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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 | ||
16 | /* | |
17 | $Log$ | |
b9d0a01d | 18 | Revision 1.5.6.2 2002/08/01 15:35:30 alibrary |
19 | Updating VirtualMC | |
20 | ||
21 | Revision 1.7 2002/08/01 12:34:48 morsch | |
22 | Initialize maps in first call to Field() after streaming in. | |
23 | ||
ee4f31cd | 24 | Revision 1.6 2002/04/11 11:17:48 morsch |
25 | ReadField() used in Constructor. | |
26 | ||
c2b548d6 | 27 | Revision 1.5 2002/02/26 09:48:14 morsch |
28 | Extra argument in constructor for l3 map choice. | |
29 | ||
356f9803 | 30 | Revision 1.4 2002/02/22 14:00:20 morsch |
31 | Protection against replication of fieldmap data in gAlice. | |
32 | ||
7b6cddfa | 33 | Revision 1.3 2002/02/21 09:23:41 morsch |
34 | Create dummy field map for L3 in case no detailed map is needed. | |
35 | ||
7a1ab119 | 36 | Revision 1.2 2002/02/19 16:14:35 morsch |
37 | Reading of 0.2 T solenoid field map enabled. | |
38 | ||
bfd6c805 | 39 | Revision 1.1 2002/02/14 11:41:28 morsch |
40 | Magnetic field map for ALICE for L3+muon spectrometer stored in 3 seperate | |
41 | root files. | |
42 | ||
84737f5e | 43 | */ |
44 | ||
45 | // | |
46 | // Author: Andreas Morsch <andreas.morsch@cern.ch> | |
47 | // | |
48 | ||
49 | #include <TFile.h> | |
50 | #include <TSystem.h> | |
51 | #include "AliFieldMap.h" | |
52 | #include "AliMagFMaps.h" | |
53 | ||
54 | ||
55 | ClassImp(AliMagFMaps) | |
56 | ||
57 | //________________________________________ | |
58 | AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ, | |
356f9803 | 59 | const Float_t factor, const Float_t fmax, const Int_t map, |
60 | const Int_t l3) | |
84737f5e | 61 | : AliMagF(name,title,integ,factor,fmax) |
62 | { | |
63 | // | |
64 | // Standard constructor | |
65 | // | |
66 | fType = kConMesh; | |
67 | fFieldMap[0] = 0; | |
c2b548d6 | 68 | fMap = map; |
69 | fL3Option = l3; | |
70 | ||
71 | ReadField(); | |
72 | fFieldRead = 1; | |
7b6cddfa | 73 | // |
74 | // Don't replicate field information in gAlice | |
75 | for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0); | |
76 | // | |
c2b548d6 | 77 | |
84737f5e | 78 | } |
79 | ||
80 | //________________________________________ | |
81 | AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf) | |
82 | { | |
83 | // | |
84 | // Copy constructor | |
85 | // | |
86 | magf.Copy(*this); | |
87 | } | |
88 | ||
89 | AliMagFMaps::~AliMagFMaps() | |
90 | { | |
91 | // | |
92 | // Destructor | |
93 | // | |
94 | delete fFieldMap[0]; | |
95 | delete fFieldMap[1]; | |
96 | delete fFieldMap[2]; | |
97 | } | |
98 | ||
c2b548d6 | 99 | void AliMagFMaps::ReadField() |
100 | { | |
101 | // Read Field Map from file | |
102 | // | |
103 | // don't read twice | |
104 | // | |
105 | if (fFieldRead) return; | |
ee4f31cd | 106 | fFieldRead = 1; |
c2b548d6 | 107 | // |
108 | char* fname; | |
109 | TFile* file = 0; | |
110 | if (fMap == k2kG) { | |
111 | if (fL3Option) { | |
112 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root"); | |
113 | file = new TFile(fname); | |
114 | fFieldMap[0] = (AliFieldMap*) file->Get("L3B02"); | |
115 | file->Close(); | |
116 | delete file; | |
117 | } | |
118 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root"); | |
119 | file = new TFile(fname); | |
120 | fFieldMap[1] = (AliFieldMap*) file->Get("DipB02"); | |
121 | file->Close(); | |
122 | delete file;; | |
123 | ||
124 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root"); | |
125 | file = new TFile(fname); | |
126 | fFieldMap[2] = (AliFieldMap*) file->Get("ExtB02"); | |
127 | file->Close(); | |
128 | delete file; | |
129 | fSolenoid = 2.; | |
130 | } else if (fMap == k4kG) { | |
131 | if (fL3Option) { | |
132 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root"); | |
133 | file = new TFile(fname); | |
134 | fFieldMap[0] = (AliFieldMap*) file->Get("L3B04"); | |
135 | file->Close(); | |
136 | delete file; | |
137 | } | |
138 | ||
139 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root"); | |
140 | file = new TFile(fname); | |
141 | fFieldMap[1] = (AliFieldMap*) file->Get("DipB04"); | |
142 | file->Close(); | |
143 | delete file;; | |
144 | ||
145 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root"); | |
146 | file = new TFile(fname); | |
147 | fFieldMap[2] = (AliFieldMap*) file->Get("ExtB04"); | |
148 | file->Close(); | |
149 | delete file; | |
150 | fSolenoid = 4.; | |
151 | } else if (fMap == k5kG) { | |
152 | if (fL3Option) { | |
153 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root"); | |
154 | file = new TFile(fname); | |
155 | fFieldMap[0] = (AliFieldMap*) file->Get("L3B05"); | |
156 | file->Close(); | |
157 | delete file; | |
158 | } | |
159 | ||
160 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root"); | |
161 | file = new TFile(fname); | |
162 | fFieldMap[1] = (AliFieldMap*) file->Get("DipB05"); | |
163 | file->Close(); | |
164 | delete file;; | |
165 | ||
166 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root"); | |
167 | file = new TFile(fname); | |
168 | fFieldMap[2] = (AliFieldMap*) file->Get("ExtB05"); | |
169 | file->Close(); | |
170 | delete file; | |
171 | ||
172 | fSolenoid = 5.; | |
173 | } | |
174 | ||
175 | if (!fL3Option) { | |
176 | // | |
177 | // Dummy L3 map | |
178 | fFieldMap[0] = new AliFieldMap(); | |
179 | fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.); | |
180 | } | |
181 | } | |
182 | ||
84737f5e | 183 | |
184 | Float_t AliMagFMaps::SolenoidField() const | |
185 | { | |
186 | // | |
187 | // Returns max. L3 (solenoid) field strength | |
188 | // according to field map setting | |
189 | ||
190 | return fSolenoid; | |
191 | } | |
192 | ||
193 | ||
194 | ||
195 | //________________________________________ | |
196 | void AliMagFMaps::Field(Float_t *x, Float_t *b) | |
197 | { | |
198 | // | |
199 | // Method to calculate the magnetic field | |
200 | // | |
84737f5e | 201 | // --- find the position in the grid --- |
202 | ||
ee4f31cd | 203 | if (!fFieldRead) ReadField(); |
204 | ||
84737f5e | 205 | b[0]=b[1]=b[2]=0; |
206 | AliFieldMap* map = 0; | |
84737f5e | 207 | if (fFieldMap[0]->Inside(x[0], x[1], x[2])) { |
208 | map = fFieldMap[0]; | |
356f9803 | 209 | if (!fL3Option) { |
84737f5e | 210 | // |
211 | // Constant L3 field, if this option was selected | |
212 | // | |
213 | b[2] = fSolenoid; | |
214 | return; | |
215 | } | |
216 | } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) { | |
217 | map = fFieldMap[1]; | |
218 | } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) { | |
219 | map = fFieldMap[2]; | |
220 | } | |
221 | ||
222 | if(map){ | |
223 | map->Field(x,b); | |
224 | } else { | |
225 | //This is the ZDC part | |
226 | Float_t rad2=x[0]*x[0]+x[1]*x[1]; | |
227 | if(x[2]>kCORBEG2 && x[2]<kCOREND2){ | |
228 | if(rad2<kCOR2RA2){ | |
229 | b[0] = kFCORN2; | |
230 | } | |
231 | } | |
232 | else if(x[2]>kZ1BEG && x[2]<kZ1END){ | |
233 | if(rad2<kZ1RA2){ | |
234 | b[0] = -kG1*x[1]; | |
235 | b[1] = -kG1*x[0]; | |
236 | } | |
237 | } | |
238 | else if(x[2]>kZ2BEG && x[2]<kZ2END){ | |
239 | if(rad2<kZ2RA2){ | |
240 | b[0] = kG1*x[1]; | |
241 | b[1] = kG1*x[0]; | |
242 | } | |
243 | } | |
244 | else if(x[2]>kZ3BEG && x[2]<kZ3END){ | |
245 | if(rad2<kZ3RA2){ | |
246 | b[0] = kG1*x[1]; | |
247 | b[1] = kG1*x[0]; | |
248 | } | |
249 | } | |
250 | else if(x[2]>kZ4BEG && x[2]<kZ4END){ | |
251 | if(rad2<kZ4RA2){ | |
252 | b[0] = -kG1*x[1]; | |
253 | b[1] = -kG1*x[0]; | |
254 | } | |
255 | } | |
256 | else if(x[2]>kD1BEG && x[2]<kD1END){ | |
257 | if(rad2<kD1RA2){ | |
258 | b[1] = -kFDIP; | |
259 | } | |
260 | } | |
261 | else if(x[2]>kD2BEG && x[2]<kD2END){ | |
262 | if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2 | |
263 | || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){ | |
264 | b[1] = kFDIP; | |
265 | } | |
266 | } | |
267 | } | |
268 | if(fFactor!=1) { | |
269 | b[0]*=fFactor; | |
270 | b[1]*=fFactor; | |
271 | b[2]*=fFactor; | |
272 | } | |
273 | } | |
274 | ||
275 | //________________________________________ | |
276 | void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const | |
277 | { | |
278 | // | |
279 | // Copy *this onto magf -- Not implemented | |
280 | // | |
281 | Fatal("Copy","Not implemented!\n"); | |
282 | } | |
283 | ||
284 | //________________________________________ | |
285 | AliMagFMaps & AliMagFMaps::operator =(const AliMagFMaps &magf) | |
286 | { | |
287 | magf.Copy(*this); | |
288 | return *this; | |
289 | } | |
ee4f31cd | 290 | |
291 | void AliMagFMaps::Streamer(TBuffer &R__b) | |
292 | { | |
293 | // Stream an object of class AliMagFMaps. | |
294 | if (R__b.IsReading()) { | |
295 | AliMagFMaps::Class()->ReadBuffer(R__b, this); | |
296 | fFieldRead = 0; | |
297 | } else { | |
298 | AliMagFMaps::Class()->WriteBuffer(R__b, this); | |
299 | } | |
300 | } |