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 1.11 1999/10/16 19:30:05 fca
19 Corrected Rotation Matrix and CVS log
21 Revision 1.10 1999/10/15 15:35:20 fca
22 New version for frame1099 with and without holes
24 Revision 1.9 1999/09/29 09:24:33 fca
25 Introduction of the Copyright and cvs Log
29 ///////////////////////////////////////////////////////////////////////////////
31 // Time Of Flight: design of C.Williams FCA //
32 // This class contains the functions for version 1 of the Time Of Flight //
35 // VERSION WITH 5 MODULES AND TILTED STRIPS
37 // WITH HOLES FOR PHOS AND HMPID inside the
38 // SPACE FRAME WITH HOLES
46 // University of Salerno - Italy
51 <img src="picts/AliTOFv0Class.gif">
55 ///////////////////////////////////////////////////////////////////////////////
63 //_____________________________________________________________________________
67 // Default constructor
71 //_____________________________________________________________________________
72 AliTOFv0::AliTOFv0(const char *name, const char *title)
76 // Standard constructor
80 //_____________________________________________________________________________
81 void AliTOFv0::CreateGeometry()
84 // Create geometry for Time Of Flight version 0
88 <img src="picts/AliTOFv0.gif">
92 // Creates common geometry
94 AliTOF::CreateGeometry();
97 //_____________________________________________________________________________
98 void AliTOFv0::TOFpc(Float_t xtof, Float_t ytof, Float_t zlen1,
99 Float_t zlen2, Float_t zlen3, Float_t ztof0)
102 // Definition of the Time Of Fligh Resistive Plate Chambers
103 // xFLT, yFLT, zFLT - sizes of TOF modules (large)
110 Int_t *idtmed = fIdtmed->GetArray()-499;
116 gMC->Gsvolu("FTO1", "BOX ", idtmed[506], par, 3);
118 gMC->Gsvolu("FTO2", "BOX ", idtmed[506], par, 3);
120 gMC->Gsvolu("FTO3", "BOX ", idtmed[506], par, 3);
123 // Positioning of modules
127 Float_t zcor1 = ztof0 - zlen1/2;
128 Float_t zcor2 = ztof0 - zlen1 - zlen2/2.;
131 AliMatrix(idrotm[0], 90., 0., 0., 0., 90, -90.);
132 AliMatrix(idrotm[1], 90., 180., 0., 0., 90, 90.);
133 gMC->Gspos("FTO1", 1, "BTO1", 0, zcor1, 0, idrotm[0], "ONLY");
134 gMC->Gspos("FTO1", 2, "BTO1", 0, -zcor1, 0, idrotm[1], "ONLY");
136 gMC->Gspos("FTO1", 1, "BTO2", 0, zcoor, 0, idrotm[0], "ONLY");
138 gMC->Gspos("FTO1", 1, "BTO3", 0, zcoor, 0, idrotm[0], "ONLY");
140 gMC->Gspos("FTO2", 1, "BTO1", 0, zcor2, 0, idrotm[0], "ONLY");
141 gMC->Gspos("FTO2", 2, "BTO1", 0, -zcor2, 0, idrotm[1], "ONLY");
143 gMC->Gspos("FTO2", 0, "BTO2", 0, zcoor, 0, idrotm[0], "ONLY");
145 gMC->Gspos("FTO3", 0, "BTO1", 0, zcor3, 0, idrotm[0], "ONLY");
147 // Subtraction the distance to TOF module boundaries
150 Float_t xFLT, yFLT, zFLT1, zFLT2, zFLT3;
152 xFLT = xtof -(.5 +.5)*2;
158 // Sizes of MRPC pads
160 Float_t yPad = 0.505;
162 // Large not sensitive volumes with CO2
166 cout <<"************************* TOF geometry **************************"<<endl;
168 par[2] = (zFLT1 / 2.);
169 gMC->Gsvolu("FLT1", "BOX ", idtmed[506], par, 3); // CO2
170 gMC->Gspos("FLT1", 0, "FTO1", 0., 0., 0., 0, "ONLY");
172 par[2] = (zFLT2 / 2.);
173 gMC->Gsvolu("FLT2", "BOX ", idtmed[506], par, 3); // CO2
174 gMC->Gspos("FLT2", 0, "FTO2", 0., 0., 0., 0, "ONLY");
176 par[2] = (zFLT3 / 2.);
177 gMC->Gsvolu("FLT3", "BOX ", idtmed[506], par, 3); // CO2
178 gMC->Gspos("FLT3", 0, "FTO3", 0., 0., 0., 0, "ONLY");
180 ////////// Layers before detector ////////////////////
182 // Alluminium layer in front 1.0 mm thick at the beginning
186 ycoor = -yFLT/2 + par[1];
187 gMC->Gsvolu("FMY1", "BOX ", idtmed[508], par, 3); // Alluminium
188 gMC->Gspos("FMY1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
189 gMC->Gsvolu("FMY2", "BOX ", idtmed[508], par, 3); // Alluminium
190 gMC->Gspos("FMY2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
191 gMC->Gsvolu("FMY3", "BOX ", idtmed[508], par, 3); // Alluminium
192 gMC->Gspos("FMY3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
194 // Honeycomb layer (1cm of special polyethilene)
195 ycoor = ycoor + par[1];
199 ycoor = ycoor + par[1];
200 gMC->Gsvolu("FPL1", "BOX ", idtmed[503], par, 3); // Hony
201 gMC->Gspos("FPL1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
202 gMC->Gsvolu("FPL2", "BOX ", idtmed[503], par, 3); // Hony
203 gMC->Gspos("FPL2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
204 gMC->Gsvolu("FPL3", "BOX ", idtmed[503], par, 3); // Hony
205 gMC->Gspos("FPL3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
207 ///////////////// Detector itself //////////////////////
209 const Float_t StripWidth = 7.81;//cm
210 const Float_t DeadBound = 1.;//cm non-sensitive between the pad edge and the boundary of the strip
211 const Int_t nx = 40; // number of pads along x
212 const Int_t nz = 2; // number of pads along z
213 const Float_t Gap=4.; //cm distance between the strip axis
214 const Float_t Space = 5.5; //cm distance from the front plate of the box
217 zSenStrip = StripWidth-2*DeadBound;//cm
221 par[2] = StripWidth/2.;
223 // Glass Layer of detector
224 gMC->Gsvolu("FSTR","BOX",idtmed[514],par,3);
226 // Freon for non-sesitive boundaries
230 gMC->Gsvolu("FNSF","BOX",idtmed[512],par,3);
231 gMC->Gspos("FNSF",0,"FSTR",0.,0.,0.,0,"ONLY");
232 // Mylar for non-sesitive boundaries
234 gMC->Gsvolu("FMYI","BOX",idtmed[510],par,3);
235 gMC->Gspos("FMYI",0,"FNSF",0.,0.,0.,0,"ONLY");
237 // Mylar for outer layers
239 ycoor = -yPad/2.+par[1];
240 gMC->Gsvolu("FMYX","BOX",idtmed[510],par,3);
241 gMC->Gspos("FMYX",1,"FSTR",0.,ycoor,0.,0,"ONLY");
242 gMC->Gspos("FMYX",2,"FSTR",0.,-ycoor,0.,0,"ONLY");
248 gMC->Gsvolu("FGRL","BOX",idtmed[502],par,3);
249 gMC->Gspos("FGRL",1,"FSTR",0.,ycoor,0.,0,"ONLY");
250 gMC->Gspos("FGRL",2,"FSTR",0.,-ycoor,0.,0,"ONLY");
252 // Freon sensitive layer
255 par[2] = zSenStrip/2.;
256 gMC->Gsvolu("FCFC","BOX",idtmed[513],par,3);
257 gMC->Gspos("FCFC",0,"FNSF",0.,0.,0.,0,"ONLY");
259 // Pad definition x & z
260 gMC->Gsdvn("FLZ","FCFC", nz, 3);
261 gMC->Gsdvn("FLX","FLZ" , nx, 1);
264 //// Positioning the Strips (FSTR) in the FLT volumes /////
267 Float_t t = zFLT1+zFLT2+zFLT3/2.+7.*2.5;//Half Width of Barrel
275 Int_t UpDown=-1; // UpDown=-1 -> Upper strip, UpDown=+1 -> Lower strip
280 AliMatrix (idrotm[nrot], 90., 0.,90.-ang,90.,-ang,90.);
281 AliMatrix (idrotm[nrot+1],90.,180.,90.+ang,90., ang,90.);
282 ycoor = -14.5+ Space; //2 cm over front plate
283 ycoor += (1-(UpDown+1)/2)*Gap;
284 gMC->Gspos("FSTR",j ,"FLT3",0.,ycoor, zcoor,idrotm[nrot], "ONLY");
285 gMC->Gspos("FSTR",j+1,"FLT3",0.,ycoor,-zcoor,idrotm[nrot+1],"ONLY");
288 zcoor=zcoor-(zSenStrip/2)/TMath::Cos(ang)+UpDown*Gap*TMath::Tan(ang)-(zSenStrip/2)/TMath::Cos(ang);
289 UpDown*= -1; // Alternate strips
292 } while (zcoor-(StripWidth/2)*TMath::Cos(ang)>-t+zFLT1+zFLT2+7*2.5);
294 ycoor = -29./2.+ Space; //2 cm over front plate
298 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
299 Offset = StripWidth*TMath::Cos(ang)/2;
303 // UpDown has not to be reinitialized, so that the arrangement of the strips can continue coherently
306 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
308 AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang,270.);
309 ycoor = -29./2.+ Space ; //2 cm over front plate
310 ycoor += (1-(UpDown+1)/2)*Gap;
311 zcoor = zpos+(zFLT3/2.+7+zFLT2/2); // Moves to the system of the centre of the modulus FLT2
312 gMC->Gspos("FSTR",i, "FLT2", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
314 zpos = zpos - (zSenStrip/2)/TMath::Cos(ang)+UpDown*Gap*TMath::Tan(ang)-(zSenStrip/2)/TMath::Cos(ang);
315 last = StripWidth*TMath::Cos(ang)/2;
318 } while (zpos-(StripWidth/2)*TMath::Cos(ang)>-t+zFLT1+7);
322 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
323 Offset = StripWidth*TMath::Cos(ang)/2.;
327 ycoor= -29./2.+Space+Gap/2;
330 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
332 AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang,270.);
334 zcoor = zpos+(zFLT1/2+zFLT2+zFLT3/2+7.*2.);
335 gMC->Gspos("FSTR",i, "FLT1", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
337 zpos = zpos - zSenStrip/TMath::Cos(ang);
338 last = StripWidth*TMath::Cos(ang)/2.;
339 } while (zpos>-t+7.+last);
341 printf("#######################################################\n");
342 printf(" Distance from the bound of the FLT3: %f cm \n", t+zpos-(zSenStrip/2)/TMath::Cos(ang));
343 ang = atan(zpos/sqrt(2*t*t-zpos*zpos));
344 zpos = zpos - zSenStrip/TMath::Cos(ang);
345 printf("NEXT Distance from the bound of the FLT3: %f cm \n", t+zpos-(zSenStrip/2)/TMath::Cos(ang));
346 printf("#######################################################\n");
348 ////////// Layers after detector /////////////////
350 // Honeycomb layer after (3cm)
352 Float_t OverSpace = Space + 7.3;
353 /// StripWidth*TMath::Sin(ang) + 1.3;
358 ycoor = -yFLT/2 + OverSpace + par[1];
359 gMC->Gsvolu("FPE1", "BOX ", idtmed[503], par, 3); // Hony
360 gMC->Gspos("FPE1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
361 gMC->Gsvolu("FPE2", "BOX ", idtmed[503], par, 3); // Hony
362 gMC->Gspos("FPE2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
363 gMC->Gsvolu("FPE3", "BOX ", idtmed[503], par, 3); // Hony
364 gMC->Gspos("FPE3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
366 // Electronics (Cu) after
369 par[1] = 1.43*0.05 / 2.; // 5% of X0
372 gMC->Gsvolu("FEC1", "BOX ", idtmed[501], par, 3); // Cu
373 gMC->Gspos("FEC1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
374 gMC->Gsvolu("FEC2", "BOX ", idtmed[501], par, 3); // Cu
375 gMC->Gspos("FEC2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
376 gMC->Gsvolu("FEC3", "BOX ", idtmed[501], par, 3); // Cu
377 gMC->Gspos("FEC3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
379 // Cooling water after
382 par[1] = 36.1*0.02 / 2.; // 2% of X0
385 gMC->Gsvolu("FWA1", "BOX ", idtmed[515], par, 3); // Water
386 gMC->Gspos("FWA1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
387 gMC->Gsvolu("FWA2", "BOX ", idtmed[515], par, 3); // Water
388 gMC->Gspos("FWA2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
389 gMC->Gsvolu("FWA3", "BOX ", idtmed[515], par, 3); // Water
390 gMC->Gspos("FWA3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
392 //back plate honycomb (2cm)
396 ycoor = yFLT/2 - par[1];
397 gMC->Gsvolu("FEG1", "BOX ", idtmed[503], par, 3); // Hony
398 gMC->Gspos("FEG1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
399 gMC->Gsvolu("FEG2", "BOX ", idtmed[503], par, 3); // Hony
400 gMC->Gspos("FEG2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
401 gMC->Gsvolu("FEG3", "BOX ", idtmed[503], par, 3); // Hony
402 gMC->Gspos("FEG3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
405 //_____________________________________________________________________________
406 void AliTOFv0::DrawModule()
409 // Draw a shaded view of the Time Of Flight version 1
411 // Set everything unseen
412 gMC->Gsatt("*", "seen", -1);
414 // Set ALIC mother transparent
415 gMC->Gsatt("ALIC","SEEN",0);
417 // Set the volumes visible
418 gMC->Gsatt("ALIC","SEEN",0);
419 gMC->Gsatt("FBAR","SEEN",1);
420 gMC->Gsatt("FTO1","SEEN",1);
421 gMC->Gsatt("FTO2","SEEN",1);
422 gMC->Gsatt("FTO3","SEEN",1);
423 gMC->Gsatt("FBT1","SEEN",1);
424 gMC->Gsatt("FBT2","SEEN",1);
425 gMC->Gsatt("FBT3","SEEN",1);
426 gMC->Gsatt("FDT1","SEEN",1);
427 gMC->Gsatt("FDT2","SEEN",1);
428 gMC->Gsatt("FDT3","SEEN",1);
429 gMC->Gsatt("FLT1","SEEN",1);
430 gMC->Gsatt("FLT2","SEEN",1);
431 gMC->Gsatt("FLT3","SEEN",1);
432 gMC->Gsatt("FPL1","SEEN",1);
433 gMC->Gsatt("FPL2","SEEN",1);
434 gMC->Gsatt("FPL3","SEEN",1);
435 gMC->Gsatt("FLD1","SEEN",1);
436 gMC->Gsatt("FLD2","SEEN",1);
437 gMC->Gsatt("FLD3","SEEN",1);
438 gMC->Gsatt("FLZ1","SEEN",1);
439 gMC->Gsatt("FLZ2","SEEN",1);
440 gMC->Gsatt("FLZ3","SEEN",1);
441 gMC->Gsatt("FLX1","SEEN",1);
442 gMC->Gsatt("FLX2","SEEN",1);
443 gMC->Gsatt("FLX3","SEEN",1);
444 gMC->Gsatt("FPA0","SEEN",1);
446 gMC->Gdopt("hide", "on");
447 gMC->Gdopt("shad", "on");
448 gMC->Gsatt("*", "fill", 7);
449 gMC->SetClipBox(".");
450 gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
452 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
453 gMC->Gdhead(1111, "Time Of Flight");
454 gMC->Gdman(18, 4, "MAN");
455 gMC->Gdopt("hide","off");
458 //_____________________________________________________________________________
459 void AliTOFv0::CreateMaterials()
462 // Define materials for the Time Of Flight
464 AliTOF::CreateMaterials();
467 //_____________________________________________________________________________
468 void AliTOFv0::Init()
471 // Initialise the detector after the geometry has been defined
474 fIdFTO2=gMC->VolId("FTO2");
475 fIdFTO3=gMC->VolId("FTO3");
476 fIdFLT1=gMC->VolId("FLT1");
477 fIdFLT2=gMC->VolId("FLT2");
478 fIdFLT3=gMC->VolId("FLT3");
481 //_____________________________________________________________________________
482 void AliTOFv0::StepManager()
485 // Procedure called at each step in the Time Of Flight
487 TLorentzVector mom, pos;
491 Int_t *idtmed = fIdtmed->GetArray()-499;
492 if(gMC->GetMedium()==idtmed[514-1] &&
493 gMC->IsTrackEntering() && gMC->TrackCharge()
494 && gMC->CurrentVolID(copy)==fIdSens) {
495 TClonesArray &lhits = *fHits;
497 // Record only charged tracks at entrance
498 gMC->CurrentVolOffID(1,copy);
500 gMC->CurrentVolOffID(3,copy);
502 id=gMC->CurrentVolOffID(8,copy);
506 id=gMC->CurrentVolOffID(5,copy);
507 if(id==fIdFLT3) vol[1]+=6;
508 } else if (id==fIdFTO2) {
510 id=gMC->CurrentVolOffID(5,copy);
511 if(id==fIdFLT2) vol[1]+=8;
513 id=gMC->CurrentVolOffID(5,copy);
514 if(id==fIdFLT1) vol[1]+=14;
516 gMC->TrackPosition(pos);
517 gMC->TrackMomentum(mom);
519 Double_t ptot=mom.Rho();
520 Double_t norm=1/ptot;
523 hits[i+3]=mom[i]*norm;
527 new(lhits[fNhits++]) AliTOFhit(fIshunt,gAlice->CurrentTrack(),vol,hits);