1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //------------------------------------------------------------------------
19 // Magnetic field composed by 3 maps: the L3 magnet, extended region, and
21 // Used in the configuration macros (macros/Config.C, etc.)
22 // Author: Andreas Morsch <andreas.morsch@cern.ch>
23 //------------------------------------------------------------------------
29 #include "AliFieldMap.h"
30 #include "AliMagFMaps.h"
35 //_______________________________________________________________________
36 AliMagFMaps::AliMagFMaps():
42 // Default constructor
44 fFieldMap[0] = fFieldMap[1] = fFieldMap[2] = 0;
47 //_______________________________________________________________________
48 AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ,
49 const Float_t factor, const Float_t fmax, const Int_t map,
51 AliMagF(name,title,integ,factor,fmax),
57 // Standard constructor
67 // Don't replicate field information in gAlice
68 for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0);
72 //_______________________________________________________________________
73 AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf):
85 //_______________________________________________________________________
86 AliMagFMaps::~AliMagFMaps()
96 //_______________________________________________________________________
97 void AliMagFMaps::ReadField()
99 // Read Field Map from file
103 if (fFieldRead) return;
110 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root");
111 file = new TFile(fname);
112 fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B02"));
116 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root");
117 file = new TFile(fname);
118 fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB02"));
122 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root");
123 file = new TFile(fname);
124 fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB02"));
128 } else if (fMap == k4kG) {
130 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root");
131 file = new TFile(fname);
132 fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B04"));
137 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root");
138 file = new TFile(fname);
139 fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB04"));
143 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root");
144 file = new TFile(fname);
145 fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB04"));
149 } else if (fMap == k5kG) {
151 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root");
152 file = new TFile(fname);
153 fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B05"));
158 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root");
159 file = new TFile(fname);
160 fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB05"));
164 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root");
165 file = new TFile(fname);
166 fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB05"));
176 fFieldMap[0] = new AliFieldMap();
177 fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.);
181 //_______________________________________________________________________
182 Float_t AliMagFMaps::SolenoidField() const
185 // Returns max. L3 (solenoid) field strength
186 // according to field map setting
191 //_______________________________________________________________________
192 void AliMagFMaps::Field(Float_t *x, Float_t *b)
195 // Method to calculate the magnetic field
197 // --- find the position in the grid ---
199 if (!fFieldRead) ReadField();
202 AliFieldMap* map = 0;
203 if (fFieldMap[0]->Inside(x[0], x[1], x[2])) {
207 // Constant L3 field, if this option was selected
212 } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) {
214 } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) {
221 //This is the ZDC part
222 Float_t rad2=x[0]*x[0]+x[1]*x[1];
223 if(x[2]>kCORBEG2 && x[2]<kCOREND2){
228 else if(x[2]>kZ1BEG && x[2]<kZ1END){
234 else if(x[2]>kZ2BEG && x[2]<kZ2END){
240 else if(x[2]>kZ3BEG && x[2]<kZ3END){
246 else if(x[2]>kZ4BEG && x[2]<kZ4END){
252 else if(x[2]>kD1BEG && x[2]<kD1END){
257 else if(x[2]>kD2BEG && x[2]<kD2END){
258 if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
259 || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
271 //_______________________________________________________________________
272 void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const
275 // Copy *this onto magf -- Not implemented
277 Fatal("Copy","Not implemented!\n");
280 //_______________________________________________________________________
281 void AliMagFMaps::Streamer(TBuffer &R__b)
283 // Stream an object of class AliMagFMaps.
284 if (R__b.IsReading()) {
285 AliMagFMaps::Class()->ReadBuffer(R__b, this);
288 AliMagFMaps::Class()->WriteBuffer(R__b, this);