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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 | ||
84737f5e | 32 | ClassImp(AliMagFMaps) |
33 | ||
e2afb3b6 | 34 | //_______________________________________________________________________ |
35 | AliMagFMaps::AliMagFMaps(): | |
36 | fSolenoid(0), | |
02b50693 | 37 | fSolenoidUser(0.), |
e2afb3b6 | 38 | fL3Option(0), |
39 | fFieldRead(0) | |
40 | { | |
41 | // | |
42 | // Default constructor | |
43 | // | |
44 | fFieldMap[0] = fFieldMap[1] = fFieldMap[2] = 0; | |
45 | } | |
46 | ||
47 | //_______________________________________________________________________ | |
84737f5e | 48 | AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ, |
e2afb3b6 | 49 | const Float_t factor, const Float_t fmax, const Int_t map, |
50 | const Int_t l3): | |
57754f18 | 51 | AliMagFC(name,title,integ,factor,fmax), |
e2afb3b6 | 52 | fSolenoid(0), |
02b50693 | 53 | fSolenoidUser(0), |
e2afb3b6 | 54 | fL3Option(l3), |
55 | fFieldRead(0) | |
84737f5e | 56 | { |
57 | // | |
58 | // Standard constructor | |
59 | // | |
60 | fType = kConMesh; | |
61 | fFieldMap[0] = 0; | |
c2b548d6 | 62 | fMap = map; |
63 | fL3Option = l3; | |
c2b548d6 | 64 | ReadField(); |
65 | fFieldRead = 1; | |
e2afb3b6 | 66 | // |
67 | // Don't replicate field information in gAlice | |
7b6cddfa | 68 | for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0); |
e2afb3b6 | 69 | // |
84737f5e | 70 | } |
71 | ||
e2afb3b6 | 72 | //_______________________________________________________________________ |
73 | AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf): | |
57754f18 | 74 | AliMagFC(magf), |
e2afb3b6 | 75 | fSolenoid(0), |
76 | fL3Option(0), | |
77 | fFieldRead(0) | |
84737f5e | 78 | { |
79 | // | |
80 | // Copy constructor | |
81 | // | |
82 | magf.Copy(*this); | |
83 | } | |
84 | ||
e2afb3b6 | 85 | //_______________________________________________________________________ |
84737f5e | 86 | AliMagFMaps::~AliMagFMaps() |
87 | { | |
e2afb3b6 | 88 | // |
89 | // Destructor | |
90 | // | |
91 | delete fFieldMap[0]; | |
92 | delete fFieldMap[1]; | |
93 | delete fFieldMap[2]; | |
84737f5e | 94 | } |
95 | ||
e2afb3b6 | 96 | //_______________________________________________________________________ |
c2b548d6 | 97 | void AliMagFMaps::ReadField() |
98 | { | |
e2afb3b6 | 99 | // Read Field Map from file |
100 | // | |
101 | // don't read twice | |
102 | // | |
103 | if (fFieldRead) return; | |
104 | fFieldRead = 1; | |
105 | // | |
106 | char* fname; | |
107 | TFile* file = 0; | |
108 | if (fMap == k2kG) { | |
177a7fab | 109 | if (fL3Option) { |
110 | fSolenoid = 2.; | |
111 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root"); | |
112 | file = new TFile(fname); | |
113 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B02")); | |
114 | file->Close(); | |
115 | delete file; | |
116 | } | |
117 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root"); | |
e2afb3b6 | 118 | file = new TFile(fname); |
177a7fab | 119 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB02")); |
120 | file->Close(); | |
121 | delete file;; | |
122 | ||
123 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root"); | |
124 | file = new TFile(fname); | |
125 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB02")); | |
e2afb3b6 | 126 | file->Close(); |
127 | delete file; | |
e2afb3b6 | 128 | } else if (fMap == k4kG) { |
177a7fab | 129 | if (fL3Option) { |
130 | fSolenoid = 4.; | |
131 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root"); | |
132 | file = new TFile(fname); | |
133 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B04")); | |
134 | file->Close(); | |
135 | delete file; | |
136 | } | |
137 | ||
138 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root"); | |
e2afb3b6 | 139 | file = new TFile(fname); |
177a7fab | 140 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB04")); |
141 | file->Close(); | |
142 | delete file; | |
143 | ||
144 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root"); | |
145 | file = new TFile(fname); | |
146 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB04")); | |
e2afb3b6 | 147 | file->Close(); |
148 | delete file; | |
e2afb3b6 | 149 | } else if (fMap == k5kG) { |
177a7fab | 150 | if (fL3Option) { |
151 | fSolenoid = 5.; | |
152 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root"); | |
153 | file = new TFile(fname); | |
154 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B05")); | |
155 | file->Close(); | |
156 | delete file; | |
157 | } | |
158 | ||
159 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root"); | |
e2afb3b6 | 160 | file = new TFile(fname); |
177a7fab | 161 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB05")); |
e2afb3b6 | 162 | file->Close(); |
163 | delete file; | |
177a7fab | 164 | |
165 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root"); | |
166 | file = new TFile(fname); | |
167 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB05")); | |
168 | file->Close(); | |
169 | delete file; | |
170 | ||
e2afb3b6 | 171 | } |
172 | ||
173 | if (!fL3Option) { | |
177a7fab | 174 | // |
175 | // Dummy L3 map | |
176 | fFieldMap[0] = new AliFieldMap(); | |
177 | fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.); | |
178 | switch(fMap) { | |
179 | case k2kG: | |
180 | fSolenoid = 2.; | |
181 | break; | |
182 | case k4kG: | |
183 | fSolenoid = 4.; | |
184 | break; | |
185 | case k5kG: | |
186 | fSolenoid = 5.; | |
187 | break; | |
177a7fab | 188 | } |
02b50693 | 189 | fSolenoidUser = fSolenoid; |
e2afb3b6 | 190 | } |
c2b548d6 | 191 | } |
192 | ||
e2afb3b6 | 193 | //_______________________________________________________________________ |
84737f5e | 194 | Float_t AliMagFMaps::SolenoidField() const |
195 | { | |
e2afb3b6 | 196 | // |
197 | // Returns max. L3 (solenoid) field strength | |
198 | // according to field map setting | |
199 | // | |
200 | return fSolenoid; | |
84737f5e | 201 | } |
202 | ||
e2afb3b6 | 203 | //_______________________________________________________________________ |
84737f5e | 204 | void AliMagFMaps::Field(Float_t *x, Float_t *b) |
205 | { | |
206 | // | |
207 | // Method to calculate the magnetic field | |
208 | // | |
84737f5e | 209 | // --- find the position in the grid --- |
210 | ||
57754f18 | 211 | |
212 | ||
213 | if (!fFieldRead) ReadField(); | |
214 | ||
215 | // | |
216 | // Field Maps have been calculated for the coordinate system in which | |
217 | // the Muon Spectrometer is placed at z > 0 | |
218 | // Transform coordinates corresponingly | |
219 | // | |
e2afb3b6 | 220 | |
84737f5e | 221 | b[0]=b[1]=b[2]=0; |
57754f18 | 222 | Float_t xm[3]; |
223 | xm[0] = - x[0]; | |
224 | xm[1] = x[1]; | |
225 | xm[2] = - x[2]; | |
226 | ||
84737f5e | 227 | AliFieldMap* map = 0; |
57754f18 | 228 | if (fFieldMap[0]->Inside(xm[0], xm[1], xm[2])) { |
177a7fab | 229 | map = fFieldMap[0]; |
230 | if (!fL3Option) { | |
e2afb3b6 | 231 | // |
232 | // Constant L3 field, if this option was selected | |
233 | // | |
02b50693 | 234 | b[2] = fSolenoidUser; |
84737f5e | 235 | return; |
e2afb3b6 | 236 | } |
57754f18 | 237 | } else if (fFieldMap[1]->Inside(xm[0], xm[1], xm[2])) { |
88cb7938 | 238 | map = fFieldMap[1]; |
57754f18 | 239 | } else if (fFieldMap[2]->Inside(xm[0], xm[1], xm[2])) { |
88cb7938 | 240 | map = fFieldMap[2]; |
84737f5e | 241 | } |
242 | ||
243 | if(map){ | |
57754f18 | 244 | map->Field(xm,b); |
245 | b[0] = - b[0]; | |
246 | b[2] = - b[2]; | |
247 | ||
84737f5e | 248 | } else { |
57754f18 | 249 | //This is the ZDC part |
250 | ZDCField(x, b); | |
84737f5e | 251 | } |
57754f18 | 252 | |
253 | ||
84737f5e | 254 | if(fFactor!=1) { |
57754f18 | 255 | b[0]*=fFactor; |
256 | b[1]*=fFactor; | |
257 | b[2]*=fFactor; | |
84737f5e | 258 | } |
259 | } | |
260 | ||
e2afb3b6 | 261 | //_______________________________________________________________________ |
84737f5e | 262 | void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const |
263 | { | |
264 | // | |
265 | // Copy *this onto magf -- Not implemented | |
266 | // | |
267 | Fatal("Copy","Not implemented!\n"); | |
268 | } | |
269 | ||
e2afb3b6 | 270 | //_______________________________________________________________________ |
ee4f31cd | 271 | void AliMagFMaps::Streamer(TBuffer &R__b) |
272 | { | |
e2afb3b6 | 273 | // Stream an object of class AliMagFMaps. |
274 | if (R__b.IsReading()) { | |
275 | AliMagFMaps::Class()->ReadBuffer(R__b, this); | |
276 | fFieldRead = 0; | |
277 | } else { | |
278 | AliMagFMaps::Class()->WriteBuffer(R__b, this); | |
279 | } | |
ee4f31cd | 280 | } |