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2 | #include "AliMagF.h" | |
3 | #include "TSystem.h" | |
4 | #include <stdlib.h> | |
5 | #include <stdio.h> | |
6 | ||
7 | //ZDC part ------------------------------------------------------------------- | |
8 | ||
9 | static const Float_t G1=20.03; | |
10 | static const Float_t FDIP=-37.34; | |
11 | static const Float_t FDIMU=6.; | |
12 | static const Float_t FCORN=11.72; | |
13 | // | |
14 | // ZBEG Beginning of the inner triplet | |
15 | // D1BEG Beginning of separator dipole 1 | |
16 | // D2BEG Beginning of separator dipole 2 | |
17 | // CORBEG Corrector dipole beginning (because of dimuon arm) | |
18 | // | |
19 | static const Float_t CORBEG=1920,COREND=CORBEG+190, CORRA2=4.5*4.5; | |
20 | // | |
21 | static const Float_t ZBEG=2300; | |
22 | static const Float_t Z1BEG=ZBEG+ 0,Z1END=Z1BEG+630,Z1RA2=3.5*3.5; | |
23 | static const Float_t Z2BEG=ZBEG+ 880,Z2END=Z2BEG+550,Z2RA2=3.5*3.5; | |
24 | static const Float_t Z3BEG=ZBEG+1530,Z3END=Z3BEG+550,Z3RA2=3.5*3.5; | |
25 | static const Float_t Z4BEG=ZBEG+2430,Z4END=Z4BEG+630,Z4RA2=3.5*3.5; | |
26 | static const Float_t D1BEG=5843.5 ,D1END=D1BEG+945,D1RA2=4.5*4.5; | |
27 | static const Float_t D2BEG=12113.2 ,D2END=D2BEG+945,D2RA2=4.5*.5; | |
28 | ||
29 | //ZDC part ------------------------------------------------------------------- | |
30 | ||
31 | ClassImp(AliMagF) | |
32 | ||
33 | //________________________________________ | |
34 | AliMagF::AliMagF(const char *name, const char *title, const Int_t integ, const Int_t map, | |
35 | const Float_t factor, const Float_t fmax) | |
36 | : TNamed(name,title) | |
37 | { | |
38 | fMap = map; | |
39 | fType = Undef; | |
40 | fInteg = integ; | |
41 | fFactor = factor; | |
42 | fMax = fmax; | |
43 | } | |
44 | ||
45 | //________________________________________ | |
46 | void AliMagF::Field(Float_t*, Float_t *b) | |
47 | { | |
48 | printf("Undefined MagF Field called, returning 0\n"); | |
49 | b[0]=b[1]=b[2]=0; | |
50 | } | |
51 | ||
52 | ClassImp(AliMagFC) | |
53 | ||
54 | //________________________________________ | |
55 | AliMagFC::AliMagFC(const char *name, const char *title, const Int_t integ, const Int_t map, | |
56 | const Float_t factor, const Float_t fmax) | |
57 | : AliMagF(name,title,integ,map,factor,fmax) | |
58 | { | |
59 | printf("Constant Field %s created: map= %d, factor= %f\n",fName.Data(),map,factor); | |
60 | fType = Const; | |
61 | } | |
62 | ||
63 | //________________________________________ | |
64 | void AliMagFC::Field(Float_t *x, Float_t *b) | |
65 | { | |
66 | b[0]=b[1]=b[2]=0; | |
67 | if(fMap==1) { | |
68 | if(TMath::Abs(x[2])<700 && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) { | |
69 | b[2]=2; | |
70 | } else { | |
71 | if ( 725 <= x[2] && x[2] <= 1225 ) { | |
72 | Float_t dz = TMath::Abs(975-x[2])*0.01; | |
73 | b[0]=(1-0.1*dz*dz)*7; | |
74 | } | |
75 | else { | |
76 | //This is the ZDC part | |
77 | Float_t rad2=x[0]*x[0]+x[1]*x[1]; | |
78 | if(rad2<D2RA2) { | |
79 | if(x[2]>D2BEG) { | |
80 | ||
81 | // Separator Dipole D2 | |
82 | if(x[2]<D2END) b[1]=FDIP; | |
83 | } else if(x[2]>D1BEG) { | |
84 | ||
85 | // Separator Dipole D1 | |
86 | if(x[2]<D1END) b[1]=-FDIP; | |
87 | } | |
88 | if(rad2<CORRA2) { | |
89 | ||
90 | // First quadrupole of inner triplet de-focussing in x-direction | |
91 | // Inner triplet | |
92 | if(x[2]>Z4BEG) { | |
93 | if(x[2]<Z4END) { | |
94 | ||
95 | // 2430 <-> 3060 | |
96 | b[0]=-G1*x[1]; | |
97 | b[1]=-G1*x[0]; | |
98 | } | |
99 | } else if(x[2]>Z3BEG) { | |
100 | if(x[2]<Z3END) { | |
101 | ||
102 | // 1530 <-> 2080 | |
103 | b[0]=G1*x[1]; | |
104 | b[1]=G1*x[0]; | |
105 | } | |
106 | } else if(x[2]>Z2BEG) { | |
107 | if(x[2]<Z2END) { | |
108 | ||
109 | // 890 <-> 1430 | |
110 | b[0]=G1*x[1]; | |
111 | b[1]=G1*x[0]; | |
112 | } | |
113 | } else if(x[2]>Z1BEG) { | |
114 | if(x[2]<Z1END) { | |
115 | ||
116 | // 0 <-> 630 | |
117 | b[0]=-G1*x[1]; | |
118 | b[1]=-G1*x[0]; | |
119 | } | |
120 | } else if(x[2]>CORBEG) { | |
121 | if(x[2]<COREND) { | |
122 | // Corrector dipole (because of dimuon arm) | |
123 | b[0]=FCORN; | |
124 | } | |
125 | } | |
126 | } | |
127 | } | |
128 | } | |
129 | } | |
130 | } else { | |
131 | printf("Invalid field map for constant field %d\n",fMap); | |
132 | exit(1); | |
133 | } | |
134 | } | |
135 | ||
136 | ClassImp(AliMagFCM) | |
137 | ||
138 | //________________________________________ | |
139 | AliMagFCM::AliMagFCM(const char *name, const char *title, const Int_t integ, const Int_t map, | |
140 | const Float_t factor, const Float_t fmax) | |
141 | : AliMagF(name,title,integ,map,factor,fmax) | |
142 | { | |
143 | fType = ConMesh; | |
144 | printf("Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",fName.Data(),map,factor,fTitle.Data()); | |
145 | } | |
146 | ||
147 | //________________________________________ | |
148 | void AliMagFCM::Field(Float_t *x, Float_t *b) | |
149 | { | |
150 | Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1, | |
151 | bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3]; | |
152 | const Double_t one=1; | |
153 | Int_t ix, iy, iz; | |
154 | ||
155 | // --- find the position in the grid --- | |
156 | ||
157 | b[0]=b[1]=b[2]=0; | |
158 | if(-700<x[2] && x[2]<fZbeg && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) { | |
159 | b[2]=2; | |
160 | } else { | |
161 | if(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1) | |
162 | && ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) ) | |
163 | && ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) )) { | |
164 | xl[0]=TMath::Abs(x[0])-fXbeg; | |
165 | xl[1]=TMath::Abs(x[1])-fYbeg; | |
166 | xl[2]=x[2]-fZbeg; | |
167 | ||
168 | // --- start with x | |
169 | ||
170 | hix=xl[0]*fXdeli; | |
171 | ratx=hix-int(hix); | |
172 | ix=int(hix); | |
173 | ||
174 | hiy=xl[1]*fYdeli; | |
175 | raty=hiy-int(hiy); | |
176 | iy=int(hiy); | |
177 | ||
178 | hiz=xl[2]*fZdeli; | |
179 | ratz=hiz-int(hiz); | |
180 | iz=int(hiz); | |
181 | ||
182 | if(fMap==2) { | |
183 | // ... simple interpolation | |
184 | ratx1=one-ratx; | |
185 | raty1=one-raty; | |
186 | ratz1=one-ratz; | |
187 | bhyhz = Bx(ix ,iy+1,iz+1)*ratx1+Bx(ix+1,iy+1,iz+1)*ratx; | |
188 | bhylz = Bx(ix ,iy+1,iz )*ratx1+Bx(ix+1,iy+1,iz )*ratx; | |
189 | blyhz = Bx(ix ,iy ,iz+1)*ratx1+Bx(ix+1,iy ,iz+1)*ratx; | |
190 | blylz = Bx(ix ,iy ,iz )*ratx1+Bx(ix+1,iy ,iz )*ratx; | |
191 | bhz = blyhz *raty1+bhyhz *raty; | |
192 | blz = blylz *raty1+bhylz *raty; | |
193 | b[0] = blz *ratz1+bhz *ratz; | |
194 | // | |
195 | bhyhz = By(ix ,iy+1,iz+1)*ratx1+By(ix+1,iy+1,iz+1)*ratx; | |
196 | bhylz = By(ix ,iy+1,iz )*ratx1+By(ix+1,iy+1,iz )*ratx; | |
197 | blyhz = By(ix ,iy ,iz+1)*ratx1+By(ix+1,iy ,iz+1)*ratx; | |
198 | blylz = By(ix ,iy ,iz )*ratx1+By(ix+1,iy ,iz )*ratx; | |
199 | bhz = blyhz *raty1+bhyhz *raty; | |
200 | blz = blylz *raty1+bhylz *raty; | |
201 | b[1] = blz *ratz1+bhz *ratz; | |
202 | // | |
203 | bhyhz = Bz(ix ,iy+1,iz+1)*ratx1+Bz(ix+1,iy+1,iz+1)*ratx; | |
204 | bhylz = Bz(ix ,iy+1,iz )*ratx1+Bz(ix+1,iy+1,iz )*ratx; | |
205 | blyhz = Bz(ix ,iy ,iz+1)*ratx1+Bz(ix+1,iy ,iz+1)*ratx; | |
206 | blylz = Bz(ix ,iy ,iz )*ratx1+Bz(ix+1,iy ,iz )*ratx; | |
207 | bhz = blyhz *raty1+bhyhz *raty; | |
208 | blz = blylz *raty1+bhylz *raty; | |
209 | b[2] = blz *ratz1+bhz *ratz; | |
210 | //printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n", | |
211 | //ratx,raty,ratz,b[0],b[1],b[2]); | |
212 | // | |
213 | // ... use the dipole symmetry | |
214 | if (x[0]*x[1] < 0) b[1]=-b[1]; | |
215 | if (x[0]<0) b[2]=-b[2]; | |
216 | } else { | |
217 | printf("Invalid field map for constant mesh %d\n",fMap); | |
218 | } | |
219 | } else { | |
220 | //This is the ZDC part | |
221 | Float_t rad2=x[0]*x[0]+x[1]*x[1]; | |
222 | if(rad2<D2RA2) { | |
223 | if(x[2]>D2BEG) { | |
224 | ||
225 | // Separator Dipole D2 | |
226 | if(x[2]<D2END) b[1]=FDIP; | |
227 | } else if(x[2]>D1BEG) { | |
228 | ||
229 | // Separator Dipole D1 | |
230 | if(x[2]<D1END) b[1]=-FDIP; | |
231 | } | |
232 | if(rad2<CORRA2) { | |
233 | ||
234 | // First quadrupole of inner triplet de-focussing in x-direction | |
235 | // Inner triplet | |
236 | if(x[2]>Z4BEG) { | |
237 | if(x[2]<Z4END) { | |
238 | ||
239 | // 2430 <-> 3060 | |
240 | b[0]=-G1*x[1]; | |
241 | b[1]=-G1*x[0]; | |
242 | } | |
243 | } else if(x[2]>Z3BEG) { | |
244 | if(x[2]<Z3END) { | |
245 | ||
246 | // 1530 <-> 2080 | |
247 | b[0]=G1*x[1]; | |
248 | b[1]=G1*x[0]; | |
249 | } | |
250 | } else if(x[2]>Z2BEG) { | |
251 | if(x[2]<Z2END) { | |
252 | ||
253 | // 890 <-> 1430 | |
254 | b[0]=G1*x[1]; | |
255 | b[1]=G1*x[0]; | |
256 | } | |
257 | } else if(x[2]>Z1BEG) { | |
258 | if(x[2]<Z1END) { | |
259 | ||
260 | // 0 <-> 630 | |
261 | b[0]=-G1*x[1]; | |
262 | b[1]=-G1*x[0]; | |
263 | } | |
264 | } else if(x[2]>CORBEG) { | |
265 | if(x[2]<COREND) { | |
266 | // Corrector dipole (because of dimuon arm) | |
267 | b[0]=FCORN; | |
268 | } | |
269 | } | |
270 | } | |
271 | } | |
272 | } | |
273 | } | |
274 | } | |
275 | ||
276 | //________________________________________ | |
277 | void AliMagFCM::ReadField() | |
278 | { | |
279 | FILE *magfile; | |
280 | Int_t ix, iy, iz, ipx, ipy, ipz; | |
281 | Float_t bx, by, bz; | |
282 | char *fname; | |
283 | printf("Reading Magnetic Field %s from file %s\n",fName.Data(),fTitle.Data()); | |
284 | fname = gSystem->ExpandPathName(fTitle.Data()); | |
285 | magfile=fopen(fname,"r"); | |
286 | delete [] fname; | |
287 | if (magfile) { | |
288 | fscanf(magfile,"%d %d %d %f %f %f %f %f %f", | |
289 | &fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg); | |
290 | printf("fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n", | |
291 | fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg); | |
292 | fXdeli=1./fXdel; | |
293 | fYdeli=1./fYdel; | |
294 | fZdeli=1./fZdel; | |
295 | fB = new TVector(3*fXn*fYn*fZn); | |
296 | for (iz=0; iz<fZn; iz++) { | |
297 | ipz=iz*3*(fXn*fYn); | |
298 | for (iy=0; iy<fYn; iy++) { | |
299 | ipy=ipz+iy*3*fXn; | |
300 | for (ix=0; ix<fXn; ix++) { | |
301 | ipx=ipy+ix*3; | |
302 | fscanf(magfile,"%f %f %f",&bz,&by,&bx); | |
303 | (*fB)(ipx+2)=bz; | |
304 | (*fB)(ipx+1)=by; | |
305 | (*fB)(ipx )=bx; | |
306 | } | |
307 | } | |
308 | } | |
309 | } else { | |
310 | printf("File %s not found !\n",fTitle.Data()); | |
311 | exit(1); | |
312 | } | |
313 | } | |
314 | ||
315 | ||
316 |