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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 | //_______________________________________________________________________ | |
d0f1ee3b | 48 | AliMagFMaps::AliMagFMaps(const char *name, const char *title, Int_t integ, |
49 | Float_t factor, Float_t fmax, Int_t map, | |
50 | 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) { | |
b6ee07d3 | 109 | fSolenoid = 2.; |
110 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root"); | |
111 | file = new TFile(fname); | |
112 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B02")); | |
113 | file->Close(); | |
114 | delete file; | |
177a7fab | 115 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root"); |
e2afb3b6 | 116 | file = new TFile(fname); |
177a7fab | 117 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB02")); |
118 | file->Close(); | |
119 | delete file;; | |
120 | ||
121 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root"); | |
122 | file = new TFile(fname); | |
123 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB02")); | |
e2afb3b6 | 124 | file->Close(); |
125 | delete file; | |
e2afb3b6 | 126 | } else if (fMap == k4kG) { |
b6ee07d3 | 127 | fSolenoid = 4.; |
128 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root"); | |
129 | file = new TFile(fname); | |
130 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B04")); | |
131 | file->Close(); | |
132 | delete file; | |
177a7fab | 133 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root"); |
e2afb3b6 | 134 | file = new TFile(fname); |
177a7fab | 135 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB04")); |
136 | file->Close(); | |
137 | delete file; | |
138 | ||
139 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root"); | |
140 | file = new TFile(fname); | |
141 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB04")); | |
e2afb3b6 | 142 | file->Close(); |
143 | delete file; | |
e2afb3b6 | 144 | } else if (fMap == k5kG) { |
b6ee07d3 | 145 | fSolenoid = 5.; |
146 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root"); | |
147 | file = new TFile(fname); | |
148 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B05")); | |
149 | file->Close(); | |
150 | delete file; | |
177a7fab | 151 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root"); |
e2afb3b6 | 152 | file = new TFile(fname); |
177a7fab | 153 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB05")); |
e2afb3b6 | 154 | file->Close(); |
155 | delete file; | |
177a7fab | 156 | |
157 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root"); | |
158 | file = new TFile(fname); | |
159 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB05")); | |
160 | file->Close(); | |
161 | delete file; | |
e2afb3b6 | 162 | } |
b6ee07d3 | 163 | |
164 | if (!fL3Option) fSolenoidUser = fSolenoid; | |
165 | ||
c2b548d6 | 166 | } |
167 | ||
e2afb3b6 | 168 | //_______________________________________________________________________ |
84737f5e | 169 | Float_t AliMagFMaps::SolenoidField() const |
170 | { | |
e2afb3b6 | 171 | // |
172 | // Returns max. L3 (solenoid) field strength | |
173 | // according to field map setting | |
174 | // | |
175 | return fSolenoid; | |
84737f5e | 176 | } |
177 | ||
e2afb3b6 | 178 | //_______________________________________________________________________ |
84737f5e | 179 | void AliMagFMaps::Field(Float_t *x, Float_t *b) |
180 | { | |
181 | // | |
182 | // Method to calculate the magnetic field | |
183 | // | |
84737f5e | 184 | // --- find the position in the grid --- |
185 | ||
57754f18 | 186 | |
187 | ||
188 | if (!fFieldRead) ReadField(); | |
189 | ||
190 | // | |
191 | // Field Maps have been calculated for the coordinate system in which | |
192 | // the Muon Spectrometer is placed at z > 0 | |
193 | // Transform coordinates corresponingly | |
194 | // | |
e2afb3b6 | 195 | |
84737f5e | 196 | b[0]=b[1]=b[2]=0; |
57754f18 | 197 | Float_t xm[3]; |
198 | xm[0] = - x[0]; | |
199 | xm[1] = x[1]; | |
200 | xm[2] = - x[2]; | |
201 | ||
84737f5e | 202 | AliFieldMap* map = 0; |
57754f18 | 203 | if (fFieldMap[0]->Inside(xm[0], xm[1], xm[2])) { |
177a7fab | 204 | map = fFieldMap[0]; |
b6ee07d3 | 205 | if (!fL3Option && TMath::Abs(xm[2]) < 370.) { |
e2afb3b6 | 206 | // |
b6ee07d3 | 207 | // Constant L3 field , if this option was selected |
e2afb3b6 | 208 | // |
b6ee07d3 | 209 | b[2] = - fSolenoid; |
84737f5e | 210 | return; |
b6ee07d3 | 211 | } |
57754f18 | 212 | } else if (fFieldMap[1]->Inside(xm[0], xm[1], xm[2])) { |
88cb7938 | 213 | map = fFieldMap[1]; |
57754f18 | 214 | } else if (fFieldMap[2]->Inside(xm[0], xm[1], xm[2])) { |
88cb7938 | 215 | map = fFieldMap[2]; |
84737f5e | 216 | } |
217 | ||
218 | if(map){ | |
57754f18 | 219 | map->Field(xm,b); |
220 | b[0] = - b[0]; | |
221 | b[2] = - b[2]; | |
222 | ||
84737f5e | 223 | } else { |
57754f18 | 224 | //This is the ZDC part |
225 | ZDCField(x, b); | |
84737f5e | 226 | } |
57754f18 | 227 | |
228 | ||
84737f5e | 229 | if(fFactor!=1) { |
57754f18 | 230 | b[0]*=fFactor; |
231 | b[1]*=fFactor; | |
232 | b[2]*=fFactor; | |
84737f5e | 233 | } |
234 | } | |
235 | ||
e2afb3b6 | 236 | //_______________________________________________________________________ |
6c4904c2 | 237 | void AliMagFMaps::Copy(TObject & /* magf */) const |
84737f5e | 238 | { |
239 | // | |
240 | // Copy *this onto magf -- Not implemented | |
241 | // | |
242 | Fatal("Copy","Not implemented!\n"); | |
243 | } | |
244 | ||
e2afb3b6 | 245 | //_______________________________________________________________________ |
ee4f31cd | 246 | void AliMagFMaps::Streamer(TBuffer &R__b) |
247 | { | |
e2afb3b6 | 248 | // Stream an object of class AliMagFMaps. |
249 | if (R__b.IsReading()) { | |
250 | AliMagFMaps::Class()->ReadBuffer(R__b, this); | |
251 | fFieldRead = 0; | |
252 | } else { | |
253 | AliMagFMaps::Class()->WriteBuffer(R__b, this); | |
254 | } | |
ee4f31cd | 255 | } |