param()->GapThickness()/2 + .5 + 2.1 + 2 , 43.3, 0, "ONLY");
902 gMC->Gspos("BACK", 3, "SRIC ", -33.15, 1.276 + Param()->GapThickness()/2 + .5 + 2.1 + 2, 0., 0, "ONLY");
903 gMC->Gspos("BACK", 4, "SRIC ", 33.15, 1.276 + Param()->GapThickness()/2 + .5 + 2.1 + 2, 0., 0, "ONLY");
904 gMC->Gspos("BACK", 5, "SRIC ", 33.15, 1.276 + Param()->GapThickness()/2 + .5 + 2.1 + 2, -43.3, 0, "ONLY");
905 gMC->Gspos("BACK", 6, "SRIC ", -33.15, 1.276 + Param()->GapThickness()/2 + .5 + 2.1 + 2, -43.3, 0, "ONLY");
907 gMC->Gspos("PCB ", 1, "SRIC ", 0., 1.276 + Param()->GapThickness()/2 + .5 + 1.05, pcX/4 + .5025 + 2.5, 0, "ONLY");
908 gMC->Gspos("PCB ", 2, "SRIC ", 0., 1.276 + Param()->GapThickness()/2 + .5 + 1.05, -pcX/4 - .5025 - 2.5, 0, "ONLY");
910 //place chambers into mother volume ALIC
912 for(int i=1;i<=kNCH;i++){
913 AliMatrix(idrotm[1000+i],C(i)->ThetaXd(),C(i)->PhiXd(),
914 C(i)->ThetaYd(),C(i)->PhiYd(),
915 C(i)->ThetaZd(),C(i)->PhiZd());
916 gMC->Gspos("RICH",i,"ALIC",C(i)->X(),C(i)->Y(),C(i)->Z(),idrotm[1000+i], "ONLY");
919 if(GetDebug())Info("CreateGeometry","Stop.");
920 }//void AliRICH::CreateGeometry()
921 //__________________________________________________________________________________________________
922 void AliRICH::CreateChambers()
923 {//create all RICH Chambers on each call. Previous chambers deleted
924 if(fChambers) delete fChambers;
925 if(GetDebug())Info("CreateChambers","Creating RICH chambers.");
926 fChambers=new TObjArray(kNCH);
927 fChambers->SetOwner();
928 for(int i=0;i<kNCH;i++) fChambers->AddAt(new AliRICHChamber(i+1,Param()),i);
929 }//void AliRICH::CreateChambers()
930 //__________________________________________________________________________________________________
931 void AliRICH::GenerateFeedbacks(Int_t iChamber,Float_t eloss)
932 {// Generate FeedBack photons
934 Float_t cthf, phif, enfp = 0, sthf;
935 Float_t e1[3], e2[3], e3[3];
938 Float_t pol[3], mom[4];
939 //Determine number of feedback photons
941 gMC->TrackPosition(x4);
942 Float_t charge=Param()->TotalCharge(gMC->TrackPid(),eloss,C(iChamber)->G2Ly(x4));//Total Charge
943 Int_t iNphotons=gMC->GetRandom()->Poisson(Param()->AlphaFeedback()*charge);
944 Info("GenerateFeedbacks","N photons=%i",iNphotons);
946 for(Int_t i=0;i<iNphotons;i++){
948 gMC->GetRandom()->RndmArray(2,ranf); //Sample direction
951 sthf = TMath::Sqrt((1 - cthf) * (1 + cthf));
952 phif = ranf[1] * 2 * TMath::Pi();
954 if(Double_t randomNumber=gMC->GetRandom()->Rndm()<=0.57)
956 else if(randomNumber<=0.7)
962 dir[0] = sthf * TMath::Sin(phif); dir[1] = cthf; dir[2] = sthf * TMath::Cos(phif);
963 gMC->Gdtom(dir, mom, 2);
964 mom[0]*=enfp; mom[1]*=enfp; mom[2]*=enfp;
965 mom[3] = TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2]);
968 e1[0]= 0; e1[1]=-dir[2]; e1[2]= dir[1];
969 e2[0]=-dir[1]; e2[1]= dir[0]; e2[2]= 0;
970 e3[0]= dir[1]; e3[1]= 0; e3[2]=-dir[0];
973 for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
974 if (!vmod) for(j=0;j<3;j++) {
980 for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
981 if (!vmod) for(j=0;j<3;j++) {
988 for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
989 vmod=TMath::Sqrt(1/vmod);
990 for(j=0;j<3;j++) e1[j]*=vmod;
993 for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
994 vmod=TMath::Sqrt(1/vmod);
995 for(j=0;j<3;j++) e2[j]*=vmod;
997 phi = gMC->GetRandom()->Rndm()* 2 * TMath::Pi();
998 for(j=0;j<3;j++) pol[j]=e1[j]*TMath::Sin(phi)+e2[j]*TMath::Cos(phi);
999 gMC->Gdtom(pol, pol, 2);
1000 Int_t outputNtracksStored;
1001 gAlice->PushTrack(1, //do not transport
1002 gAlice->GetCurrentTrackNumber(),//parent track
1004 mom[0],mom[1],mom[2],mom[3], //track momentum
1005 x4.X(),x4.Y(),x4.Z(),x4.T(), //track origin
1006 pol[0],pol[1],pol[2], //polarization
1007 kPFeedBackPhoton,outputNtracksStored,1.0);
1010 }//Int_t AliRICH::FeedBackPhotons()
1011 //__________________________________________________________________________________________________