| 1 |
|
| 2 |
|
| 3 |
************************************************************* |
| 4 |
* |
| 5 |
* Routines to compute the NPOINT track intersection points |
| 6 |
* with planes of z-coordinate given by ZIN |
| 7 |
* given the track parameters |
| 8 |
* |
| 9 |
* The routine is based on GRKUTA, which computes the |
| 10 |
* trajectory of a charged particle in a magnetic field |
| 11 |
* by solving the equations of motion with Runge-Kuta method |
| 12 |
* |
| 13 |
* Variables that have to be assigned when the subroutine |
| 14 |
* is called: |
| 15 |
* |
| 16 |
* ZIN(1-NPOINT) ----> z coordinates of the planes |
| 17 |
* AL_P(1-5) ----> track-parameter vector |
| 18 |
* |
| 19 |
* NB !!! |
| 20 |
* The routine works properly only if the |
| 21 |
* planes are numbered in descending order |
| 22 |
* |
| 23 |
* Routines: |
| 24 |
* |
| 25 |
* DOTRACK(NPOINT,ZIN,XOUT,YOUT,AL_P,IFAIL) |
| 26 |
* - old routine |
| 27 |
* |
| 28 |
* DOTRACK2(NPOINT,ZIN,XOUT,YOUT,THXOUT,THYOUT,TLOUT,AL_P,IFAIL) |
| 29 |
* - as the previous one, but: |
| 30 |
* -- the projected angles are given as output |
| 31 |
* -- the track lengths are given as output: |
| 32 |
* ---- for planes above the reference plane, the length until |
| 33 |
* the lower closest plane (reference plane included) |
| 34 |
* ---- for planes below the reference plane, the length until |
| 35 |
* the higher closest plane (reference plane included) |
| 36 |
* |
| 37 |
* March 2008 --> optimized by Paolo |
| 38 |
* |
| 39 |
* DOTRACK3(NPOINT,ZIN,XOUT,YOUT,THXOUT,THYOUT,TLOUT,AL_P,IFAIL) |
| 40 |
* - as the previous one, but with the coordinate ZINI of the reference |
| 41 |
* plane given as input parameter |
| 42 |
* |
| 43 |
* |
| 44 |
************************************************************** |
| 45 |
|
| 46 |
|
| 47 |
SUBROUTINE |
| 48 |
$ DOTRACK3(NPOINT,ZIN,XOUT,YOUT,THXOUT,THYOUT,TLOUT,AL_P |
| 49 |
$ ,ZINI,IFAIL) |
| 50 |
|
| 51 |
IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
| 52 |
|
| 53 |
|
| 54 |
DIMENSION VECT(7),VECTINI(7),VOUT(7) |
| 55 |
DATA TOLL/1.d-8/ |
| 56 |
|
| 57 |
* tolerance in reaching the next plane during the tracking procedure |
| 58 |
* ----------------------------------------------- |
| 59 |
* I/O parameters |
| 60 |
PARAMETER (NPOINT_MAX=100) |
| 61 |
DIMENSION ZIN(NPOINT_MAX) |
| 62 |
DIMENSION XOUT(NPOINT_MAX),YOUT(NPOINT_MAX) |
| 63 |
DIMENSION THXOUT(NPOINT_MAX),THYOUT(NPOINT_MAX) |
| 64 |
DIMENSION TLOUT(NPOINT_MAX) |
| 65 |
DIMENSION AL_P(5) |
| 66 |
* ----------------------------------------------- |
| 67 |
* DATA ZINI/23.5/ !z coordinate of the reference plane |
| 68 |
REAL*8 L |
| 69 |
|
| 70 |
* ================================================================== |
| 71 |
* divide the track in two parts: below and above the reference plane |
| 72 |
* ================================================================== |
| 73 |
IUPDOWN=0 |
| 74 |
DO I=1,NPOINT |
| 75 |
IF(ZIN(I).LT.ZINI)THEN |
| 76 |
if(i.ne.1)IUPDOWN=I |
| 77 |
GOTO 88 |
| 78 |
ENDIF |
| 79 |
IUPDOWN=NPOINT+1 |
| 80 |
ENDDO |
| 81 |
88 CONTINUE |
| 82 |
|
| 83 |
* ================================================================== |
| 84 |
* track from reference plane DOWN |
| 85 |
* ================================================================== |
| 86 |
* parameters for GRKUTA |
| 87 |
IF(AL_P(5).NE.0) CHARGE=AL_P(5)/DABS(AL_P(5)) |
| 88 |
IF(AL_P(5).EQ.0) CHARGE=1. |
| 89 |
VOUT(1)=AL_P(1) |
| 90 |
VOUT(2)=AL_P(2) |
| 91 |
VOUT(3)=ZINI |
| 92 |
VOUT(4)=AL_P(3)*DCOS(AL_P(4)) |
| 93 |
VOUT(5)=AL_P(3)*DSIN(AL_P(4)) |
| 94 |
VOUT(6)=-1.*DSQRT(1.-AL_P(3)**2) |
| 95 |
IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 96 |
IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 97 |
DO I=MAX(IUPDOWN,1),NPOINT |
| 98 |
L = 0.0 |
| 99 |
10 DO J=1,7 |
| 100 |
VECT(J)=VOUT(J) |
| 101 |
VECTINI(J)=VOUT(J) |
| 102 |
ENDDO |
| 103 |
IF(VOUT(6).GE.0.) THEN |
| 104 |
IFAIL=1 |
| 105 |
c$$$ if(TRKVERBOSE) |
| 106 |
c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 107 |
RETURN |
| 108 |
ENDIF |
| 109 |
step=(zin(i)-vect(3))/VOUT(6) |
| 110 |
11 continue |
| 111 |
CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 112 |
L = L + STEP |
| 113 |
IF(VOUT(3).GT.VECT(3)) THEN |
| 114 |
IFAIL=1 |
| 115 |
c$$$ if(TRKVERBOSE) |
| 116 |
c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 117 |
c$$$ if(TRKVERBOSE)print*,'charge',charge |
| 118 |
c$$$ if(TRKVERBOSE)print*,'vect',vect |
| 119 |
c$$$ if(TRKVERBOSE)print*,'vout',vout |
| 120 |
c$$$ if(TRKVERBOSE)print*,'step',step |
| 121 |
c$$$ if(TRKVERBOSE)print*,'DeltaB',DELTA0,DELTA1 |
| 122 |
RETURN |
| 123 |
ENDIF |
| 124 |
Z=VOUT(3) |
| 125 |
IF(Z.LE.ZIN(I)+TOLL.AND.Z.GE.ZIN(I)-TOLL) GOTO 100 |
| 126 |
IF(Z.GT.ZIN(I)+TOLL) GOTO 10 |
| 127 |
IF(Z.LE.ZIN(I)-TOLL) THEN |
| 128 |
L = L - STEP |
| 129 |
STEP=STEP*(ZIN(I)-VECT(3))/(Z-VECT(3)) |
| 130 |
DO J=1,7 |
| 131 |
VECT(J)=VECTINI(J) |
| 132 |
ENDDO |
| 133 |
GOTO 11 |
| 134 |
ENDIF |
| 135 |
100 XOUT(I)=VOUT(1) |
| 136 |
YOUT(I)=VOUT(2) |
| 137 |
ZIN(I)=VOUT(3) |
| 138 |
IF(VOUT(3).ne.0)THEN |
| 139 |
THXOUT(I)=DATAN(VOUT(4)/VOUT(6))*180./ACOS(-1.) |
| 140 |
THYOUT(I)=DATAN(VOUT(5)/VOUT(6))*180./ACOS(-1.) |
| 141 |
ENDIF |
| 142 |
TLOUT(I) = L |
| 143 |
c print*,'D ',VECT(3),VOUT(3),VOUT(8),STEP |
| 144 |
ENDDO |
| 145 |
|
| 146 |
* ================================================================== |
| 147 |
* track from reference plane UP |
| 148 |
* ================================================================== |
| 149 |
* parameters for GRKUTA: |
| 150 |
* -opposite charge |
| 151 |
* -opposite momentum direction |
| 152 |
IF(AL_P(5).NE.0) CHARGE=-AL_P(5)/DABS(AL_P(5)) |
| 153 |
IF(AL_P(5).EQ.0) CHARGE=-1. |
| 154 |
VOUT(1)=AL_P(1) |
| 155 |
VOUT(2)=AL_P(2) |
| 156 |
VOUT(3)=ZINI |
| 157 |
VOUT(4)=-AL_P(3)*DCOS(AL_P(4)) |
| 158 |
VOUT(5)=-AL_P(3)*DSIN(AL_P(4)) |
| 159 |
VOUT(6)=1.*DSQRT(1.-AL_P(3)**2) |
| 160 |
IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 161 |
IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 162 |
DO I=MIN((IUPDOWN-1),NPOINT),1,-1 |
| 163 |
L = 0.0 |
| 164 |
|
| 165 |
20 DO J=1,7 |
| 166 |
VECT(J)=VOUT(J) |
| 167 |
VECTINI(J)=VOUT(J) |
| 168 |
ENDDO |
| 169 |
IF(VOUT(6).LE.0.) THEN |
| 170 |
IFAIL=1 |
| 171 |
c$$$ if(TRKVERBOSE) |
| 172 |
c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 173 |
RETURN |
| 174 |
ENDIF |
| 175 |
step=(zin(i)-vect(3))/VOUT(6) |
| 176 |
22 continue |
| 177 |
CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 178 |
L = L + STEP |
| 179 |
IF(VOUT(3).LT.VECT(3)) THEN |
| 180 |
IFAIL=1 |
| 181 |
c$$$ if(TRKVERBOSE) |
| 182 |
c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 183 |
c$$$ if(TRKVERBOSE)print*,'charge',charge |
| 184 |
c$$$ if(TRKVERBOSE)print*,'vect',vect |
| 185 |
c$$$ if(TRKVERBOSE)print*,'vout',vout |
| 186 |
c$$$ if(TRKVERBOSE)print*,'step',step |
| 187 |
c$$$ if(TRKVERBOSE)print*,'DeltaB',DELTA0,DELTA1 |
| 188 |
RETURN |
| 189 |
ENDIF |
| 190 |
Z=VOUT(3) |
| 191 |
IF(Z.LE.ZIN(I)+TOLL.AND.Z.GE.ZIN(I)-TOLL) GOTO 200 |
| 192 |
IF(Z.LT.ZIN(I)-TOLL) GOTO 20 |
| 193 |
IF(Z.GE.ZIN(I)+TOLL) THEN |
| 194 |
L = L - STEP |
| 195 |
STEP=STEP*(ZIN(I)-VECT(3))/(Z-VECT(3)) |
| 196 |
DO J=1,7 |
| 197 |
VECT(J)=VECTINI(J) |
| 198 |
ENDDO |
| 199 |
GOTO 22 |
| 200 |
ENDIF |
| 201 |
200 XOUT(I)=VOUT(1) |
| 202 |
YOUT(I)=VOUT(2) |
| 203 |
ZIN(I)=VOUT(3) |
| 204 |
IF(VOUT(3).ne.0)THEN |
| 205 |
THXOUT(I)=DATAN(VOUT(4)/VOUT(6))*180./ACOS(-1.) |
| 206 |
THYOUT(I)=DATAN(VOUT(5)/VOUT(6))*180./ACOS(-1.) |
| 207 |
ENDIF |
| 208 |
TLOUT(I) = L |
| 209 |
ENDDO |
| 210 |
|
| 211 |
RETURN |
| 212 |
END |
| 213 |
************************************************************************ |
| 214 |
* |
| 215 |
* |
| 216 |
* |
| 217 |
* |
| 218 |
************************************************************************ |
| 219 |
|
| 220 |
SUBROUTINE |
| 221 |
$ DOTRACK2(NPOINT,ZIN,XOUT,YOUT,THXOUT,THYOUT,TLOUT,AL_P,IFAIL) |
| 222 |
|
| 223 |
IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
| 224 |
|
| 225 |
|
| 226 |
ccc DIMENSION VECT(7),VECTINI(7),VOUT(7) |
| 227 |
ccc DATA TOLL/1.d-8/ |
| 228 |
|
| 229 |
* tolerance in reaching the next plane during the tracking procedure |
| 230 |
* ----------------------------------------------- |
| 231 |
* I/O parameters |
| 232 |
PARAMETER (NPOINT_MAX=100) |
| 233 |
DIMENSION ZIN(NPOINT_MAX) |
| 234 |
DIMENSION XOUT(NPOINT_MAX),YOUT(NPOINT_MAX) |
| 235 |
DIMENSION THXOUT(NPOINT_MAX),THYOUT(NPOINT_MAX) |
| 236 |
DIMENSION TLOUT(NPOINT_MAX) |
| 237 |
DIMENSION AL_P(5) |
| 238 |
* ----------------------------------------------- |
| 239 |
DATA ZINI/23.5/ !z coordinate of the reference plane |
| 240 |
ccc REAL*8 L |
| 241 |
|
| 242 |
CALL DOTRACK3(NPOINT,ZIN,XOUT,YOUT,THXOUT,THYOUT,TLOUT,AL_P |
| 243 |
$ ,ZINI,IFAIL) |
| 244 |
|
| 245 |
ccc |
| 246 |
ccc OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD |
| 247 |
ccc |
| 248 |
|
| 249 |
c$$$* ================================================================== |
| 250 |
c$$$* divide the track in two parts: below and above the reference plane |
| 251 |
c$$$* ================================================================== |
| 252 |
c$$$ IUPDOWN=0 |
| 253 |
c$$$ DO I=1,NPOINT |
| 254 |
c$$$ IF(ZIN(I).LT.ZINI)THEN |
| 255 |
c$$$ if(i.ne.1)IUPDOWN=I |
| 256 |
c$$$ GOTO 88 |
| 257 |
c$$$ ENDIF |
| 258 |
c$$$ IUPDOWN=NPOINT+1 |
| 259 |
c$$$ ENDDO |
| 260 |
c$$$ 88 CONTINUE |
| 261 |
c$$$ |
| 262 |
c$$$* ================================================================== |
| 263 |
c$$$* track from reference plane DOWN |
| 264 |
c$$$* ================================================================== |
| 265 |
c$$$* parameters for GRKUTA |
| 266 |
c$$$ IF(AL_P(5).NE.0) CHARGE=AL_P(5)/DABS(AL_P(5)) |
| 267 |
c$$$ IF(AL_P(5).EQ.0) CHARGE=1. |
| 268 |
c$$$ VOUT(1)=AL_P(1) |
| 269 |
c$$$ VOUT(2)=AL_P(2) |
| 270 |
c$$$ VOUT(3)=ZINI |
| 271 |
c$$$ VOUT(4)=AL_P(3)*DCOS(AL_P(4)) |
| 272 |
c$$$ VOUT(5)=AL_P(3)*DSIN(AL_P(4)) |
| 273 |
c$$$ VOUT(6)=-1.*DSQRT(1.-AL_P(3)**2) |
| 274 |
c$$$ IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 275 |
c$$$ IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 276 |
c$$$ DO I=MAX(IUPDOWN,1),NPOINT |
| 277 |
c$$$ L = 0.0 |
| 278 |
c$$$ 10 DO J=1,7 |
| 279 |
c$$$ VECT(J)=VOUT(J) |
| 280 |
c$$$ VECTINI(J)=VOUT(J) |
| 281 |
c$$$ ENDDO |
| 282 |
c$$$ IF(VOUT(6).GE.0.) THEN |
| 283 |
c$$$ IFAIL=1 |
| 284 |
c$$$c$$$ if(TRKVERBOSE) |
| 285 |
c$$$c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 286 |
c$$$ RETURN |
| 287 |
c$$$ ENDIF |
| 288 |
c$$$ step=(zin(i)-vect(3))/VOUT(6) |
| 289 |
c$$$ 11 continue |
| 290 |
c$$$ CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 291 |
c$$$ L = L + STEP |
| 292 |
c$$$ IF(VOUT(3).GT.VECT(3)) THEN |
| 293 |
c$$$ IFAIL=1 |
| 294 |
c$$$c$$$ if(TRKVERBOSE) |
| 295 |
c$$$c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 296 |
c$$$c$$$ if(TRKVERBOSE)print*,'charge',charge |
| 297 |
c$$$c$$$ if(TRKVERBOSE)print*,'vect',vect |
| 298 |
c$$$c$$$ if(TRKVERBOSE)print*,'vout',vout |
| 299 |
c$$$c$$$ if(TRKVERBOSE)print*,'step',step |
| 300 |
c$$$c$$$ if(TRKVERBOSE)print*,'DeltaB',DELTA0,DELTA1 |
| 301 |
c$$$ RETURN |
| 302 |
c$$$ ENDIF |
| 303 |
c$$$ Z=VOUT(3) |
| 304 |
c$$$ IF(Z.LE.ZIN(I)+TOLL.AND.Z.GE.ZIN(I)-TOLL) GOTO 100 |
| 305 |
c$$$ IF(Z.GT.ZIN(I)+TOLL) GOTO 10 |
| 306 |
c$$$ IF(Z.LE.ZIN(I)-TOLL) THEN |
| 307 |
c$$$ L = L - STEP |
| 308 |
c$$$ STEP=STEP*(ZIN(I)-VECT(3))/(Z-VECT(3)) |
| 309 |
c$$$ DO J=1,7 |
| 310 |
c$$$ VECT(J)=VECTINI(J) |
| 311 |
c$$$ ENDDO |
| 312 |
c$$$ GOTO 11 |
| 313 |
c$$$ ENDIF |
| 314 |
c$$$ 100 XOUT(I)=VOUT(1) |
| 315 |
c$$$ YOUT(I)=VOUT(2) |
| 316 |
c$$$ ZIN(I)=VOUT(3) |
| 317 |
c$$$ IF(VOUT(3).ne.0)THEN |
| 318 |
c$$$ THXOUT(I)=DATAN(VOUT(4)/VOUT(6))*180./ACOS(-1.) |
| 319 |
c$$$ THYOUT(I)=DATAN(VOUT(5)/VOUT(6))*180./ACOS(-1.) |
| 320 |
c$$$ ENDIF |
| 321 |
c$$$ TLOUT(I) = L |
| 322 |
c$$$c print*,'D ',VECT(3),VOUT(3),VOUT(8),STEP |
| 323 |
c$$$ ENDDO |
| 324 |
c$$$ |
| 325 |
c$$$* ================================================================== |
| 326 |
c$$$* track from reference plane UP |
| 327 |
c$$$* ================================================================== |
| 328 |
c$$$* parameters for GRKUTA: |
| 329 |
c$$$* -opposite charge |
| 330 |
c$$$* -opposite momentum direction |
| 331 |
c$$$ IF(AL_P(5).NE.0) CHARGE=-AL_P(5)/DABS(AL_P(5)) |
| 332 |
c$$$ IF(AL_P(5).EQ.0) CHARGE=-1. |
| 333 |
c$$$ VOUT(1)=AL_P(1) |
| 334 |
c$$$ VOUT(2)=AL_P(2) |
| 335 |
c$$$ VOUT(3)=ZINI |
| 336 |
c$$$ VOUT(4)=-AL_P(3)*DCOS(AL_P(4)) |
| 337 |
c$$$ VOUT(5)=-AL_P(3)*DSIN(AL_P(4)) |
| 338 |
c$$$ VOUT(6)=1.*DSQRT(1.-AL_P(3)**2) |
| 339 |
c$$$ IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 340 |
c$$$ IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 341 |
c$$$ DO I=MIN((IUPDOWN-1),NPOINT),1,-1 |
| 342 |
c$$$ L = 0.0 |
| 343 |
c$$$ |
| 344 |
c$$$ 20 DO J=1,7 |
| 345 |
c$$$ VECT(J)=VOUT(J) |
| 346 |
c$$$ VECTINI(J)=VOUT(J) |
| 347 |
c$$$ ENDDO |
| 348 |
c$$$ IF(VOUT(6).LE.0.) THEN |
| 349 |
c$$$ IFAIL=1 |
| 350 |
c$$$c$$$ if(TRKVERBOSE) |
| 351 |
c$$$c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 352 |
c$$$ RETURN |
| 353 |
c$$$ ENDIF |
| 354 |
c$$$ step=(zin(i)-vect(3))/VOUT(6) |
| 355 |
c$$$ 22 continue |
| 356 |
c$$$ CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 357 |
c$$$ L = L + STEP |
| 358 |
c$$$ IF(VOUT(3).LT.VECT(3)) THEN |
| 359 |
c$$$ IFAIL=1 |
| 360 |
c$$$c$$$ if(TRKVERBOSE) |
| 361 |
c$$$c$$$ $ PRINT *,'dofit (grkuta): WARNING ===> backward track!!' |
| 362 |
c$$$c$$$ if(TRKVERBOSE)print*,'charge',charge |
| 363 |
c$$$c$$$ if(TRKVERBOSE)print*,'vect',vect |
| 364 |
c$$$c$$$ if(TRKVERBOSE)print*,'vout',vout |
| 365 |
c$$$c$$$ if(TRKVERBOSE)print*,'step',step |
| 366 |
c$$$c$$$ if(TRKVERBOSE)print*,'DeltaB',DELTA0,DELTA1 |
| 367 |
c$$$ RETURN |
| 368 |
c$$$ ENDIF |
| 369 |
c$$$ Z=VOUT(3) |
| 370 |
c$$$ IF(Z.LE.ZIN(I)+TOLL.AND.Z.GE.ZIN(I)-TOLL) GOTO 200 |
| 371 |
c$$$ IF(Z.LT.ZIN(I)-TOLL) GOTO 20 |
| 372 |
c$$$ IF(Z.GE.ZIN(I)+TOLL) THEN |
| 373 |
c$$$ L = L - STEP |
| 374 |
c$$$ STEP=STEP*(ZIN(I)-VECT(3))/(Z-VECT(3)) |
| 375 |
c$$$ DO J=1,7 |
| 376 |
c$$$ VECT(J)=VECTINI(J) |
| 377 |
c$$$ ENDDO |
| 378 |
c$$$ GOTO 22 |
| 379 |
c$$$ ENDIF |
| 380 |
c$$$ 200 XOUT(I)=VOUT(1) |
| 381 |
c$$$ YOUT(I)=VOUT(2) |
| 382 |
c$$$ ZIN(I)=VOUT(3) |
| 383 |
c$$$ IF(VOUT(3).ne.0)THEN |
| 384 |
c$$$ THXOUT(I)=DATAN(VOUT(4)/VOUT(6))*180./ACOS(-1.) |
| 385 |
c$$$ THYOUT(I)=DATAN(VOUT(5)/VOUT(6))*180./ACOS(-1.) |
| 386 |
c$$$ ENDIF |
| 387 |
c$$$ TLOUT(I) = L |
| 388 |
c$$$ ENDDO |
| 389 |
c$$$ |
| 390 |
RETURN |
| 391 |
END |
| 392 |
|
| 393 |
************************************************************************ |
| 394 |
* |
| 395 |
* |
| 396 |
* |
| 397 |
* |
| 398 |
************************************************************************ |
| 399 |
SUBROUTINE DOTRACK(NPOINT,ZIN,XOUT,YOUT,AL_P,IFAIL) |
| 400 |
|
| 401 |
IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
| 402 |
|
| 403 |
* ----------------------------------------------- |
| 404 |
* I/O parameters |
| 405 |
PARAMETER (NPOINT_MAX=100) |
| 406 |
DIMENSION ZIN(NPOINT_MAX) |
| 407 |
DIMENSION XOUT(NPOINT_MAX),YOUT(NPOINT_MAX) |
| 408 |
DIMENSION THXOUT(NPOINT_MAX),THYOUT(NPOINT_MAX) |
| 409 |
DIMENSION TLOUT(NPOINT_MAX) |
| 410 |
DIMENSION AL_P(5) |
| 411 |
* ----------------------------------------------- |
| 412 |
|
| 413 |
CALL DOTRACK2(NPOINT,ZIN,XOUT,YOUT,THXOUT,THYOUT,TLOUT,AL_P,IFAIL) |
| 414 |
|
| 415 |
ccc |
| 416 |
ccc OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD-OLD |
| 417 |
ccc |
| 418 |
c$$$ DIMENSION VECT(7),VECTINI(7),VOUT(7) |
| 419 |
c$$$ DATA TOLL/1.d-8/ |
| 420 |
c$$$* tolerance in reaching the next plane during the tracking procedure |
| 421 |
c$$$* ----------------------------------------------- |
| 422 |
c$$$* I/O parameters |
| 423 |
c$$$ PARAMETER (NPOINT_MAX=100) |
| 424 |
c$$$ DIMENSION ZIN(NPOINT_MAX) |
| 425 |
c$$$ DIMENSION XOUT(NPOINT_MAX),YOUT(NPOINT_MAX) |
| 426 |
c$$$ DIMENSION AL_P(5) |
| 427 |
c$$$* ----------------------------------------------- |
| 428 |
c$$$ DATA ZINI/23.5/ !z coordinate of the reference plane |
| 429 |
c$$$ |
| 430 |
c$$$* ================================================================== |
| 431 |
c$$$* divide the track in two parts: below and above the reference plane |
| 432 |
c$$$* ================================================================== |
| 433 |
c$$$ IUPDOWN=0 |
| 434 |
c$$$ DO I=1,NPOINT |
| 435 |
c$$$ IF(ZIN(I).LT.ZINI)THEN |
| 436 |
c$$$ if(i.ne.1)IUPDOWN=I |
| 437 |
c$$$ GOTO 88 |
| 438 |
c$$$ ENDIF |
| 439 |
c$$$ IUPDOWN=NPOINT+1 |
| 440 |
c$$$ ENDDO |
| 441 |
c$$$ 88 CONTINUE |
| 442 |
c$$$ |
| 443 |
c$$$* ================================================================== |
| 444 |
c$$$* track from reference plane DOWN |
| 445 |
c$$$* ================================================================== |
| 446 |
c$$$* parameters for GRKUTA |
| 447 |
c$$$ IF(AL_P(5).NE.0) CHARGE=AL_P(5)/DABS(AL_P(5)) |
| 448 |
c$$$ IF(AL_P(5).EQ.0) CHARGE=1. |
| 449 |
c$$$ VOUT(1)=AL_P(1) |
| 450 |
c$$$ VOUT(2)=AL_P(2) |
| 451 |
c$$$ VOUT(3)=ZINI |
| 452 |
c$$$ VOUT(4)=AL_P(3)*DCOS(AL_P(4)) |
| 453 |
c$$$ VOUT(5)=AL_P(3)*DSIN(AL_P(4)) |
| 454 |
c$$$ VOUT(6)=-1.*DSQRT(1.-AL_P(3)**2) |
| 455 |
c$$$ IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 456 |
c$$$ IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 457 |
c$$$ DO I=MAX(IUPDOWN,1),NPOINT |
| 458 |
c$$$ step=vout(3)-zin(i) |
| 459 |
c$$$c$$$ print*,'DOWN ',i,' - Track from ', |
| 460 |
c$$$c$$$ $ vout(3),' to ',zin(i),' step ',step |
| 461 |
c$$$ 10 DO J=1,7 |
| 462 |
c$$$ VECT(J)=VOUT(J) |
| 463 |
c$$$ VECTINI(J)=VOUT(J) |
| 464 |
c$$$ ENDDO |
| 465 |
c$$$ 11 continue |
| 466 |
c$$$ CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 467 |
c$$$ IF(VOUT(3).GT.VECT(3)) THEN |
| 468 |
c$$$ IFAIL=1 |
| 469 |
c$$$c$$$ PRINT *,'=== WARNING ===> tracciamento invertito (DOWN)' |
| 470 |
c$$$c$$$ print*,'charge',charge |
| 471 |
c$$$c$$$ print*,'vect',vect |
| 472 |
c$$$c$$$ print*,'vout',vout |
| 473 |
c$$$c$$$ print*,'step',step |
| 474 |
c$$$ RETURN |
| 475 |
c$$$ ENDIF |
| 476 |
c$$$ Z=VOUT(3) |
| 477 |
c$$$ IF(Z.LE.ZIN(I)+TOLL.AND.Z.GE.ZIN(I)-TOLL) GOTO 100 |
| 478 |
c$$$ IF(Z.GT.ZIN(I)+TOLL) GOTO 10 |
| 479 |
c$$$ IF(Z.LE.ZIN(I)-TOLL) THEN |
| 480 |
c$$$ STEP=STEP*(ZIN(I)-VECT(3))/(Z-VECT(3)) |
| 481 |
c$$$ DO J=1,7 |
| 482 |
c$$$ VECT(J)=VECTINI(J) |
| 483 |
c$$$ ENDDO |
| 484 |
c$$$ GOTO 11 |
| 485 |
c$$$ ENDIF |
| 486 |
c$$$ 100 XOUT(I)=VOUT(1) |
| 487 |
c$$$ YOUT(I)=VOUT(2) |
| 488 |
c$$$ ZIN(I)=VOUT(3) |
| 489 |
c$$$* THXOUT(I)= |
| 490 |
c$$$* THYOUT(I)= |
| 491 |
c$$$ ENDDO |
| 492 |
c$$$ |
| 493 |
c$$$ |
| 494 |
c$$$ |
| 495 |
c$$$* ================================================================== |
| 496 |
c$$$* track from reference plane UP |
| 497 |
c$$$* ================================================================== |
| 498 |
c$$$* parameters for GRKUTA: |
| 499 |
c$$$* -opposite charge |
| 500 |
c$$$* -opposite momentum direction |
| 501 |
c$$$ IF(AL_P(5).NE.0) CHARGE=-AL_P(5)/DABS(AL_P(5)) |
| 502 |
c$$$ IF(AL_P(5).EQ.0) CHARGE=-1. |
| 503 |
c$$$ VOUT(1)=AL_P(1) |
| 504 |
c$$$ VOUT(2)=AL_P(2) |
| 505 |
c$$$ VOUT(3)=ZINI |
| 506 |
c$$$ VOUT(4)=-AL_P(3)*DCOS(AL_P(4)) |
| 507 |
c$$$ VOUT(5)=-AL_P(3)*DSIN(AL_P(4)) |
| 508 |
c$$$ VOUT(6)=1.*DSQRT(1.-AL_P(3)**2) |
| 509 |
c$$$ IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 510 |
c$$$ IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 511 |
c$$$ DO I=MIN((IUPDOWN-1),NPOINT),1,-1 |
| 512 |
c$$$ step=vout(3)-zin(i) |
| 513 |
c$$$ step = -step |
| 514 |
c$$$c$$$ print*,'UP ',i,' - Track from ', |
| 515 |
c$$$c$$$ $ vout(3),' to ',zin(i),' step ',step |
| 516 |
c$$$ 20 DO J=1,7 |
| 517 |
c$$$ VECT(J)=VOUT(J) |
| 518 |
c$$$ VECTINI(J)=VOUT(J) |
| 519 |
c$$$ ENDDO |
| 520 |
c$$$ 22 continue |
| 521 |
c$$$ CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 522 |
c$$$ IF(VOUT(3).LT.VECT(3)) THEN |
| 523 |
c$$$ IFAIL=1 |
| 524 |
c$$$c$$$ PRINT *,'=== WARNING ===> tracciamento invertito (UP)' |
| 525 |
c$$$c$$$ print*,'charge',charge |
| 526 |
c$$$c$$$ print*,'vect',vect |
| 527 |
c$$$c$$$ print*,'vout',vout |
| 528 |
c$$$c$$$ print*,'step',step |
| 529 |
c$$$ RETURN |
| 530 |
c$$$ ENDIF |
| 531 |
c$$$ Z=VOUT(3) |
| 532 |
c$$$ IF(Z.LE.ZIN(I)+TOLL.AND.Z.GE.ZIN(I)-TOLL) GOTO 200 |
| 533 |
c$$$ IF(Z.LT.ZIN(I)-TOLL) GOTO 20 |
| 534 |
c$$$ IF(Z.GE.ZIN(I)+TOLL) THEN |
| 535 |
c$$$ STEP=STEP*(ZIN(I)-VECT(3))/(Z-VECT(3)) |
| 536 |
c$$$ DO J=1,7 |
| 537 |
c$$$ VECT(J)=VECTINI(J) |
| 538 |
c$$$ ENDDO |
| 539 |
c$$$ GOTO 22 |
| 540 |
c$$$ ENDIF |
| 541 |
c$$$ 200 XOUT(I)=VOUT(1) |
| 542 |
c$$$ YOUT(I)=VOUT(2) |
| 543 |
c$$$ ZIN(I)=VOUT(3) |
| 544 |
c$$$ |
| 545 |
c$$$ ENDDO |
| 546 |
|
| 547 |
RETURN |
| 548 |
END |
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