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mocchiut |
1.1 |
************************************************************************ |
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* |
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* subroutine to evaluate the vector alfa (AL) |
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* which minimizes CHI^2 |
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* |
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* - modified from mini.f in order to call differente chi^2 routine. |
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* The new one includes also single clusters: in this case |
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* the residual is defined as the distance between the track and the |
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* segment AB associated to the single cluster. |
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* |
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* |
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************************************************************************ |
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pam-fi |
1.3 |
SUBROUTINE MINI2(ISTEP,IFAIL,IPRINT) |
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mocchiut |
1.1 |
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IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
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include 'commontracker.f' !tracker general common |
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include 'common_mini_2.f' !common for the tracking procedure |
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pam-fi |
1.2 |
c logical DEBUG |
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c common/dbg/DEBUG |
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mocchiut |
1.1 |
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parameter (inf=1.e8) !just a huge number... |
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c------------------------------------------------------------------------ |
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c variables used in the tracking procedure (mini and its subroutines) |
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c |
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c N.B.: in mini & C. (and in the following block of variables too) |
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c the plane ordering is reversed in respect of normal |
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c ordering, but they maintain their Z coordinates. so plane number 1 is |
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c the first one that a particle meets, and its Z coordinate is > 0 |
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c------------------------------------------------------------------------ |
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pam-fi |
1.3 |
DATA ZINI/23.5/ !!! ***PP*** to be changed !z coordinate of the reference plane |
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mocchiut |
1.1 |
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pam-fi |
1.3 |
c DATA XGOOD,YGOOD/nplanes*1.,nplanes*1./ !planes to be used in the tracking |
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mocchiut |
1.1 |
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DATA STEPAL/5*1.d-7/ !alpha vector step |
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DATA ISTEPMAX/100/ !maximum number of steps in the chi^2 minimization |
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DATA TOLL/1.d-8/ !tolerance in reaching the next plane during |
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* !the tracking procedure |
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DATA STEPMAX/100./ !maximum number of steps in the trackin gprocess |
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c DATA ALMAX/inf,inf,inf,inf,0.25e2/ !limits on alpha vector components |
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c DATA ALMIN/-inf,-inf,-inf,-inf,-0.25e2/ !" |
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DATA ALMAX/inf,inf,1.,inf,0.25e2/ !limits on alpha vector components |
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DATA ALMIN/-inf,-inf,-1.,-inf,-0.25e2/ !" |
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DIMENSION DAL(5) !increment of vector alfa |
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pam-fi |
1.3 |
DIMENSION CHI2DD_R(4,4),CHI2D_R(4) !hessiano e gradiente di chi2 |
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mocchiut |
1.1 |
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INTEGER IFLAG |
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c-------------------------------------------------------- |
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c IFLAG =1 ---- chi2 derivatives computed by using |
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c incremental ratios and posxyz.f |
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c IFLAG =2 ---- the approximation of Golden is used |
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c (see chisq.f) |
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c |
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c NB: the two metods gives equivalent results BUT |
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c method 2 is faster!! |
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c-------------------------------------------------------- |
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pam-fi |
1.3 |
DATA IFLAG/2/ |
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LOGICAL TRKDEBUG |
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COMMON/TRKD/TRKDEBUG |
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IF(IPRINT.EQ.1) THEN |
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TRKDEBUG = .TRUE. |
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ELSE |
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TRKDEBUG = .FALSE. |
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ENDIF |
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mocchiut |
1.1 |
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* ---------------------------------------------------------- |
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* define ALTOL(5) ---> tolerances on state vector |
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* |
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* ---------------------------------------------------------- |
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FACT=10. !scale factor to define |
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!tolerance on alfa |
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ALTOL(1)=RESX(1)/FACT !al(1) = x |
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ALTOL(2)=RESY(1)/FACT !al(2) = y |
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ALTOL(3)=DSQRT(RESX(1)**2 !al(3)=sin(theta) |
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$ +RESY(1)**2)/44.51/FACT |
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ALTOL(4)=ALTOL(3) !al(4)=phi |
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c deflection error (see PDG) |
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DELETA1=0.01*RESX(1)/0.3/0.4/0.4451**2*SQRT(720./(6.+4.)) |
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DELETA2=0.016/0.3/0.4/0.4451*SQRT(0.4451/9.36) |
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* ---------------------------------------------------------- |
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* |
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ISTEP=0 !num. steps to minimize chi^2 |
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JFAIL=0 !error flag |
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pam-fi |
1.3 |
* |
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* ----------------------- |
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* START MINIMIZATION LOOP |
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* ----------------------- |
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10 ISTEP=ISTEP+1 !<<<<<<<<<<<<<< NEW STEP !! |
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mocchiut |
1.1 |
CALL CHISQ(IFLAG,JFAIL) !chi^2 and its derivatives |
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IF(JFAIL.NE.0) THEN |
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IFAIL=1 |
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pam-fi |
1.3 |
CHI2=-9999. |
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if(TRKDEBUG) |
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$ PRINT *,'*** ERROR in mini *** wrong CHISQ' |
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mocchiut |
1.1 |
RETURN |
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ENDIF |
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pam-fi |
1.3 |
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* CHI2_P=CHI2 |
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mocchiut |
1.1 |
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c print*,'@@@@@ ',istep,' - ',al |
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pam-fi |
1.3 |
COST=1e-7 |
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mocchiut |
1.1 |
DO I=1,5 |
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DO J=1,5 |
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CHI2DD(I,J)=CHI2DD(I,J)*COST |
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ENDDO |
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CHI2D(I)=CHI2D(I)*COST |
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ENDDO |
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pam-fi |
1.3 |
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| 119 |
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IF(PFIXED.EQ.0.) THEN |
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| 121 |
mocchiut |
1.1 |
*------------------------------------------------------------* |
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* track fitting with FREE deflection |
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*------------------------------------------------------------* |
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pam-fi |
1.3 |
CALL DSFACT(5,CHI2DD,5,IFA,DET,JFA) !CHI2DD matrix determinant |
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IF(IFA.NE.0) THEN !not positive-defined |
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if(TRKDEBUG)then |
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PRINT *, |
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$ '*** ERROR in mini ***'// |
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$ 'on matrix inversion (not pos-def)' |
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$ ,DET |
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endif |
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IF(CHI2.EQ.0) CHI2=-9999. |
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IF(CHI2.GT.0) CHI2=-CHI2 |
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IFAIL=1 |
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RETURN |
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ENDIF |
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CALL DSFINV(5,CHI2DD,5) !CHI2DD matrix inversion |
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* ******************************************* |
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* find new value of AL-pha |
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* |
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DO I=1,5 |
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DAL(I)=0. |
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DO J=1,5 |
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DAL(I)=DAL(I)-CHI2DD(I,J)*CHI2D(J) |
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COV(I,J)=2.*COST*CHI2DD(I,J) |
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ENDDO |
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ENDDO |
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DO I=1,5 |
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AL(I)=AL(I)+DAL(I) |
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ENDDO |
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*------------------------------------------------------------* |
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* track fitting with FIXED deflection |
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*------------------------------------------------------------* |
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ELSE |
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AL(5)=1./PFIXED |
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DO I=1,4 |
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CHI2D_R(I)=CHI2D(I) |
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DO J=1,4 |
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CHI2DD_R(I,J)=CHI2DD(I,J) |
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ENDDO |
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ENDDO |
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CALL DSFACT(4,CHI2DD_R,4,IFA,DET,JFA) |
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IF(IFA.NE.0) THEN |
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if(TRKDEBUG)then |
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PRINT *, |
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$ '*** ERROR in mini ***'// |
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$ 'on matrix inversion (not pos-def)' |
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$ ,DET |
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endif |
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IF(CHI2.EQ.0) CHI2=-9999. |
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IF(CHI2.GT.0) CHI2=-CHI2 |
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IFAIL=1 |
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RETURN |
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ENDIF |
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CALL DSFINV(4,CHI2DD_R,4) |
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DO I=1,4 |
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DAL(I)=0. |
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DO J=1,4 |
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DAL(I)=DAL(I)-CHI2DD_R(I,J)*CHI2D_R(J) |
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COV(I,J)=2.*COST*CHI2DD_R(I,J) |
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ENDDO |
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ENDDO |
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DAL(5)=0. |
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DO I=1,4 |
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AL(I)=AL(I)+DAL(I) |
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ENDDO |
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mocchiut |
1.1 |
ENDIF |
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pam-fi |
1.3 |
*------------------------------------------------------------* |
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* ---------------------------------------------------- * |
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*------------------------------------------------------------* |
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mocchiut |
1.1 |
* ******************************************* |
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* check parameter bounds: |
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DO I=1,5 |
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IF(AL(I).GT.ALMAX(I).OR.AL(I).LT.ALMIN(I))THEN |
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pam-fi |
1.3 |
if(TRKDEBUG)then |
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PRINT*,' *** WARNING in mini *** ' |
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mocchiut |
1.1 |
PRINT*,'MINI_2 ==> AL(',I,') out of range' |
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PRINT*,' value: ',AL(I), |
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$ ' limits: ',ALMIN(I),ALMAX(I) |
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print*,'istep ',istep |
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endif |
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pam-fi |
1.3 |
IF(CHI2.EQ.0) CHI2=-9999. |
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IF(CHI2.GT.0) CHI2=-CHI2 |
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mocchiut |
1.1 |
IFAIL=1 |
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RETURN |
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ENDIF |
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ENDDO |
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pam-fi |
1.3 |
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| 209 |
mocchiut |
1.1 |
* check number of steps: |
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IF(ISTEP.gt.ISTEPMAX) then |
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IFAIL=1 |
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pam-fi |
1.3 |
if(TRKDEBUG) |
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$ PRINT *,'*** WARNING in mini *** ISTEP.GT.ISTEPMAX=', |
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$ ISTEPMAX |
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mocchiut |
1.1 |
goto 11 |
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endif |
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* --------------------------------------------- |
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* evaluate deflection tolerance on the basis of |
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* estimated deflection |
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* --------------------------------------------- |
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ALTOL(5)=DSQRT(DELETA1**2+DELETA2**2*AL(5)**2)/FACT |
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*---- check tolerances: |
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DO I=1,5 |
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IF(ABS(DAL(I)).GT.ALTOL(I))GOTO 10 !>>>> new step! |
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ENDDO |
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pam-fi |
1.3 |
* new estimate of chi^2: |
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JFAIL=0 !error flag |
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CALL CHISQ(IFLAG,JFAIL) !chi^2 and its derivatives |
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IF(JFAIL.NE.0) THEN |
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IFAIL=1 |
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if(TRKDEBUG)THEN |
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CHI2=-9999. |
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if(TRKDEBUG) |
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$ PRINT *,'*** ERROR in mini *** wrong CHISQ' |
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ENDIF |
| 237 |
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RETURN |
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ENDIF |
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COST=1e-7 |
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DO I=1,5 |
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DO J=1,5 |
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CHI2DD(I,J)=CHI2DD(I,J)*COST |
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ENDDO |
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CHI2D(I)=CHI2D(I)*COST |
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ENDDO |
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IF(PFIXED.EQ.0.) THEN |
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CALL DSFACT(5,CHI2DD,5,IFA,DET,JFA) !CHI2DD matrix determinant |
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IF(IFA.NE.0) THEN !not positive-defined |
| 249 |
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if(TRKDEBUG)then |
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PRINT *, |
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$ '*** ERROR in mini ***'// |
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$ 'on matrix inversion (not pos-def)' |
| 253 |
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$ ,DET |
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endif |
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IF(CHI2.EQ.0) CHI2=-9999. |
| 256 |
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IF(CHI2.GT.0) CHI2=-CHI2 |
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IFAIL=1 |
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RETURN |
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ENDIF |
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CALL DSFINV(5,CHI2DD,5) !CHI2DD matrix inversion |
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DO I=1,5 |
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DAL(I)=0. |
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DO J=1,5 |
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COV(I,J)=2.*COST*CHI2DD(I,J) |
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ENDDO |
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ENDDO |
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ELSE |
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DO I=1,4 |
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CHI2D_R(I)=CHI2D(I) |
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DO J=1,4 |
| 271 |
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CHI2DD_R(I,J)=CHI2DD(I,J) |
| 272 |
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ENDDO |
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ENDDO |
| 274 |
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CALL DSFACT(4,CHI2DD_R,4,IFA,DET,JFA) |
| 275 |
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IF(IFA.NE.0) THEN |
| 276 |
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if(TRKDEBUG)then |
| 277 |
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PRINT *, |
| 278 |
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$ '*** ERROR in mini ***'// |
| 279 |
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$ 'on matrix inversion (not pos-def)' |
| 280 |
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$ ,DET |
| 281 |
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endif |
| 282 |
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IF(CHI2.EQ.0) CHI2=-9999. |
| 283 |
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IF(CHI2.GT.0) CHI2=-CHI2 |
| 284 |
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IFAIL=1 |
| 285 |
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RETURN |
| 286 |
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ENDIF |
| 287 |
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CALL DSFINV(4,CHI2DD_R,4) |
| 288 |
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DO I=1,4 |
| 289 |
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DAL(I)=0. |
| 290 |
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DO J=1,4 |
| 291 |
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COV(I,J)=2.*COST*CHI2DD_R(I,J) |
| 292 |
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ENDDO |
| 293 |
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ENDDO |
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ENDIF |
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***************************** |
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mocchiut |
1.1 |
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| 297 |
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* ------------------------------------ |
| 298 |
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* Number of Degree Of Freedom |
| 299 |
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ndof=0 |
| 300 |
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do ip=1,nplanes |
| 301 |
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ndof=ndof |
| 302 |
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$ +int(xgood(ip)) |
| 303 |
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$ +int(ygood(ip)) |
| 304 |
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enddo |
| 305 |
pam-fi |
1.3 |
if(pfixed.eq.0.) ndof=ndof-5 ! ***PP*** |
| 306 |
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if(pfixed.ne.0.) ndof=ndof-4 ! ***PP*** |
| 307 |
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if(ndof.le.0.) then |
| 308 |
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ndof = 1 |
| 309 |
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if(TRKDEBUG) |
| 310 |
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$ print*,'*** WARNING *** in mini n.dof = 0 (set to 1)' |
| 311 |
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endif |
| 312 |
mocchiut |
1.1 |
* ------------------------------------ |
| 313 |
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* Reduced chi^2 |
| 314 |
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CHI2 = CHI2/dble(ndof) |
| 315 |
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| 316 |
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11 CONTINUE |
| 317 |
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| 318 |
pam-fi |
1.3 |
NSTEP=ISTEP ! ***PP*** |
| 319 |
mocchiut |
1.1 |
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| 320 |
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RETURN |
| 321 |
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END |
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| 323 |
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****************************************************************************** |
| 324 |
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* |
| 325 |
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* routine to compute chi^2 and its derivatives |
| 326 |
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* |
| 327 |
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* |
| 328 |
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* (modified in respect to the previous one in order to include |
| 329 |
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* single clusters. In this case the residual is evaluated by |
| 330 |
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* calculating the distance between the track intersection and the |
| 331 |
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* segment AB associated to the single cluster) |
| 332 |
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* |
| 333 |
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****************************************************************************** |
| 334 |
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| 335 |
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SUBROUTINE CHISQ(IFLAG,IFAIL) |
| 336 |
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| 337 |
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IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
| 338 |
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| 339 |
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include 'commontracker.f' !tracker general common |
| 340 |
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include 'common_mini_2.f' !common for the tracking procedure |
| 341 |
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| 342 |
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DIMENSION XV2(nplanes),YV2(nplanes),XV1(nplanes),YV1(nplanes) |
| 343 |
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$ ,XV0(nplanes),YV0(nplanes) |
| 344 |
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DIMENSION AL_P(5) |
| 345 |
pam-fi |
1.3 |
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| 346 |
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LOGICAL TRKDEBUG |
| 347 |
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COMMON/TRKD/TRKDEBUG |
| 348 |
mocchiut |
1.1 |
* |
| 349 |
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* chi^2 computation |
| 350 |
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* |
| 351 |
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DO I=1,5 |
| 352 |
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AL_P(I)=AL(I) |
| 353 |
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ENDDO |
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JFAIL=0 !error flag |
| 355 |
|
|
CALL POSXYZ(AL_P,JFAIL) !track intersection with tracking planes |
| 356 |
|
|
IF(JFAIL.NE.0) THEN |
| 357 |
pam-fi |
1.3 |
IF(TRKDEBUG) |
| 358 |
|
|
$ PRINT *,'CHISQ ==> error from trk routine POSXYZ !!' |
| 359 |
mocchiut |
1.1 |
IFAIL=1 |
| 360 |
|
|
RETURN |
| 361 |
|
|
ENDIF |
| 362 |
|
|
DO I=1,nplanes |
| 363 |
|
|
XV0(I)=XV(I) |
| 364 |
|
|
YV0(I)=YV(I) |
| 365 |
|
|
ENDDO |
| 366 |
|
|
* ------------------------------------------------ |
| 367 |
|
|
c$$$ CHI2=0. |
| 368 |
|
|
c$$$ DO I=1,nplanes |
| 369 |
|
|
c$$$ CHI2=CHI2 |
| 370 |
|
|
c$$$ + +(XV(I)-XM(I))**2/RESX(i)**2 *XGOOD(I)*YGOOD(I) |
| 371 |
|
|
c$$$ + +(YV(I)-YM(I))**2/RESY(i)**2 *YGOOD(I)*XGOOD(I) |
| 372 |
|
|
c$$$ ENDDO |
| 373 |
|
|
* --------------------------------------------------------- |
| 374 |
|
|
* For planes with only a X or Y-cl included, instead of |
| 375 |
|
|
* a X-Y couple, the residual for chi^2 calculation is |
| 376 |
|
|
* evaluated by finding the point x-y, along the segment AB, |
| 377 |
|
|
* closest to the track. |
| 378 |
|
|
* The X or Y coordinate, respectivelly for X and Y-cl, is |
| 379 |
|
|
* then assigned to XM or YM, which is then considered the |
| 380 |
|
|
* measured position of the cluster. |
| 381 |
|
|
* --------------------------------------------------------- |
| 382 |
|
|
CHI2=0. |
| 383 |
|
|
DO I=1,nplanes |
| 384 |
|
|
IF(XGOOD(I).EQ.1.AND.YGOOD(I).EQ.0)THEN !X-cl |
| 385 |
|
|
BETA = (XM_B(I)-XM_A(I))/(YM_B(I)-YM_A(I)) |
| 386 |
|
|
ALFA = XM_A(I) - BETA * YM_A(I) |
| 387 |
|
|
YM(I) = ( YV(I) + BETA*XV(I) - BETA*ALFA )/(1+BETA**2) |
| 388 |
|
|
if(YM(I).lt.dmin1(YM_A(I),YM_B(I))) |
| 389 |
|
|
$ YM(I)=dmin1(YM_A(I),YM_B(I)) |
| 390 |
|
|
if(YM(I).gt.dmax1(YM_A(I),YM_B(I))) |
| 391 |
|
|
$ YM(I)=dmax1(YM_A(I),YM_B(I)) |
| 392 |
|
|
XM(I) = ALFA + BETA * YM(I) !<<<< measured coordinates |
| 393 |
|
|
ELSEIF(XGOOD(I).EQ.0.AND.YGOOD(I).EQ.1)THEN !Y-cl |
| 394 |
|
|
BETA = (YM_B(I)-YM_A(I))/(XM_B(I)-XM_A(I)) |
| 395 |
|
|
ALFA = YM_A(I) - BETA * XM_A(I) |
| 396 |
|
|
XM(I) = ( XV(I) + BETA*YV(I) - BETA*ALFA )/(1+BETA**2) |
| 397 |
|
|
if(XM(I).lt.dmin1(XM_A(I),XM_B(I))) |
| 398 |
|
|
$ XM(I)=dmin1(XM_A(I),XM_B(I)) |
| 399 |
|
|
if(XM(I).gt.dmax1(XM_A(I),XM_B(I))) |
| 400 |
|
|
$ XM(I)=dmax1(XM_A(I),XM_B(I)) |
| 401 |
|
|
YM(I) = ALFA + BETA * XM(I) !<<<< measured coordinates |
| 402 |
|
|
ENDIF |
| 403 |
|
|
CHI2=CHI2 |
| 404 |
|
|
+ +(XV(I)-XM(I))**2/RESX(i)**2 *( XGOOD(I)*YGOOD(I) ) |
| 405 |
|
|
+ +(YV(I)-YM(I))**2/RESY(i)**2 *( YGOOD(I)*XGOOD(I) ) |
| 406 |
|
|
+ +((XV(I)-XM(I))**2+(YV(I)-YM(I))**2)/RESX(i)**2 |
| 407 |
|
|
+ *( XGOOD(I)*(1-YGOOD(I)) ) |
| 408 |
|
|
+ +((XV(I)-XM(I))**2+(YV(I)-YM(I))**2)/RESY(i)**2 |
| 409 |
|
|
+ *( (1-XGOOD(I))*YGOOD(I) ) |
| 410 |
|
|
ENDDO |
| 411 |
|
|
* ------------------------------------------------ |
| 412 |
|
|
* |
| 413 |
|
|
* calculation of derivatives (dX/dAL_fa and dY/dAL_fa) |
| 414 |
|
|
* |
| 415 |
|
|
* ////////////////////////////////////////////////// |
| 416 |
|
|
* METHOD 1 -- incremental ratios |
| 417 |
|
|
* ////////////////////////////////////////////////// |
| 418 |
|
|
|
| 419 |
|
|
IF(IFLAG.EQ.1) THEN |
| 420 |
|
|
|
| 421 |
|
|
DO J=1,5 |
| 422 |
|
|
DO JJ=1,5 |
| 423 |
|
|
AL_P(JJ)=AL(JJ) |
| 424 |
|
|
ENDDO |
| 425 |
|
|
AL_P(J)=AL_P(J)+STEPAL(J)/2. |
| 426 |
|
|
JFAIL=0 |
| 427 |
|
|
CALL POSXYZ(AL_P,JFAIL) |
| 428 |
|
|
IF(JFAIL.NE.0) THEN |
| 429 |
pam-fi |
1.3 |
IF(TRKDEBUG) |
| 430 |
|
|
*23456789012345678901234567890123456789012345678901234567890123456789012 |
| 431 |
|
|
$ PRINT *,'CHISQ ==> error from trk routine POSXYZ' |
| 432 |
mocchiut |
1.1 |
IFAIL=1 |
| 433 |
|
|
RETURN |
| 434 |
|
|
ENDIF |
| 435 |
|
|
DO I=1,nplanes |
| 436 |
|
|
XV2(I)=XV(I) |
| 437 |
|
|
YV2(I)=YV(I) |
| 438 |
|
|
ENDDO |
| 439 |
|
|
AL_P(J)=AL_P(J)-STEPAL(J) |
| 440 |
|
|
JFAIL=0 |
| 441 |
|
|
CALL POSXYZ(AL_P,JFAIL) |
| 442 |
|
|
IF(JFAIL.NE.0) THEN |
| 443 |
pam-fi |
1.3 |
IF(TRKDEBUG) |
| 444 |
|
|
$ PRINT *,'CHISQ ==> error from trk routine POSXYZ' |
| 445 |
mocchiut |
1.1 |
IFAIL=1 |
| 446 |
|
|
RETURN |
| 447 |
|
|
ENDIF |
| 448 |
|
|
DO I=1,nplanes |
| 449 |
|
|
XV1(I)=XV(I) |
| 450 |
|
|
YV1(I)=YV(I) |
| 451 |
|
|
ENDDO |
| 452 |
|
|
DO I=1,nplanes |
| 453 |
|
|
DXDAL(I,J)=(XV2(I)-XV1(I))/STEPAL(J) |
| 454 |
|
|
DYDAL(I,J)=(YV2(I)-YV1(I))/STEPAL(J) |
| 455 |
|
|
ENDDO |
| 456 |
|
|
ENDDO |
| 457 |
|
|
|
| 458 |
|
|
ENDIF |
| 459 |
|
|
|
| 460 |
|
|
* ////////////////////////////////////////////////// |
| 461 |
|
|
* METHOD 2 -- Bob Golden |
| 462 |
|
|
* ////////////////////////////////////////////////// |
| 463 |
|
|
|
| 464 |
|
|
IF(IFLAG.EQ.2) THEN |
| 465 |
|
|
|
| 466 |
|
|
DO I=1,nplanes |
| 467 |
|
|
DXDAL(I,1)=1. |
| 468 |
|
|
DYDAL(I,1)=0. |
| 469 |
|
|
|
| 470 |
|
|
DXDAL(I,2)=0. |
| 471 |
|
|
DYDAL(I,2)=1. |
| 472 |
|
|
|
| 473 |
|
|
COSTHE=DSQRT(1.-AL(3)**2) |
| 474 |
|
|
IF(COSTHE.EQ.0.) THEN |
| 475 |
pam-fi |
1.3 |
IF(TRKDEBUG)PRINT *,'=== WARNING ===> COSTHE=0' |
| 476 |
|
|
IFAIL=1 |
| 477 |
|
|
RETURN |
| 478 |
mocchiut |
1.1 |
ENDIF |
| 479 |
|
|
|
| 480 |
|
|
DXDAL(I,3)=(ZINI-ZM(I))*DCOS(AL(4))/COSTHE**3 |
| 481 |
|
|
DYDAL(I,3)=(ZINI-ZM(I))*DSIN(AL(4))/COSTHE**3 |
| 482 |
|
|
|
| 483 |
|
|
DXDAL(I,4)=-AL(3)*(ZINI-ZM(I))*DSIN(AL(4))/COSTHE |
| 484 |
|
|
DYDAL(I,4)=AL(3)*(ZINI-ZM(I))*DCOS(AL(4))/COSTHE |
| 485 |
|
|
|
| 486 |
|
|
IF(AL(5).NE.0.) THEN |
| 487 |
|
|
DXDAL(I,5)= |
| 488 |
|
|
+ (XV(I)-(AL(1)+AL(3)/COSTHE*(ZINI-ZM(I)) |
| 489 |
|
|
+ *DCOS(AL(4))))/AL(5) |
| 490 |
|
|
DYDAL(I,5)= |
| 491 |
|
|
+ (YV(I)-(AL(2)+AL(3)/COSTHE*(ZINI-ZM(I)) |
| 492 |
|
|
+ *DSIN(AL(4))))/AL(5) |
| 493 |
|
|
ELSE |
| 494 |
|
|
DXDAL(I,5)=100.*( 0.25 *0.3*0.4*(0.01*(ZINI-ZM(I)))**2 ) |
| 495 |
|
|
DYDAL(I,5)=0. |
| 496 |
|
|
ENDIF |
| 497 |
|
|
|
| 498 |
|
|
ENDDO |
| 499 |
|
|
ENDIF |
| 500 |
|
|
* |
| 501 |
|
|
* x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x |
| 502 |
|
|
* >>> CHI2D evaluation |
| 503 |
|
|
* |
| 504 |
|
|
DO J=1,5 |
| 505 |
|
|
CHI2D(J)=0. |
| 506 |
|
|
DO I=1,nplanes |
| 507 |
|
|
CHI2D(J)=CHI2D(J) |
| 508 |
|
|
+ +2.*(XV0(I)-XM(I))/RESX(i)**2*DXDAL(I,J) *XGOOD(I) |
| 509 |
|
|
+ +2.*(YV0(I)-YM(I))/RESY(i)**2*DYDAL(I,J) *YGOOD(I) |
| 510 |
|
|
ENDDO |
| 511 |
|
|
ENDDO |
| 512 |
|
|
* |
| 513 |
|
|
* >>> CHI2DD evaluation |
| 514 |
|
|
* |
| 515 |
|
|
DO I=1,5 |
| 516 |
|
|
DO J=1,5 |
| 517 |
|
|
CHI2DD(I,J)=0. |
| 518 |
|
|
DO K=1,nplanes |
| 519 |
|
|
CHI2DD(I,J)=CHI2DD(I,J) |
| 520 |
|
|
+ +2.*DXDAL(K,I)*DXDAL(K,J)/RESX(k)**2 *XGOOD(K) |
| 521 |
|
|
+ +2.*DYDAL(K,I)*DYDAL(K,J)/RESY(k)**2 *YGOOD(K) |
| 522 |
|
|
ENDDO |
| 523 |
|
|
ENDDO |
| 524 |
|
|
ENDDO |
| 525 |
|
|
* x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x-x |
| 526 |
|
|
|
| 527 |
|
|
RETURN |
| 528 |
|
|
END |
| 529 |
|
|
|
| 530 |
|
|
|
| 531 |
|
|
***************************************************************** |
| 532 |
|
|
* |
| 533 |
|
|
* Routine to compute the track intersection points |
| 534 |
|
|
* on the tracking-system planes, given the track parameters |
| 535 |
|
|
* |
| 536 |
|
|
* The routine is based on GRKUTA, which computes the |
| 537 |
|
|
* trajectory of a charged particle in a magnetic field |
| 538 |
|
|
* by solving the equatins of motion with Runge-Kuta method. |
| 539 |
|
|
* |
| 540 |
|
|
* Variables that have to be assigned when the subroutine |
| 541 |
|
|
* is called are: |
| 542 |
|
|
* |
| 543 |
|
|
* ZM(1,NPLANES) ----> z coordinates of the planes |
| 544 |
|
|
* AL_P(1,5) ----> track-parameter vector |
| 545 |
|
|
* |
| 546 |
|
|
* ----------------------------------------------------------- |
| 547 |
|
|
* NB !!! |
| 548 |
|
|
* The routine works properly only if the |
| 549 |
|
|
* planes are numbered in descending order starting from the |
| 550 |
|
|
* reference plane (ZINI) |
| 551 |
|
|
* ----------------------------------------------------------- |
| 552 |
|
|
* |
| 553 |
|
|
***************************************************************** |
| 554 |
|
|
|
| 555 |
|
|
SUBROUTINE POSXYZ(AL_P,IFAIL) |
| 556 |
|
|
|
| 557 |
|
|
IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
| 558 |
|
|
|
| 559 |
|
|
include 'commontracker.f' !tracker general common |
| 560 |
|
|
include 'common_mini_2.f' !common for the tracking procedure |
| 561 |
pam-fi |
1.3 |
|
| 562 |
|
|
LOGICAL TRKDEBUG |
| 563 |
|
|
COMMON/TRKD/TRKDEBUG |
| 564 |
mocchiut |
1.1 |
c |
| 565 |
|
|
DIMENSION AL_P(5) |
| 566 |
|
|
* |
| 567 |
|
|
DO I=1,nplanes |
| 568 |
|
|
ZV(I)=ZM(I) ! |
| 569 |
|
|
ENDDO |
| 570 |
|
|
* |
| 571 |
|
|
* set parameters for GRKUTA |
| 572 |
|
|
* |
| 573 |
|
|
IF(AL_P(5).NE.0) CHARGE=AL_P(5)/DABS(AL_P(5)) |
| 574 |
|
|
IF(AL_P(5).EQ.0) CHARGE=1. |
| 575 |
|
|
VOUT(1)=AL_P(1) |
| 576 |
|
|
VOUT(2)=AL_P(2) |
| 577 |
|
|
VOUT(3)=ZINI ! DBLE(Z0)-DBLE(ZSPEC) |
| 578 |
|
|
VOUT(4)=AL_P(3)*DCOS(AL_P(4)) |
| 579 |
|
|
VOUT(5)=AL_P(3)*DSIN(AL_P(4)) |
| 580 |
|
|
VOUT(6)=-1.*DSQRT(1.-AL_P(3)**2) |
| 581 |
|
|
IF(AL_P(5).NE.0.) VOUT(7)=DABS(1./AL_P(5)) |
| 582 |
|
|
IF(AL_P(5).EQ.0.) VOUT(7)=1.E8 |
| 583 |
|
|
DO I=1,nplanes |
| 584 |
|
|
step=vout(3)-zv(i) |
| 585 |
|
|
10 DO J=1,7 |
| 586 |
|
|
VECT(J)=VOUT(J) |
| 587 |
|
|
VECTINI(J)=VOUT(J) |
| 588 |
|
|
ENDDO |
| 589 |
|
|
11 continue |
| 590 |
|
|
CALL GRKUTA(CHARGE,STEP,VECT,VOUT) |
| 591 |
|
|
IF(VOUT(3).GT.VECT(3)) THEN |
| 592 |
|
|
IFAIL=1 |
| 593 |
pam-fi |
1.3 |
if(TRKDEBUG) |
| 594 |
pam-fi |
1.2 |
$ PRINT *,'posxy (grkuta): WARNING ===> backward track!!' |
| 595 |
pam-fi |
1.3 |
if(.TRUE.)print*,'charge',charge |
| 596 |
|
|
if(.TRUE.)print*,'vect',vect |
| 597 |
|
|
if(.TRUE.)print*,'vout',vout |
| 598 |
|
|
if(.TRUE.)print*,'step',step |
| 599 |
mocchiut |
1.1 |
RETURN |
| 600 |
|
|
ENDIF |
| 601 |
|
|
Z=VOUT(3) |
| 602 |
|
|
IF(Z.LE.ZM(I)+TOLL.AND.Z.GE.ZM(I)-TOLL) GOTO 100 |
| 603 |
|
|
IF(Z.GT.ZM(I)+TOLL) GOTO 10 |
| 604 |
|
|
IF(Z.LE.ZM(I)-TOLL) THEN |
| 605 |
|
|
STEP=STEP*(ZM(I)-VECT(3))/(Z-VECT(3)) |
| 606 |
|
|
DO J=1,7 |
| 607 |
|
|
VECT(J)=VECTINI(J) |
| 608 |
|
|
ENDDO |
| 609 |
|
|
GOTO 11 |
| 610 |
|
|
ENDIF |
| 611 |
|
|
|
| 612 |
|
|
* ----------------------------------------------- |
| 613 |
|
|
* evaluate track coordinates |
| 614 |
|
|
100 XV(I)=VOUT(1) |
| 615 |
|
|
YV(I)=VOUT(2) |
| 616 |
|
|
ZV(I)=VOUT(3) |
| 617 |
|
|
AXV(I)=DATAN(VOUT(4)/VOUT(6))*180./ACOS(-1.) |
| 618 |
|
|
AYV(I)=DATAN(VOUT(5)/VOUT(6))*180./ACOS(-1.) |
| 619 |
|
|
* ----------------------------------------------- |
| 620 |
|
|
|
| 621 |
|
|
ENDDO |
| 622 |
|
|
|
| 623 |
|
|
RETURN |
| 624 |
|
|
END |
| 625 |
|
|
|
| 626 |
|
|
|
| 627 |
|
|
|
| 628 |
|
|
|
| 629 |
|
|
|
| 630 |
|
|
* ********************************************************** |
| 631 |
|
|
* Some initialization routines |
| 632 |
|
|
* ********************************************************** |
| 633 |
|
|
|
| 634 |
|
|
* ---------------------------------------------------------- |
| 635 |
|
|
* Routine to initialize COMMON/TRACK/ |
| 636 |
|
|
* |
| 637 |
|
|
subroutine track_init |
| 638 |
|
|
|
| 639 |
|
|
IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
| 640 |
|
|
|
| 641 |
|
|
include 'commontracker.f' !tracker general common |
| 642 |
|
|
include 'common_mini_2.f' !common for the tracking procedure |
| 643 |
|
|
include 'common_mech.f' |
| 644 |
|
|
|
| 645 |
|
|
do i=1,5 |
| 646 |
|
|
AL(i) = 0. |
| 647 |
|
|
enddo |
| 648 |
|
|
|
| 649 |
|
|
do ip=1,NPLANES |
| 650 |
|
|
ZM(IP) = fitz(nplanes-ip+1) !init to mech. position |
| 651 |
|
|
XM(IP) = -100. !0. |
| 652 |
|
|
YM(IP) = -100. !0. |
| 653 |
|
|
XM_A(IP) = -100. !0. |
| 654 |
|
|
YM_A(IP) = -100. !0. |
| 655 |
|
|
c ZM_A(IP) = 0 |
| 656 |
|
|
XM_B(IP) = -100. !0. |
| 657 |
|
|
YM_B(IP) = -100. !0. |
| 658 |
|
|
c ZM_B(IP) = 0 |
| 659 |
|
|
RESX(IP) = 1000. !3.d-4 |
| 660 |
|
|
RESY(IP) = 1000. !12.d-4 |
| 661 |
|
|
XGOOD(IP) = 0 |
| 662 |
|
|
YGOOD(IP) = 0 |
| 663 |
|
|
enddo |
| 664 |
|
|
|
| 665 |
|
|
return |
| 666 |
|
|
end |
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