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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> | |
e2afb3b6 | 27 | |
84737f5e | 28 | #include "AliFieldMap.h" |
29 | #include "AliMagFMaps.h" | |
30 | ||
84737f5e | 31 | ClassImp(AliMagFMaps) |
a0201063 | 32 | |
84737f5e | 33 | |
e2afb3b6 | 34 | //_______________________________________________________________________ |
35 | AliMagFMaps::AliMagFMaps(): | |
36 | fSolenoid(0), | |
02b50693 | 37 | fSolenoidUser(0.), |
a0201063 | 38 | fL3Option(0) |
e2afb3b6 | 39 | { |
40 | // | |
41 | // Default constructor | |
42 | // | |
10eca208 | 43 | // |
44 | // Don't replicate field information in gAlice | |
e2afb3b6 | 45 | fFieldMap[0] = fFieldMap[1] = fFieldMap[2] = 0; |
46 | } | |
47 | ||
48 | //_______________________________________________________________________ | |
d0f1ee3b | 49 | AliMagFMaps::AliMagFMaps(const char *name, const char *title, Int_t integ, |
50 | Float_t factor, Float_t fmax, Int_t map, | |
51 | Int_t l3): | |
57754f18 | 52 | AliMagFC(name,title,integ,factor,fmax), |
e2afb3b6 | 53 | fSolenoid(0), |
02b50693 | 54 | fSolenoidUser(0), |
a0201063 | 55 | fL3Option(l3) |
84737f5e | 56 | { |
57 | // | |
58 | // Standard constructor | |
59 | // | |
60 | fType = kConMesh; | |
61 | fFieldMap[0] = 0; | |
c2b548d6 | 62 | fMap = map; |
63 | fL3Option = l3; | |
c2b548d6 | 64 | ReadField(); |
e2afb3b6 | 65 | // |
66 | // Don't replicate field information in gAlice | |
7b6cddfa | 67 | for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0); |
e2afb3b6 | 68 | // |
84737f5e | 69 | } |
70 | ||
e2afb3b6 | 71 | //_______________________________________________________________________ |
72 | AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf): | |
57754f18 | 73 | AliMagFC(magf), |
e2afb3b6 | 74 | fSolenoid(0), |
a0201063 | 75 | fL3Option(0) |
84737f5e | 76 | { |
77 | // | |
78 | // Copy constructor | |
79 | // | |
80 | magf.Copy(*this); | |
81 | } | |
82 | ||
e2afb3b6 | 83 | //_______________________________________________________________________ |
84737f5e | 84 | AliMagFMaps::~AliMagFMaps() |
85 | { | |
e2afb3b6 | 86 | // |
87 | // Destructor | |
88 | // | |
89 | delete fFieldMap[0]; | |
90 | delete fFieldMap[1]; | |
91 | delete fFieldMap[2]; | |
84737f5e | 92 | } |
93 | ||
e2afb3b6 | 94 | //_______________________________________________________________________ |
c2b548d6 | 95 | void AliMagFMaps::ReadField() |
96 | { | |
e2afb3b6 | 97 | // Read Field Map from file |
98 | // | |
99 | // don't read twice | |
100 | // | |
a0201063 | 101 | if (!fgReadField) return; |
102 | fgReadField = 0; | |
e2afb3b6 | 103 | // |
104 | char* fname; | |
105 | TFile* file = 0; | |
106 | if (fMap == k2kG) { | |
b6ee07d3 | 107 | fSolenoid = 2.; |
108 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root"); | |
109 | file = new TFile(fname); | |
110 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B02")); | |
111 | file->Close(); | |
112 | delete file; | |
177a7fab | 113 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root"); |
e2afb3b6 | 114 | file = new TFile(fname); |
177a7fab | 115 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB02")); |
116 | file->Close(); | |
117 | delete file;; | |
118 | ||
119 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root"); | |
120 | file = new TFile(fname); | |
121 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB02")); | |
e2afb3b6 | 122 | file->Close(); |
123 | delete file; | |
e2afb3b6 | 124 | } else if (fMap == k4kG) { |
b6ee07d3 | 125 | fSolenoid = 4.; |
126 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root"); | |
127 | file = new TFile(fname); | |
128 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B04")); | |
129 | file->Close(); | |
130 | delete file; | |
177a7fab | 131 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root"); |
e2afb3b6 | 132 | file = new TFile(fname); |
177a7fab | 133 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB04")); |
134 | file->Close(); | |
135 | delete file; | |
136 | ||
137 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root"); | |
138 | file = new TFile(fname); | |
139 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB04")); | |
e2afb3b6 | 140 | file->Close(); |
141 | delete file; | |
e2afb3b6 | 142 | } else if (fMap == k5kG) { |
b6ee07d3 | 143 | fSolenoid = 5.; |
144 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root"); | |
145 | file = new TFile(fname); | |
146 | fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B05")); | |
147 | file->Close(); | |
148 | delete file; | |
177a7fab | 149 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root"); |
e2afb3b6 | 150 | file = new TFile(fname); |
177a7fab | 151 | fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB05")); |
e2afb3b6 | 152 | file->Close(); |
153 | delete file; | |
177a7fab | 154 | |
155 | fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root"); | |
156 | file = new TFile(fname); | |
157 | fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB05")); | |
158 | file->Close(); | |
159 | delete file; | |
e2afb3b6 | 160 | } |
b6ee07d3 | 161 | |
162 | if (!fL3Option) fSolenoidUser = fSolenoid; | |
163 | ||
c2b548d6 | 164 | } |
165 | ||
e2afb3b6 | 166 | //_______________________________________________________________________ |
84737f5e | 167 | Float_t AliMagFMaps::SolenoidField() const |
168 | { | |
e2afb3b6 | 169 | // |
170 | // Returns max. L3 (solenoid) field strength | |
171 | // according to field map setting | |
172 | // | |
173 | return fSolenoid; | |
84737f5e | 174 | } |
175 | ||
e2afb3b6 | 176 | //_______________________________________________________________________ |
6f3038e9 | 177 | void AliMagFMaps::Field(Float_t *x, Float_t *b) const |
84737f5e | 178 | { |
179 | // | |
180 | // Method to calculate the magnetic field | |
181 | // | |
84737f5e | 182 | // --- find the position in the grid --- |
183 | ||
57754f18 | 184 | |
185 | ||
6f3038e9 | 186 | // if (!fFieldRead) ReadField(); |
57754f18 | 187 | |
188 | // | |
189 | // Field Maps have been calculated for the coordinate system in which | |
190 | // the Muon Spectrometer is placed at z > 0 | |
191 | // Transform coordinates corresponingly | |
192 | // | |
e2afb3b6 | 193 | |
84737f5e | 194 | b[0]=b[1]=b[2]=0; |
57754f18 | 195 | Float_t xm[3]; |
196 | xm[0] = - x[0]; | |
197 | xm[1] = x[1]; | |
198 | xm[2] = - x[2]; | |
199 | ||
84737f5e | 200 | AliFieldMap* map = 0; |
57754f18 | 201 | if (fFieldMap[0]->Inside(xm[0], xm[1], xm[2])) { |
177a7fab | 202 | map = fFieldMap[0]; |
0ae44e30 | 203 | Float_t r = TMath::Sqrt(xm[0] * xm[0] + xm[1] * xm[1]); |
204 | ||
205 | if (!fL3Option && TMath::Abs(xm[2]) < 370. && r < 550.) { | |
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); | |
10eca208 | 251 | ReadField(); |
e2afb3b6 | 252 | } else { |
253 | AliMagFMaps::Class()->WriteBuffer(R__b, this); | |
254 | } | |
ee4f31cd | 255 | } |