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 Revision 1.5 2002/02/26 09:48:14 morsch
19 Extra argument in constructor for l3 map choice.
21 Revision 1.4 2002/02/22 14:00:20 morsch
22 Protection against replication of fieldmap data in gAlice.
24 Revision 1.3 2002/02/21 09:23:41 morsch
25 Create dummy field map for L3 in case no detailed map is needed.
27 Revision 1.2 2002/02/19 16:14:35 morsch
28 Reading of 0.2 T solenoid field map enabled.
30 Revision 1.1 2002/02/14 11:41:28 morsch
31 Magnetic field map for ALICE for L3+muon spectrometer stored in 3 seperate
37 // Author: Andreas Morsch <andreas.morsch@cern.ch>
42 #include "AliFieldMap.h"
43 #include "AliMagFMaps.h"
48 //________________________________________
49 AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ,
50 const Float_t factor, const Float_t fmax, const Int_t map,
52 : AliMagF(name,title,integ,factor,fmax)
55 // Standard constructor
65 // Don't replicate field information in gAlice
66 for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0);
71 //________________________________________
72 AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf)
80 AliMagFMaps::~AliMagFMaps()
90 void AliMagFMaps::ReadField()
92 // Read Field Map from file
96 if (fFieldRead) return;
102 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root");
103 file = new TFile(fname);
104 fFieldMap[0] = (AliFieldMap*) file->Get("L3B02");
108 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root");
109 file = new TFile(fname);
110 fFieldMap[1] = (AliFieldMap*) file->Get("DipB02");
114 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root");
115 file = new TFile(fname);
116 fFieldMap[2] = (AliFieldMap*) file->Get("ExtB02");
120 } else if (fMap == k4kG) {
122 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root");
123 file = new TFile(fname);
124 fFieldMap[0] = (AliFieldMap*) file->Get("L3B04");
129 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root");
130 file = new TFile(fname);
131 fFieldMap[1] = (AliFieldMap*) file->Get("DipB04");
135 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root");
136 file = new TFile(fname);
137 fFieldMap[2] = (AliFieldMap*) file->Get("ExtB04");
141 } else if (fMap == k5kG) {
143 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root");
144 file = new TFile(fname);
145 fFieldMap[0] = (AliFieldMap*) file->Get("L3B05");
150 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root");
151 file = new TFile(fname);
152 fFieldMap[1] = (AliFieldMap*) file->Get("DipB05");
156 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root");
157 file = new TFile(fname);
158 fFieldMap[2] = (AliFieldMap*) file->Get("ExtB05");
168 fFieldMap[0] = new AliFieldMap();
169 fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.);
174 Float_t AliMagFMaps::SolenoidField() const
177 // Returns max. L3 (solenoid) field strength
178 // according to field map setting
185 //________________________________________
186 void AliMagFMaps::Field(Float_t *x, Float_t *b)
189 // Method to calculate the magnetic field
191 // --- find the position in the grid ---
194 AliFieldMap* map = 0;
195 if (fFieldMap[0]->Inside(x[0], x[1], x[2])) {
199 // Constant L3 field, if this option was selected
204 } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) {
206 } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) {
213 //This is the ZDC part
214 Float_t rad2=x[0]*x[0]+x[1]*x[1];
215 if(x[2]>kCORBEG2 && x[2]<kCOREND2){
220 else if(x[2]>kZ1BEG && x[2]<kZ1END){
226 else if(x[2]>kZ2BEG && x[2]<kZ2END){
232 else if(x[2]>kZ3BEG && x[2]<kZ3END){
238 else if(x[2]>kZ4BEG && x[2]<kZ4END){
244 else if(x[2]>kD1BEG && x[2]<kD1END){
249 else if(x[2]>kD2BEG && x[2]<kD2END){
250 if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
251 || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
265 //________________________________________
266 void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const
269 // Copy *this onto magf -- Not implemented
271 Fatal("Copy","Not implemented!\n");
274 //________________________________________
275 AliMagFMaps & AliMagFMaps::operator =(const AliMagFMaps &magf)