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 ///////////////////////////////////////////////////////////////////////////////
20 // ALICE Cosmic Ray Trigger //
22 // This class contains the functions for version 0 of the ALICE Cosmic Ray //
23 // Trigger. This version will be used to simulation comic rays in alice //
24 // with all the detectors. //
28 // Arturo Fernandez <afernand@fcfm.buap.mx>
29 // Enrique Gamez <egamez@fcfm.buap.mx>
31 // Universidad Autonoma de Puebla
36 <img src="picts/AliCRTv0Class.gif">
39 <p>The responsible person for this module is
40 <a href="mailto:egamez@fcfm.buap.mx">Enrique Gamez</a>.
46 ///////////////////////////////////////////////////////////////////////////////
48 #include <Riostream.h>
51 #include <TGeometry.h>
52 #include <TLorentzVector.h>
54 #include <TVirtualMC.h>
56 #include "AliCRTConstants.h"
65 //_____________________________________________________________________________
66 AliCRTv0::AliCRTv0() : AliCRT()
69 // Default constructor for CRT v0
73 //_____________________________________________________________________________
74 AliCRTv0::AliCRTv0(const char *name, const char *title)
78 // Standard constructor for CRT v0
82 <img src="picts/AliCRTv0.gif">
87 //_____________________________________________________________________________
88 AliCRTv0::AliCRTv0(const AliCRTv0& crt)
96 //_____________________________________________________________________________
97 AliCRTv0& AliCRTv0::operator= (const AliCRTv0& crt)
100 // Asingment operator.
106 //_____________________________________________________________________________
107 void AliCRTv0::BuildGeometry()
110 // Create the ROOT TNode geometry for the CRT
115 const Int_t kColorCRT = kRed;
117 // Find the top node alice.
118 top = gAlice->GetGeometry()->GetNode("alice");
120 new TBRIK("S_CRT_A", "CRT box", "void",
121 AliCRTConstants::fgActiveAreaLenght/2.,
122 AliCRTConstants::fgActiveAreaHeight/2.,
123 AliCRTConstants::fgActiveAreaWidth/2.);
126 new TRotMatrix("Left", "Left", 90., 315., 90., 45., 0., 337.5);
127 new TRotMatrix("Right", "Right", 90., 45., 90., 315., 180., 202.5);
128 new TRotMatrix("Up", "Up", 90., 0., 90., 90., 0., 90.);
132 // Put 4 modules on the top of the magnet
133 Float_t box = AliCRTConstants::fgCageWidth/2.;
135 node = new TNode("upper1", "upper1", "S_CRT_A", 0., 790., 3.*box, "Up");
136 node->SetLineColor(kColorCRT);
140 node = new TNode("upper2", "upper2", "S_CRT_A", 0., 790., box, "Up");
141 node->SetLineColor(kColorCRT);
145 node = new TNode("upper3", "upper3", "S_CRT_A", 0., 790., -1.*box, "Up");
146 node->SetLineColor(kColorCRT);
150 node = new TNode("upper4", "upper4", "S_CRT_A", 0., 790., -3.*box, "Up");
151 node->SetLineColor(kColorCRT);
155 // Modules on the left side.
156 Float_t xtragap = 10.;
157 Float_t initXside = (790.+xtragap)*TMath::Sin(2*22.5*kDegrad); //rigth side
158 Float_t initYside = (790.+xtragap)*TMath::Cos(2*22.5*kDegrad);
160 node = new TNode("upper5", "upper5", "S_CRT_A", initXside, initYside, 3.*box, "Left");
161 node->SetLineColor(kColorCRT);
165 node = new TNode("upper6", "upper6", "S_CRT_A", initXside, initYside, box, "Left");
166 node->SetLineColor(kColorCRT);
170 node = new TNode("upper7", "upper7", "S_CRT_A", initXside, initYside, -1.*box, "Left");
171 node->SetLineColor(kColorCRT);
175 node = new TNode("upper8", "upper8", "S_CRT_A", initXside, initYside, -3.*box, "Left");
176 node->SetLineColor(kColorCRT);
180 // Modules on the right side.
182 node = new TNode("upper9", "upper9", "S_CRT_A", -initXside, initYside, 3.*box, "Right");
183 node->SetLineColor(kColorCRT);
187 node = new TNode("upper10", "upper10", "S_CRT_A", -initXside, initYside, box, "Right");
188 node->SetLineColor(kColorCRT);
192 node = new TNode("upper11","upper11", "S_CRT_A", -initXside, initYside, -1.*box, "Right");
193 node->SetLineColor(kColorCRT);
197 node = new TNode("upper12","upper12", "S_CRT_A", -initXside, initYside, -3.*box, "Right");
198 node->SetLineColor(kColorCRT);
204 //_____________________________________________________________________________
205 void AliCRTv0::CreateGeometry()
208 // Create geometry for the CRT array
210 Int_t idrotm[2499]; // The rotation matrix.
212 Int_t * idtmed = fIdtmed->GetArray() - 1099 ;
222 box[0] = AliCRTConstants::fgCageLenght/2.; // Half Length of the box along the X axis, cm.
223 box[1] = AliCRTConstants::fgCageHeight/2.; // Half Length of the box along the Y axis, cm.
224 box[2] = AliCRTConstants::fgCageWidth/2.; // Half Length of the box along the Z axis, cm.
227 // Define the Scintillators. as a big box.
229 scint[0] = AliCRTConstants::fgActiveAreaLenght/2.; // Half Length in X
230 scint[1] = AliCRTConstants::fgActiveAreaHeight/2.; // Half Length in Y
231 scint[2] = AliCRTConstants::fgActiveAreaWidth/2.; // Half Length in Z
232 gMC->Gsvolu("CRT1", "BOX ", idtmed[1112], scint, 3); // Scintillators
235 // Define the coordinates where the draw will begin.
240 // we'll start dawing from the center.
245 Float_t gapY = 30.; // 30 cms. above the barrel.
246 // For the height we staimate the from the center of the ceiling,
247 // if were a cilinder, must be about 280cm.
248 Float_t barrel = 790.; // Barrel radius.
249 Float_t height = barrel + gapY - 30.;
250 Float_t initY = height;
254 // we'll start dawing from the center.
257 // Put 4 modules on the top of the magnet
259 for ( Int_t i = 1 ; i <= 4 ; i++ ) {
260 gMC->Gspos("CRT1", i, "ALIC", initX, initY, (i-step)*box[2], 0, "ONLY");
264 // Modules on the barrel sides.
265 // Because the openenig angle for each face is 22.5, and if we want to
266 // put the modules right in the middle
267 Float_t xtragap = 10.;
268 Float_t initXside = (height+xtragap)*TMath::Sin(2*22.5*kDegrad); //rigth side
269 Float_t initYside = (height+xtragap)*TMath::Cos(2*22.5*kDegrad);
271 // Put 4 modules on the left side of the magnet
272 // The rotation matrix parameters, for the left side.
273 AliMatrix(idrotm[232], 90., 315., 90., 45., 0., 337.5);
275 for ( Int_t i = 1 ; i <= 4 ; i++ ) {
276 gMC->Gspos("CRT1", i+4, "ALIC", initXside, initYside, (i-stepl)*box[2],
277 idrotm[232], "ONLY");
281 // Put 4 modules on the right side of the magnet
282 // The rotation matrix parameters for the right side.
283 AliMatrix(idrotm[231], 90., 45., 90., 315., 180., 202.5);
285 for ( Int_t i = 1 ; i <= 4 ; i++ ) {
286 gMC->Gspos("CRT1", i+8, "ALIC", -initXside, initYside, (i-stepr)*box[2],
287 idrotm[231], "ONLY");
291 // Divide the modules in 2 planes.
292 //gMC->Gsdvn("CRT2", "CRT1", 2, 2);
293 // Now divide each plane in 8 palettes
294 //gMC->Gsdvn("CRT3", "CRT2", 8, 3);
298 //_____________________________________________________________________________
299 void AliCRTv0::CreateMolasse()
301 Int_t idrotm[2499]; // The rotation matrix.
303 Int_t * idtmed = fIdtmed->GetArray() - 1099 ;
309 // Exactly above the hall
312 tspar[1] = 1170. + 375.;
313 tspar[2] = (1900.+1150.)/2.+100.;
316 gMC->Gsvolu("CMO1", "TUBS", idtmed[1123], tspar, 5);
317 gMC->Gspos("CMO1", 1, "ALIC", 0., 500., 1900.-tspar[2]+400., 0, "MANY");
321 tbox[1] = (4420. - 1670.)/2.;
322 tbox[2] = (1900.+1150.)/2. + 200.;
323 gMC->Gsvolu("CM12", "BOX", idtmed[1123], tbox, 3);
324 gMC->Gspos("CM12", 1, "ALIC", 0., 4420. -tbox[1], 1900.-tbox[2]+400., 0, "MANY");
326 AliMatrix(idrotm[2003], 0., 0., 90., 0., 90., 90.);
329 tube[0] = 455. + 100.;
330 tube[1] = 555. + 375.;
331 tube[2] = (5150. - 1166.)/2.;
332 gMC->Gsvolu("CMO2", "TUBE", idtmed[1123], tube, 3);
333 gMC->Gspos("CMO2", 1, "ALIC", -2100., 4420.-tube[2], 0., idrotm[2003], "MANY");
339 tube[2] = (5150. - 690.)/2.;
340 gMC->Gsvolu("CMO3", "TUBE", idtmed[1123], tube, 3);
341 gMC->Gspos("CMO3", 1, "ALIC", 375., 4420.-tube[2], 1900.+2987.7, idrotm[2003], "MANY");
342 // Behind the PGC2 up to the end of the M. volume.
344 tbox[1] = 2575. + 95.;
345 tbox[2] = (12073. - 1900.-2987.7-650.)/2.;
346 gMC->Gsvolu("CMO7", "BOX", idtmed[1123], tbox, 3);
347 gMC->Gspos("CMO7", 1, "ALIC", 0., 4420.-tbox[1], 1900.+2987.7+650.+tbox[2], 0, "MANY");
349 // Along the PX24 , upper part.
352 tube[2] = 2575. - 1300. + 95.;
353 gMC->Gsvolu("CMO4", "TUBE", idtmed[1123], tube, 3);
354 gMC->Gspos("CMO4", 1, "ALIC", 0., 404.+1300.+tube[2], -2300., idrotm[2003], "MANY");
356 // Along the PX24 , lower part
360 tspar[3] = kRaddeg*TMath::ASin(1070./1150.);
361 tspar[4] = 360. - tspar[3];
362 gMC->Gsvolu("CMO5", "TUBS", idtmed[1123], tspar, 5);
363 gMC->Gspos("CMO5", 1, "ALIC", 0., 404., -2300., idrotm[2003], "MANY");
366 tbox[1] = 2575. + 95.;
368 gMC->Gsvolu("CMO6", "BOX", idtmed[1123], tbox, 3);
369 gMC->Gspos("CMO6", 1, "ALIC", 0., 4420.-tbox[1], -3550.-tbox[2], 0, "MANY");
372 // On the right side of th hall
373 tbox[0] = (12073. - 1250.)/2.;
374 tbox[1] = 2575. + 95.;
375 tbox[2] = (8437.7+650.)/2.;
376 gMC->Gsvolu("CMO8", "BOX", idtmed[1123], tbox, 3);
377 gMC->Gspos("CMO8", 1, "ALIC", 1250.+tbox[0], 4420.-tbox[1], -3550.+tbox[2], 0, "MANY");
379 // on the left side of the hall, behind
380 tbox[0] = (12073. - 2755.)/2.;
381 tbox[1] = 2575. + 95.;
382 tbox[2] = (8437.7+650.)/2.;
383 gMC->Gsvolu("CMO9", "BOX", idtmed[1123], tbox, 3);
384 gMC->Gspos("CMO9", 1, "ALIC", -2755.-tbox[0], 4420.-tbox[1], -3550.+tbox[2], 0, "MANY");
387 // Molasse betwen the PX24 & PM25 on the left side.
388 tbox[0] = (2755. - 1250.)/2.;
389 tbox[1] = 2575. + 95.;
390 tbox[2] = (3550. - 555.)/2.;
391 gMC->Gsvolu("CM10", "BOX", idtmed[1123], tbox, 3);
392 gMC->Gspos("CM10", 1, "ALIC", -1250.-tbox[0], 4420.-tbox[1], -tbox[2]-555., 0, "MANY");
395 // Molasse betwen the PGC2 & PM25 on the left side.
396 tbox[0] = (2755. - 1250.)/2.;
397 tbox[1] = 2575. + 95.;
398 tbox[2] = (1900.+2987.7 - 555. + 650.)/2.;
399 gMC->Gsvolu("CM11", "BOX", idtmed[1123], tbox, 3);
400 gMC->Gspos("CM11", 1, "ALIC", -1250.-tbox[0], 4420.-tbox[1], 555.+tbox[2], 0, "MANY");
405 //_____________________________________________________________________________
406 void AliCRTv0::CreateShafts()
411 Int_t idrotm[2499]; // The rotation matrix.
413 Int_t * idtmed = fIdtmed->GetArray() - 1099 ;
422 gMC->Gsvolu("CHC1", "TUBS", idtmed[1116], ptubs, 5);
423 gMC->Gspos("CHC1", 1, "ALIC", 0., 500., 0., 0, "ONLY");
429 AliMatrix(idrotm[2001], 0., 0., 90., 0., 90., 90.);
435 ptubs[3] = kRaddeg*TMath::ASin(1070./ptubs[0]);
436 ptubs[4] = 360 - ptubs[3];
437 gMC->Gsvolu("CSF1", "TUBS", idtmed[1116], ptubs, 5);
438 gMC->Gspos("CSF1", 1, "ALIC", 0., 404., -2300., idrotm[2001], "MANY");
443 ptube[2] = 2575. - ptubs[2] + 95.;
444 gMC->Gsvolu("CSF2", "TUBE", idtmed[1116], ptube, 3);
445 gMC->Gspos("CSF2", 1, "ALIC", 0., 404.+ptubs[2]+ptube[2], -2300., idrotm[2001], "MANY");
447 // Concrete walls along the shaft
450 pbox[1] = 2575. + 95.;
452 gMC->Gsvolu("CSW1", "BOX", idtmed[1116], pbox, 3);
453 gMC->Gspos("CSW1", 1, "ALIC", -290-pbox[0], 404.-1300.+pbox[1], -3450.+210.*2, 0, "MANY");
457 pbox[1] = 2575. + 95.;
459 gMC->Gsvolu("CSW3", "BOX", idtmed[1116], pbox, 3);
460 gMC->Gspos("CSW3", 1, "ALIC", 420.-290.+pbox[0], 404.-1300.+pbox[1], -3450.+210.*2, 0, "MANY");
464 pbox[1] = 2575. + 95.;
466 gMC->Gsvolu("CSW2", "BOX", idtmed[1116], pbox, 3);
467 gMC->Gspos("CSW2", 1, "ALIC", -290-pbox[0], 404.-1300.+pbox[1], -3450.+pbox[2], 0, "MANY");
468 gMC->Gspos("CSW2", 2, "ALIC", 420.-290.+pbox[0], 404.-1300.+pbox[1], -3450.+pbox[2], 0, "MANY");
475 gMC->Gsvolu("CSP1", "BOX", idtmed[1116], pbox, 3);
476 gMC->Gspos("CSP1", 1, "ALIC", 0., 2600.-700., -1150-pbox[2], 0, "MANY");
482 gMC->Gsvolu("CSP2", "BOX", idtmed[1116], pbox, 3);
483 gMC->Gspos("CSP2", 1, "ALIC", 0., 2950.-700., -3450+pbox[2], 0, "MANY");
489 gMC->Gsvolu("CSP3", "BOX", idtmed[1116], pbox, 3);
490 gMC->Gspos("CSP3", 1, "ALIC", 0., 2950.-700., -1150.-210.-pbox[2], 0, "MANY");
496 gMC->Gsvolu("CSP4", "BOX", idtmed[1116], pbox, 3);
497 gMC->Gspos("CSP4", 1, "ALIC", 0., 2950.-700.+155.+pbox[1], -1150.-210.-pbox[2], 0, "MANY");
504 gMC->Gsvolu("CSP5", "BOX", idtmed[1116], pbox, 3);
505 gMC->Gspos("CSP5", 1, "ALIC", 0., 2950.-700., -3450.+460.+pbox[2], 0, "MANY");
511 gMC->Gsvolu("CSP6", "BOX", idtmed[1116], pbox, 3);
512 gMC->Gspos("CSP6", 1, "ALIC", 1150.-600., 2950.-700., -3450.+460.+pbox[2], 0, "MANY");
513 gMC->Gspos("CSP6", 2, "ALIC", -1150.+600., 2950.-700., -3450.+460.+pbox[2], 0, "MANY");
520 gMC->Gsvolu("CSP7", "BOX", idtmed[1116], pbox, 3);
521 gMC->Gspos("CSP7", 1, "ALIC", 850.+pbox[0], 2950.-700.+100., -3450.+460.+pbox[2], 0, "MANY");
522 gMC->Gspos("CSP7", 2, "ALIC", -850.-pbox[0], 2950.-700.+100., -3450.+460.+pbox[2], 0, "MANY");
527 ptube[1] = ptube[0] + 100.;
528 ptube[2] = (5150. - 1166.)/2.;
529 gMC->Gsvolu("CSF3", "TUBE", idtmed[1116], ptube, 3);
530 gMC->Gspos("CSF3", 1, "ALIC", -2100., AliCRTConstants::fgDepth-ptube[2], 0., idrotm[2001], "MANY");
534 ptube[1] = ptube[0] + 100.;
535 ptube[2] = (5150. - 690.)/2.;
536 gMC->Gsvolu("CSF4", "TUBE", idtmed[1116], ptube, 3);
537 gMC->Gspos("CSF4", 1, "ALIC", 375., AliCRTConstants::fgDepth-ptube[2], 1900.+2987.7, idrotm[2001], "MANY");
541 //_____________________________________________________________________________
543 void AliCRTv0::CreateMaterials()
545 // Use the standard materials.
546 AliCRT::CreateMaterials();
550 //_____________________________________________________________________________
551 void AliCRTv0::DrawDetector()
554 // Draw a shaded view of the L3 magnet
556 cout << "AliCRTv0::DrawModule() : Drawing the module" << endl;
558 gMC->Gsatt("*", "seen", -1);
559 gMC->Gsatt("alic", "seen", 0);
561 gMC->Gsatt("ALIC","seen",0);
562 gMC->Gsatt("L3MO","seen",1); // L3 Magnet
563 gMC->Gsatt("CRT1","seen",1); // Scintillators
565 // Draw the molasse volumes
566 gMC->Gsatt("CMO1","seen",0); // Exactly above the HALL
567 gMC->Gsatt("CMO2","seen",0); // Molasse, along the PM25
568 gMC->Gsatt("CMO3","seen",0); // molasse along the PGC2
569 gMC->Gsatt("CMO4","seen",0); // Molasse, behind the PX24 upper part
570 gMC->Gsatt("CMO5","seen",0); // molasse behind px24, lower part
571 gMC->Gsatt("CMO6","seen",0); // behind the PX24
572 gMC->Gsatt("CMO7","seen",0); // behind the PGC2
573 gMC->Gsatt("CMO8","seen",0); // on the right side.
574 gMC->Gsatt("CMO9","seen",0); // on the left side.
575 gMC->Gsatt("CM10","seen",0); // betwen PX24 & PM25.
576 gMC->Gsatt("CM11","seen",0); // betwen PGC2 & PM25.
577 gMC->Gsatt("CM12","seen",0); // box above the hall.
579 gMC->Gdopt("hide", "on");
580 gMC->Gdopt("edge","off");
581 gMC->Gdopt("shad", "on");
582 gMC->Gsatt("*", "fill", 7);
583 gMC->SetClipBox("ALIC", 0, 3000, -3000, 3000, -6000, 6000);
585 gMC->Gdraw("alic", 40, 30, 0, 10, 9.5, .009, .009);
586 gMC->Gdhead(1111, "View of CRT(ACORDE)");
587 gMC->Gdman(18, 4, "MAN");
592 //_____________________________________________________________________________
593 void AliCRTv0::Init()
596 // Initialise L3 magnet after it has been built
600 printf("\n%s: ",ClassName());
601 for(i=0;i<35;i++) printf("*");
602 printf(" CRTv0_INIT ");
603 for(i=0;i<35;i++) printf("*");
604 printf("\n%s: ",ClassName());
606 // Here the CRTv0 initialisation code (if any!)
607 for(i=0;i<80;i++) printf("*");
613 //_____________________________________________________________________________
614 void AliCRTv0::StepManager()
617 // Called for every step in the Cosmic Ray Trigger
625 static Float_t hits[14];
626 Int_t tracknumber = gAlice->CurrentTrack();
628 static Float_t eloss;
629 static Float_t tlength;
633 if ( !gMC->IsTrackAlive() ) return;
635 if (gMC->IsNewTrack()) {
636 // Reset the deposited energy
640 eloss += gMC->Edep(); // Store the energy loss along the trajectory.
641 tlength += gMC->TrackStep();
643 if (gMC->IsTrackEntering() && (strcmp(gMC->CurrentVolName(),"CM12") == 0) ) {
645 // Get current particle id (ipart), track position (pos) and momentum (mom)
646 gMC->TrackPosition(pos);
647 gMC->TrackMomentum(mom);
648 ipart = gMC->TrackPid();
650 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
651 Double_t pt = TMath::Sqrt(tc);
652 theta = Float_t(TMath::ATan2(pt,Double_t(mom[2])))*kRaddeg;
653 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
656 vol[0] = gMC->CurrentVolOffID(1, vol[1]);
657 vol[2] = gMC->CurrentVolID(copy);
660 hits[0] = 0.f; // (fnmou)
661 hits[1] = (Float_t)ipart; // (fId)
663 hits[2] = pos[0]; // X coordinate (fX)
664 hits[3] = pos[1]; // Y coordinate (fY)
665 hits[4] = pos[2]; // Z coordinate (fZ)
666 hits[5] = mom[0]; // Px (fpxug)
667 hits[6] = mom[1]; // Py (fpyug)
668 hits[7] = mom[2]; // Pz (fpzug)
670 hits[8] = gMC->GetMedium();//layer(flay)
671 hits[9] = theta; // arrival angle
673 hits[11] = eloss; // Energy loss
674 hits[12] = tlength; // Trajectory lenght
675 hits[13] = (Float_t)tracknumber;
677 AddHit(gAlice->CurrentTrack(),vol, hits);