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cafagna |
3.1 |
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* |
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* Subroutine inter_B.f (from tracker software analysis) |
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* |
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* it computes the magnetic field in a chosen point x,y,z inside or |
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* outside the magnetic cavity, using a trilinear interpolation of |
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* B field measurements (read before by means of ./read_B.f) |
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* if the point falls outside the interpolation volume, set the field to 0 |
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* |
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* needs: |
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* - ../common/common_B_inner.f common file for the inner magnetic field map |
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* - ./inter_B_inner.f common file for the inner magnetic field map |
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* |
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* to be called after ./read_B.f (magnetic field map reading subroutine) |
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* |
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* input: coordinates in m |
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* output: magnetic field in T |
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* |
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************************************************************************* |
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subroutine inter_B(x,y,z,res) !coordinates in m, magnetic field in T |
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IMPLICIT DOUBLE PRECISION (A-H,O-Z) |
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#include "gpfield.inc" |
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c------------------------------------------------------------------------ |
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c |
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c local variables |
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c |
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c------------------------------------------------------------------------ |
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real*8 x,y,z !point of interest |
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real*8 res(3) !interpolated B components: res = (Bx, By, Bz) |
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bottai |
3.2 |
real*8 zl,zu |
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real*8 resu(3),resl(3) |
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cafagna |
3.1 |
c------------------------------------------------------------------------ |
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c |
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c set the field outside the interpolation volume to be 0 |
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c |
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c------------------------------------------------------------------------ |
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do ip=1,3 |
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res(ip)=0. |
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enddo |
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c------------------------------------------------------------------------ |
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c |
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bottai |
3.2 |
c check if the point falls inside the interpolation volumes |
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cafagna |
3.1 |
c |
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c------------------------------------------------------------------------ |
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bottai |
3.2 |
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* ----------------------- |
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* INNER MAP |
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* ----------------------- |
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if( |
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$ (x.ge.edgexmin).and.(x.le.edgexmax) |
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cafagna |
3.1 |
$ .and.(y.ge.edgeymin).and.(y.le.edgeymax) |
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bottai |
3.2 |
$ .and.(z.ge.edgezmin).and.(z.le.edgezmax) |
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$ ) then |
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cafagna |
3.1 |
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call inter_B_inner(x,y,z,res) |
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bottai |
3.2 |
c print*,'INNER - ',z,res |
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endif |
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* ----------------------- |
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* OUTER MAP |
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* ----------------------- |
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if( |
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$ ((x.ge.edgeuxmin).and.(x.le.edgeuxmax) |
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$ .and.(y.ge.edgeuymin).and.(y.le.edgeuymax) |
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$ .and.(z.ge.edgeuzmin).and.(z.le.edgeuzmax)) |
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$ .or. |
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$ ((x.ge.edgelxmin).and.(x.le.edgelxmax) |
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$ .and.(y.ge.edgelymin).and.(y.le.edgelymax) |
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$ .and.(z.ge.edgelzmin).and.(z.le.edgelzmax)) |
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$ ) then |
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call inter_B_outer(x,y,z,res) |
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c res(2)=res(2)*10 |
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c print*,'OUTER - ',z,res |
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endif |
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* -------------------------------- |
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* GAP between INNER and OUTER MAPS |
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* -------------------------------- |
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if( |
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$ (x.gt.edgexmin).and.(x.lt.edgexmax) |
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$ .and.(y.gt.edgeymin).and.(y.lt.edgeymax) |
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$ .and.(z.gt.edgezmax).and.(z.lt.edgeuzmin) |
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$ )then |
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zu = edgeuzmin |
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zl = edgezmax |
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call inter_B_inner(x,y,zl,resu) |
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call inter_B_outer(x,y,zu,resl) |
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do i=1,3 |
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res(i) = z * ((resu(i)-resl(i))/(zu-zl)) |
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$ + resu(i) |
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$ - zu * ((resu(i)-resl(i))/(zu-zl)) |
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enddo |
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c print*,'GAP U - ',z,res |
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elseif( |
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$ (x.gt.edgexmin).and.(x.lt.edgexmax) |
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$ .and.(y.gt.edgeymin).and.(y.lt.edgeymax) |
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$ .and.(z.gt.edgelzmax).and.(z.lt.edgezmin) |
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$ ) then |
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zu = edgezmin |
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zl = edgelzmax |
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call inter_B_inner(x,y,zu,resu) |
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call inter_B_outer(x,y,zl,resl) |
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do i=1,3 |
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res(i) = z * ((resu(i)-resl(i))/(zu-zl)) |
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$ + resu(i) |
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$ - zu * ((resu(i)-resl(i))/(zu-zl)) |
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enddo |
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c print*,'GAP D - ',z,res |
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cafagna |
3.1 |
endif |
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return |
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end |
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