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():
43 // Default constructor
45 fFieldMap[0] = fFieldMap[1] = fFieldMap[2] = 0;
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),
59 // Standard constructor
68 // Don't replicate field information in gAlice
69 for (Int_t i = 0; i < 3; i++) fFieldMap[i]->SetWriteEnable(0);
73 //_______________________________________________________________________
74 AliMagFMaps::AliMagFMaps(const AliMagFMaps &magf):
86 //_______________________________________________________________________
87 AliMagFMaps::~AliMagFMaps()
97 //_______________________________________________________________________
98 void AliMagFMaps::ReadField()
100 // Read Field Map from file
104 if (fFieldRead) return;
112 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B02.root");
113 file = new TFile(fname);
114 fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B02"));
118 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB02.root");
119 file = new TFile(fname);
120 fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB02"));
124 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB02.root");
125 file = new TFile(fname);
126 fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB02"));
129 } else if (fMap == k4kG) {
132 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B04.root");
133 file = new TFile(fname);
134 fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B04"));
139 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB04.root");
140 file = new TFile(fname);
141 fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB04"));
145 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB04.root");
146 file = new TFile(fname);
147 fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB04"));
150 } else if (fMap == k5kG) {
153 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/L3B05.root");
154 file = new TFile(fname);
155 fFieldMap[0] = dynamic_cast<AliFieldMap*>(file->Get("L3B05"));
160 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/DipB05.root");
161 file = new TFile(fname);
162 fFieldMap[1] = dynamic_cast<AliFieldMap*>(file->Get("DipB05"));
166 fname = gSystem->ExpandPathName("$(ALICE_ROOT)/data/maps/ExtB05.root");
167 file = new TFile(fname);
168 fFieldMap[2] = dynamic_cast<AliFieldMap*>(file->Get("ExtB05"));
177 fFieldMap[0] = new AliFieldMap();
178 fFieldMap[0] -> SetLimits(-800., 800., -800., 800., -700., 700.);
190 fSolenoidUser = fSolenoid;
194 //_______________________________________________________________________
195 Float_t AliMagFMaps::SolenoidField() const
198 // Returns max. L3 (solenoid) field strength
199 // according to field map setting
204 //_______________________________________________________________________
205 void AliMagFMaps::Field(Float_t *x, Float_t *b)
208 // Method to calculate the magnetic field
210 // --- find the position in the grid ---
212 if (!fFieldRead) ReadField();
215 AliFieldMap* map = 0;
216 if (fFieldMap[0]->Inside(x[0], x[1], x[2])) {
220 // Constant L3 field, if this option was selected
222 b[2] = fSolenoidUser;
225 } else if (fFieldMap[1]->Inside(x[0], x[1], x[2])) {
227 } else if (fFieldMap[2]->Inside(x[0], x[1], x[2])) {
234 //This is the ZDC part
235 Float_t rad2=x[0]*x[0]+x[1]*x[1];
236 if(x[2]>kCORBEG2 && x[2]<kCOREND2){
240 } else if(x[2]>kZ1BEG && x[2]<kZ1END){
245 } else if(x[2]>kZ2BEG && x[2]<kZ2END){
251 else if(x[2]>kZ3BEG && x[2]<kZ3END){
257 else if(x[2]>kZ4BEG && x[2]<kZ4END){
263 else if(x[2]>kD1BEG && x[2]<kD1END){
268 else if(x[2]>kD2BEG && x[2]<kD2END){
269 if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
270 || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
282 //_______________________________________________________________________
283 void AliMagFMaps::Copy(AliMagFMaps & /* magf */) const
286 // Copy *this onto magf -- Not implemented
288 Fatal("Copy","Not implemented!\n");
291 //_______________________________________________________________________
292 void AliMagFMaps::Streamer(TBuffer &R__b)
294 // Stream an object of class AliMagFMaps.
295 if (R__b.IsReading()) {
296 AliMagFMaps::Class()->ReadBuffer(R__b, this);
299 AliMagFMaps::Class()->WriteBuffer(R__b, this);