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************************************************************************* |
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* |
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* Subroutine cncomp.f |
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* |
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* iterates common noise computation subroutine (./cnoise.f) and cluster |
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* cutting subroutine (./cutcn.f) till no more clusters are found |
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* |
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************************************************************************* |
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|
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subroutine cncomp(i,j,errflag) !(view, VA1) |
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|
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include 'commontracker.f' |
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include 'common_reduction.f' |
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include 'calib.f' |
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|
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integer errflag !error flag to mark no signal free VA1 |
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integer clstr_old(nstrips_va1) !flag storage vector |
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real signal(nstrips_va1) !"signal" (=adc-ped) value storage vector |
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real smean, ssigma !"signal" mean and sigma |
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real cut !"strange" strip exclusion cut |
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integer newclstr !flag to warn about new found clusters to be |
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c ! excluded from common noise computation |
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|
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c------------------------------------------------------------------------ |
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c |
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c variables initialization |
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c |
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c------------------------------------------------------------------------ |
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do k=1,nstrips_va1 !loops on strips |
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clstr(i,j,k)=1 !initializes signal affected strips flag |
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clstr_old(k)=1 !initializes signal affected strips storage |
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strange(i,j,k)=1 !initializes unusually high or low signal |
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enddo ! affected strips flag |
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|
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newclstr=1 !flag to warn about new found signal |
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c ! affected strips |
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c------------------------------------------------------------------------ |
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c |
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c high or low signal affected strips exclusion: computes "signal" (=adc-ped) |
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c mean value and sigma, and cuts from common noise computation strips |
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c whose ABS(signal) exceeds scut*sigma |
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c |
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c------------------------------------------------------------------------ |
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countme=0 !??? |
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666 continue !??? |
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|
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smean=0. !initialization |
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ssigma=0. |
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nstr=0 |
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|
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do k=1,nstrips_va1 |
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nstr = nstr + strange(i,j,k) !uses only |
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if(mod(i,2).eq.1) then !odd strip ---> Y view |
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signal(k) = - (DBLE(adc(i,j,k)) - pedestal(i,j,k)) !negative signal |
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else !even strip ---> X view |
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signal(k) = DBLE(adc(i,j,k)) - pedestal(i,j,k) !positive signal |
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endif |
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smean = smean + signal(k)*strange(i,j,k) |
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ssigma = ssigma + (signal(k)**2)*strange(i,j,k) |
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enddo |
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|
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smean=smean/nstr !strips value distribution mean |
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|
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ssigma=SQRT((ssigma/nstr)-smean**2) !strips value distribution sigma |
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|
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cut=scut*ssigma !exclusion cut |
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|
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do k=1,nstrips_va1 |
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if(ABS(signal(k)-smean).gt.cut) then |
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strange(i,j,k)=0 !marks strips exceeding cut |
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endif |
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enddo ! in order not to use them in CN computation |
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|
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|
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countme = countme + 1 !??? |
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if (countme.le.3) goto 666 !??? |
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|
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c------------------------------------------------------------------------ |
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c |
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c common noise computation |
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c |
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c----------------------------------------------------------------------- |
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* loops on this VA1 till no new signal affected strips are found |
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do while(newclstr.eq.1) |
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|
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newclstr=0 !to exit from loop if no new cluster is found |
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|
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errflag=0 |
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call cnoise(i,j,errflag) !(view, VA1, error flag) computes cn |
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if(errflag.eq.1) goto 10 !goes to next VA1: this one has no signal-free strips... |
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|
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call cutcn(i,j) !(view, VA1) excludes clusters from cn computation |
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|
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ncs=0 !initializes number of strips not excluded by cncut |
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do k=1,nstrips_va1 !loops on strips |
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* checks if there are new found clusters, and if so sets |
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if(clstr(i,j,k).ne.clstr_old(k)) then |
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newclstr=1 |
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clstr_old(k)=clstr(i,j,k) |
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endif |
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iok=strange(i,j,k)*bad(i,j,k)*clstr(i,j,k) |
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ncs=ncs+iok !counts number of good strips for cn computation |
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enddo |
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|
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enddo !ends do while |
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|
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10 continue |
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|
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return |
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end |
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|
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|
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|
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|
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************************************************************************* |
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* |
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* Subroutine cnoise.f!DA COMMENTARE!??? |
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* |
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* uses adc(nviews,nva1_view,nstrips_va1) and |
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* pedestal(nviews,nva1_view,nstrips_va1) variables to compute common noise, |
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* and fills cn(nviews,nva1_view) variable. in the computation only |
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* not-bad and not-signal-affected strips are used |
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* (bad(nviews,nva1_view,nstrips_va1) and |
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* clstr(nviews,nva1_view,nstrips_va1) flags) |
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* |
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* needs: |
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* - ./common_calib.f |
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* |
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* to be called inside ./cncomp.f |
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* |
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************************************************************************* |
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|
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subroutine cnoise(i,j,gulp) !(view, VA1) |
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|
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include 'commontracker.f' |
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include 'common_reduction.f' |
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include 'calib.f' |
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|
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|
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integer gulp !error flag |
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|
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ncn=0 !number of strips in cn computation |
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cn(i,j)=0 !initializes cn variable |
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|
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do k=1,nstrips_va1 !loops on strips |
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* tags strange, bad or signal-affected strips |
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iok=strange(i,j,k)*bad(i,j,k)*clstr(i,j,k) |
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cn(i,j)=cn(i,j) + (DBLE(adc(i,j,k)) - pedestal(i,j,k))*iok |
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ncn = ncn + iok !counts number of strips in cn computation |
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enddo |
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|
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NSTRIPMAX=10 |
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if(ncn.lt.NSTRIPMAX) then !no signal free strips on this VA1... |
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if(ncn.eq.0)then |
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if(debug)print*,' WARNING - cnoise: ', |
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$ 'no strips for CN computation on VA1 ',j, |
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$ ', VIEW ',i |
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else |
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if(debug)print*,' WARNING - cnoise: ', |
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$ 'less than ',NSTRIPMAX |
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$ ,'strips for CN computation on VA1 ',j, |
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$ ', VIEW ',i |
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endif |
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gulp=1 |
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else |
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cn(i,j)=cn(i,j)/DBLE(ncn) !<<<< computes common noise |
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gulp=0 |
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endif |
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|
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return |
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end |
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|
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|
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************************************************************************* |
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* |
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* Subroutine cutcn.f!DA COMMENTARE!??? |
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* |
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* excludes strips with particle signals and/or noisy strips from common |
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* noise calculation, marking their clstr(nviews,nva1_view,nstrips_va1) |
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* flag: |
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* clstr=0 ---> not to be used in CN computation |
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* clstr=1 ---> to be used in CN computation |
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* |
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* needs: |
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* - ./common_calib.f |
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* |
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* to be called inside ./cncomp.f |
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* |
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************************************************************************* |
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|
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subroutine cutcn(i,j) !(view, VA1) |
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|
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include 'commontracker.f' |
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include 'common_reduction.f' |
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include 'calib.f' |
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|
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|
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integer skip !used to skip strips (see later...) |
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|
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integer kr, kl !position indexes to check signal affected |
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! strips on right and left side of cluster |
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! seed |
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integer ir, il !flags to exit loop on reaching VA1 extremes |
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|
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real valuec !cluster seed signal |
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real cut,stripcut !cluster seed cut |
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|
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real valuel, valuer !left and right strips signal |
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real stripcnincut !strip include cut |
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|
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skip = 0 !initializes skip |
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|
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do k=1,nstrips_va1 !loops on strips searching for cluster seeds |
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|
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if(k.le.skip) goto 20 !continues only if k strip has not been |
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! checked yet |
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|
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clstr(i,j,k)=1 !reinitializes strip to be used in CN!??? |
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! computation, in order to be able to exclude |
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! different strips at every CN computation loop |
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|
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c------------------------------------------------------------------------ |
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c |
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c selects cut according to view |
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c |
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c------------------------------------------------------------------------ |
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if(mod(i,2).eq.1) then !odd strip ---> Y view |
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valuec= - (DBLE(adc(i,j,k))-cn(i,j)-pedestal(i,j,k)) !negative signal |
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cut=clcuty !sets Y cut to find cluster seeds |
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else !even strip ---> X view |
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valuec= DBLE(adc(i,j,k))-cn(i,j)-pedestal(i,j,k) !positive signal |
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cut=clcutx !sets X cut to find cluster seeds |
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endif |
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|
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|
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c------------------------------------------------------------------------ |
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c |
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c seeks clusters |
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c |
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c------------------------------------------------------------------------ |
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stripcut=cut*sigma(i,j,k) !cluster seed cut |
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|
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c if(ABS(valuec).gt.stripcut) then !checks if signal exceeds threshold!??? |
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if(valuec.gt.stripcut) then !checks if signal exceeds threshold |
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|
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c$$$ print*,'cut',i,j,k,valuec,stripcut,adc(i,j,k),cn(i,j) |
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c$$$ $ ,pedestal(i,j,k) !??? |
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|
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clstr(i,j,k)=0 !if so, marks this strip as part of a |
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! cluster |
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|
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c------------------------------------------------------------------------ |
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c after finding a cluster seed, checks also adiacent strips, and marks |
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c the ones exceeding cnincut |
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c------------------------------------------------------------------------ |
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kr=k !initializes position indexes to be equal to |
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kl=k ! cluster seed position |
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|
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ir=0 !initialize flags used to exit from |
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il=0 ! inclusion loop |
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|
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do while (il.eq.0.or.ir.eq.0) !shifts left and right from |
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! cluster seed till it finds a strip below |
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! the threshold, or till it reaches first or |
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! last VA1 strip |
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kr=kr+1 !position index for strips on right side of |
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! cluster seed |
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kl=kl-1 !and for left side |
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|
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c------------------------------------------------------------------------ |
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c checks for last or first strip |
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c------------------------------------------------------------------------ |
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if(kr.gt.nstrips_va1.and.ir.eq.0) then !when index goes |
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ir=1 ! beyond last VA1 strip, change ir flag in |
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! order to "help" exiting from loop |
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skip=nstrips_va1+1 !sets skip beyond last strip: all |
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! strips on the right have been included in |
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! the cluster, so skips all next strips |
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! (goto 20 condition is now always true) |
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endif |
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|
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if(kl.lt.1.and.il.eq.0) then !idem when index goes beyond |
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il=1 ! first strip |
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endif |
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|
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c P.S.: the "....and.i#.eq.0" term in above conditions is needed. In |
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c fact, even if I reach a under-cut strip on the right (so I get ir=1), |
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c the "do while loop" continues till such strip will be found on the |
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c left too. |
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c Thus kl and kr (! too) keep increasing, and it can happen kr gets |
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c greater than nstrips_va1 before kl reaches a under-cut strip. In this |
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c case it would pass this "if condition", so setting skip=nstrips_va1+1 |
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c and skipping right strips never checked, if the "....and.i#.eq.0" term |
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c weren't the: instead, including this part it won't pass it |
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c because when I found reach the last VA1 strip on the right I set ir=1. |
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c (AAAAAAHHHHHHHHH!!!!!!!!!!!) |
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|
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c------------------------------------------------------------------------ |
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c marks strips exceeding inclusion cut |
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c------------------------------------------------------------------------ |
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c for right strips (kr index) |
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if(ir.eq.0) then !if last strip or last over-cut strip has |
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! not been reached |
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|
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if(mod(i,2).eq.1) then !Y view |
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valuer= - (DBLE(adc(i,j,kr))-cn(i,j) !puts in valuer |
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$ -pedestal(i,j,kr)) ! right strip value |
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else !X view |
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valuer=DBLE(adc(i,j,kr))-cn(i,j)-pedestal(i,j,kr) |
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endif |
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|
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stripcnincut=cnincut*sigma(i,j,kr) !defines include cut |
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c if(ABS(valuer).gt.stripcnincut) then !marks right strip if it !??? |
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if(valuer.gt.stripcnincut) then !marks right strip if it |
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clstr(i,j,kr)=0 !exceedes include cut |
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c$$$ print*,'inclcut_r',i,j,kr,valuer,stripcnincut |
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c$$$ $ ,adc(i,j,kr),cn(i,j),pedestal(i,j,kr) !??? |
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else |
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ir=1 !otherwise cluster ends and ir flag =1 |
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! signals it |
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skip=kr !putting skip=kr, next k to be checked is |
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! k=kr |
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endif |
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|
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endif |
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|
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c for left strips (kl index) |
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if(il.eq.0) then !if first strip or last over-cut strip has |
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! not been reached |
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|
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if (mod(i,2).eq.1) then !Y view |
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valuel= - (DBLE(adc(i,j,kl))-cn(i,j) !puts in valuel |
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$ -pedestal(i,j,kl)) ! left strip value |
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else !X view |
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valuel=DBLE(adc(i,j,kl))-cn(i,j)-pedestal(i,j,kl) |
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endif |
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|
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stripcnincut=cnincut*sigma(i,j,kl) !defines include cut |
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c if(ABS(valuel).gt.stripcnincut) then !marks left strip if it!??? |
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if(valuel.gt.stripcnincut) then !marks left strip if it |
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clstr(i,j,kl)=0 !exceedes include cut |
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c$$$ print*,'inclcut_l',i,j,kl,valuel,stripcnincut |
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c$$$ $ ,adc(i,j,kl),cn(i,j),pedestal(i,j,kl) !??? |
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else |
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il=1 !otherwise cluster ends and il flag =1 |
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! signals it |
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endif |
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|
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endif |
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|
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enddo !ends lateral strips loop |
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|
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endif !ends cluster seed condition |
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|
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20 continue !comes here if next strip on the right has |
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! already been included in a cluster |
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|
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enddo !ends principal strip loop |
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|
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return |
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end |
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