1 ///////////////////////////////////////////////////////////////////////////////
4 // This class contains the basic functions for the Time Of Flight //
5 // detector. Functions specific to one particular geometry are //
6 // contained in the derived classes //
10 <img src="gif/AliTOFClass.gif">
15 ///////////////////////////////////////////////////////////////////////////////
27 //_____________________________________________________________________________
31 // Default constructor
36 //_____________________________________________________________________________
37 AliTOF::AliTOF(const char *name, const char *title)
38 : AliDetector(name,title)
41 // AliTOF standard constructor
43 fHits = new TClonesArray("AliTOFhit", 405);
52 //_____________________________________________________________________________
53 void AliTOF::AddHit(Int_t track, Int_t *vol, Float_t *hits)
58 TClonesArray &lhits = *fHits;
59 new(lhits[fNhits++]) AliTOFhit(fIshunt,track,vol,hits);
62 //_____________________________________________________________________________
63 void AliTOF::BuildGeometry()
66 // Build TOF ROOT geometry for the ALICE event viewver
69 const int kColorTOF = 27;
72 Top=gAlice->GetGeometry()->GetNode("alice");
74 // Define rotation matrixes
75 new TRotMatrix("rot501","rot501",90,-18.94737,90,71.05263,0,0);
76 new TRotMatrix("rot502","rot502",90,-37.89474,90,52.10526,0,0);
77 new TRotMatrix("rot503","rot503",90,-56.84211,90,33.15789,0,0);
78 new TRotMatrix("rot504","rot504",90,-75.78947,90,14.21053,0,0);
79 new TRotMatrix("rot505","rot505",90,-94.73685,90,-4.736847,0,0);
80 new TRotMatrix("rot506","rot506",90,-113.6842,90,-23.68421,0,0);
81 new TRotMatrix("rot507","rot507",90,-132.6316,90,-42.63158,0,0);
82 new TRotMatrix("rot508","rot508",90,-151.5789,90,-61.57895,0,0);
83 new TRotMatrix("rot509","rot509",90,-170.5263,90,-80.52632,0,0);
84 new TRotMatrix("rot510","rot510",90,-189.4737,90,-99.47369,0,0);
85 new TRotMatrix("rot511","rot511",90,-208.4211,90,-118.4211,0,0);
86 new TRotMatrix("rot512","rot512",90,-227.3684,90,-137.3684,0,0);
87 new TRotMatrix("rot513","rot513",90,-246.3158,90,-156.3158,0,0);
88 new TRotMatrix("rot514","rot514",90,-265.2632,90,-175.2632,0,0);
89 new TRotMatrix("rot515","rot515",90,-284.2105,90,-194.2105,0,0);
90 new TRotMatrix("rot516","rot516",90,-303.1579,90,-213.1579,0,0);
91 new TRotMatrix("rot517","rot517",90,-322.1053,90,-232.1053,0,0);
92 new TRotMatrix("rot518","rot518",90,-341.0526,90,-251.0526,0,0);
93 new TRotMatrix("rot519","rot519",90,-360,90,-270,0,0);
95 // Define TOF basic volume
96 new TBRIK("S_TOF1","TOF box","void",60.,6.,175.);
98 // Position the different copies
100 Node = new TNode("FTO11","FTO11","S_TOF1",224.8018,288.8254,175,"rot502");
101 Node->SetLineColor(kColorTOF);
105 Node = new TNode("FTO12","FTO12","S_TOF1",306.4029,200.183,175,"rot503");
106 Node->SetLineColor(kColorTOF);
110 Node = new TNode("FTO13","FTO13","S_TOF1",354.8005,89.84769,175,"rot504");
111 Node->SetLineColor(kColorTOF);
115 Node = new TNode("FTO14","FTO14","S_TOF1",364.7499,-30.22407,175,"rot505");
116 Node->SetLineColor(kColorTOF);
120 Node = new TNode("FTO15","FTO15","S_TOF1",335.173,-147.0205,175,"rot506");
121 Node->SetLineColor(kColorTOF);
125 Node = new TNode("FTO16","FTO16","S_TOF1",-335.1731,-147.0205,175,"rot513");
126 Node->SetLineColor(kColorTOF);
130 Node = new TNode("FTO17","FTO17","S_TOF1",-364.7499,-30.22407,175,"rot514");
131 Node->SetLineColor(kColorTOF);
135 Node = new TNode("FTO18","FTO18","S_TOF1",-354.8005,89.84778,175,"rot515");
136 Node->SetLineColor(kColorTOF);
140 Node = new TNode("FTO19","FTO19","S_TOF1",-306.4029,200.183,175,"rot516");
141 Node->SetLineColor(kColorTOF);
145 Node = new TNode("FTO110","FTO110","S_TOF1",-224.8019,288.8254,175,"rot517");
146 Node->SetLineColor(kColorTOF);
150 Node = new TNode("FTO111","FTO111","S_TOF1",224.8018,288.8254,-175,"rot502");
151 Node->SetLineColor(kColorTOF);
155 Node = new TNode("FTO112","FTO112","S_TOF1",306.4029,200.183,-175,"rot503");
156 Node->SetLineColor(kColorTOF);
160 Node = new TNode("FTO113","FTO113","S_TOF1",354.8005,89.84769,-175,"rot504");
161 Node->SetLineColor(kColorTOF);
165 Node = new TNode("FTO114","FTO114","S_TOF1",364.7499,-30.22407,-175,"rot505");
166 Node->SetLineColor(kColorTOF);
170 Node = new TNode("FTO115","FTO115","S_TOF1",335.173,-147.0205,-175,"rot506");
171 Node->SetLineColor(kColorTOF);
175 Node = new TNode("FTO116","FTO116","S_TOF1",-335.1731,-147.0205,-175,"rot513");
176 Node->SetLineColor(kColorTOF);
180 Node = new TNode("FTO117","FTO117","S_TOF1",-364.7499,-30.22407,-175,"rot514");
181 Node->SetLineColor(kColorTOF);
185 Node = new TNode("FTO118","FTO118","S_TOF1",-354.8005,89.84778,-175,"rot515");
186 Node->SetLineColor(kColorTOF);
190 Node = new TNode("FTO119","FTO119","S_TOF1",-306.4029,200.183,-175,"rot516");
191 Node->SetLineColor(kColorTOF);
195 Node = new TNode("FTO120","FTO120","S_TOF1",-224.8019,288.8254,-175,"rot517");
196 Node->SetLineColor(kColorTOF);
199 // Define second TOF volume
200 new TBRIK("S_TOF2","TOF box","void",60.,6.,100.);
202 // Position the volume
204 Node = new TNode("FTO21","FTO21","S_TOF2",269.275,-247.885,250,"rot507");
205 Node->SetLineColor(kColorTOF);
209 Node = new TNode("FTO22","FTO22","S_TOF2",174.1967,-321.8874,250,"rot508");
210 Node->SetLineColor(kColorTOF);
214 Node = new TNode("FTO23","FTO23","S_TOF2",60.24158,-361.0082,250,"rot509");
215 Node->SetLineColor(kColorTOF);
219 Node = new TNode("FTO24","FTO24","S_TOF2",-60.24168,-361.0082,250,"rot510");
220 Node->SetLineColor(kColorTOF);
224 Node = new TNode("FTO25","FTO25","S_TOF2",-174.1967,-321.8874,250,"rot511");
225 Node->SetLineColor(kColorTOF);
229 Node = new TNode("FTO26","FTO26","S_TOF2",-269.275,-247.885,250,"rot512");
230 Node->SetLineColor(kColorTOF);
234 Node = new TNode("FTO27","FTO27","S_TOF2",269.275,-247.885,-250,"rot507");
235 Node->SetLineColor(kColorTOF);
239 Node = new TNode("FTO28","FTO28","S_TOF2",174.1967,-321.8874,-250,"rot508");
240 Node->SetLineColor(kColorTOF);
244 Node = new TNode("FTO29","FTO29","S_TOF2",60.24158,-361.0082,-250,"rot509");
245 Node->SetLineColor(kColorTOF);
249 Node = new TNode("FTO210","FTO210","S_TOF2",-60.24168,-361.0082,-250,"rot510");
250 Node->SetLineColor(kColorTOF);
254 Node = new TNode("FTO211","FTO211","S_TOF2",-174.1967,-321.8874,-250,"rot511");
255 Node->SetLineColor(kColorTOF);
259 Node = new TNode("FTO212","FTO212","S_TOF2",-269.275,-247.885,-250,"rot512");
260 Node->SetLineColor(kColorTOF);
263 // Define third TOF volume
264 new TBRIK("S_TOF3","TOF box","void",60.,6.,75.);
268 Node = new TNode("FTO31","FTO31","S_TOF3",118.84,346.1691,275,"rot501");
269 Node->SetLineColor(kColorTOF);
273 Node = new TNode("FTO32","FTO32","S_TOF3",-118.8399,346.1691,275,"rot518");
274 Node->SetLineColor(kColorTOF);
278 Node = new TNode("FTO33","FTO33","S_TOF3",0.,366.,275.,"rot519");
279 Node->SetLineColor(kColorTOF);
283 Node = new TNode("FTO34","FTO34","S_TOF3",118.84,346.1691,-275.,"rot501");
284 Node->SetLineColor(kColorTOF);
288 Node = new TNode("FTO35","FTO35","S_TOF3",-118.8399,346.1691,-275,"rot518");
289 Node->SetLineColor(kColorTOF);
293 Node = new TNode("FTO36","FTO36","S_TOF3",0.,366.,-275.,"rot519");
294 Node->SetLineColor(kColorTOF);
298 //_____________________________________________________________________________
299 void AliTOF::CreateGeometry()
302 // Common geometry code for version 2 and version 3 of the TOF
306 <img src="gif/AliTOFv23.gif">
311 AliMC* pMC = AliMC::GetMC();
313 const Double_t kPi=TMath::Pi();
314 const Double_t kDegrad=kPi/180;
315 const Double_t kRaddeg=180/kPi;
319 Float_t xtof, ytof, fil_step, phos_phi, phos_min, phos_max;
321 Float_t zcor1, zcor2, zcor3;
322 Float_t ztof0, ztof1, ztof2, xcor2, ycor2;
324 Float_t dx, dz, zl, xm, ym, phos_r;
327 Float_t rp2, zm0, zm1, zm2;
328 Float_t par[10], fil_min, fil_max;
331 Int_t *idtmed = gAlice->Idtmed();
343 // frame thick along Z axis
346 // frame thick along X axis
349 // barrel length along Z axis
354 phos_phi = TMath::ATan(phos_x / (phos_r * 2.));
355 phos_min = (kPi - phos_phi * 4.) * kRaddeg;
356 phos_max = (phos_phi * 4. + kPi) * kRaddeg;
358 // barrel radius in module contact point
362 pMC->Gsvolu("FBAR", "TUBE", idtmed[500], par, 3);
364 // --- Set module unseen ---
365 pMC->Gspos("FBAR", 1, "ALIC", 0., 0., 0., 0, "ONLY");
366 pMC->Gsatt("FBAR", "SEEN", 0);
368 // Number of TOF-block
375 pMC->Gsvolu("FTO1", "BOX ", idtmed[506], par, 3);
376 pMC->Gsatt("FTO1", "SEEN", -2);
378 pMC->Gsvolu("FTO2", "BOX ", idtmed[506], par, 3);
379 pMC->Gsatt("FTO2", "SEEN", -2);
381 pMC->Gsvolu("FTO3", "BOX ", idtmed[506], par, 3);
382 pMC->Gsatt("FTO3", "SEEN", -2);
384 // Subtraction of TOF module boundaries
387 zm0 = ztof0 - dz * 2.;
388 zm1 = ztof1 - dz * 2.;
389 zm2 = ztof2 - dz * 2.;
391 // TOF module internal definitions
393 TOFpc(xm, ym, zm0, zm1, zm2);
397 fil_step = 360. / lmax;
398 fil_min = phos_min - fil_step * .5;
399 fil_max = phos_max + fil_step * .5;
401 zcor2 = ztof0 - ztof1 / 2.;
402 zcor3 = ztof0 - ztof2 / 2.;
403 for (i = 1; i <= lmax; ++i) {
405 //xcor1 = rp1 * TMath::Sin(fil1 * kDegrad) + dx * TMath::Cos(fil1 * kDegrad);
406 //ycor1 = rp1 * TMath::Cos(fil1 * kDegrad) - dx * TMath::Sin(fil1 * kDegrad);
407 xcor2 = rp2 * TMath::Sin(fil1 * kDegrad);
408 ycor2 = rp2 * TMath::Cos(fil1 * kDegrad);
410 AliMatrix(idrotm[i], 90., -fil1, 90., 90. - fil1, 0., 0.);
411 if (fil1 >= fil_min && fil1 <= fil_max) {
412 pMC->Gspos("FTO2", i, "FBAR", xcor2, ycor2, zcor2, idrotm[i], "ONLY");
413 pMC->Gspos("FTO2", lmax1, "FBAR", xcor2, ycor2, -zcor2, idrotm[i], "ONLY");
414 } else if (fil1 <= fil_rich || fil1 >= 360. - fil_rich) {
416 pMC->Gspos("FTO3", i, "FBAR", xcor2, ycor2, zcor3, idrotm[i], "ONLY");
417 pMC->Gspos("FTO3", lmax1, "FBAR", xcor2, ycor2, -zcor3, idrotm[i], "ONLY");
420 pMC->Gspos("FTO1", i, "FBAR", xcor2, ycor2, zcor1, idrotm[i], "ONLY");
421 pMC->Gspos("FTO1", lmax1, "FBAR", xcor2, ycor2, -zcor1, idrotm[i], "ONLY");
426 //_____________________________________________________________________________
427 void AliTOF::DrawModule()
430 // Draw a shaded view of the common part of the TOF geometry
431 // for versions 2 and 3
434 AliMC* pMC = AliMC::GetMC();
436 // Set everything unseen
437 pMC->Gsatt("*", "seen", -1);
439 // Set ALIC mother transparent
440 pMC->Gsatt("ALIC","SEEN",0);
442 // Set the volumes visible
443 pMC->Gsatt("FBAR","SEEN",0);
444 pMC->Gsatt("FTO1","SEEN",1);
445 pMC->Gsatt("FTO2","SEEN",1);
446 pMC->Gsatt("FTO3","SEEN",1);
448 pMC->Gdopt("hide", "on");
449 pMC->Gdopt("shad", "on");
450 pMC->Gsatt("*", "fill", 7);
451 pMC->SetClipBox(".");
452 pMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
454 pMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
455 pMC->Gdhead(1111, "Time Of Flight");
456 pMC->Gdman(18, 4, "MAN");
457 pMC->Gdopt("hide","off");
460 //_____________________________________________________________________________
461 void AliTOF::CreateMaterials()
464 // Defines TOF materials for all versions
465 // Authors : Maxim Martemianov, Boris Zagreev (ITEP) 18/09/98
467 Int_t ISXFLD = gAlice->Field()->Integ();
468 Float_t SXMGMX = gAlice->Field()->Max();
470 Float_t ac[2] = { 12.,16. };
471 Float_t zc[2] = { 6.,8. };
472 Float_t wc[2] = { 1.,2. };
473 Float_t ag10[4] = { 12.,1.,16.,28. };
474 Float_t zg10[4] = { 6.,1.,8.,14. };
475 Float_t wmatg10[4] = { .259,.288,.248,.205 };
476 Float_t adme[5] = { 12.,1.,16.,19.,79. };
477 Float_t zdme[5] = { 6.,1.,8.,9.,35. };
478 Float_t wmatdme[5] = { .4056,.0961,.2562,.1014,.1407 };
479 Float_t aal[2] = { 27.,16. };
480 Float_t zal[2] = { 13.,8. };
481 Float_t wmatal[2] = { 2.,3. };
484 Float_t epsil, stmin, dc, densg10, densal, deemax, stemax;
486 Int_t nlmatg10, nlmatal;
489 AliMaterial(0, "Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
491 AliMaterial(1, "Air$",14.61,7.3,0.001205,30423.24,67500.);
494 AliMixture(7, "CO2$", ac, zc, dc, -2, wc);
498 AliMixture(5, "G10$", ag10, zg10, densg10, nlmatg10, wmatg10);
502 AliMixture(6, "DME ", adme, zdme, densdme, nlmatdme, wmatdme);
503 // ---- ALUMINA (AL203)
506 AliMixture(8, "ALUMINA$", aal, zal, densal, nlmatal, wmatal);
508 // EPSIL = 0.1 ! Tracking precision,
509 // STEMAX = 0.1 ! Maximum displacement for multiple scattering
510 // DEEMAX = 0.1 ! Maximum fractional energy loss, DLS
517 AliMedium(500, "Vacuum $", 0, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
518 AliMedium(501, "Air $", 0, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
519 AliMedium(505, "G10$", 5, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
520 AliMedium(506, "DME$", 6, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
521 AliMedium(507, "CO2$", 7, 0, ISXFLD, SXMGMX, 10., -.01, -.1, .01, -.01);
522 AliMedium(508, "ALUMINA$", 8, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
523 AliMedium(510, "DME$", 6, 1, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
526 //_____________________________________________________________________________
527 Int_t AliTOF::DistancetoPrimitive(Int_t , Int_t )
530 // Returns distance from mouse pointer to detector, default version
535 //_____________________________________________________________________________
539 // Initialise TOF detector after it has been built
542 AliMC *pMC=AliMC::GetMC();
545 for(i=0;i<35;i++) printf("*");
546 printf(" TOF_INIT ");
547 for(i=0;i<35;i++) printf("*");
550 // Set id of TOF sensitive volume
551 fIdSens=pMC->VolId("FPG2");
553 for(i=0;i<80;i++) printf("*");
560 //___________________________________________
561 AliTOFhit::AliTOFhit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
568 for (i=0;i<3;i++) fVolume[i] = vol[i];