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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | #include <Riostream.h> | |
16 | #include <TMath.h> | |
17 | #include <TGeoManager.h> | |
18 | #include <TGeoVolume.h> | |
19 | #include <TGeoBBox.h> | |
20 | #include "AliITSsegmentationSDD.h" | |
21 | #include "AliITSDriftSpeedSDD.h" | |
22 | ||
23 | ///////////////////////////////////////////////////////////////////////////// | |
24 | // Segmentation class for drift detectors // | |
25 | // // | |
26 | // microcables microcables // | |
27 | // /\ /\ // | |
28 | // || || // | |
29 | // || || // | |
30 | // || || // | |
31 | // 0 256 0 // | |
32 | // 0 |----------------------|---------------------| 511 // | |
33 | // | time-bins | time-bins | // | |
34 | // | a | a | // | |
35 | // | n | n | // | |
36 | // X <_|_o____________________|___________________o_|__ // | |
37 | // | d | d | // | |
38 | // | e LEFT SIDE | RIGHT SIDE e | // | |
39 | // | s CHANNEL 0 | CHANNEL 1 s | // | |
40 | // | Xlocal > 0 | Xlocal < 0 | // | |
41 | // 255 |----------------------|---------------------| 256 // | |
42 | // | // | |
43 | // | // | |
44 | // V // | |
45 | // Z // | |
46 | ///////////////////////////////////////////////////////////////////////////// | |
47 | ||
48 | /* $Id$ */ | |
49 | ||
50 | const Float_t AliITSsegmentationSDD::fgkDxDefault = 35085.; | |
51 | const Float_t AliITSsegmentationSDD::fgkDzDefault = 75264.; | |
52 | const Float_t AliITSsegmentationSDD::fgkDyDefault = 300.; | |
53 | const Float_t AliITSsegmentationSDD::fgkPitchDefault = 294.; | |
54 | const Float_t AliITSsegmentationSDD::fgkClockDefault = 40.; | |
55 | const Int_t AliITSsegmentationSDD::fgkHalfNanodesDefault = 256; | |
56 | const Int_t AliITSsegmentationSDD::fgkNsamplesDefault = 256; | |
57 | const Int_t AliITSsegmentationSDD::fgkNchipsPerHybrid = 4; | |
58 | const Int_t AliITSsegmentationSDD::fgkNanodesPerChip = 64; | |
59 | const Float_t AliITSsegmentationSDD::fgkCm2Micron = 10000.; | |
60 | const Float_t AliITSsegmentationSDD::fgkMicron2Cm = 1.0E-04; | |
61 | ClassImp(AliITSsegmentationSDD) | |
62 | ||
63 | //______________________________________________________________________ | |
64 | AliITSsegmentationSDD::AliITSsegmentationSDD(Option_t *opt) : AliITSsegmentation(), | |
65 | fNsamples(0), | |
66 | fNanodes(0), | |
67 | fPitch(0), | |
68 | fTimeStep(0), | |
69 | fDriftSpeed(0), | |
70 | fSetDriftSpeed(0){ | |
71 | // Default constructor | |
72 | Init(); | |
73 | if(strstr(opt,"TGeo")){ | |
74 | if(!gGeoManager){ | |
75 | AliError("Geometry is not initialized\n"); | |
76 | return; | |
77 | } | |
78 | TGeoVolume *v=NULL; | |
79 | v = gGeoManager->GetVolume("ITSsddSensitivL3"); | |
80 | if(!v){ | |
81 | AliWarning("TGeo volume ITSsddSensitivL3 not found (hint: use v11Hybrid geometry)\n Using hardwired default values"); | |
82 | } | |
83 | else { | |
84 | TGeoBBox *s=(TGeoBBox*)v->GetShape(); | |
85 | SetDetSize(s->GetDX()*10000.,s->GetDZ()*20000.,s->GetDY()*20000.); | |
86 | } | |
87 | } | |
88 | } | |
89 | ||
90 | //______________________________________________________________________ | |
91 | void AliITSsegmentationSDD::Copy(TObject &obj) const { | |
92 | // protected method. copy this to obj | |
93 | AliITSsegmentation::Copy(obj); | |
94 | ((AliITSsegmentationSDD& ) obj).fNsamples = fNsamples; | |
95 | ((AliITSsegmentationSDD& ) obj).fNanodes = fNanodes; | |
96 | ((AliITSsegmentationSDD& ) obj).fPitch = fPitch; | |
97 | ((AliITSsegmentationSDD& ) obj).fTimeStep = fTimeStep; | |
98 | ((AliITSsegmentationSDD& ) obj).fDriftSpeed = fDriftSpeed; | |
99 | ((AliITSsegmentationSDD& ) obj).fSetDriftSpeed = fSetDriftSpeed; | |
100 | } | |
101 | ||
102 | //______________________________________________________________________ | |
103 | AliITSsegmentationSDD& AliITSsegmentationSDD::operator=(const AliITSsegmentationSDD &source){ | |
104 | // = operator | |
105 | if(this==&source) return *this; | |
106 | source.Copy(*this); | |
107 | return *this; | |
108 | } | |
109 | ||
110 | //____________________________________________________________________________ | |
111 | AliITSsegmentationSDD::AliITSsegmentationSDD(const AliITSsegmentationSDD &source) : | |
112 | AliITSsegmentation(source), | |
113 | fNsamples(0), | |
114 | fNanodes(0), | |
115 | fPitch(0), | |
116 | fTimeStep(0), | |
117 | fDriftSpeed(0), | |
118 | fSetDriftSpeed(0){ | |
119 | // copy constructor | |
120 | source.Copy(*this); | |
121 | } | |
122 | ||
123 | //---------------------------------------------------------------------- | |
124 | void AliITSsegmentationSDD::Init(){ | |
125 | // Standard initilisation routine | |
126 | fDriftSpeed=AliITSDriftSpeedSDD::DefaultDriftSpeed(); | |
127 | fCorr=0; | |
128 | SetDetSize(fgkDxDefault,fgkDzDefault,fgkDyDefault); | |
129 | SetPadSize(fgkPitchDefault,fgkClockDefault); | |
130 | SetNPads(fgkHalfNanodesDefault,fgkNsamplesDefault); | |
131 | } | |
132 | ||
133 | //---------------------------------------------------------------------- | |
134 | void AliITSsegmentationSDD:: | |
135 | Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const { | |
136 | // returns neighbours for use in Cluster Finder routines and the like | |
137 | ||
138 | if(iX >= fNanodes) printf("iX > fNanodes %d %d\n",iX,fNanodes); | |
139 | if(iZ >= fNsamples) printf("iZ > fNsamples %d %d\n",iZ,fNsamples); | |
140 | *Nlist=4; | |
141 | Xlist[0]=Xlist[1]=iX; | |
142 | if(iX && (iX != fNanodes/2)) Xlist[2]=iX-1; | |
143 | else Xlist[2]=iX; | |
144 | if ((iX !=fNanodes/2 -1) && (iX != fNanodes)) Xlist[3]=iX+1; | |
145 | else Xlist[3]=iX; | |
146 | if(iZ) Zlist[0]=iZ-1; | |
147 | else Zlist[0]=iZ; | |
148 | if (iZ < fNsamples) Zlist[1]=iZ+1; | |
149 | else Zlist[1]=iZ; | |
150 | Zlist[2]=Zlist[3]=iZ; | |
151 | } | |
152 | //---------------------------------------------------------------------- | |
153 | Float_t AliITSsegmentationSDD::GetAnodeFromLocal(Float_t xloc,Float_t zloc) const { | |
154 | // returns anode coordinate (as float) starting from local coordinates | |
155 | Float_t xAnode=zloc*fgkCm2Micron/fPitch; | |
156 | if(xloc>0){ // left side (anodes 0-255, anode 0 at zloc<0) | |
157 | xAnode+=(Float_t)fNanodes/4; | |
158 | }else{ // right side (anodes 256-511, anode 0 at zloc>0) | |
159 | xAnode=3*fNanodes/4-xAnode; | |
160 | } | |
161 | return xAnode; | |
162 | } | |
163 | ||
164 | //---------------------------------------------------------------------- | |
165 | Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Int_t nAnode) const{ | |
166 | // returns local Z coordinate from anode number (integer) | |
167 | Float_t zAnode=(Float_t)nAnode+0.5; | |
168 | return GetLocalZFromAnode(zAnode); | |
169 | } | |
170 | ||
171 | //---------------------------------------------------------------------- | |
172 | Float_t AliITSsegmentationSDD::GetLocalZFromAnode(Float_t zAnode) const{ | |
173 | // returns local Z coordinate from anode number (float) | |
174 | Float_t zloc=0.; | |
175 | if(zAnode<fNanodes/2){ // left side | |
176 | zloc=(zAnode*fPitch-fDz/2)*fgkMicron2Cm; | |
177 | }else{ // right side | |
178 | zAnode-=fNanodes/2; | |
179 | zloc=-(zAnode*fPitch-fDz/2)*fgkMicron2Cm; | |
180 | } | |
181 | return zloc; | |
182 | } | |
183 | //---------------------------------------------------------------------- | |
184 | Int_t AliITSsegmentationSDD::GetChipFromChannel(Int_t ix, Int_t iz) const { | |
185 | // returns chip number (in range 0-7) starting from channel number | |
186 | if(iz>=fNanodes || iz<0 || ix>fNsamples){ | |
187 | AliError("Bad cell number"); | |
188 | return -1; | |
189 | } | |
190 | Int_t theChip=iz/fgkNanodesPerChip; | |
191 | return theChip; | |
192 | } | |
193 | //---------------------------------------------------------------------- | |
194 | Int_t AliITSsegmentationSDD::GetChipFromLocal(Float_t xloc, Float_t zloc) const { | |
195 | // returns chip number (in range 0-7) starting from local coordinates | |
196 | Float_t detsize=fDz*fgkMicron2Cm; | |
197 | Float_t chipsize=detsize/(Float_t)fgkNchipsPerHybrid; | |
198 | zloc+=detsize/2.; | |
199 | if(zloc<-0.01 || zloc>detsize+0.01){ // 100 micron tolerance around edges | |
200 | AliError("Z local value out of sensitive SDD area"); | |
201 | return -1; | |
202 | } | |
203 | Int_t iChip=int(zloc/chipsize); | |
204 | if(zloc<0.) iChip=0; | |
205 | if(zloc>=detsize) iChip=fgkNchipsPerHybrid-1; | |
206 | if(iChip>=fgkNchipsPerHybrid || iChip<0){ | |
207 | AliError(Form("Bad chip number %d",iChip)); | |
208 | return -1; | |
209 | } | |
210 | Int_t iSide=GetSideFromLocalX(xloc); | |
211 | if(iSide==1) iChip=fgkNchipsPerHybrid-iChip+3; // i.e. 7-iChip | |
212 | return iChip; | |
213 | } | |
214 | //---------------------------------------------------------------------- | |
215 | Int_t AliITSsegmentationSDD::GetChipsInLocalWindow(Int_t* array, Float_t zmin, Float_t zmax, Float_t xmin, Float_t xmax) const { | |
216 | // returns the numbers of the chips that read channels in a given region | |
217 | // of the module defined in local coordinates by zmin-zmax, xmin-max | |
218 | ||
219 | Int_t nChipInW = 0; | |
220 | Float_t zminDet=-fDz*fgkMicron2Cm/2.; | |
221 | Float_t zmaxDet=fDz*fgkMicron2Cm/2.; | |
222 | if(zmin<zminDet) zmin=zminDet; | |
223 | if(zmax>zmaxDet) zmax=zmaxDet; | |
224 | Float_t xminDet=-fDx*fgkMicron2Cm; | |
225 | Float_t xmaxDet=fDx*fgkMicron2Cm; | |
226 | if(xmin<xminDet) xmin=xminDet; | |
227 | if(xmax>xmaxDet) xmax=xmaxDet; | |
228 | Int_t n1=GetChipFromLocal(xmin,zmin); | |
229 | array[nChipInW]=n1; | |
230 | nChipInW++; | |
231 | Int_t n2=GetChipFromLocal(xmin,zmax); | |
232 | if(n2!=n1){ | |
233 | Int_t imin=TMath::Min(n1,n2); | |
234 | Int_t imax=TMath::Max(n1,n2); | |
235 | for(Int_t ichip=imin; ichip<=imax; ichip++){ | |
236 | if(ichip==n1) continue; | |
237 | array[nChipInW]=ichip; | |
238 | nChipInW++; | |
239 | } | |
240 | } | |
241 | Int_t n3=GetChipFromLocal(xmax,zmin); | |
242 | if(n3!=n1){ | |
243 | array[nChipInW]=n3; | |
244 | nChipInW++; | |
245 | Int_t n4=GetChipFromLocal(xmax,zmax); | |
246 | if(n4!=n3){ | |
247 | Int_t imin=TMath::Min(n3,n4); | |
248 | Int_t imax=TMath::Max(n3,n4); | |
249 | for(Int_t ichip=imin; ichip<=imax; ichip++){ | |
250 | if(ichip==n3) continue; | |
251 | array[nChipInW]=ichip; | |
252 | nChipInW++; | |
253 | } | |
254 | } | |
255 | } | |
256 | return nChipInW; | |
257 | } | |
258 | //---------------------------------------------------------------------- | |
259 | void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z, | |
260 | Int_t &timebin,Int_t &anode) const { | |
261 | // Returns cell coordinates (time sample,anode) | |
262 | // for given real local coordinates (x,z) | |
263 | ||
264 | // expects x, z in cm | |
265 | ||
266 | Float_t driftpath=fDx-TMath::Abs(x*fgkCm2Micron); | |
267 | timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep); | |
268 | anode=(Int_t)GetAnodeFromLocal(x,z); | |
269 | if(!fSetDriftSpeed){ | |
270 | timebin=-999; | |
271 | AliWarning("Drift speed not set: timebin is dummy"); | |
272 | } | |
273 | ||
274 | } | |
275 | //---------------------------------------------------------------------- | |
276 | void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode, | |
277 | Float_t &x ,Float_t &z) const{ | |
278 | // Transform from cell to real local coordinates | |
279 | // returns x, z in cm | |
280 | ||
281 | // the +0.5 means that an # and time bin # should start from 0 !!! | |
282 | // the +0.5 means that an # and time bin # should start from 0 !!! | |
283 | ||
284 | Float_t driftpath=GetDriftTimeFromTb(timebin)*fDriftSpeed; | |
285 | if (anode < fNanodes/2){ // left side, positive x | |
286 | x=(fDx-driftpath)*fgkMicron2Cm; | |
287 | }else{ // right side, negative x | |
288 | x = -(fDx-driftpath)*fgkMicron2Cm; | |
289 | } | |
290 | z=GetLocalZFromAnode(anode); | |
291 | if(!fSetDriftSpeed){ | |
292 | x=-9999.; | |
293 | AliWarning("Drift speed not set: x coord. is dummy"); | |
294 | } | |
295 | } | |
296 | //---------------------------------------------------------------------- | |
297 | void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z) const{ | |
298 | // Get anode and time bucket as floats - numbering from 0 | |
299 | ||
300 | // expects x, z in cm | |
301 | ||
302 | Float_t xloc=x; | |
303 | Float_t zloc=z; | |
304 | Float_t driftpath=fDx-TMath::Abs(fgkCm2Micron*xloc); | |
305 | x=driftpath/fDriftSpeed/fTimeStep; | |
306 | if (xloc < 0) x = -x; | |
307 | z=GetAnodeFromLocal(xloc,zloc); | |
308 | if(!fSetDriftSpeed){ | |
309 | x=-9999.; | |
310 | AliWarning("Drift speed not set: x coord. is dummy"); | |
311 | } | |
312 | } | |
313 | //---------------------------------------------------------------------- | |
314 | void AliITSsegmentationSDD::Print(Option_t *opt) const { | |
315 | // Print SDD segmentation Parameters | |
316 | ||
317 | cout << "**************************************************" << endl; | |
318 | cout << " Silicon Drift Detector Segmentation Parameters " << opt << endl; | |
319 | cout << "**************************************************" << endl; | |
320 | cout << "Number of Time Samples: " << fNsamples << endl; | |
321 | cout << "Number of Anodes: " << fNanodes << endl; | |
322 | cout << "Time Step (ns): " << fTimeStep << endl; | |
323 | cout << "Anode Pitch (um): " << fPitch << endl; | |
324 | cout << "Full Detector Width (x): " << fDx; | |
325 | cout<<" (Default is "<<fgkDxDefault<<") "<<endl; | |
326 | cout << "Half Detector Length (z): " << fDz; | |
327 | cout<<" (Default is "<<fgkDzDefault<<") "<<endl; | |
328 | cout << "Full Detector Thickness (y): " << fDy; | |
329 | cout<<" (Default is "<<fgkDyDefault<<") "<<endl; | |
330 | cout << "**************************************************" << endl; | |
331 | ||
332 | } | |
333 | ||
334 | //---------------------------------------------------------------------- | |
335 | void AliITSsegmentationSDD::PrintDefaultParameters() const { | |
336 | // print SDD parameters defined as static const data members | |
337 | ||
338 | cout << "**************************************************" << endl; | |
339 | cout << " Silicon Drift Detector Segmentation Parameters " << endl; | |
340 | cout << " Default values defined as static const data members"<< endl; | |
341 | cout << " Actual values can be set with the relevant setters"<< endl; | |
342 | cout << "**************************************************" << endl; | |
343 | cout<<"fgkDxDefault = "<<fgkDxDefault<<endl; | |
344 | cout<<"fgkDzDefault = "<<fgkDzDefault<<endl; | |
345 | cout<<"fgkDyDefault = "<<fgkDyDefault<<endl; | |
346 | cout<<"fgkPitchDefault = "<<fgkPitchDefault<<endl; | |
347 | cout<<"fgkClockDefault = "<<fgkClockDefault<<endl; | |
348 | cout<<"fgkHalfNanodesDefault = "<<fgkHalfNanodesDefault<<endl; | |
349 | cout<<"fgkNsamplesDefault = "<<fgkNsamplesDefault<<endl; | |
350 | cout << "**************************************************" << endl; | |
351 | ||
352 | } | |
353 | ||
354 | //______________________________________________________________________ | |
355 | Bool_t AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z, | |
356 | Int_t &ix,Int_t &iz) const { | |
357 | // Transformation from Geant detector centered local coordinates (cm) to | |
358 | // time bucket numbers ix and anode number iz. | |
359 | // Input: | |
360 | // Float_t x detector local coordinate x in cm with respect to the | |
361 | // center of the sensitive volume. | |
362 | // Float_t z detector local coordinate z in cm with respect to the | |
363 | // center of the sensitive volulme. | |
364 | // Output: | |
365 | // Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples. | |
366 | // Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes. | |
367 | // A value of -1 for ix or iz indecates that this point is outside of the | |
368 | // detector segmentation as defined. | |
369 | ||
370 | Float_t dx,dz; | |
371 | ||
372 | ix = -1; // default values | |
373 | iz = -1; // default values | |
374 | dx = -fgkMicron2Cm*Dx(); // lower left edge in cm. | |
375 | dz = -0.5*fgkMicron2Cm*Dz(); // lower left edge in cm. | |
376 | if(x<dx || x>-dx) { | |
377 | AliWarning(Form("Input argument %f out of range (%f, %f)",x,dx,-dx)); | |
378 | return kFALSE; // outside of defined volume. | |
379 | } | |
380 | if(z<dz || z>-dz) { | |
381 | AliWarning(Form("Input argument %f out of range (%f, %f)",z,dz,-dz)); | |
382 | return kFALSE; // outside of defined volume. | |
383 | } | |
384 | GetPadIxz(x,z,ix,iz); | |
385 | if(!fSetDriftSpeed){ | |
386 | ix=-999; | |
387 | AliWarning("Drift speed not set: timebin is dummy"); | |
388 | return kFALSE; | |
389 | } | |
390 | return kTRUE; // Found ix and iz, return. | |
391 | } | |
392 | //______________________________________________________________________ | |
393 | void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const | |
394 | { | |
395 | // Transformation from Detector time bucket and anode coordiantes to Geant | |
396 | // detector centerd local coordinates (cm). | |
397 | // Input: | |
398 | // Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples. | |
399 | // Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes. | |
400 | // Output: | |
401 | // Float_t x detector local coordinate x in cm with respect to the | |
402 | // center of the sensitive volume. | |
403 | // Float_t z detector local coordinate z in cm with respect to the | |
404 | // center of the sensitive volulme. | |
405 | // If ix and or iz is outside of the segmentation range a value of -Dx() | |
406 | // or -0.5*Dz() is returned. | |
407 | ||
408 | x=-Dx(); | |
409 | z=-0.5*Dz(); | |
410 | if(ix<0 || ix>=Npx()) { | |
411 | AliWarning(Form("Input argument %d out of range (0, %d)",ix,Npx())); | |
412 | return; // outside of detector | |
413 | } | |
414 | if(iz<0 || iz>=Npz()) { | |
415 | AliWarning(Form("Input argument %d out of range (0, %d)",iz,Npz())); | |
416 | return; // outside of detctor | |
417 | } | |
418 | GetPadCxz(ix,iz,x,z); | |
419 | if(!fSetDriftSpeed){ | |
420 | x=-9999.; | |
421 | AliWarning("Drift speed not set: x coord. is dummy"); | |
422 | } | |
423 | return; // Found x and z, return. | |
424 | } |