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 **************************************************************************/
18 Revision 1.14 1999/11/05 22:39:06 fca
21 Revision 1.13 1999/11/01 20:41:57 fca
22 Added protections against using the wrong version of FRAME
24 Revision 1.12 1999/10/22 08:04:14 fca
25 Correct improper use of negative parameters
27 Revision 1.11 1999/10/16 19:30:05 fca
28 Corrected Rotation Matrix and CVS log
30 Revision 1.10 1999/10/15 15:35:20 fca
31 New version for frame1099 with and without holes
33 Revision 1.9 1999/09/29 09:24:33 fca
34 Introduction of the Copyright and cvs Log
38 ///////////////////////////////////////////////////////////////////////////////
40 // Time Of Flight: design of C.Williams FCA //
41 // This class contains the functions for version 1 of the Time Of Flight //
44 // VERSION WITH 5 MODULES AND TILTED STRIPS
46 // WITH HOLES FOR PHOS AND HMPID
47 // INSIDE A FULL COVERAGE SPACE FRAME
55 // University of Salerno - Italy
61 <img src="picts/AliTOFv2Class.gif">
65 ///////////////////////////////////////////////////////////////////////////////
76 //_____________________________________________________________________________
80 // Default constructor
84 //_____________________________________________________________________________
85 AliTOFv2::AliTOFv2(const char *name, const char *title)
89 // Standard constructor
92 // Check that FRAME is there otherwise we have no place where to
94 AliModule* FRAME=gAlice->GetModule("FRAME");
96 Error("Ctor","TOF needs FRAME to be present\n");
99 if(FRAME->IsVersion()!=1) {
100 Error("Ctor","FRAME version 1 needed with this version of TOF\n");
106 //_____________________________________________________________________________
107 void AliTOFv2::CreateGeometry()
110 // Create geometry for Time Of Flight version 0
114 <img src="picts/AliTOFv2.gif">
118 // Creates common geometry
120 AliTOF::CreateGeometry();
123 //_____________________________________________________________________________
124 void AliTOFv2::TOFpc(Float_t xtof, Float_t ytof, Float_t zlen1,
125 Float_t zlen2, Float_t zlen3, Float_t ztof0)
128 // Definition of the Time Of Fligh Resistive Plate Chambers
129 // xFLT, yFLT, zFLT - sizes of TOF modules (large)
133 Float_t ycoor, zcoor;
136 Int_t *idtmed = fIdtmed->GetArray()-499;
142 gMC->Gsvolu("FTO1", "BOX ", idtmed[506], par, 3);
144 gMC->Gsvolu("FTO2", "BOX ", idtmed[506], par, 3);
146 gMC->Gsvolu("FTO3", "BOX ", idtmed[506], par, 3);
149 // Position of modules
150 Float_t zcor1 = ztof0 - zlen1/2;
151 Float_t zcor2 = ztof0 - zlen1 - zlen2/2.;
154 AliMatrix(idrotm[0], 90., 0., 0., 0., 90, -90.);
155 AliMatrix(idrotm[1], 90., 180., 0., 0., 90, 90.);
156 gMC->Gspos("FTO1", 1, "BTO1", 0, zcor1, 0, idrotm[0], "ONLY");
157 gMC->Gspos("FTO1", 2, "BTO1", 0, -zcor1, 0, idrotm[1], "ONLY");
158 gMC->Gspos("FTO1", 1, "BTO2", 0, zcor1, 0, idrotm[0], "ONLY");
159 gMC->Gspos("FTO1", 2, "BTO2", 0, -zcor1, 0, idrotm[1], "ONLY");
160 gMC->Gspos("FTO1", 1, "BTO3", 0, zcor1, 0, idrotm[0], "ONLY");
161 gMC->Gspos("FTO1", 2, "BTO3", 0, -zcor1, 0, idrotm[1], "ONLY");
163 gMC->Gspos("FTO2", 1, "BTO1", 0, zcor2, 0, idrotm[0], "ONLY");
164 gMC->Gspos("FTO2", 2, "BTO1", 0, -zcor2, 0, idrotm[1], "ONLY");
165 gMC->Gspos("FTO2", 1, "BTO2", 0, zcor2, 0, idrotm[0], "ONLY");
166 gMC->Gspos("FTO2", 2, "BTO2", 0, -zcor2, 0, idrotm[1], "ONLY");
168 gMC->Gspos("FTO3", 0, "BTO1", 0, zcor3, 0, idrotm[0], "ONLY");
170 // Subtraction the distance to TOF module boundaries
173 Float_t xFLT, yFLT, zFLT1, zFLT2, zFLT3;
175 xFLT = xtof -(.5 +.5)*2;
182 // Sizes of MRPC pads
184 Float_t yPad = 0.505;
186 // Large not sensitive volumes with CO2
190 cout <<"************************* TOF geometry **************************"<<endl;
192 par[2] = (zFLT1 / 2.);
193 gMC->Gsvolu("FLT1", "BOX ", idtmed[506], par, 3); // CO2
194 gMC->Gspos("FLT1", 0, "FTO1", 0., 0., 0., 0, "ONLY");
196 par[2] = (zFLT2 / 2.);
197 gMC->Gsvolu("FLT2", "BOX ", idtmed[506], par, 3); // CO2
198 gMC->Gspos("FLT2", 0, "FTO2", 0., 0., 0., 0, "ONLY");
200 par[2] = (zFLT3 / 2.);
201 gMC->Gsvolu("FLT3", "BOX ", idtmed[506], par, 3); // CO2
202 gMC->Gspos("FLT3", 0, "FTO3", 0., 0., 0., 0, "ONLY");
204 ////////// Layers before detector ////////////////////
206 // Alluminium layer in front 1.0 mm thick at the beginning
210 ycoor = -yFLT/2 + par[1];
211 gMC->Gsvolu("FMY1", "BOX ", idtmed[508], par, 3); // Alluminium
212 gMC->Gspos("FMY1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
213 gMC->Gsvolu("FMY2", "BOX ", idtmed[508], par, 3); // Alluminium
214 gMC->Gspos("FMY2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
215 gMC->Gsvolu("FMY3", "BOX ", idtmed[508], par, 3); // Alluminium
216 gMC->Gspos("FMY3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
218 // Honeycomb layer (1cm of special polyethilene)
219 ycoor = ycoor + par[1];
223 ycoor = ycoor + par[1];
224 gMC->Gsvolu("FPL1", "BOX ", idtmed[503], par, 3); // Hony
225 gMC->Gspos("FPL1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
226 gMC->Gsvolu("FPL2", "BOX ", idtmed[503], par, 3); // Hony
227 gMC->Gspos("FPL2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
228 gMC->Gsvolu("FPL3", "BOX ", idtmed[503], par, 3); // Hony
229 gMC->Gspos("FPL3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
231 ///////////////// Detector itself //////////////////////
233 const Float_t StripWidth = 7.81;//cm
234 const Float_t DeadBound = 1.;//cm non-sensitive between the pad edge and the boundary of the strip
235 const Int_t nx = 40; // number of pads along x
236 const Int_t nz = 2; // number of pads along z
237 const Float_t Gap=4.; //cm distance between the strip axis
238 const Float_t Space = 5.5; //cm distance from the front plate of the box
241 zSenStrip = StripWidth-2*DeadBound;//cm
245 par[2] = StripWidth/2.;
247 // Glass Layer of detector
248 gMC->Gsvolu("FSTR","BOX",idtmed[514],par,3);
250 // Freon for non-sesitive boundaries
254 gMC->Gsvolu("FNSF","BOX",idtmed[512],par,3);
255 gMC->Gspos("FNSF",0,"FSTR",0.,0.,0.,0,"ONLY");
256 // Mylar for non-sesitive boundaries
258 gMC->Gsvolu("FMYI","BOX",idtmed[510],par,3);
259 gMC->Gspos("FMYI",0,"FNSF",0.,0.,0.,0,"ONLY");
261 // Mylar for outer layers
263 ycoor = -yPad/2.+par[1];
264 gMC->Gsvolu("FMYX","BOX",idtmed[510],par,3);
265 gMC->Gspos("FMYX",1,"FSTR",0.,ycoor,0.,0,"ONLY");
266 gMC->Gspos("FMYX",2,"FSTR",0.,-ycoor,0.,0,"ONLY");
272 gMC->Gsvolu("FGRL","BOX",idtmed[502],par,3);
273 gMC->Gspos("FGRL",1,"FSTR",0.,ycoor,0.,0,"ONLY");
274 gMC->Gspos("FGRL",2,"FSTR",0.,-ycoor,0.,0,"ONLY");
276 // Freon sensitive layer
279 par[2] = zSenStrip/2.;
280 gMC->Gsvolu("FCFC","BOX",idtmed[513],par,3);
281 gMC->Gspos("FCFC",0,"FNSF",0.,0.,0.,0,"ONLY");
283 // Pad definition x & z
284 gMC->Gsdvn("FLZ","FCFC", nz, 3);
285 gMC->Gsdvn("FLX","FLZ" , nx, 1);
291 gMC->Gsvolu("FPAD", "BOX ", idtmed[513], par, 3);
292 gMC->Gspos("FPAD", 0, "FLX", 0., 0., 0., 0, "ONLY");
295 //// Positioning the Strips (FSTR) in the FLT volumes /////
299 Float_t t = zFLT1+zFLT2+zFLT3/2.+7.*2.5;//Half Width of Barrel
307 Int_t UpDown=-1; // UpDown=-1 -> Upper strip, UpDown=+1 -> Lower strip
312 AliMatrix (idrotm[nrot] ,90., 0.,90.-ang,90.,-ang,90.);
313 AliMatrix (idrotm[nrot+1],90.,180.,90.+ang,90.,ang,90.);
314 ycoor = -29./2.+ Space; //2 cm over front plate
315 ycoor += (1-(UpDown+1)/2)*Gap;
316 gMC->Gspos("FSTR",j,"FLT3",0.,ycoor,zcoor,idrotm[nrot],"ONLY");
317 gMC->Gspos("FSTR",j+1,"FLT3",0.,ycoor,-zcoor,idrotm[nrot+1],"ONLY");
320 zcoor=zcoor-(zSenStrip/2)/TMath::Cos(ang)+UpDown*Gap*TMath::Tan(ang)-(zSenStrip/2)/TMath::Cos(ang);
321 UpDown*= -1; // Alternate strips
324 } while (zcoor-(StripWidth/2)*TMath::Cos(ang)>-t+zFLT1+zFLT2+7*2.5);
326 ycoor = -29./2.+ Space; //2 cm over front plate
330 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
331 Offset = StripWidth*TMath::Cos(ang)/2;
335 // UpDown has not to be reinitialized, so that the arrangement of the strips can continue coherently
338 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
340 AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
341 ycoor = -29./2.+ Space ; //2 cm over front plate
342 ycoor += (1-(UpDown+1)/2)*Gap;
343 zcoor = zpos+(zFLT3/2.+7+zFLT2/2); // Moves to the system of the centre of the modulus FLT2
344 gMC->Gspos("FSTR",i, "FLT2", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
346 zpos = zpos - (zSenStrip/2)/TMath::Cos(ang)+UpDown*Gap*TMath::Tan(ang)-(zSenStrip/2)/TMath::Cos(ang);
347 last = StripWidth*TMath::Cos(ang)/2;
350 } while (zpos-(StripWidth/2)*TMath::Cos(ang)>-t+zFLT1+7);
354 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
355 Offset = StripWidth*TMath::Cos(ang)/2.;
359 ycoor= -29./2.+Space+Gap/2;
362 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
364 AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
366 zcoor = zpos+(zFLT1/2+zFLT2+zFLT3/2+7.*2.);
367 gMC->Gspos("FSTR",i, "FLT1", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
369 zpos = zpos - zSenStrip/TMath::Cos(ang);
370 last = StripWidth*TMath::Cos(ang)/2.;
371 } while (zpos>-t+7.+last);
373 printf("#######################################################\n");
374 printf(" Distance from the bound of the FLT3: zFLT3- %f cm \n", t+zpos-(zSenStrip/2)/TMath::Cos(ang));
375 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
376 zpos = zpos - zSenStrip/TMath::Cos(ang);
377 printf("NEXT Distance from the bound of the FLT3: zFLT3- %f cm \n", t+zpos-(zSenStrip/2)/TMath::Cos(ang));
378 printf("#######################################################\n");
380 ////////// Layers after detector /////////////////
382 // Honeycomb layer after (3cm)
384 Float_t OverSpace = Space + 7.3;
385 /// StripWidth*TMath::Sin(ang) + 1.3;
390 ycoor = -yFLT/2 + OverSpace + par[1];
391 gMC->Gsvolu("FPE1", "BOX ", idtmed[503], par, 3); // Hony
392 gMC->Gspos("FPE1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
393 gMC->Gsvolu("FPE2", "BOX ", idtmed[503], par, 3); // Hony
394 gMC->Gspos("FPE2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
395 gMC->Gsvolu("FPE3", "BOX ", idtmed[503], par, 3); // Hony
396 gMC->Gspos("FPE3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
398 // Electronics (Cu) after
401 par[1] = 1.43*0.05 / 2.; // 5% of X0
404 gMC->Gsvolu("FEC1", "BOX ", idtmed[501], par, 3); // Cu
405 gMC->Gspos("FEC1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
406 gMC->Gsvolu("FEC2", "BOX ", idtmed[501], par, 3); // Cu
407 gMC->Gspos("FEC2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
408 gMC->Gsvolu("FEC3", "BOX ", idtmed[501], par, 3); // Cu
409 gMC->Gspos("FEC3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
411 // Cooling water after
414 par[1] = 36.1*0.02 / 2.; // 2% of X0
417 gMC->Gsvolu("FWA1", "BOX ", idtmed[515], par, 3); // Water
418 gMC->Gspos("FWA1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
419 gMC->Gsvolu("FWA2", "BOX ", idtmed[515], par, 3); // Water
420 gMC->Gspos("FWA2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
421 gMC->Gsvolu("FWA3", "BOX ", idtmed[515], par, 3); // Water
422 gMC->Gspos("FWA3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
424 //back plate honycomb (2cm)
428 ycoor = yFLT/2 - par[1];
429 gMC->Gsvolu("FEG1", "BOX ", idtmed[503], par, 3); // Hony
430 gMC->Gspos("FEG1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
431 gMC->Gsvolu("FEG2", "BOX ", idtmed[503], par, 3); // Hony
432 gMC->Gspos("FEG2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
433 gMC->Gsvolu("FEG3", "BOX ", idtmed[503], par, 3); // Hony
434 gMC->Gspos("FEG3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
437 //_____________________________________________________________________________
438 void AliTOFv2::DrawModule()
441 // Draw a shaded view of the Time Of Flight version 1
443 // Set everything unseen
444 gMC->Gsatt("*", "seen", -1);
446 // Set ALIC mother transparent
447 gMC->Gsatt("ALIC","SEEN",0);
449 // Set the volumes visible
450 gMC->Gsatt("ALIC","SEEN",0);
451 gMC->Gsatt("FBAR","SEEN",1);
452 gMC->Gsatt("FTO1","SEEN",1);
453 gMC->Gsatt("FTO2","SEEN",1);
454 gMC->Gsatt("FTO3","SEEN",1);
455 gMC->Gsatt("FBT1","SEEN",1);
456 gMC->Gsatt("FBT2","SEEN",1);
457 gMC->Gsatt("FBT3","SEEN",1);
458 gMC->Gsatt("FDT1","SEEN",1);
459 gMC->Gsatt("FDT2","SEEN",1);
460 gMC->Gsatt("FDT3","SEEN",1);
461 gMC->Gsatt("FLT1","SEEN",1);
462 gMC->Gsatt("FLT2","SEEN",1);
463 gMC->Gsatt("FLT3","SEEN",1);
464 gMC->Gsatt("FPL1","SEEN",1);
465 gMC->Gsatt("FPL2","SEEN",1);
466 gMC->Gsatt("FPL3","SEEN",1);
467 gMC->Gsatt("FLD1","SEEN",1);
468 gMC->Gsatt("FLD2","SEEN",1);
469 gMC->Gsatt("FLD3","SEEN",1);
470 gMC->Gsatt("FLZ1","SEEN",1);
471 gMC->Gsatt("FLZ2","SEEN",1);
472 gMC->Gsatt("FLZ3","SEEN",1);
473 gMC->Gsatt("FLX1","SEEN",1);
474 gMC->Gsatt("FLX2","SEEN",1);
475 gMC->Gsatt("FLX3","SEEN",1);
476 gMC->Gsatt("FPA0","SEEN",1);
478 gMC->Gdopt("hide", "on");
479 gMC->Gdopt("shad", "on");
480 gMC->Gsatt("*", "fill", 7);
481 gMC->SetClipBox(".");
482 gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
484 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
485 gMC->Gdhead(1111, "Time Of Flight");
486 gMC->Gdman(18, 4, "MAN");
487 gMC->Gdopt("hide","off");
490 //_____________________________________________________________________________
491 void AliTOFv2::CreateMaterials()
494 // Define materials for the Time Of Flight
496 AliTOF::CreateMaterials();
499 //_____________________________________________________________________________
500 void AliTOFv2::Init()
503 // Initialise the detector after the geometry has been defined
505 printf("**************************************"
507 "**************************************\n");
508 printf("\n Version 2 of TOF initialing, "
509 "with openings for PHOS and RICH in symmetric frame\n\n");
513 fIdFTO2=gMC->VolId("FTO2");
514 fIdFTO3=gMC->VolId("FTO3");
515 fIdFLT1=gMC->VolId("FLT1");
516 fIdFLT2=gMC->VolId("FLT2");
517 fIdFLT3=gMC->VolId("FLT3");
518 printf("**************************************"
520 "**************************************\n");
523 //_____________________________________________________________________________
524 void AliTOFv2::StepManager()
527 // Procedure called at each step in the Time Of Flight
529 TLorentzVector mom, pos;
530 Float_t hits[8],rho,phi,phid,z;
531 Int_t sector, plate, pad_x, pad_z, strip;
532 Int_t copy, pad_z_id, pad_x_id, strip_id, i;
533 Int_t *idtmed = fIdtmed->GetArray()-499;
536 if(gMC->GetMedium()==idtmed[513] &&
537 gMC->IsTrackEntering() && gMC->TrackCharge()
538 && gMC->CurrentVolID(copy)==fIdSens)
540 TClonesArray &lhits = *fHits;
542 //_________getting information about hit volumes_____________
544 pad_z_id=gMC->CurrentVolOffID(2,copy);
547 pad_x_id=gMC->CurrentVolOffID(1,copy);
550 strip_id=gMC->CurrentVolOffID(5,copy);
553 pad_z = (strip-1)*2+pad_z;
555 gMC->TrackPosition(pos);
556 gMC->TrackMomentum(mom);
558 rho = sqrt(pos[0]*pos[0]+pos[1]*pos[1]);
559 phi = TMath::ACos(pos[0]/rho);
560 Float_t as = TMath::ASin(pos[1]/rho);
561 if (as<0) phi = 2*3.141592654-phi;
565 if (z<=62. && z>=-62) plate = 3;
566 if (z<=216. && z>62.) plate = 4;
567 if (z>=-216. && z<-62.) plate = 2;
568 if (z>216.) plate = 5;
569 if (z<-216.) plate = 1;
572 sector = Int_t (phid/20.);
575 Double_t ptot=mom.Rho();
576 Double_t norm=1/ptot;
579 hits[i+3]=mom[i]*norm;
583 new(lhits[fNhits++]) AliTOFhit(fIshunt,gAlice->CurrentTrack(),sector, plate, pad_x, pad_z, hits);