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 ///////////////////////////////////////////////////////////////////////////////
26 //_____________________________________________________________________________
30 // Default constructor
35 //_____________________________________________________________________________
36 AliTOF::AliTOF(const char *name, const char *title)
37 : AliDetector(name,title)
40 // AliTOF standard constructor
42 fHits = new TClonesArray("AliTOFhit", 405);
51 //_____________________________________________________________________________
52 void AliTOF::AddHit(Int_t track, Int_t *vol, Float_t *hits)
57 TClonesArray &lhits = *fHits;
58 new(lhits[fNhits++]) AliTOFhit(fIshunt,track,vol,hits);
61 //_____________________________________________________________________________
62 void AliTOF::BuildGeometry()
65 // Build TOF ROOT geometry for the ALICE event viewver
68 const int kColorTOF = 27;
71 Top=gAlice->GetGeometry()->GetNode("alice");
73 // Define rotation matrixes
74 new TRotMatrix("rot501","rot501",90,-18.94737,90,71.05263,0,0);
75 new TRotMatrix("rot502","rot502",90,-37.89474,90,52.10526,0,0);
76 new TRotMatrix("rot503","rot503",90,-56.84211,90,33.15789,0,0);
77 new TRotMatrix("rot504","rot504",90,-75.78947,90,14.21053,0,0);
78 new TRotMatrix("rot505","rot505",90,-94.73685,90,-4.736847,0,0);
79 new TRotMatrix("rot506","rot506",90,-113.6842,90,-23.68421,0,0);
80 new TRotMatrix("rot507","rot507",90,-132.6316,90,-42.63158,0,0);
81 new TRotMatrix("rot508","rot508",90,-151.5789,90,-61.57895,0,0);
82 new TRotMatrix("rot509","rot509",90,-170.5263,90,-80.52632,0,0);
83 new TRotMatrix("rot510","rot510",90,-189.4737,90,-99.47369,0,0);
84 new TRotMatrix("rot511","rot511",90,-208.4211,90,-118.4211,0,0);
85 new TRotMatrix("rot512","rot512",90,-227.3684,90,-137.3684,0,0);
86 new TRotMatrix("rot513","rot513",90,-246.3158,90,-156.3158,0,0);
87 new TRotMatrix("rot514","rot514",90,-265.2632,90,-175.2632,0,0);
88 new TRotMatrix("rot515","rot515",90,-284.2105,90,-194.2105,0,0);
89 new TRotMatrix("rot516","rot516",90,-303.1579,90,-213.1579,0,0);
90 new TRotMatrix("rot517","rot517",90,-322.1053,90,-232.1053,0,0);
91 new TRotMatrix("rot518","rot518",90,-341.0526,90,-251.0526,0,0);
92 new TRotMatrix("rot519","rot519",90,-360,90,-270,0,0);
94 // Position the different copies
95 // const Float_t rtof=366;
96 // changed by Federico Carminati. TOF people should really look at this
97 const Float_t rtof=381;
99 const Float_t angle=2*kPI/ntof;
101 const Float_t xtof = rtof*TMath::Sin(kPI/ntof);
103 // Define TOF basic volume
104 new TBRIK("S_TOF1","TOF box","void",xtof,6.,175.);
108 Node = new TNode("FTO11","FTO11","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot502");
109 Node->SetLineColor(kColorTOF);
113 Node = new TNode("FTO111","FTO111","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot502");
114 Node->SetLineColor(kColorTOF);
120 Node = new TNode("FTO12","FTO12","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot503");
121 Node->SetLineColor(kColorTOF);
125 Node = new TNode("FTO112","FTO112","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot503");
126 Node->SetLineColor(kColorTOF);
132 Node = new TNode("FTO13","FTO13","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot504");
133 Node->SetLineColor(kColorTOF);
137 Node = new TNode("FTO113","FTO113","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot504");
138 Node->SetLineColor(kColorTOF);
144 Node = new TNode("FTO14","FTO14","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot505");
145 Node->SetLineColor(kColorTOF);
149 Node = new TNode("FTO114","FTO114","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot505");
150 Node->SetLineColor(kColorTOF);
156 Node = new TNode("FTO15","FTO15","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot506");
157 Node->SetLineColor(kColorTOF);
161 Node = new TNode("FTO115","FTO115","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot506");
162 Node->SetLineColor(kColorTOF);
168 Node = new TNode("FTO16","FTO16","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot513");
169 Node->SetLineColor(kColorTOF);
173 Node = new TNode("FTO116","FTO116","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot513");
174 Node->SetLineColor(kColorTOF);
180 Node = new TNode("FTO17","FTO17","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot514");
181 Node->SetLineColor(kColorTOF);
185 Node = new TNode("FTO117","FTO117","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot514");
186 Node->SetLineColor(kColorTOF);
192 Node = new TNode("FTO18","FTO18","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot515");
193 Node->SetLineColor(kColorTOF);
197 Node = new TNode("FTO118","FTO118","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot515");
198 Node->SetLineColor(kColorTOF);
204 Node = new TNode("FTO19","FTO19","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot516");
205 Node->SetLineColor(kColorTOF);
209 Node = new TNode("FTO119","FTO119","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot516");
210 Node->SetLineColor(kColorTOF);
216 Node = new TNode("FTO110","FTO110","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),175,"rot517");
217 Node->SetLineColor(kColorTOF);
221 Node = new TNode("FTO120","FTO120","S_TOF1",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-175,"rot517");
222 Node->SetLineColor(kColorTOF);
225 // Define second TOF volume
226 new TBRIK("S_TOF2","TOF box","void",xtof,6.,100.);
228 // Position the volume
231 Node = new TNode("FTO21","FTO21","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),250,"rot507");
232 Node->SetLineColor(kColorTOF);
236 Node = new TNode("FTO27","FTO27","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-250,"rot507");
237 Node->SetLineColor(kColorTOF);
243 Node = new TNode("FTO22","FTO22","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),250,"rot508");
244 Node->SetLineColor(kColorTOF);
248 Node = new TNode("FTO28","FTO28","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-250,"rot508");
249 Node->SetLineColor(kColorTOF);
255 Node = new TNode("FTO23","FTO23","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),250,"rot509");
256 Node->SetLineColor(kColorTOF);
260 Node = new TNode("FTO29","FTO29","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-250,"rot509");
261 Node->SetLineColor(kColorTOF);
267 Node = new TNode("FTO24","FTO24","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),250,"rot510");
268 Node->SetLineColor(kColorTOF);
272 Node = new TNode("FTO210","FTO210","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-250,"rot510");
273 Node->SetLineColor(kColorTOF);
279 Node = new TNode("FTO25","FTO25","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),250,"rot511");
280 Node->SetLineColor(kColorTOF);
284 Node = new TNode("FTO211","FTO211","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-250,"rot511");
285 Node->SetLineColor(kColorTOF);
291 Node = new TNode("FTO26","FTO26","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),250,"rot512");
292 Node->SetLineColor(kColorTOF);
296 Node = new TNode("FTO212","FTO212","S_TOF2",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-250,"rot512");
297 Node->SetLineColor(kColorTOF);
300 // Define third TOF volume
301 new TBRIK("S_TOF3","TOF box","void",xtof,6.,75.);
306 Node = new TNode("FTO31","FTO31","S_TOF3",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),275,"rot501");
307 Node->SetLineColor(kColorTOF);
311 Node = new TNode("FTO34","FTO34","S_TOF3",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-275.,"rot501");
312 Node->SetLineColor(kColorTOF);
318 Node = new TNode("FTO32","FTO32","S_TOF3",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),275,"rot518");
319 Node->SetLineColor(kColorTOF);
323 Node = new TNode("FTO35","FTO35","S_TOF3",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-275,"rot518");
324 Node->SetLineColor(kColorTOF);
330 Node = new TNode("FTO33","FTO33","S_TOF3",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),275.,"rot519");
331 Node->SetLineColor(kColorTOF);
335 Node = new TNode("FTO36","FTO36","S_TOF3",rtof*TMath::Cos(ang),rtof*TMath::Sin(ang),-275.,"rot519");
336 Node->SetLineColor(kColorTOF);
340 //_____________________________________________________________________________
341 void AliTOF::CreateGeometry()
344 // Common geometry code for version 2 and version 3 of the TOF
348 <img src="gif/AliTOFv23.gif">
353 AliMC* pMC = AliMC::GetMC();
355 const Double_t kPi=TMath::Pi();
356 const Double_t kDegrad=kPi/180;
357 const Double_t kRaddeg=180/kPi;
361 Float_t xtof, ytof, fil_step, phos_phi, phos_min, phos_max;
363 Float_t zcor1, zcor2, zcor3;
364 Float_t ztof0, ztof1, ztof2, xcor2, ycor2;
366 Float_t dx, dz, zl, xm, ym, phos_r;
369 Float_t rp2, zm0, zm1, zm2;
370 Float_t par[10], fil_min, fil_max;
373 Int_t *idtmed = gAlice->Idtmed();
385 // frame thick along Z axis
388 // frame thick along X axis
391 // barrel length along Z axis
396 phos_phi = TMath::ATan(phos_x / (phos_r * 2.));
397 phos_min = (kPi - phos_phi * 4.) * kRaddeg;
398 phos_max = (phos_phi * 4. + kPi) * kRaddeg;
400 // barrel radius in module contact point
404 pMC->Gsvolu("FBAR", "TUBE", idtmed[500], par, 3);
406 // --- Set module unseen ---
407 pMC->Gspos("FBAR", 1, "ALIC", 0., 0., 0., 0, "ONLY");
408 pMC->Gsatt("FBAR", "SEEN", 0);
410 // Number of TOF-block
417 pMC->Gsvolu("FTO1", "BOX ", idtmed[506], par, 3);
418 pMC->Gsatt("FTO1", "SEEN", -2);
420 pMC->Gsvolu("FTO2", "BOX ", idtmed[506], par, 3);
421 pMC->Gsatt("FTO2", "SEEN", -2);
423 pMC->Gsvolu("FTO3", "BOX ", idtmed[506], par, 3);
424 pMC->Gsatt("FTO3", "SEEN", -2);
426 // Subtraction of TOF module boundaries
429 zm0 = ztof0 - dz * 2.;
430 zm1 = ztof1 - dz * 2.;
431 zm2 = ztof2 - dz * 2.;
433 // TOF module internal definitions
435 TOFpc(xm, ym, zm0, zm1, zm2);
439 fil_step = 360. / lmax;
440 fil_min = phos_min - fil_step * .5;
441 fil_max = phos_max + fil_step * .5;
443 zcor2 = ztof0 - ztof1 / 2.;
444 zcor3 = ztof0 - ztof2 / 2.;
445 for (i = 1; i <= lmax; ++i) {
447 //xcor1 = rp1 * TMath::Sin(fil1 * kDegrad) + dx * TMath::Cos(fil1 * kDegrad);
448 //ycor1 = rp1 * TMath::Cos(fil1 * kDegrad) - dx * TMath::Sin(fil1 * kDegrad);
449 xcor2 = rp2 * TMath::Sin(fil1 * kDegrad);
450 ycor2 = rp2 * TMath::Cos(fil1 * kDegrad);
452 AliMatrix(idrotm[i], 90., -fil1, 90., 90. - fil1, 0., 0.);
453 if (fil1 >= fil_min && fil1 <= fil_max) {
454 pMC->Gspos("FTO2", i, "FBAR", xcor2, ycor2, zcor2, idrotm[i], "ONLY");
455 pMC->Gspos("FTO2", lmax1, "FBAR", xcor2, ycor2, -zcor2, idrotm[i], "ONLY");
456 } else if (fil1 <= fil_rich || fil1 >= 360. - fil_rich) {
458 pMC->Gspos("FTO3", i, "FBAR", xcor2, ycor2, zcor3, idrotm[i], "ONLY");
459 pMC->Gspos("FTO3", lmax1, "FBAR", xcor2, ycor2, -zcor3, idrotm[i], "ONLY");
462 pMC->Gspos("FTO1", i, "FBAR", xcor2, ycor2, zcor1, idrotm[i], "ONLY");
463 pMC->Gspos("FTO1", lmax1, "FBAR", xcor2, ycor2, -zcor1, idrotm[i], "ONLY");
468 //_____________________________________________________________________________
469 void AliTOF::DrawModule()
472 // Draw a shaded view of the common part of the TOF geometry
473 // for versions 2 and 3
476 AliMC* pMC = AliMC::GetMC();
478 // Set everything unseen
479 pMC->Gsatt("*", "seen", -1);
481 // Set ALIC mother transparent
482 pMC->Gsatt("ALIC","SEEN",0);
484 // Set the volumes visible
485 pMC->Gsatt("FBAR","SEEN",0);
486 pMC->Gsatt("FTO1","SEEN",1);
487 pMC->Gsatt("FTO2","SEEN",1);
488 pMC->Gsatt("FTO3","SEEN",1);
490 pMC->Gdopt("hide", "on");
491 pMC->Gdopt("shad", "on");
492 pMC->Gsatt("*", "fill", 7);
493 pMC->SetClipBox(".");
494 pMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
496 pMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
497 pMC->Gdhead(1111, "Time Of Flight");
498 pMC->Gdman(18, 4, "MAN");
499 pMC->Gdopt("hide","off");
502 //_____________________________________________________________________________
503 void AliTOF::CreateMaterials()
506 // Defines TOF materials for all versions
507 // Authors : Maxim Martemianov, Boris Zagreev (ITEP) 18/09/98
509 Int_t ISXFLD = gAlice->Field()->Integ();
510 Float_t SXMGMX = gAlice->Field()->Max();
512 Float_t ac[2] = { 12.,16. };
513 Float_t zc[2] = { 6.,8. };
514 Float_t wc[2] = { 1.,2. };
515 Float_t ag10[4] = { 12.,1.,16.,28. };
516 Float_t zg10[4] = { 6.,1.,8.,14. };
517 Float_t wmatg10[4] = { .259,.288,.248,.205 };
518 Float_t adme[5] = { 12.,1.,16.,19.,79. };
519 Float_t zdme[5] = { 6.,1.,8.,9.,35. };
520 Float_t wmatdme[5] = { .4056,.0961,.2562,.1014,.1407 };
521 Float_t aal[2] = { 27.,16. };
522 Float_t zal[2] = { 13.,8. };
523 Float_t wmatal[2] = { 2.,3. };
526 Float_t epsil, stmin, dc, densg10, densal, deemax, stemax;
528 Int_t nlmatg10, nlmatal;
531 AliMaterial(0, "Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
533 AliMaterial(1, "Air$",14.61,7.3,0.001205,30423.24,67500.);
536 AliMixture(7, "CO2$", ac, zc, dc, -2, wc);
540 AliMixture(5, "G10$", ag10, zg10, densg10, nlmatg10, wmatg10);
544 AliMixture(6, "DME ", adme, zdme, densdme, nlmatdme, wmatdme);
545 // ---- ALUMINA (AL203)
548 AliMixture(8, "ALUMINA$", aal, zal, densal, nlmatal, wmatal);
550 // EPSIL = 0.1 ! Tracking precision,
551 // STEMAX = 0.1 ! Maximum displacement for multiple scattering
552 // DEEMAX = 0.1 ! Maximum fractional energy loss, DLS
559 AliMedium(500, "Vacuum $", 0, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
560 AliMedium(501, "Air $", 0, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
561 AliMedium(505, "G10$", 5, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
562 AliMedium(506, "DME$", 6, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
563 AliMedium(507, "CO2$", 7, 0, ISXFLD, SXMGMX, 10., -.01, -.1, .01, -.01);
564 AliMedium(508, "ALUMINA$", 8, 0, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
565 AliMedium(510, "DME$", 6, 1, ISXFLD, SXMGMX, 10., stemax, deemax, epsil, stmin);
568 //_____________________________________________________________________________
569 Int_t AliTOF::DistancetoPrimitive(Int_t , Int_t )
572 // Returns distance from mouse pointer to detector, default version
577 //_____________________________________________________________________________
581 // Initialise TOF detector after it has been built
584 AliMC *pMC=AliMC::GetMC();
587 for(i=0;i<35;i++) printf("*");
588 printf(" TOF_INIT ");
589 for(i=0;i<35;i++) printf("*");
592 // Set id of TOF sensitive volume
593 fIdSens=pMC->VolId("FPG2");
595 for(i=0;i<80;i++) printf("*");
602 //___________________________________________
603 AliTOFhit::AliTOFhit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
610 for (i=0;i<3;i++) fVolume[i] = vol[i];