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1b923461 | 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 | ||
16 | ////////////////////////////////////////////////////////////////////////////// | |
17 | // // | |
18 | // AliTPCBoundaryVoltError class // | |
19 | // The class calculates the space point distortions due to residual voltage // | |
20 | // errors on the main boundaries of the TPC. For example, the inner vessel // | |
21 | // of the TPC is shifted by a certain amount, whereas the ROCs on the A side// | |
22 | // and the ROCs on the C side follow this mechanical shift (at the inner // | |
23 | // vessel) in z direction (see example below). This example is commonly // | |
24 | // named "conical deformation" of the TPC field cage. // | |
25 | // // | |
26 | // The class allows "effective Omega Tau" corrections. // | |
27 | // // | |
c9cbd2f2 | 28 | // NOTE: This class is capable of calculating z distortions due to // |
1b923461 | 29 | // drift velocity change in dependence of the electric field!!! // |
30 | // // | |
31 | // date: 01/06/2010 // | |
32 | // Authors: Jim Thomas, Stefan Rossegger // | |
33 | // // | |
34 | // Example usage (e.g +1mm shift of "conical deformation") // | |
35 | // AliTPCBoundaryVoltError bve; // | |
36 | // Float_t boundA[8] = {-40,-40,-40,0,0,0,0,-40}; // voltages A-side // | |
37 | // Float_t boundC[6] = { 40, 40, 40,0,0,0}; // voltages C-side // | |
38 | // bve.SetBoundariesA(boundA); // | |
39 | // bve.SetBoundariesC(boundC); // | |
40 | // bve.SetOmegaTauT1T2(0.32,1.,1.); // values ideally from OCDB // | |
41 | // // initialization of the look up // | |
42 | // bve.InitBoundaryVoltErrorDistortion(); // | |
43 | // // plot dRPhi distortions ... // | |
44 | // bve.CreateHistoDRPhiinZR(1.,100,100)->Draw("surf2"); // | |
45 | ////////////////////////////////////////////////////////////////////////////// | |
46 | ||
47 | #include "AliMagF.h" | |
48 | #include "TGeoGlobalMagField.h" | |
49 | #include "AliTPCcalibDB.h" | |
50 | #include "AliTPCParam.h" | |
51 | #include "AliLog.h" | |
52 | #include "TMatrixD.h" | |
53 | ||
54 | #include "TMath.h" | |
55 | #include "AliTPCROC.h" | |
56 | #include "AliTPCBoundaryVoltError.h" | |
57 | ||
58 | ClassImp(AliTPCBoundaryVoltError) | |
59 | ||
60 | AliTPCBoundaryVoltError::AliTPCBoundaryVoltError() | |
61 | : AliTPCCorrection("BoundaryVoltError","Boundary Voltage Error"), | |
62 | fC0(0.),fC1(0.), | |
c9cbd2f2 | 63 | fROCdisplacement(kTRUE), |
1b923461 | 64 | fInitLookUp(kFALSE) |
65 | { | |
66 | // | |
67 | // default constructor | |
68 | // | |
69 | for (Int_t i=0; i<8; i++){ | |
70 | fBoundariesA[i]= 0; | |
71 | if (i<6) fBoundariesC[i]= 0; | |
72 | } | |
73 | } | |
74 | ||
75 | AliTPCBoundaryVoltError::~AliTPCBoundaryVoltError() { | |
76 | // | |
77 | // default destructor | |
78 | // | |
79 | } | |
80 | ||
81 | ||
82 | ||
83 | void AliTPCBoundaryVoltError::Init() { | |
84 | // | |
85 | // Initialization funtion | |
86 | // | |
87 | ||
88 | AliMagF* magF= (AliMagF*)TGeoGlobalMagField::Instance()->GetField(); | |
89 | if (!magF) AliError("Magneticd field - not initialized"); | |
90 | Double_t bzField = magF->SolenoidField()/10.; //field in T | |
91 | AliTPCParam *param= AliTPCcalibDB::Instance()->GetParameters(); | |
92 | if (!param) AliError("Parameters - not initialized"); | |
93 | Double_t vdrift = param->GetDriftV()/1000000.; // [cm/us] // From dataBase: to be updated: per second (ideally) | |
94 | Double_t ezField = 400; // [V/cm] // to be updated: never (hopefully) | |
95 | Double_t wt = -10.0 * (bzField*10) * vdrift / ezField ; | |
96 | // Correction Terms for effective omegaTau; obtained by a laser calibration run | |
97 | SetOmegaTauT1T2(wt,fT1,fT2); | |
98 | ||
99 | InitBoundaryVoltErrorDistortion(); | |
100 | } | |
101 | ||
102 | void AliTPCBoundaryVoltError::Update(const TTimeStamp &/*timeStamp*/) { | |
103 | // | |
104 | // Update function | |
105 | // | |
106 | AliMagF* magF= (AliMagF*)TGeoGlobalMagField::Instance()->GetField(); | |
107 | if (!magF) AliError("Magneticd field - not initialized"); | |
108 | Double_t bzField = magF->SolenoidField()/10.; //field in T | |
109 | AliTPCParam *param= AliTPCcalibDB::Instance()->GetParameters(); | |
110 | if (!param) AliError("Parameters - not initialized"); | |
111 | Double_t vdrift = param->GetDriftV()/1000000.; // [cm/us] // From dataBase: to be updated: per second (ideally) | |
112 | Double_t ezField = 400; // [V/cm] // to be updated: never (hopefully) | |
113 | Double_t wt = -10.0 * (bzField*10) * vdrift / ezField ; | |
114 | // Correction Terms for effective omegaTau; obtained by a laser calibration run | |
115 | SetOmegaTauT1T2(wt,fT1,fT2); | |
116 | ||
1b923461 | 117 | } |
118 | ||
119 | ||
120 | ||
121 | void AliTPCBoundaryVoltError::GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]) { | |
122 | // | |
123 | // Calculates the correction due e.g. residual voltage errors on the TPC boundaries | |
124 | // | |
125 | ||
c9cbd2f2 | 126 | if (!fInitLookUp) { |
127 | AliInfo("Lookup table was not initialized! Perform the inizialisation now ..."); | |
128 | InitBoundaryVoltErrorDistortion(); | |
129 | } | |
1b923461 | 130 | |
131 | Int_t order = 1 ; // FIXME: hardcoded? Linear interpolation = 1, Quadratic = 2 | |
132 | // note that the poisson solution was linearly mirroed on this grid! | |
c9cbd2f2 | 133 | Double_t intEr, intEphi, intdEz ; |
1b923461 | 134 | Double_t r, phi, z ; |
135 | Int_t sign; | |
136 | ||
137 | r = TMath::Sqrt( x[0]*x[0] + x[1]*x[1] ) ; | |
138 | phi = TMath::ATan2(x[1],x[0]) ; | |
139 | if ( phi < 0 ) phi += TMath::TwoPi() ; // Table uses phi from 0 to 2*Pi | |
140 | z = x[2] ; // Create temporary copy of x[2] | |
141 | ||
142 | if ( (roc%36) < 18 ) { | |
143 | sign = 1; // (TPC A side) | |
144 | } else { | |
145 | sign = -1; // (TPC C side) | |
146 | } | |
147 | ||
148 | if ( sign==1 && z < fgkZOffSet ) z = fgkZOffSet; // Protect against discontinuity at CE | |
149 | if ( sign==-1 && z > -fgkZOffSet ) z = -fgkZOffSet; // Protect against discontinuity at CE | |
150 | ||
151 | ||
152 | intEphi = 0.0; // Efield is symmetric in phi - 2D calculation | |
153 | ||
154 | if ( (sign==1 && z<0) || (sign==-1 && z>0) ) // just a consistency check | |
155 | AliError("ROC number does not correspond to z coordinate! Calculation of distortions is most likely wrong!"); | |
156 | ||
157 | // Get the E field integral | |
158 | Interpolate2DEdistortion( order, r, z, fLookUpErOverEz, intEr ); | |
c9cbd2f2 | 159 | // Get DeltaEz field integral |
160 | Interpolate2DEdistortion( order, r, z, fLookUpDeltaEz, intdEz ); | |
1b923461 | 161 | |
162 | // Calculate distorted position | |
163 | if ( r > 0.0 ) { | |
164 | phi = phi + ( fC0*intEphi - fC1*intEr ) / r; | |
165 | r = r + ( fC0*intEr + fC1*intEphi ); | |
166 | } | |
167 | ||
168 | // Calculate correction in cartesian coordinates | |
169 | dx[0] = r * TMath::Cos(phi) - x[0]; | |
170 | dx[1] = r * TMath::Sin(phi) - x[1]; | |
c9cbd2f2 | 171 | dx[2] = intdEz; // z distortion - (internally scaled with driftvelocity dependency |
172 | // on the Ez field plus the actual ROC misalignment (if set TRUE) | |
173 | ||
1b923461 | 174 | |
175 | } | |
176 | ||
177 | void AliTPCBoundaryVoltError::InitBoundaryVoltErrorDistortion() { | |
178 | // | |
179 | // Initialization of the Lookup table which contains the solutions of the | |
180 | // Dirichlet boundary problem | |
181 | // | |
182 | ||
183 | const Float_t gridSizeR = (fgkOFCRadius-fgkIFCRadius) / (kRows-1) ; | |
184 | const Float_t gridSizeZ = fgkTPCZ0 / (kColumns-1) ; | |
185 | ||
186 | TMatrixD voltArrayA(kRows,kColumns), voltArrayC(kRows,kColumns); // boundary vectors | |
187 | TMatrixD chargeDensity(kRows,kColumns); // dummy charge | |
188 | TMatrixD arrayErOverEzA(kRows,kColumns), arrayErOverEzC(kRows,kColumns); // solution | |
c9cbd2f2 | 189 | TMatrixD arrayDeltaEzA(kRows,kColumns), arrayDeltaEzC(kRows,kColumns); // solution |
1b923461 | 190 | |
191 | Double_t rList[kRows], zedList[kColumns] ; | |
192 | ||
193 | // Fill arrays with initial conditions. V on the boundary and ChargeDensity in the volume. | |
194 | for ( Int_t j = 0 ; j < kColumns ; j++ ) { | |
195 | Double_t zed = j*gridSizeZ ; | |
196 | zedList[j] = zed ; | |
197 | for ( Int_t i = 0 ; i < kRows ; i++ ) { | |
198 | Double_t radius = fgkIFCRadius + i*gridSizeR ; | |
199 | rList[i] = radius ; | |
200 | voltArrayA(i,j) = 0; // Initialize voltArrayA to zero | |
201 | voltArrayC(i,j) = 0; // Initialize voltArrayC to zero | |
202 | chargeDensity(i,j) = 0; // Initialize ChargeDensity to zero - not used in this class | |
203 | } | |
204 | } | |
205 | ||
206 | ||
207 | // check if boundary values are the same for the C side (for later, saving some calculation time) | |
208 | ||
209 | Int_t symmetry = -1; // assume that A and C side are identical (but anti-symmetric!) // e.g conical deformation | |
210 | Int_t sVec[8]; | |
211 | ||
212 | // check if boundaries are different (regardless the sign) | |
213 | for (Int_t i=0; i<8; i++) { | |
35108d57 | 214 | if (TMath::Abs(TMath::Abs(fBoundariesA[i]) - TMath::Abs(fBoundariesC[i])) > 1e-5) |
215 | symmetry = 0; | |
216 | sVec[i] = (Int_t)( TMath::Sign((Float_t)1.,fBoundariesA[i]) * TMath::Sign((Float_t)1.,fBoundariesC[i])); | |
1b923461 | 217 | } |
218 | if (symmetry==-1) { // still the same values? | |
219 | // check the kind of symmetry , if even ... | |
220 | if (sVec[0]==1 && sVec[1]==1 && sVec[2]==1 && sVec[3]==1 && sVec[4]==1 && sVec[5]==1 && sVec[6]==1 && sVec[7]==1 ) | |
221 | symmetry = 1; | |
222 | else if (sVec[0]==-1 && sVec[1]==-1 && sVec[2]==-1 && sVec[3]==-1 && sVec[4]==-1 && sVec[5]==-1 && sVec[6]==-1 && sVec[7]==-1 ) | |
223 | symmetry = -1; | |
224 | else | |
225 | symmetry = 0; // some of the values differ in the sign -> neither symmetric nor antisymmetric | |
226 | } | |
227 | ||
228 | ||
229 | ||
230 | // Solve the electrosatic problem in 2D | |
231 | ||
232 | // Fill the complete Boundary vectors | |
233 | // Start at IFC at CE and work anti-clockwise through IFC, ROC, OFC, and CE (clockwise for C side) | |
234 | for ( Int_t j = 0 ; j < kColumns ; j++ ) { | |
235 | Double_t zed = j*gridSizeZ ; | |
236 | for ( Int_t i = 0 ; i < kRows ; i++ ) { | |
237 | Double_t radius = fgkIFCRadius + i*gridSizeR ; | |
238 | ||
239 | // A side boundary vectors | |
240 | if ( i == 0 ) voltArrayA(i,j) += zed *((fBoundariesA[1]-fBoundariesA[0])/((kColumns-1)*gridSizeZ)) | |
241 | + fBoundariesA[0] ; // IFC | |
c9cbd2f2 | 242 | if ( j == kColumns-1 ) voltArrayA(i,j) += (radius-fgkIFCRadius)*((fBoundariesA[3]-fBoundariesA[2])/((kRows-1)*gridSizeR)) |
1b923461 | 243 | + fBoundariesA[2] ; // ROC |
244 | if ( i == kRows-1 ) voltArrayA(i,j) += zed *((fBoundariesA[4]-fBoundariesA[5])/((kColumns-1)*gridSizeZ)) | |
245 | + fBoundariesA[5] ; // OFC | |
c9cbd2f2 | 246 | if ( j == 0 ) voltArrayA(i,j) += (radius-fgkIFCRadius)*((fBoundariesA[6]-fBoundariesA[7])/((kRows-1)*gridSizeR)) |
1b923461 | 247 | + fBoundariesA[7] ; // CE |
c9cbd2f2 | 248 | |
1b923461 | 249 | if (symmetry==0) { |
250 | // C side boundary vectors | |
251 | if ( i == 0 ) voltArrayC(i,j) += zed *((fBoundariesC[1]-fBoundariesC[0])/((kColumns-1)*gridSizeZ)) | |
252 | + fBoundariesC[0] ; // IFC | |
c9cbd2f2 | 253 | if ( j == kColumns-1 ) voltArrayC(i,j) += (radius-fgkIFCRadius)*((fBoundariesC[3]-fBoundariesC[2])/((kRows-1)*gridSizeR)) |
1b923461 | 254 | + fBoundariesC[2] ; // ROC |
255 | if ( i == kRows-1 ) voltArrayC(i,j) += zed *((fBoundariesC[4]-fBoundariesC[5])/((kColumns-1)*gridSizeZ)) | |
256 | + fBoundariesC[5] ; // OFC | |
c9cbd2f2 | 257 | if ( j == 0 ) voltArrayC(i,j) += (radius-fgkIFCRadius)*((fBoundariesC[6]-fBoundariesC[7])/((kRows-1)*gridSizeR)) |
1b923461 | 258 | + fBoundariesC[7] ; // CE |
1b923461 | 259 | } |
c9cbd2f2 | 260 | |
1b923461 | 261 | } |
262 | } | |
263 | ||
264 | voltArrayA(0,0) *= 0.5 ; // Use average boundary condition at corner | |
265 | voltArrayA(kRows-1,0) *= 0.5 ; // Use average boundary condition at corner | |
266 | voltArrayA(0,kColumns-1) *= 0.5 ; // Use average boundary condition at corner | |
267 | voltArrayA(kRows-1,kColumns-1)*= 0.5 ; // Use average boundary condition at corner | |
268 | ||
269 | if (symmetry==0) { | |
270 | voltArrayC(0,0) *= 0.5 ; // Use average boundary condition at corner | |
271 | voltArrayC(kRows-1,0) *= 0.5 ; // Use average boundary condition at corner | |
272 | voltArrayC(0,kColumns-1) *= 0.5 ; // Use average boundary condition at corner | |
273 | voltArrayC(kRows-1,kColumns-1)*= 0.5 ; // Use average boundary condition at corner | |
274 | } | |
275 | ||
276 | ||
277 | // always solve the problem on the A side | |
c9cbd2f2 | 278 | PoissonRelaxation2D( voltArrayA, chargeDensity, arrayErOverEzA, arrayDeltaEzA, |
279 | kRows, kColumns, kIterations, fROCdisplacement ) ; | |
1b923461 | 280 | |
281 | if (symmetry!=0) { // A and C side are the same ("anti-symmetric" or "symmetric") | |
282 | for ( Int_t j = 0 ; j < kColumns ; j++ ) { | |
283 | for ( Int_t i = 0 ; i < kRows ; i++ ) { | |
284 | arrayErOverEzC(i,j) = symmetry*arrayErOverEzA(i,j); | |
c9cbd2f2 | 285 | arrayDeltaEzC(i,j) = -symmetry*arrayDeltaEzA(i,j); |
1b923461 | 286 | } |
287 | } | |
288 | } else if (symmetry==0) { // A and C side are different - Solve the problem on the C side too | |
c9cbd2f2 | 289 | PoissonRelaxation2D( voltArrayC, chargeDensity, arrayErOverEzC, arrayDeltaEzC, |
290 | kRows, kColumns, kIterations, fROCdisplacement ) ; | |
291 | for ( Int_t j = 0 ; j < kColumns ; j++ ) { | |
292 | for ( Int_t i = 0 ; i < kRows ; i++ ) { | |
293 | arrayDeltaEzC(i,j) = -arrayDeltaEzC(i,j); // negative z coordinate! | |
294 | } | |
295 | } | |
1b923461 | 296 | } |
297 | ||
35108d57 | 298 | // Interpolate results onto standard grid for Electric Fields |
1b923461 | 299 | Int_t ilow=0, jlow=0 ; |
300 | Double_t z,r; | |
301 | Float_t saveEr[2] ; | |
c9cbd2f2 | 302 | Float_t saveEz[2] ; |
1b923461 | 303 | for ( Int_t i = 0 ; i < kNZ ; ++i ) { |
304 | z = TMath::Abs( fgkZList[i] ) ; | |
305 | for ( Int_t j = 0 ; j < kNR ; ++j ) { | |
306 | // Linear interpolation !! | |
307 | r = fgkRList[j] ; | |
c9cbd2f2 | 308 | Search( kRows, rList, r, ilow ) ; // Note switch - R in rows and Z in columns |
309 | Search( kColumns, zedList, z, jlow ) ; | |
310 | if ( ilow < 0 ) ilow = 0 ; // check if out of range | |
311 | if ( jlow < 0 ) jlow = 0 ; | |
312 | if ( ilow + 1 >= kRows - 1 ) ilow = kRows - 2 ; | |
313 | if ( jlow + 1 >= kColumns - 1 ) jlow = kColumns - 2 ; | |
314 | ||
315 | if (fgkZList[i]>0) { // A side solution | |
316 | saveEr[0] = arrayErOverEzA(ilow,jlow) + | |
317 | (arrayErOverEzA(ilow,jlow+1)-arrayErOverEzA(ilow,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
318 | saveEr[1] = arrayErOverEzA(ilow+1,jlow) + | |
319 | (arrayErOverEzA(ilow+1,jlow+1)-arrayErOverEzA(ilow+1,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
320 | saveEz[0] = arrayDeltaEzA(ilow,jlow) + | |
321 | (arrayDeltaEzA(ilow,jlow+1)-arrayDeltaEzA(ilow,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
322 | saveEz[1] = arrayDeltaEzA(ilow+1,jlow) + | |
323 | (arrayDeltaEzA(ilow+1,jlow+1)-arrayDeltaEzA(ilow+1,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
324 | ||
325 | } else if (fgkZList[i]<0) { // C side solution | |
326 | saveEr[0] = arrayErOverEzC(ilow,jlow) + | |
327 | (arrayErOverEzC(ilow,jlow+1)-arrayErOverEzC(ilow,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
328 | saveEr[1] = arrayErOverEzC(ilow+1,jlow) + | |
329 | (arrayErOverEzC(ilow+1,jlow+1)-arrayErOverEzC(ilow+1,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
330 | saveEz[0] = arrayDeltaEzC(ilow,jlow) + | |
331 | (arrayDeltaEzC(ilow,jlow+1)-arrayDeltaEzC(ilow,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
332 | saveEz[1] = arrayDeltaEzC(ilow+1,jlow) + | |
333 | (arrayDeltaEzC(ilow+1,jlow+1)-arrayDeltaEzC(ilow+1,jlow))*(z-zedList[jlow])/gridSizeZ ; | |
334 | ||
335 | } else { | |
336 | AliWarning("Field calculation at z=0 (CE) is not allowed!"); | |
337 | saveEr[0]=0; saveEr[1]=0; | |
338 | saveEz[0]=0; saveEz[1]=0; | |
1b923461 | 339 | } |
c9cbd2f2 | 340 | fLookUpErOverEz[i][j] = saveEr[0] + (saveEr[1]-saveEr[0])*(r-rList[ilow])/gridSizeR ; |
341 | fLookUpDeltaEz[i][j] = saveEz[0] + (saveEz[1]-saveEz[0])*(r-rList[ilow])/gridSizeR ; | |
342 | } | |
1b923461 | 343 | } |
344 | ||
c9cbd2f2 | 345 | voltArrayA.Clear(); |
346 | voltArrayC.Clear(); | |
347 | chargeDensity.Clear(); | |
348 | arrayErOverEzA.Clear(); | |
349 | arrayErOverEzC.Clear(); | |
350 | arrayDeltaEzA.Clear(); | |
351 | arrayDeltaEzC.Clear(); | |
352 | ||
1b923461 | 353 | fInitLookUp = kTRUE; |
354 | ||
355 | } | |
356 | ||
357 | void AliTPCBoundaryVoltError::Print(const Option_t* option) const { | |
358 | // | |
359 | // Print function to check the settings of the boundary vectors | |
360 | // option=="a" prints the C0 and C1 coefficents for calibration purposes | |
361 | // | |
362 | ||
363 | TString opt = option; opt.ToLower(); | |
364 | printf("%s\n",GetTitle()); | |
365 | printf(" - Voltage settings (on the TPC boundaries) - linearly interpolated\n"); | |
366 | printf(" : A-side (anti-clockwise)\n"); | |
367 | printf(" (0,1):\t IFC (CE) : %3.1f V \t IFC (ROC): %3.1f V \n",fBoundariesA[0],fBoundariesA[1]); | |
368 | printf(" (2,3):\t ROC (IFC): %3.1f V \t ROC (OFC): %3.1f V \n",fBoundariesA[2],fBoundariesA[3]); | |
369 | printf(" (4,5):\t OFC (ROC): %3.1f V \t OFC (CE) : %3.1f V \n",fBoundariesA[4],fBoundariesA[5]); | |
370 | printf(" (6,7):\t CE (OFC): %3.1f V \t CE (IFC): %3.1f V \n",fBoundariesA[6],fBoundariesA[7]); | |
371 | printf(" : C-side (clockwise)\n"); | |
372 | printf(" (0,1):\t IFC (CE) : %3.1f V \t IFC (ROC): %3.1f V \n",fBoundariesC[0],fBoundariesC[1]); | |
373 | printf(" (2,3):\t ROC (IFC): %3.1f V \t ROC (OFC): %3.1f V \n",fBoundariesC[2],fBoundariesC[3]); | |
374 | printf(" (4,5):\t OFC (ROC): %3.1f V \t OFC (CE) : %3.1f V \n",fBoundariesC[4],fBoundariesC[5]); | |
375 | printf(" (6,7):\t CE (OFC): %3.1f V \t CE (IFC): %3.1f V \n",fBoundariesC[6],fBoundariesC[7]); | |
376 | ||
377 | // Check wether the settings of the Central Electrode agree (on the A and C side) | |
378 | // Note: they have to be antisymmetric! | |
379 | if (( TMath::Abs(fBoundariesA[6]+fBoundariesC[6])>1e-5) || ( TMath::Abs(fBoundariesA[7]+fBoundariesC[7])>1e-5 ) ){ | |
380 | AliWarning("Boundary parameters for the Central Electrode (CE) are not anti-symmetric! HOW DID YOU MANAGE THAT?"); | |
381 | AliWarning("Congratulations, you just splitted the Central Electrode of the TPC!"); | |
382 | AliWarning("Non-physical settings of the boundary parameter at the Central Electrode"); | |
383 | } | |
384 | ||
385 | if (opt.Contains("a")) { // Print all details | |
386 | printf(" - T1: %1.4f, T2: %1.4f \n",fT1,fT2); | |
387 | printf(" - C1: %1.4f, C0: %1.4f \n",fC1,fC0); | |
388 | } | |
389 | ||
c9cbd2f2 | 390 | if (!fInitLookUp) |
391 | AliError("Lookup table was not initialized! You should do InitBoundaryVoltErrorDistortion() ..."); | |
1b923461 | 392 | |
393 | } | |
394 | ||
395 | ||
396 | void AliTPCBoundaryVoltError::SetBoundariesA(Float_t boundariesA[8]){ | |
397 | // | |
398 | // set voltage errors on the TPC boundaries - A side | |
399 | // | |
400 | // Start at IFC at the Central electrode and work anti-clockwise (clockwise for C side) through | |
401 | // IFC, ROC, OFC, and CE. The boundary conditions are currently defined to be a linear | |
402 | // interpolation between pairs of numbers in the Boundary (e.g. fBoundariesA) vector. | |
403 | // The first pair of numbers represent the beginning and end of the Inner Field cage, etc. | |
404 | // The unit of the error potential vector is [Volt], whereas 1mm shift of the IFC would | |
405 | // correspond to ~ 40 V | |
406 | // | |
407 | // Note: The setting for the CE will be passed to the C side! | |
408 | ||
409 | for (Int_t i=0; i<8; i++) { | |
410 | fBoundariesA[i]= boundariesA[i]; | |
411 | if (i>5) fBoundariesC[i]= -boundariesA[i]; // setting for the CE is passed to C side | |
412 | } | |
c9cbd2f2 | 413 | fInitLookUp=kFALSE; |
1b923461 | 414 | } |
415 | void AliTPCBoundaryVoltError::SetBoundariesC(Float_t boundariesC[6]){ | |
416 | // | |
c9cbd2f2 | 417 | // set voltage errors on the TPC boundaries - C side |
1b923461 | 418 | // |
419 | // Start at IFC at the Central electrode and work clockwise (for C side) through | |
420 | // IFC, ROC and OFC. The boundary conditions are currently defined to be a linear | |
421 | // interpolation between pairs of numbers in the Boundary (e.g. fBoundariesC) vector. | |
422 | // The first pair of numbers represent the beginning and end of the Inner Field cage, etc. | |
423 | // The unit of the error potential vector is [Volt], whereas 1mm shift of the IFC would | |
424 | // correspond to ~ 40 V | |
425 | // | |
426 | // Note: The setting for the CE will be taken from the A side (pos 6 and 7)! | |
427 | ||
428 | for (Int_t i=0; i<6; i++) { | |
429 | fBoundariesC[i]= boundariesC[i]; | |
430 | } | |
c9cbd2f2 | 431 | fInitLookUp=kFALSE; |
1b923461 | 432 | } |