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b0f5e3fc | 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 | **************************************************************************/ | |
04436464 | 15 | #include <iomanip.h> |
16 | #include <fstream.h> | |
1ca7869b | 17 | #include <TF1.h> |
b0f5e3fc | 18 | #include <TMath.h> |
19 | ||
b0f5e3fc | 20 | #include "AliITSsegmentationSDD.h" |
21 | #include "AliITS.h" | |
314ba410 | 22 | #include "AliITSgeom.h" |
d953664a | 23 | #include "AliITSgeomSDD.h" |
b0f5e3fc | 24 | #include "AliRun.h" |
314ba410 | 25 | #include "AliITSresponse.h" |
b0f5e3fc | 26 | |
b0f5e3fc | 27 | ClassImp(AliITSsegmentationSDD) |
2a4239d3 | 28 | //---------------------------------------------------------------------- |
29 | AliITSsegmentationSDD::AliITSsegmentationSDD(AliITSgeom* geom, | |
30 | AliITSresponse *resp){ | |
b0f5e3fc | 31 | // constructor |
32 | fGeom=geom; | |
03898a57 | 33 | fDriftSpeed=resp->DriftSpeed(); |
b0f5e3fc | 34 | fCorr=0; |
35 | SetDetSize(); | |
e8189707 | 36 | SetPadSize(); |
37 | SetNPads(); | |
b0f5e3fc | 38 | |
39 | } | |
2a4239d3 | 40 | //______________________________________________________________________ |
b0f5e3fc | 41 | AliITSsegmentationSDD::AliITSsegmentationSDD(){ |
e8189707 | 42 | // standard constructor |
b0f5e3fc | 43 | fGeom=0; |
03898a57 | 44 | fDriftSpeed=0; |
b0f5e3fc | 45 | fCorr=0; |
46 | SetDetSize(); | |
e8189707 | 47 | SetPadSize(); |
48 | SetNPads(); | |
b0f5e3fc | 49 | |
50 | } | |
2a4239d3 | 51 | //---------------------------------------------------------------------- |
b0f5e3fc | 52 | void AliITSsegmentationSDD::Init(){ |
53 | // Standard initilisation routine | |
54 | ||
e8189707 | 55 | if(!fGeom) { |
314ba410 | 56 | return; |
57 | //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom(); | |
e8189707 | 58 | } |
b0f5e3fc | 59 | AliITSgeomSDD *gsdd = (AliITSgeomSDD *) (fGeom->GetShape(3,1,1)); |
60 | ||
61 | const Float_t kconv=10000.; | |
62 | fDz = 2.*kconv*gsdd->GetDz(); | |
63 | fDx = kconv*gsdd->GetDx(); | |
64 | fDy = 2.*kconv*gsdd->GetDy(); | |
65 | } | |
66 | ||
2a4239d3 | 67 | //---------------------------------------------------------------------- |
b0f5e3fc | 68 | void AliITSsegmentationSDD:: |
314ba410 | 69 | Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){ |
70 | // returns neighbours for use in Cluster Finder routines and the like | |
b0f5e3fc | 71 | |
e8189707 | 72 | if(iX >= fNanodes) printf("iX > fNanodes %d %d\n",iX,fNanodes); |
73 | if(iZ >= fNsamples) printf("iZ > fNsamples %d %d\n",iZ,fNsamples); | |
b0f5e3fc | 74 | *Nlist=4; |
75 | Xlist[0]=Xlist[1]=iX; | |
314ba410 | 76 | if(iX && (iX != fNanodes/2)) Xlist[2]=iX-1; |
b0f5e3fc | 77 | else Xlist[2]=iX; |
314ba410 | 78 | if ((iX !=fNanodes/2 -1) && (iX != fNanodes)) Xlist[3]=iX+1; |
b0f5e3fc | 79 | else Xlist[3]=iX; |
80 | if(iZ) Zlist[0]=iZ-1; | |
81 | else Zlist[0]=iZ; | |
82 | if (iZ < fNsamples) Zlist[1]=iZ+1; | |
83 | else Zlist[1]=iZ; | |
84 | Zlist[2]=Zlist[3]=iZ; | |
b0f5e3fc | 85 | } |
2a4239d3 | 86 | //---------------------------------------------------------------------- |
87 | void AliITSsegmentationSDD::GetPadIxz(Float_t x,Float_t z, | |
88 | Int_t &timebin,Int_t &anode){ | |
03898a57 | 89 | // Returns cell coordinates (time sample,anode) incremented by 1 !!!!! |
90 | // for given real local coordinates (x,z) | |
b0f5e3fc | 91 | |
92 | // expects x, z in cm | |
93 | ||
94 | const Float_t kconv=10000; // cm->um | |
95 | ||
b0f5e3fc | 96 | Int_t na = fNanodes/2; |
97 | Float_t driftpath=fDx-TMath::Abs(kconv*x); | |
03898a57 | 98 | timebin=(Int_t)(driftpath/fDriftSpeed/fTimeStep); |
99 | anode=(Int_t)(kconv*(z/fPitch + na/2)); | |
b0f5e3fc | 100 | if (x > 0) anode += na; |
101 | ||
102 | timebin+=1; | |
103 | anode+=1; | |
104 | ||
105 | } | |
2a4239d3 | 106 | //---------------------------------------------------------------------- |
107 | void AliITSsegmentationSDD::GetPadCxz(Int_t timebin,Int_t anode, | |
108 | Float_t &x ,Float_t &z){ | |
b0f5e3fc | 109 | // Transform from cell to real local coordinates |
b0f5e3fc | 110 | // returns x, z in cm |
111 | ||
03898a57 | 112 | // the +0.5 means that an # and time bin # should start from 0 !!! |
b0f5e3fc | 113 | const Float_t kconv=10000; // um->cm |
03898a57 | 114 | // the +0.5 means that an # and time bin # should start from 0 !!! |
b0f5e3fc | 115 | |
b0f5e3fc | 116 | Int_t na = fNanodes/2; |
03898a57 | 117 | Float_t driftpath=(timebin+0.5)*fTimeStep*fDriftSpeed; |
b0f5e3fc | 118 | if (anode >= na) x=(fDx-driftpath)/kconv; |
119 | else x = -(fDx-driftpath)/kconv; | |
120 | if (anode >= na) anode-=na; | |
03898a57 | 121 | z=((anode+0.5)*fPitch-fDz/2)/kconv; |
b0f5e3fc | 122 | |
123 | } | |
2a4239d3 | 124 | //---------------------------------------------------------------------- |
e8189707 | 125 | void AliITSsegmentationSDD::GetPadTxz(Float_t &x,Float_t &z){ |
126 | // Get anode and time bucket as floats - numbering from 0 | |
127 | ||
128 | // expects x, z in cm | |
129 | ||
130 | const Float_t kconv=10000; // cm->um | |
131 | ||
2a4239d3 | 132 | Float_t x0=x; |
2a4239d3 | 133 | Int_t na = fNanodes/2; |
e8189707 | 134 | Float_t driftpath=fDx-TMath::Abs(kconv*x); |
03898a57 | 135 | x=driftpath/fDriftSpeed/fTimeStep; |
2a4239d3 | 136 | z=kconv*z/fPitch + (float)na/2; |
137 | if (x0 < 0) x = -x; | |
e8189707 | 138 | |
139 | } | |
2a4239d3 | 140 | //---------------------------------------------------------------------- |
b0f5e3fc | 141 | void AliITSsegmentationSDD::GetLocal(Int_t module,Float_t *g ,Float_t *l){ |
142 | // returns local coordinates from global | |
143 | if(!fGeom) { | |
314ba410 | 144 | return; |
145 | //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom(); | |
b0f5e3fc | 146 | } |
147 | fGeom->GtoL(module,g,l); | |
148 | } | |
2a4239d3 | 149 | //---------------------------------------------------------------------- |
b0f5e3fc | 150 | void AliITSsegmentationSDD::GetGlobal(Int_t module,Float_t *l ,Float_t *g){ |
151 | // return global coordinates from local | |
152 | if(!fGeom) { | |
314ba410 | 153 | return; |
154 | //fGeom = ((AliITS*)gAlice->GetModule("ITS"))->GetITSgeom(); | |
b0f5e3fc | 155 | } |
156 | ||
157 | fGeom->LtoG(module,l,g); | |
158 | ||
159 | } | |
f5d698b9 | 160 | //---------------------------------------------------------------------- |
db93954b | 161 | void AliITSsegmentationSDD::Print(Option_t *opt) const { |
f5d698b9 | 162 | // Print SDD segmentation Parameters |
163 | ||
164 | cout << "**************************************************" << endl; | |
165 | cout << " Silicon Drift Detector Segmentation Parameters " << endl; | |
166 | cout << "**************************************************" << endl; | |
167 | cout << "Number of Time Samples: " << fNsamples << endl; | |
168 | cout << "Number of Anodes: " << fNanodes << endl; | |
169 | cout << "Time Step (ns): " << fTimeStep << endl; | |
170 | cout << "Anode Pitch (um): " << fPitch << endl; | |
171 | cout << "Full Detector Width (x): " << fDx << endl; | |
172 | cout << "Half Detector Length (z): " << fDz << endl; | |
173 | cout << "Full Detector Thickness (y): " << fDy << endl; | |
174 | cout << "**************************************************" << endl; | |
175 | ||
176 | } | |
5752a110 | 177 | //______________________________________________________________________ |
178 | ||
179 | //______________________________________________________________________ | |
180 | void AliITSsegmentationSDD::LocalToDet(Float_t x,Float_t z,Int_t &ix,Int_t &iz){ | |
181 | // Transformation from Geant detector centered local coordinates (cm) to | |
182 | // time bucket numbers ix and anode number iz. | |
183 | // Input: | |
184 | // Float_t x detector local coordinate x in cm with respect to the | |
185 | // center of the sensitive volume. | |
186 | // Float_t z detector local coordinate z in cm with respect to the | |
187 | // center of the sensitive volulme. | |
188 | // Output: | |
189 | // Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples. | |
190 | // Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes. | |
191 | // A value of -1 for ix or iz indecates that this point is outside of the | |
192 | // detector segmentation as defined. | |
193 | // This segmentation geometry can be discribed as the following: | |
194 | // {assumes 2*Dx()=7.0cm Dz()=7.5264cm, Dpx()=25ns, | |
195 | // res->DeriftSpeed()=7.3mic/ns, Dpz()=512. For other values a only the | |
196 | // specific numbers will change not their layout.} | |
197 | // | |
198 | // 0 191 0 | |
199 | // 0 |----------------------|---------------------| 256 | |
200 | // | a time-bins | time-bins a | | |
201 | // | n | n | | |
202 | // | o |___________________o_|__> X | |
203 | // | d | d | | |
204 | // | e | e | | |
205 | // | s | s | | |
206 | // 255 |----------------------|---------------------| 511 | |
207 | // | | |
208 | // V | |
209 | // Z | |
210 | Float_t dx,dz,tb; | |
211 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
212 | ||
213 | ix = -1; // default values | |
214 | iz = -1; // default values | |
215 | dx = -kconv*Dx(); // lower left edge in cm. | |
216 | dz = -0.5*kconv*Dz(); // lower left edge in cm. | |
217 | if(x<dx || x>-dx) return; // outside of defined volume. | |
218 | if(z<dz || z>-dz) return; // outside of defined volume. | |
03898a57 | 219 | tb = fDriftSpeed*fTimeStep*kconv; // compute size of time bin. |
5752a110 | 220 | if(x>0) dx = -(dx + x)/tb; // distance from + side in time bin units |
221 | else dx = (x - dx)/tb; // distance from - side in time bin units | |
222 | dz = (z - dz)/(kconv*fPitch); // distance in z in anode pitch units | |
223 | ix = (Int_t) dx; // time bin | |
224 | iz = (Int_t) dz; // anode | |
225 | if(x>0) iz += Npz()/2; // if x>0 then + side anodes values. | |
226 | return; // Found ix and iz, return. | |
227 | } | |
228 | //______________________________________________________________________ | |
229 | void AliITSsegmentationSDD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) | |
230 | { | |
231 | // Transformation from Detector time bucket and anode coordiantes to Geant | |
232 | // detector centerd local coordinates (cm). | |
233 | // Input: | |
234 | // Int_t ix detector x time coordinate. Has the range 0<=ix<fNsamples. | |
235 | // Int_t iz detector z anode coordinate. Has the range 0<=iz<fNandoes. | |
236 | // Output: | |
237 | // Float_t x detector local coordinate x in cm with respect to the | |
238 | // center of the sensitive volume. | |
239 | // Float_t z detector local coordinate z in cm with respect to the | |
240 | // center of the sensitive volulme. | |
241 | // If ix and or iz is outside of the segmentation range a value of -Dx() | |
242 | // or -0.5*Dz() is returned. | |
243 | // This segmentation geometry can be discribed as the following: | |
244 | // {assumes 2*Dx()=7.0cm Dz()=7.5264cm, Dpx()=25ns, | |
245 | // res->DeriftSpeed()=7.3mic/ns, Dpz()=512. For other values a only the | |
246 | // specific numbers will change not their layout.} | |
247 | // | |
248 | // 0 191 0 | |
249 | // 0 |----------------------|---------------------| 256 | |
250 | // | a time-bins | time-bins a | | |
251 | // | n | n | | |
252 | // | o |___________________o_|__> X | |
253 | // | d | d | | |
254 | // | e | e | | |
255 | // | s | s | | |
256 | // 255 |----------------------|---------------------| 511 | |
257 | // | | |
258 | // V | |
259 | // Z | |
260 | Int_t i,j; | |
261 | Float_t tb; | |
262 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
263 | ||
264 | if(iz>=Npz()/2) x = kconv*Dx(); // default value for +x side. | |
265 | else x = -kconv*Dx(); // default value for -x side. | |
266 | z = -0.5*kconv*Dz(); // default value. | |
267 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
268 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
03898a57 | 269 | tb = fDriftSpeed*fTimeStep*kconv; // compute size of time bin. |
5752a110 | 270 | if(iz>=Npz()/2) tb *= -1.0; // for +x side decrement frmo Dx(). |
271 | for(i=0;i<ix;i++) x += tb; // sum up to cell ix-1 | |
272 | x += 0.5*tb; // add 1/2 of cell ix for center location. | |
273 | if(iz>=Npz()/2) iz -=Npz()/2;// If +x side don't count anodes from -x side. | |
274 | for(j=0;j<iz;j++) z += kconv*fPitch; // sum up cell iz-1 | |
275 | z += 0.5*kconv*fPitch; // add 1/2 of cell iz for center location. | |
276 | return; // Found x and z, return. | |
277 | } |