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aee8290b | 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 | ||
16 | /* | |
17 | $Log$ | |
cf6abd21 | 18 | Revision 1.8 2001/05/28 14:10:35 morsch |
19 | SetSolenoidField method to set the L3 field strength. 2 kG is default. | |
20 | ||
4cc8933f | 21 | Revision 1.7 2001/05/16 14:57:22 alibrary |
22 | New files for folders and Stack | |
23 | ||
9e1a0ddb | 24 | Revision 1.6 2000/12/18 10:44:01 morsch |
25 | Possibility to set field map by passing pointer to objet of type AliMagF via | |
26 | SetField(). | |
27 | Example: | |
28 | gAlice->SetField(new AliMagFCM("Map2", "$(ALICE_ROOT)/data/field01.dat",2,1.,10.)); | |
29 | ||
d8408e76 | 30 | Revision 1.5 2000/12/01 11:20:27 alibrary |
31 | Corrector dipole removed from ZDC | |
32 | ||
006cb30c | 33 | Revision 1.4 2000/11/30 07:12:49 alibrary |
34 | Introducing new Rndm and QA classes | |
35 | ||
65fb704d | 36 | Revision 1.3 2000/11/10 18:09:55 fca |
37 | New field map for the ZDC | |
38 | ||
d95ea23f | 39 | Revision 1.2 2000/07/12 08:56:25 fca |
40 | Coding convention correction and warning removal | |
41 | ||
8918e700 | 42 | Revision 1.1 2000/07/11 18:24:59 fca |
43 | Coding convention corrections + few minor bug fixes | |
44 | ||
aee8290b | 45 | */ |
65fb704d | 46 | #include "TVector.h" |
aee8290b | 47 | |
48 | #include "AliMagFCM.h" | |
49 | #include "TSystem.h" | |
50 | ||
51 | ClassImp(AliMagFCM) | |
52 | ||
53 | //________________________________________ | |
54 | AliMagFCM::AliMagFCM(const char *name, const char *title, const Int_t integ, | |
d8408e76 | 55 | const Float_t factor, const Float_t fmax) |
56 | : AliMagF(name,title,integ,factor,fmax) | |
aee8290b | 57 | { |
58 | // | |
59 | // Standard constructor | |
60 | // | |
cf6abd21 | 61 | fB=0; |
aee8290b | 62 | fType = kConMesh; |
d8408e76 | 63 | fMap = 2; |
4cc8933f | 64 | SetSolenoidField(); |
65 | ||
9e1a0ddb | 66 | if(fDebug>-1) printf("%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n", |
67 | ClassName(),fName.Data(), fMap, factor,fTitle.Data()); | |
4cc8933f | 68 | |
aee8290b | 69 | } |
70 | ||
71 | //________________________________________ | |
72 | AliMagFCM::AliMagFCM(const AliMagFCM &magf) | |
73 | { | |
74 | // | |
75 | // Copy constructor | |
76 | // | |
77 | magf.Copy(*this); | |
78 | } | |
79 | ||
80 | //________________________________________ | |
81 | void AliMagFCM::Field(Float_t *x, Float_t *b) | |
82 | { | |
83 | // | |
84 | // Method to calculate the magnetic field | |
85 | // | |
86 | Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1, | |
87 | bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3]; | |
88 | const Double_t kone=1; | |
89 | Int_t ix, iy, iz; | |
90 | ||
91 | // --- find the position in the grid --- | |
92 | ||
93 | b[0]=b[1]=b[2]=0; | |
94 | if(-700<x[2] && x[2]<fZbeg && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) { | |
4cc8933f | 95 | b[2]= fSolenoid; |
aee8290b | 96 | } else { |
97 | Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1) | |
98 | && ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) ) | |
99 | && ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) )); | |
100 | if(infield) { | |
101 | xl[0]=TMath::Abs(x[0])-fXbeg; | |
102 | xl[1]=TMath::Abs(x[1])-fYbeg; | |
103 | xl[2]=x[2]-fZbeg; | |
104 | ||
105 | // --- start with x | |
106 | ||
107 | hix=xl[0]*fXdeli; | |
108 | ratx=hix-int(hix); | |
109 | ix=int(hix); | |
110 | ||
111 | hiy=xl[1]*fYdeli; | |
112 | raty=hiy-int(hiy); | |
113 | iy=int(hiy); | |
114 | ||
115 | hiz=xl[2]*fZdeli; | |
116 | ratz=hiz-int(hiz); | |
117 | iz=int(hiz); | |
118 | ||
119 | if(fMap==2) { | |
120 | // ... simple interpolation | |
121 | ratx1=kone-ratx; | |
122 | raty1=kone-raty; | |
123 | ratz1=kone-ratz; | |
124 | bhyhz = Bx(ix ,iy+1,iz+1)*ratx1+Bx(ix+1,iy+1,iz+1)*ratx; | |
125 | bhylz = Bx(ix ,iy+1,iz )*ratx1+Bx(ix+1,iy+1,iz )*ratx; | |
126 | blyhz = Bx(ix ,iy ,iz+1)*ratx1+Bx(ix+1,iy ,iz+1)*ratx; | |
127 | blylz = Bx(ix ,iy ,iz )*ratx1+Bx(ix+1,iy ,iz )*ratx; | |
128 | bhz = blyhz *raty1+bhyhz *raty; | |
129 | blz = blylz *raty1+bhylz *raty; | |
130 | b[0] = blz *ratz1+bhz *ratz; | |
131 | // | |
132 | bhyhz = By(ix ,iy+1,iz+1)*ratx1+By(ix+1,iy+1,iz+1)*ratx; | |
133 | bhylz = By(ix ,iy+1,iz )*ratx1+By(ix+1,iy+1,iz )*ratx; | |
134 | blyhz = By(ix ,iy ,iz+1)*ratx1+By(ix+1,iy ,iz+1)*ratx; | |
135 | blylz = By(ix ,iy ,iz )*ratx1+By(ix+1,iy ,iz )*ratx; | |
136 | bhz = blyhz *raty1+bhyhz *raty; | |
137 | blz = blylz *raty1+bhylz *raty; | |
138 | b[1] = blz *ratz1+bhz *ratz; | |
139 | // | |
140 | bhyhz = Bz(ix ,iy+1,iz+1)*ratx1+Bz(ix+1,iy+1,iz+1)*ratx; | |
141 | bhylz = Bz(ix ,iy+1,iz )*ratx1+Bz(ix+1,iy+1,iz )*ratx; | |
142 | blyhz = Bz(ix ,iy ,iz+1)*ratx1+Bz(ix+1,iy ,iz+1)*ratx; | |
143 | blylz = Bz(ix ,iy ,iz )*ratx1+Bz(ix+1,iy ,iz )*ratx; | |
144 | bhz = blyhz *raty1+bhyhz *raty; | |
145 | blz = blylz *raty1+bhylz *raty; | |
146 | b[2] = blz *ratz1+bhz *ratz; | |
147 | //printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n", | |
148 | //ratx,raty,ratz,b[0],b[1],b[2]); | |
149 | // | |
150 | // ... use the dipole symmetry | |
151 | if (x[0]*x[1] < 0) b[1]=-b[1]; | |
152 | if (x[0]<0) b[2]=-b[2]; | |
153 | } else { | |
154 | printf("Invalid field map for constant mesh %d\n",fMap); | |
155 | } | |
156 | } else { | |
d95ea23f | 157 | //This is the ZDC part |
158 | Float_t rad2=x[0]*x[0]+x[1]*x[1]; | |
006cb30c | 159 | if(x[2]>kCORBEG2 && x[2]<kCOREND2){ |
d95ea23f | 160 | if(rad2<kCOR2RA2){ |
161 | b[0] = kFCORN2; | |
162 | } | |
163 | } | |
164 | else if(x[2]>kZ1BEG && x[2]<kZ1END){ | |
165 | if(rad2<kZ1RA2){ | |
166 | b[0] = -kG1*x[1]; | |
167 | b[1] = -kG1*x[0]; | |
168 | } | |
169 | } | |
170 | else if(x[2]>kZ2BEG && x[2]<kZ2END){ | |
171 | if(rad2<kZ2RA2){ | |
172 | b[0] = kG1*x[1]; | |
173 | b[1] = kG1*x[0]; | |
174 | } | |
175 | } | |
176 | else if(x[2]>kZ3BEG && x[2]<kZ3END){ | |
177 | if(rad2<kZ3RA2){ | |
178 | b[0] = kG1*x[1]; | |
179 | b[1] = kG1*x[0]; | |
180 | } | |
181 | } | |
182 | else if(x[2]>kZ4BEG && x[2]<kZ4END){ | |
183 | if(rad2<kZ4RA2){ | |
184 | b[0] = -kG1*x[1]; | |
185 | b[1] = -kG1*x[0]; | |
186 | } | |
187 | } | |
188 | else if(x[2]>kD1BEG && x[2]<kD1END){ | |
189 | if(rad2<kD1RA2){ | |
190 | b[1] = -kFDIP; | |
191 | } | |
192 | } | |
193 | else if(x[2]>kD2BEG && x[2]<kD2END){ | |
194 | if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2 | |
195 | || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){ | |
196 | b[1] = kFDIP; | |
aee8290b | 197 | } |
198 | } | |
d95ea23f | 199 | |
200 | } | |
aee8290b | 201 | } |
202 | if(fFactor!=1) { | |
203 | b[0]*=fFactor; | |
204 | b[1]*=fFactor; | |
205 | b[2]*=fFactor; | |
206 | } | |
207 | } | |
208 | ||
209 | //________________________________________ | |
210 | void AliMagFCM::ReadField() | |
211 | { | |
212 | // | |
213 | // Method to read the magnetic field map from file | |
214 | // | |
215 | FILE *magfile; | |
216 | Int_t ix, iy, iz, ipx, ipy, ipz; | |
217 | Float_t bx, by, bz; | |
218 | char *fname; | |
9e1a0ddb | 219 | if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),fName.Data(),fTitle.Data()); |
aee8290b | 220 | fname = gSystem->ExpandPathName(fTitle.Data()); |
221 | magfile=fopen(fname,"r"); | |
222 | delete [] fname; | |
223 | if (magfile) { | |
224 | fscanf(magfile,"%d %d %d %f %f %f %f %f %f", | |
225 | &fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg); | |
9e1a0ddb | 226 | if(fDebug>1) printf("%s: fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n", |
227 | ClassName(),fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg); | |
aee8290b | 228 | fXdeli=1./fXdel; |
229 | fYdeli=1./fYdel; | |
230 | fZdeli=1./fZdel; | |
231 | fB = new TVector(3*fXn*fYn*fZn); | |
232 | for (iz=0; iz<fZn; iz++) { | |
233 | ipz=iz*3*(fXn*fYn); | |
234 | for (iy=0; iy<fYn; iy++) { | |
235 | ipy=ipz+iy*3*fXn; | |
236 | for (ix=0; ix<fXn; ix++) { | |
237 | ipx=ipy+ix*3; | |
238 | fscanf(magfile,"%f %f %f",&bz,&by,&bx); | |
239 | (*fB)(ipx+2)=bz; | |
240 | (*fB)(ipx+1)=by; | |
241 | (*fB)(ipx )=bx; | |
242 | } | |
243 | } | |
244 | } | |
245 | } else { | |
9e1a0ddb | 246 | printf("%s: File %s not found !\n",ClassName(),fTitle.Data()); |
aee8290b | 247 | exit(1); |
248 | } | |
249 | } | |
250 | ||
251 | //________________________________________ | |
8918e700 | 252 | void AliMagFCM::Copy(AliMagFCM & /* magf */) const |
aee8290b | 253 | { |
254 | // | |
8918e700 | 255 | // Copy *this onto magf -- Not implemented |
aee8290b | 256 | // |
257 | Fatal("Copy","Not implemented!\n"); | |
258 | } | |
259 | ||
260 | //________________________________________ | |
261 | AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf) | |
262 | { | |
263 | magf.Copy(*this); | |
264 | return *this; | |
265 | } |