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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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subroutine cncomp(i,j) !(view, VA1) |
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include '../common/commontracker.f' |
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include '../common/common_reduction.f' |
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include '../common/calib.f' |
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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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! excluded from common noise computation |
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c call HBOOK1(20000+100*i+j,' ',30,0.,30.,0.) !??? |
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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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newclstr=1 !flag to warn about new found signal |
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! 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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smean=0. !initialization |
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ssigma=0. |
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nstr=0 |
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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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c call HFILL(10000+100*i+j,signal(k),0.,1.) !??? |
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enddo |
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smean=smean/nstr !strips value distribution mean |
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ssigma=SQRT((ssigma/nstr)-smean**2) !strips value distribution sigma |
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cut=scut*ssigma !exclusion cut |
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do k=1,nstrips_va1 |
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c call HFILL(20000+100*i+j,ABS(signal(k)-smean)/ssigma,0.,1.) !??? |
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if(ABS(signal(k)-smean).gt.cut) then |
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c print*,i,j,k,signal(k),abs(signal(k)),cut,strange(i,j,k) !??? |
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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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countme=countme+1 !??? |
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if (countme.le.3) goto 666 !??? |
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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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do while(newclstr.eq.1) !loops on this VA1 till no new signal |
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! affected strips are found |
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newclstr=0 !to exit from loop if no new cluster is |
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! found |
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errflag=0 |
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call cnoise(i,j,errflag) !(view, VA1, error flag) computes common |
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! noise |
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c print*,cn(i,j) !??? |
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if(errflag.eq.1) goto 10 !goes to next VA1: this one has no signal |
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! free strips... |
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call cutcn(i,j) !(view, VA1) excludes clusters from |
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! common noise calculation |
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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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if(clstr(i,j,k).ne.clstr_old(k)) then !checks if there are |
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! new found clusters, and if so sets |
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newclstr=1 ! newclstr flag = 1 |
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clstr_old(k)=clstr(i,j,k) !stores cluster flags in |
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endif ! clstr_old variable |
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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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enddo !ends do while loop when there are no new |
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! clusters |
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c call HFILL(666,FLOAT(ncs),0.,1.) !??? |
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c$$$ if(ncs.lt.20) then !warns if too many strips have been excluded from CN |
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c$$$ ! computation |
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c$$$ print*,'cncomp: WARNING, LESS THAN 20 STRIPS PASSED CN CUT' |
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c$$$ $ //' ON VA1 ',j,', VIEW ',i !NB questo errore e' "un po'" in conflitto |
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c$$$ ! con quello che setta errflag (vedi cnoise.f)... |
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c$$$ |
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c$$$ endif |
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10 continue |
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return |
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end |
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