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84737f5e | 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 | ||
acd84897 | 16 | /* $Id$ */ |
84737f5e | 17 | |
5d8718b8 | 18 | //------------------------------------------------------------------------ |
19 | // Magnetic field composed by 3 maps: the L3 magnet, extended region, and | |
20 | // dipole magnet | |
21 | // Used in the configuration macros (macros/Config.C, etc.) | |
84737f5e | 22 | // Author: Andreas Morsch <andreas.morsch@cern.ch> |
5d8718b8 | 23 | //------------------------------------------------------------------------ |
84737f5e | 24 | |
25 | #include <TFile.h> | |
26 | #include <TSystem.h> | |
116cbefd | 27 | #include <TVector.h> |
e2afb3b6 | 28 | |
84737f5e | 29 | #include "AliFieldMap.h" |
30 | #include "AliMagFMaps.h" | |
31 | ||
32 | ||
33 | ClassImp(AliMagFMaps) | |
34 | ||
e2afb3b6 | 35 | //_______________________________________________________________________ |
36 | AliMagFMaps::AliMagFMaps(): | |
37 | fSolenoid(0), | |
02b50693 | 38 | fSolenoidUser(0.), |
e2afb3b6 | 39 | fL3Option(0), |
40 | fFieldRead(0) | |
41 | { | |
42 | // | |
43 | // Default constructor | |
44 | // | |
45 | fFieldMap[0] = fFieldMap[1] = fFieldMap[2] = 0; | |
46 | } | |
47 | ||
48 | //_______________________________________________________________________ | |
84737f5e | 49 | AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ, |
e2afb3b6 | 50 | const Float_t factor, const Float_t fmax, const Int_t map, |
51 | const Int_t l3): | |
52 | AliMagF(name,title,integ,factor,fmax), | |
53 | fSolenoid(0), | |
02b50693 | 54 | fSolenoidUser(0), |
e2afb3b6 | 55 | fL3Option(l3), |
56 | fFieldRead(0) | |
84737f5e | 57 | { |
58 | // | |
59 | // Standard constructor | |
60 | // | |
61 | fType = kConMesh; | |
62 | fFieldMap[0] = 0; | |
c2b548d6 | 63 | fMap = map; |
64 | fL3Option = l3; | |
c2b548d6 | 65 | ReadField(); |
66 | fFieldRead = 1; | |
e2afb3b6 | 67 | // |
68 | // Don't replicate field information in gAlice | |
7b6cddfa | 69 | for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0); |
e2afb3b6 | 70 | // |
84737f5e | 71 | } |
72 | ||
e2afb3b6 | 73 | //_______________________________________________________________________ |
74 | AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf): | |
75 | AliMagF(magf), | |
76 | fSolenoid(0), | |
77 | fL3Option(0), | |
78 | fFieldRead(0) | |
84737f5e | 79 | { |
80 | // | |
81 | // Copy constructor | |
82 | // | |
83 | magf.Copy(*this); | |
84 | } | |
85 | ||
e2afb3b6 | 86 | //_______________________________________________________________________ |
84737f5e | 87 | AliMagFMaps::~AliMagFMaps() |
88 | { | |
e2afb3b6 | 89 | // |
90 | // Destructor | |
91 | // | |
92 | delete fFieldMap[0]; | |
93 | delete fFieldMap[1]; | |
94 | delete fFieldMap[2]; | |
84737f5e | 95 | } |
96 | ||
e2afb3b6 | 97 | //_______________________________________________________________________ |
c2b548d6 | 98 | void AliMagFMaps::ReadField() |
99 | { | |
e2afb3b6 | 100 | // Read Field Map from file |
101 | // | |
102 | // don't read twice | |
103 | // | |
104 | if (fFieldRead) return; | |
105 | fFieldRead = 1; | |
106 | // | |
107 | char* fname; | |
108 | TFile* file = 0; | |
109 | if (fMap == k2kG) { | |
177a7fab | 110 | if (fL3Option) { |
111 | fSolenoid = 2.; | |
112 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root"); | |
113 | file = new TFile(fname); | |
114 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B02")); | |
115 | file->Close(); | |
116 | delete file; | |
117 | } | |
118 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root"); | |
e2afb3b6 | 119 | file = new TFile(fname); |
177a7fab | 120 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB02")); |
121 | file->Close(); | |
122 | delete file;; | |
123 | ||
124 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root"); | |
125 | file = new TFile(fname); | |
126 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB02")); | |
e2afb3b6 | 127 | file->Close(); |
128 | delete file; | |
177a7fab | 129 | |
e2afb3b6 | 130 | } else if (fMap == k4kG) { |
177a7fab | 131 | if (fL3Option) { |
132 | fSolenoid = 4.; | |
133 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root"); | |
134 | file = new TFile(fname); | |
135 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B04")); | |
136 | file->Close(); | |
137 | delete file; | |
138 | } | |
139 | ||
140 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root"); | |
e2afb3b6 | 141 | file = new TFile(fname); |
177a7fab | 142 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB04")); |
143 | file->Close(); | |
144 | delete file; | |
145 | ||
146 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root"); | |
147 | file = new TFile(fname); | |
148 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB04")); | |
e2afb3b6 | 149 | file->Close(); |
150 | delete file; | |
e2afb3b6 | 151 | } else if (fMap == k5kG) { |
177a7fab | 152 | if (fL3Option) { |
153 | fSolenoid = 5.; | |
154 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root"); | |
155 | file = new TFile(fname); | |
156 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B05")); | |
157 | file->Close(); | |
158 | delete file; | |
159 | } | |
160 | ||
161 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root"); | |
e2afb3b6 | 162 | file = new TFile(fname); |
177a7fab | 163 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB05")); |
e2afb3b6 | 164 | file->Close(); |
165 | delete file; | |
177a7fab | 166 | |
167 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root"); | |
168 | file = new TFile(fname); | |
169 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB05")); | |
170 | file->Close(); | |
171 | delete file; | |
172 | ||
e2afb3b6 | 173 | } |
174 | ||
175 | if (!fL3Option) { | |
177a7fab | 176 | // |
177 | // Dummy L3 map | |
178 | fFieldMap[0] = new AliFieldMap(); | |
179 | fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.); | |
180 | switch(fMap) { | |
181 | case k2kG: | |
182 | fSolenoid = 2.; | |
183 | break; | |
184 | case k4kG: | |
185 | fSolenoid = 4.; | |
186 | break; | |
187 | case k5kG: | |
188 | fSolenoid = 5.; | |
189 | break; | |
177a7fab | 190 | } |
02b50693 | 191 | fSolenoidUser = fSolenoid; |
e2afb3b6 | 192 | } |
c2b548d6 | 193 | } |
194 | ||
e2afb3b6 | 195 | //_______________________________________________________________________ |
84737f5e | 196 | Float_t AliMagFMaps::SolenoidField() const |
197 | { | |
e2afb3b6 | 198 | // |
199 | // Returns max. L3 (solenoid) field strength | |
200 | // according to field map setting | |
201 | // | |
202 | return fSolenoid; | |
84737f5e | 203 | } |
204 | ||
e2afb3b6 | 205 | //_______________________________________________________________________ |
84737f5e | 206 | void AliMagFMaps::Field(Float_t *x, Float_t *b) |
207 | { | |
208 | // | |
209 | // Method to calculate the magnetic field | |
210 | // | |
84737f5e | 211 | // --- find the position in the grid --- |
212 | ||
ee4f31cd | 213 | if (!fFieldRead) ReadField(); |
e2afb3b6 | 214 | |
84737f5e | 215 | b[0]=b[1]=b[2]=0; |
216 | AliFieldMap* map = 0; | |
84737f5e | 217 | if (fFieldMap[0]->Inside(x[0], x[1], x[2])) { |
177a7fab | 218 | map = fFieldMap[0]; |
219 | if (!fL3Option) { | |
e2afb3b6 | 220 | // |
221 | // Constant L3 field, if this option was selected | |
222 | // | |
02b50693 | 223 | b[2] = fSolenoidUser; |
84737f5e | 224 | return; |
e2afb3b6 | 225 | } |
84737f5e | 226 | } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) { |
177a7fab | 227 | map = fFieldMap[1]; |
84737f5e | 228 | } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) { |
177a7fab | 229 | map = fFieldMap[2]; |
84737f5e | 230 | } |
231 | ||
232 | if(map){ | |
e2afb3b6 | 233 | map->Field(x,b); |
84737f5e | 234 | } else { |
e2afb3b6 | 235 | //This is the ZDC part |
236 | Float_t rad2=x[0]*x[0]+x[1]*x[1]; | |
237 | if(x[2]>kCORBEG2 && x[2]<kCOREND2){ | |
177a7fab | 238 | if(rad2<kCOR2RA2){ |
239 | b[0] = kFCORN2; | |
240 | } | |
241 | } else if(x[2]>kZ1BEG && x[2]<kZ1END){ | |
242 | if(rad2<kZ1RA2){ | |
243 | b[0] = -kG1*x[1]; | |
244 | b[1] = -kG1*x[0]; | |
245 | } | |
246 | } else if(x[2]>kZ2BEG && x[2]<kZ2END){ | |
247 | if(rad2<kZ2RA2){ | |
248 | b[0] = kG1*x[1]; | |
249 | b[1] = kG1*x[0]; | |
250 | } | |
e2afb3b6 | 251 | } |
177a7fab | 252 | else if(x[2]>kZ3BEG && x[2]<kZ3END){ |
253 | if(rad2<kZ3RA2){ | |
254 | b[0] = kG1*x[1]; | |
255 | b[1] = kG1*x[0]; | |
256 | } | |
e2afb3b6 | 257 | } |
177a7fab | 258 | else if(x[2]>kZ4BEG && x[2]<kZ4END){ |
259 | if(rad2<kZ4RA2){ | |
260 | b[0] = -kG1*x[1]; | |
261 | b[1] = -kG1*x[0]; | |
262 | } | |
e2afb3b6 | 263 | } |
264 | else if(x[2]>kD1BEG && x[2]<kD1END){ | |
177a7fab | 265 | if(rad2<kD1RA2){ |
266 | b[1] = -kFDIP; | |
267 | } | |
e2afb3b6 | 268 | } |
269 | else if(x[2]>kD2BEG && x[2]<kD2END){ | |
177a7fab | 270 | if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2 |
271 | || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){ | |
272 | b[1] = kFDIP; | |
273 | } | |
e2afb3b6 | 274 | } |
84737f5e | 275 | } |
276 | if(fFactor!=1) { | |
e2afb3b6 | 277 | b[0]*=fFactor; |
278 | b[1]*=fFactor; | |
279 | b[2]*=fFactor; | |
84737f5e | 280 | } |
281 | } | |
282 | ||
e2afb3b6 | 283 | //_______________________________________________________________________ |
84737f5e | 284 | void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const |
285 | { | |
286 | // | |
287 | // Copy *this onto magf -- Not implemented | |
288 | // | |
289 | Fatal("Copy","Not implemented!\n"); | |
290 | } | |
291 | ||
e2afb3b6 | 292 | //_______________________________________________________________________ |
ee4f31cd | 293 | void AliMagFMaps::Streamer(TBuffer &R__b) |
294 | { | |
e2afb3b6 | 295 | // Stream an object of class AliMagFMaps. |
296 | if (R__b.IsReading()) { | |
297 | AliMagFMaps::Class()->ReadBuffer(R__b, this); | |
298 | fFieldRead = 0; | |
299 | } else { | |
300 | AliMagFMaps::Class()->WriteBuffer(R__b, this); | |
301 | } | |
ee4f31cd | 302 | } |