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 inside the
47 // SPACE FRAME WITH HOLES
55 // University of Salerno - Italy
60 <img src="picts/AliTOFv0Class.gif">
64 ///////////////////////////////////////////////////////////////////////////////
75 //_____________________________________________________________________________
79 // Default constructor
83 //_____________________________________________________________________________
84 AliTOFv0::AliTOFv0(const char *name, const char *title)
88 // Standard constructor
91 // Check that FRAME is there otherwise we have no place where to
93 AliModule* FRAME=gAlice->GetModule("FRAME");
95 Error("Ctor","TOF needs FRAME to be present\n");
98 if(FRAME->IsVersion()!=0) {
99 Error("Ctor","FRAME version 0 needed with this version of TOF\n");
105 //_____________________________________________________________________________
106 void AliTOFv0::CreateGeometry()
109 // Create geometry for Time Of Flight version 0
113 <img src="picts/AliTOFv0.gif">
117 // Creates common geometry
119 AliTOF::CreateGeometry();
122 //_____________________________________________________________________________
123 void AliTOFv0::TOFpc(Float_t xtof, Float_t ytof, Float_t zlen1,
124 Float_t zlen2, Float_t zlen3, Float_t ztof0)
127 // Definition of the Time Of Fligh Resistive Plate Chambers
128 // xFLT, yFLT, zFLT - sizes of TOF modules (large)
135 Int_t *idtmed = fIdtmed->GetArray()-499;
141 gMC->Gsvolu("FTO1", "BOX ", idtmed[506], par, 3);
143 gMC->Gsvolu("FTO2", "BOX ", idtmed[506], par, 3);
145 gMC->Gsvolu("FTO3", "BOX ", idtmed[506], par, 3);
148 // Positioning of modules
152 Float_t zcor1 = ztof0 - zlen1/2;
153 Float_t zcor2 = ztof0 - zlen1 - zlen2/2.;
156 AliMatrix(idrotm[0], 90., 0., 0., 0., 90, -90.);
157 AliMatrix(idrotm[1], 90., 180., 0., 0., 90, 90.);
158 gMC->Gspos("FTO1", 1, "BTO1", 0, zcor1, 0, idrotm[0], "ONLY");
159 gMC->Gspos("FTO1", 2, "BTO1", 0, -zcor1, 0, idrotm[1], "ONLY");
161 gMC->Gspos("FTO1", 1, "BTO2", 0, zcoor, 0, idrotm[0], "ONLY");
163 gMC->Gspos("FTO1", 1, "BTO3", 0, zcoor, 0, idrotm[0], "ONLY");
165 gMC->Gspos("FTO2", 1, "BTO1", 0, zcor2, 0, idrotm[0], "ONLY");
166 gMC->Gspos("FTO2", 2, "BTO1", 0, -zcor2, 0, idrotm[1], "ONLY");
168 gMC->Gspos("FTO2", 0, "BTO2", 0, zcoor, 0, idrotm[0], "ONLY");
170 gMC->Gspos("FTO3", 0, "BTO1", 0, zcor3, 0, idrotm[0], "ONLY");
172 // Subtraction the distance to TOF module boundaries
175 Float_t xFLT, yFLT, zFLT1, zFLT2, zFLT3;
177 xFLT = xtof -(.5 +.5)*2;
183 // Sizes of MRPC pads
185 Float_t yPad = 0.505;
187 // Large not sensitive volumes with CO2
191 cout <<"************************* TOF geometry **************************"<<endl;
193 par[2] = (zFLT1 / 2.);
194 gMC->Gsvolu("FLT1", "BOX ", idtmed[506], par, 3); // CO2
195 gMC->Gspos("FLT1", 0, "FTO1", 0., 0., 0., 0, "ONLY");
197 par[2] = (zFLT2 / 2.);
198 gMC->Gsvolu("FLT2", "BOX ", idtmed[506], par, 3); // CO2
199 gMC->Gspos("FLT2", 0, "FTO2", 0., 0., 0., 0, "ONLY");
201 par[2] = (zFLT3 / 2.);
202 gMC->Gsvolu("FLT3", "BOX ", idtmed[506], par, 3); // CO2
203 gMC->Gspos("FLT3", 0, "FTO3", 0., 0., 0., 0, "ONLY");
205 ////////// Layers before detector ////////////////////
207 // Alluminium layer in front 1.0 mm thick at the beginning
211 ycoor = -yFLT/2 + par[1];
212 gMC->Gsvolu("FMY1", "BOX ", idtmed[508], par, 3); // Alluminium
213 gMC->Gspos("FMY1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
214 gMC->Gsvolu("FMY2", "BOX ", idtmed[508], par, 3); // Alluminium
215 gMC->Gspos("FMY2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
216 gMC->Gsvolu("FMY3", "BOX ", idtmed[508], par, 3); // Alluminium
217 gMC->Gspos("FMY3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
219 // Honeycomb layer (1cm of special polyethilene)
220 ycoor = ycoor + par[1];
224 ycoor = ycoor + par[1];
225 gMC->Gsvolu("FPL1", "BOX ", idtmed[503], par, 3); // Hony
226 gMC->Gspos("FPL1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
227 gMC->Gsvolu("FPL2", "BOX ", idtmed[503], par, 3); // Hony
228 gMC->Gspos("FPL2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
229 gMC->Gsvolu("FPL3", "BOX ", idtmed[503], par, 3); // Hony
230 gMC->Gspos("FPL3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
232 ///////////////// Detector itself //////////////////////
234 const Float_t StripWidth = 7.81;//cm
235 const Float_t DeadBound = 1.;//cm non-sensitive between the pad edge and the boundary of the strip
236 const Int_t nx = 40; // number of pads along x
237 const Int_t nz = 2; // number of pads along z
238 const Float_t Gap=4.; //cm distance between the strip axis
239 const Float_t Space = 5.5; //cm distance from the front plate of the box
242 zSenStrip = StripWidth-2*DeadBound;//cm
246 par[2] = StripWidth/2.;
248 // Glass Layer of detector
249 gMC->Gsvolu("FSTR","BOX",idtmed[514],par,3);
251 // Freon for non-sesitive boundaries
255 gMC->Gsvolu("FNSF","BOX",idtmed[512],par,3);
256 gMC->Gspos("FNSF",0,"FSTR",0.,0.,0.,0,"ONLY");
257 // Mylar for non-sesitive boundaries
259 gMC->Gsvolu("FMYI","BOX",idtmed[510],par,3);
260 gMC->Gspos("FMYI",0,"FNSF",0.,0.,0.,0,"ONLY");
262 // Mylar for outer layers
264 ycoor = -yPad/2.+par[1];
265 gMC->Gsvolu("FMYX","BOX",idtmed[510],par,3);
266 gMC->Gspos("FMYX",1,"FSTR",0.,ycoor,0.,0,"ONLY");
267 gMC->Gspos("FMYX",2,"FSTR",0.,-ycoor,0.,0,"ONLY");
273 gMC->Gsvolu("FGRL","BOX",idtmed[502],par,3);
274 gMC->Gspos("FGRL",1,"FSTR",0.,ycoor,0.,0,"ONLY");
275 gMC->Gspos("FGRL",2,"FSTR",0.,-ycoor,0.,0,"ONLY");
277 // Freon sensitive layer
280 par[2] = zSenStrip/2.;
281 gMC->Gsvolu("FCFC","BOX",idtmed[513],par,3);
282 gMC->Gspos("FCFC",0,"FNSF",0.,0.,0.,0,"ONLY");
284 // Pad definition x & z
285 gMC->Gsdvn("FLZ","FCFC", nz, 3);
286 gMC->Gsdvn("FLX","FLZ" , nx, 1);
288 //// Positioning the Strips (FSTR) in the FLT volumes /////
292 Float_t t = zFLT1+zFLT2+zFLT3/2.+7.*2.5;//Half Width of Barrel
300 Int_t UpDown=-1; // UpDown=-1 -> Upper strip, UpDown=+1 -> Lower strip
305 AliMatrix (idrotm[nrot], 90., 0.,90.-ang,90.,-ang, 90.);
306 AliMatrix (idrotm[nrot+1],90.,180.,90.+ang,90.,ang, 90.);
307 ycoor = -14.5+ Space; //2 cm over front plate
308 ycoor += (1-(UpDown+1)/2)*Gap;
309 gMC->Gspos("FSTR",j ,"FLT3",0.,ycoor, zcoor,idrotm[nrot], "ONLY");
310 gMC->Gspos("FSTR",j+1,"FLT3",0.,ycoor,-zcoor,idrotm[nrot+1],"ONLY");
313 zcoor=zcoor-(zSenStrip/2)/TMath::Cos(ang)+UpDown*Gap*TMath::Tan(ang)-(zSenStrip/2)/TMath::Cos(ang);
314 UpDown*= -1; // Alternate strips
317 } while (zcoor-(StripWidth/2)*TMath::Cos(ang)>-t+zFLT1+zFLT2+7*2.5);
319 ycoor = -29./2.+ Space; //2 cm over front plate
323 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
324 Offset = StripWidth*TMath::Cos(ang)/2;
328 // UpDown has not to be reinitialized, so that the arrangement of the strips can continue coherently
331 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
333 AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
334 ycoor = -29./2.+ Space ; //2 cm over front plate
335 ycoor += (1-(UpDown+1)/2)*Gap;
336 zcoor = zpos+(zFLT3/2.+7+zFLT2/2); // Moves to the system of the centre of the modulus FLT2
337 gMC->Gspos("FSTR",i, "FLT2", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
339 zpos = zpos - (zSenStrip/2)/TMath::Cos(ang)+UpDown*Gap*TMath::Tan(ang)-(zSenStrip/2)/TMath::Cos(ang);
340 last = StripWidth*TMath::Cos(ang)/2;
343 } while (zpos-(StripWidth/2)*TMath::Cos(ang)>-t+zFLT1+7);
347 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
348 Offset = StripWidth*TMath::Cos(ang)/2.;
352 ycoor= -29./2.+Space+Gap/2;
355 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
357 AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
359 zcoor = zpos+(zFLT1/2+zFLT2+zFLT3/2+7.*2.);
360 gMC->Gspos("FSTR",i, "FLT1", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
362 zpos = zpos - zSenStrip/TMath::Cos(ang);
363 last = StripWidth*TMath::Cos(ang)/2.;
364 } while (zpos>-t+7.+last);
366 printf("#######################################################\n");
367 printf(" Distance from the bound of the FLT3: %f cm \n", t+zpos-(zSenStrip/2)/TMath::Cos(ang));
368 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
369 zpos = zpos - zSenStrip/TMath::Cos(ang);
370 printf("NEXT Distance from the bound of the FLT3: %f cm \n", t+zpos-(zSenStrip/2)/TMath::Cos(ang));
371 printf("#######################################################\n");
373 ////////// Layers after detector /////////////////
375 // Honeycomb layer after (3cm)
377 Float_t OverSpace = Space + 7.3;
378 /// StripWidth*TMath::Sin(ang) + 1.3;
383 ycoor = -yFLT/2 + OverSpace + par[1];
384 gMC->Gsvolu("FPE1", "BOX ", idtmed[503], par, 3); // Hony
385 gMC->Gspos("FPE1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
386 gMC->Gsvolu("FPE2", "BOX ", idtmed[503], par, 3); // Hony
387 gMC->Gspos("FPE2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
388 gMC->Gsvolu("FPE3", "BOX ", idtmed[503], par, 3); // Hony
389 gMC->Gspos("FPE3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
391 // Electronics (Cu) after
394 par[1] = 1.43*0.05 / 2.; // 5% of X0
397 gMC->Gsvolu("FEC1", "BOX ", idtmed[501], par, 3); // Cu
398 gMC->Gspos("FEC1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
399 gMC->Gsvolu("FEC2", "BOX ", idtmed[501], par, 3); // Cu
400 gMC->Gspos("FEC2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
401 gMC->Gsvolu("FEC3", "BOX ", idtmed[501], par, 3); // Cu
402 gMC->Gspos("FEC3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
404 // Cooling water after
407 par[1] = 36.1*0.02 / 2.; // 2% of X0
410 gMC->Gsvolu("FWA1", "BOX ", idtmed[515], par, 3); // Water
411 gMC->Gspos("FWA1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
412 gMC->Gsvolu("FWA2", "BOX ", idtmed[515], par, 3); // Water
413 gMC->Gspos("FWA2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
414 gMC->Gsvolu("FWA3", "BOX ", idtmed[515], par, 3); // Water
415 gMC->Gspos("FWA3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
417 //back plate honycomb (2cm)
421 ycoor = yFLT/2 - par[1];
422 gMC->Gsvolu("FEG1", "BOX ", idtmed[503], par, 3); // Hony
423 gMC->Gspos("FEG1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
424 gMC->Gsvolu("FEG2", "BOX ", idtmed[503], par, 3); // Hony
425 gMC->Gspos("FEG2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
426 gMC->Gsvolu("FEG3", "BOX ", idtmed[503], par, 3); // Hony
427 gMC->Gspos("FEG3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
430 //_____________________________________________________________________________
431 void AliTOFv0::DrawModule()
434 // Draw a shaded view of the Time Of Flight version 1
436 // Set everything unseen
437 gMC->Gsatt("*", "seen", -1);
439 // Set ALIC mother transparent
440 gMC->Gsatt("ALIC","SEEN",0);
442 // Set the volumes visible
443 gMC->Gsatt("ALIC","SEEN",0);
444 gMC->Gsatt("FBAR","SEEN",1);
445 gMC->Gsatt("FTO1","SEEN",1);
446 gMC->Gsatt("FTO2","SEEN",1);
447 gMC->Gsatt("FTO3","SEEN",1);
448 gMC->Gsatt("FBT1","SEEN",1);
449 gMC->Gsatt("FBT2","SEEN",1);
450 gMC->Gsatt("FBT3","SEEN",1);
451 gMC->Gsatt("FDT1","SEEN",1);
452 gMC->Gsatt("FDT2","SEEN",1);
453 gMC->Gsatt("FDT3","SEEN",1);
454 gMC->Gsatt("FLT1","SEEN",1);
455 gMC->Gsatt("FLT2","SEEN",1);
456 gMC->Gsatt("FLT3","SEEN",1);
457 gMC->Gsatt("FPL1","SEEN",1);
458 gMC->Gsatt("FPL2","SEEN",1);
459 gMC->Gsatt("FPL3","SEEN",1);
460 gMC->Gsatt("FLD1","SEEN",1);
461 gMC->Gsatt("FLD2","SEEN",1);
462 gMC->Gsatt("FLD3","SEEN",1);
463 gMC->Gsatt("FLZ1","SEEN",1);
464 gMC->Gsatt("FLZ2","SEEN",1);
465 gMC->Gsatt("FLZ3","SEEN",1);
466 gMC->Gsatt("FLX1","SEEN",1);
467 gMC->Gsatt("FLX2","SEEN",1);
468 gMC->Gsatt("FLX3","SEEN",1);
469 gMC->Gsatt("FPA0","SEEN",1);
471 gMC->Gdopt("hide", "on");
472 gMC->Gdopt("shad", "on");
473 gMC->Gsatt("*", "fill", 7);
474 gMC->SetClipBox(".");
475 gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
477 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
478 gMC->Gdhead(1111, "Time Of Flight");
479 gMC->Gdman(18, 4, "MAN");
480 gMC->Gdopt("hide","off");
483 //_____________________________________________________________________________
484 void AliTOFv0::CreateMaterials()
487 // Define materials for the Time Of Flight
489 AliTOF::CreateMaterials();
492 //_____________________________________________________________________________
493 void AliTOFv0::Init()
496 // Initialise the detector after the geometry has been defined
498 printf("**************************************"
500 "**************************************\n");
501 printf("\n Version 0 of TOF initialing, "
502 "with openings for PHOS and RICH\n\n");
506 fIdFTO2=gMC->VolId("FTO2");
507 fIdFTO3=gMC->VolId("FTO3");
508 fIdFLT1=gMC->VolId("FLT1");
509 fIdFLT2=gMC->VolId("FLT2");
510 fIdFLT3=gMC->VolId("FLT3");
512 printf("**************************************"
514 "**************************************\n");
517 //_____________________________________________________________________________
518 void AliTOFv0::StepManager()
521 // Procedure called at each step in the Time Of Flight
523 TLorentzVector mom, pos;
524 Float_t hits[8],rho,phi,phid,z;
525 Int_t sector, plate, pad_x, pad_z, strip;
526 Int_t copy, pad_z_id, pad_x_id, strip_id, i;
527 Int_t *idtmed = fIdtmed->GetArray()-499;
530 if(gMC->GetMedium()==idtmed[513] &&
531 gMC->IsTrackEntering() && gMC->TrackCharge()
532 && gMC->CurrentVolID(copy)==fIdSens)
534 TClonesArray &lhits = *fHits;
536 //_________getting information about hit volumes_____________
538 pad_z_id=gMC->CurrentVolOffID(2,copy);
541 pad_x_id=gMC->CurrentVolOffID(1,copy);
544 strip_id=gMC->CurrentVolOffID(5,copy);
547 pad_z = (strip-1)*2+pad_z;
549 gMC->TrackPosition(pos);
550 gMC->TrackMomentum(mom);
552 rho = sqrt(pos[0]*pos[0]+pos[1]*pos[1]);
553 phi = TMath::ACos(pos[0]/rho);
554 Float_t as = TMath::ASin(pos[1]/rho);
555 if (as<0) phi = 2*3.141592654-phi;
559 if (z<= 62. && z>=-62.) plate = 3;
560 if (z<= 216. && z>62.) plate = 4;
561 if (z>=-216. && z<-62.) plate = 2;
562 if (z>216.) plate = 5;
563 if (z<-216.) plate = 1;
566 sector = Int_t (phid/20.);
569 Double_t ptot=mom.Rho();
570 Double_t norm=1/ptot;
573 hits[i+3]=mom[i]*norm;
577 new(lhits[fNhits++]) AliTOFhit(fIshunt,gAlice->CurrentTrack(),sector, plate, pad_x, pad_z, hits);