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 1.6 2002/04/11 11:17:48 morsch
19 ReadField() used in Constructor.
21 Revision 1.5 2002/02/26 09:48:14 morsch
22 Extra argument in constructor for l3 map choice.
24 Revision 1.4 2002/02/22 14:00:20 morsch
25 Protection against replication of fieldmap data in gAlice.
27 Revision 1.3 2002/02/21 09:23:41 morsch
28 Create dummy field map for L3 in case no detailed map is needed.
30 Revision 1.2 2002/02/19 16:14:35 morsch
31 Reading of 0.2 T solenoid field map enabled.
33 Revision 1.1 2002/02/14 11:41:28 morsch
34 Magnetic field map for ALICE for L3+muon spectrometer stored in 3 seperate
40 // Author: Andreas Morsch <andreas.morsch@cern.ch>
45 #include "AliFieldMap.h"
46 #include "AliMagFMaps.h"
51 //________________________________________
52 AliMagFMaps::AliMagFMaps(const char *name, const char *title, const Int_t integ,
53 const Float_t factor, const Float_t fmax, const Int_t map,
55 : AliMagF(name,title,integ,factor,fmax)
58 // Standard constructor
68 // Don't replicate field information in gAlice
69 for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0);
74 //________________________________________
75 AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf)
83 AliMagFMaps::~AliMagFMaps()
93 void AliMagFMaps::ReadField()
95 // Read Field Map from file
99 if (fFieldRead) return;
106 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root");
107 file = new TFile(fname);
108 fFieldMap[0] = (AliFieldMap*) file->Get("L3B02");
112 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root");
113 file = new TFile(fname);
114 fFieldMap[1] = (AliFieldMap*) file->Get("DipB02");
118 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root");
119 file = new TFile(fname);
120 fFieldMap[2] = (AliFieldMap*) file->Get("ExtB02");
124 } else if (fMap == k4kG) {
126 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root");
127 file = new TFile(fname);
128 fFieldMap[0] = (AliFieldMap*) file->Get("L3B04");
133 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root");
134 file = new TFile(fname);
135 fFieldMap[1] = (AliFieldMap*) file->Get("DipB04");
139 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root");
140 file = new TFile(fname);
141 fFieldMap[2] = (AliFieldMap*) file->Get("ExtB04");
145 } else if (fMap == k5kG) {
147 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root");
148 file = new TFile(fname);
149 fFieldMap[0] = (AliFieldMap*) file->Get("L3B05");
154 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root");
155 file = new TFile(fname);
156 fFieldMap[1] = (AliFieldMap*) file->Get("DipB05");
160 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root");
161 file = new TFile(fname);
162 fFieldMap[2] = (AliFieldMap*) file->Get("ExtB05");
172 fFieldMap[0] = new AliFieldMap();
173 fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.);
178 Float_t AliMagFMaps::SolenoidField() const
181 // Returns max. L3 (solenoid) field strength
182 // according to field map setting
189 //________________________________________
190 void AliMagFMaps::Field(Float_t *x, Float_t *b)
193 // Method to calculate the magnetic field
195 // --- find the position in the grid ---
197 if (!fFieldRead) ReadField();
200 AliFieldMap* map = 0;
201 if (fFieldMap[0]->Inside(x[0], x[1], x[2])) {
205 // Constant L3 field, if this option was selected
210 } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) {
212 } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) {
219 //This is the ZDC part
220 Float_t rad2=x[0]*x[0]+x[1]*x[1];
221 if(x[2]>kCORBEG2 && x[2]<kCOREND2){
226 else if(x[2]>kZ1BEG && x[2]<kZ1END){
232 else if(x[2]>kZ2BEG && x[2]<kZ2END){
238 else if(x[2]>kZ3BEG && x[2]<kZ3END){
244 else if(x[2]>kZ4BEG && x[2]<kZ4END){
250 else if(x[2]>kD1BEG && x[2]<kD1END){
255 else if(x[2]>kD2BEG && x[2]<kD2END){
256 if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
257 || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
269 //________________________________________
270 void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const
273 // Copy *this onto magf -- Not implemented
275 Fatal("Copy","Not implemented!\n");
278 //________________________________________
279 AliMagFMaps & AliMagFMaps::operator =(const AliMagFMaps &magf)
285 void AliMagFMaps::Streamer(TBuffer &R__b)
287 // Stream an object of class AliMagFMaps.
288 if (R__b.IsReading()) {
289 AliMagFMaps::Class()->ReadBuffer(R__b, this);
292 AliMagFMaps::Class()->WriteBuffer(R__b, this);