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|
! Copyright (C) 2007 Barbara Ercolano
!
! Version 3.00
module fluorescence_mod
use common_mod
use constants_mod
use continuum_mod
use grid_mod
use interpolation_mod
use pathIntegration_mod
use vector_mod
type(vector), parameter :: origin=vector(0.,0.,0.) ! origin of the cartesian grid axes
integer , parameter :: safeLim = 10000 ! safety limit for the loops
contains
recursive subroutine fluorescencePacketRun(grid, fType, rvec, xP, yP, zP, gP)
implicit none
real :: number
real, save :: ionPhot = 0.
type(vector), intent(inout) :: rVec !
integer, dimension(2), intent(inout) :: xP, yP, &
& zP ! cartesian axes indeces
! 1= mother; 2=sub
integer, intent(inout) :: gP ! grid index
integer :: igpr ! grid pointer 1= mother 2=sub
integer :: difSourceL(3) ! cell indeces
integer :: err ! allocation error status
integer :: i, j ! counters
integer :: idirP, idirT ! direction cosines
type(grid_type), dimension(:), intent(inout) :: grid ! the grid(s)
type(photon_packet) :: fluoPacket ! the energu packet
character(len=4), intent(inout) :: fType ! what resonance line?
if (fType == 'diffuse') then
! the energy packet has beenid absorbed - reemit a new packet from this position
call energyPacketRun(ftype, rVec, enPacket%xP(1:2), enPacket%yP(1:2), &
& enPacket%zP(1:2), gP)
return
end if
if (gP==1) then
igpr = 1
else if (gP>1) then
igpr = 2
else
print*, "! fluorescencePacketRun: insane grid index"
stop
end if
difSourceL(1) = xP(igpr)
difSourceL(2) = yP(igpr)
difSourceL(3) = zP(igpr)
fluoPacket = newFluorescencePacket(chType=fType, gP=gP, difSource=difSourceL, rvec=rvec)
! compute the next segment of trajectory
call fluoPathSegment(fluoPacket)
return
contains
! this function initializes a photon packet
function initFluorescencePacket(nuP, position, lgLine, lgStellar, xP, yP, zP, gP)
implicit none
real :: random ! random number
type(vector), intent(in) :: position ! the position at which the photon
integer, intent(in) :: nuP ! the frequency of the photon packet
integer, intent(in),dimension(2) :: xP, yP, &
& zP ! indeces of position on the x, y and z axes
integer, intent(in) :: gP ! grid index
integer :: igpi ! grid pointer 1=mother, 2=sub
integer :: i, irepeat ! counter
type(photon_packet) :: initFluorescencePacket ! the photon packet
logical, intent(in) :: lgLine, lgStellar ! line, stellar packet?
initFluorescencePacket%position = position
initFluorescencePacket%iG = gP
if (gP==1) then
igpi=1
else if (gp>1) then
igpi=2
else
print*, "! initFluorescencePacket: insane gridp pointer"
stop
end if
initFluorescencePacket%nuP = nuP
initFluorescencePacket%lgStellar = lgStellar
! check if photon packen is line or continuum photon
if ( lgLine ) then
! line photon
initFluorescencePacket%nu = 0.
initFluorescencePacket%lgLine = .true.
else
! continuum photon
initFluorescencePacket%nu = nuArray(nuP)
initFluorescencePacket%lgLine = .false.
end if
initFluorescencePacket%xP = xP
initFluorescencePacket%yP = yP
initFluorescencePacket%zP = zP
! cater for plane parallel ionization case
if (initFluorescencePacket%lgStellar .and. lgPlaneIonization) then
! get position
! x-direction
call random_number(random)
random = 1. - random
initFluorescencePacket%position%x = &
& -(grid(gP)%xAxis(2)-grid(gP)%xAxis(1))/2. + random*( &
& (grid(gP)%xAxis(2)-grid(gP)%xAxis(1))/2.+&
& (grid(gP)%xAxis(grid(gP)%nx)-grid(gP)%xAxis(grid(gP)%nx-1))/2.+&
& grid(gP)%xAxis(grid(gP)%nx))
if (initFluorescencePacket%position%x<grid(gP)%xAxis(1)) &
& initFluorescencePacket%position%x=grid(gP)%xAxis(1)
if (initFluorescencePacket%position%x>grid(gP)%xAxis(grid(gP)%nx)) &
initFluorescencePacket%position%x=grid(gP)%xAxis(grid(gP)%nx)
call locate(grid(gP)%xAxis, initFluorescencePacket%position%x, initFluorescencePacket%xP(igpi))
if (initFluorescencePacket%xP(igpi) < grid(gP)%nx) then
if (initFluorescencePacket%position%x >= (grid(gP)%xAxis(initFluorescencePacket%xP(igpi))+&
& grid(gP)%xAxis(initFluorescencePacket%xP(igpi)+1))/2.) &
& initFluorescencePacket%xP(igpi) = initFluorescencePacket%xP(igpi)+1
end if
! y-direction
initFluorescencePacket%position%y = 0.
initFluorescencePacket%yP(igpi) = 1
! z-direction
call random_number(random)
random = 1. - random
initFluorescencePacket%position%z = -(grid(gP)%zAxis(2)-grid(gP)%zAxis(1))/2. + random*( &
& (grid(gP)%zAxis(2)-grid(gP)%zAxis(1))/2.+&
& (grid(gP)%zAxis(grid(gP)%nz)-grid(gP)%zAxis(grid(gP)%nz-1))/2.+&
& grid(gP)%zAxis(grid(gP)%nz))
if (initFluorescencePacket%position%z<grid(gP)%zAxis(1)) &
& initFluorescencePacket%position%z=grid(gP)%zAxis(1)
if (initFluorescencePacket%position%z>grid(gP)%zAxis(grid(gP)%nz)) &
& initFluorescencePacket%position%z=grid(gP)%zAxis(grid(gP)%nz)
call locate(grid(gP)%zAxis, initFluorescencePacket%position%z, initFluorescencePacket%zP(igpi))
if (initFluorescencePacket%zP(igpi) < grid(gP)%nz) then
if (initFluorescencePacket%position%z >= (grid(gP)%xAxis(initFluorescencePacket%zP(igpi))+&
& grid(gP)%zAxis(initFluorescencePacket%zP(igpi)+1))/2.) initFluorescencePacket%zP(igpi) =&
& initFluorescencePacket%zP(igpi)+1
end if
if (initFluorescencePacket%xP(igpi)<1) initFluorescencePacket%xP(igpi)=1
if (initFluorescencePacket%zP(igpi)<1) initFluorescencePacket%zP(igpi)=1
! direction is parallel to y-axis direction
initFluorescencePacket%direction%x = 0.
initFluorescencePacket%direction%y = 1.
initFluorescencePacket%direction%z = 0.
if (initFluorescencePacket%xP(igpi) > grid(gP)%xAxis(grid(gP)%nx) .or. &
& initFluorescencePacket%zP(igpi) > grid(gP)%zAxis(grid(gP)%nz)) then
print*, "! initFluorescencePacket: insanity in planeIonisation init"
print*, igpi, initFluorescencePacket%xP(igpi), grid(gP)%xAxis(grid(gP)%nx), &
& initFluorescencePacket%zP(igpi), grid(gP)%zAxis(grid(gP)%nz), &
&random, initFluorescencePacket%position%z
stop
end if
planeIonDistribution(initFluorescencePacket%xP(igpi),initFluorescencePacket%zP(igpi)) = &
& planeIonDistribution(initFluorescencePacket%xP(igpi),initFluorescencePacket%zP(igpi)) + 1
else
do irepeat = 1, 1000000
! get a random direction
initFluorescencePacket%direction = randomUnitVector()
if (initFluorescencePacket%direction%x/=0. .and. &
& initFluorescencePacket%direction%y/=0. .and. &
& initFluorescencePacket%direction%z/=0.) exit
end do
end if
initFluorescencePacket%origin(1) = gP
initFluorescencePacket%origin(2) = grid(gP)%active(initFluorescencePacket%xP(igpi),&
& initFluorescencePacket%yP(igpi), initFluorescencePacket%zP(igpi))
end function initFluorescencePacket
! this function creates a new fluorescence packet
function newFluorescencePacket(chType, gP, difSource, rvec)
type(photon_packet) :: newFluorescencePacket! the photon packet to be created
type(vector), intent(in) :: rVec !
real :: random ! random number
type(vector) :: positionLoc ! the position of the photon
! packet
integer :: nuP ! the frequency index of the photon packet
integer, dimension(2) :: orX,orY,orZ ! dummy
integer, intent(in) :: difSource(3) ! grid and cell indeces
integer, intent(inout) :: gP
integer :: igpn ! grid pointe 1=motehr, 2=sub
character(len=4), intent(in) :: chType ! what line?
if (gP==1) then
igpn = 1
else if (gp>1) then
igpn = 2
else
print*, "! newFluorescencePacket: insane grid pointer"
stop
end if
positionLoc%x = rVec%x
positionLoc%y = rVec%y
positionLoc%z = rVec%z
! initialize the new fluorescence packet
orX(igPn) = difSource(1)
orY(igPn) = difSource(2)
orZ(igPn) = difSource(3)
! initialize the new fluorescence packet
if (grid(gP)%active(orX(igpn), orY(igpn), orZ(igpn)) < 0.) then
print*, "! newFluorescencePacket: new packet cannot be emitted from re-mapped cell -3-"
print*, "chType, nuP, .false., .true., orX,orY,orZ, gp"
print*, chType, nuP, .false., .true., orX,orY,orZ, gp
stop
end if
select case (chType)
! if the photon is stellar
case ("FeKa")
newFluorescencePacket = initFluorescencePacket(FeKaColdP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("FeL1")
newFluorescencePacket = initFluorescencePacket(FeL1P, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("FeL2")
newFluorescencePacket = initFluorescencePacket(FeL2P, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("CKa")
newFluorescencePacket = initFluorescencePacket(CKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("NKa")
newFluorescencePacket = initFluorescencePacket(NKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("OKa")
newFluorescencePacket = initFluorescencePacket(OKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("NeKa")
newFluorescencePacket = initFluorescencePacket(NeKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("MgKa")
newFluorescencePacket = initFluorescencePacket(MgKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("AlKa")
newFluorescencePacket = initFluorescencePacket(AlKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("SiKa")
newFluorescencePacket = initFluorescencePacket(SiKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("SKa")
newFluorescencePacket = initFluorescencePacket(SKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("ArKa")
newFluorescencePacket = initFluorescencePacket(ArKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("CaKa")
newFluorescencePacket = initFluorescencePacket(CaKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
case ("NiKa")
newFluorescencePacket = initFluorescencePacket(NiKaP, positionLoc, .false., .false., orX,&
& orY, orZ, gP)
! if the photon packet type is wrong or missing
case default
print*, "! newFluorescencePacket: unsupported fluorescent transition.", chType
stop
end select
end function newFluorescencePacket
subroutine fluoPathSegment(enPacket)
implicit none
! local variables
type(vector) :: vHat ! direction vector
type(vector) :: rVec ! position vector
real :: absTau ! optical depth
real :: dlLoc ! local displacement
real :: dx, dy, dz
real :: dSx, dSy, dSz
! distances from x,y and z wall
real :: dS ! distance from nearest wall
real :: dV ! lume of this cell
real :: passProb ! prob of passing the next segment
real :: probSca ! prob that the packet scatters
real :: radius ! radius
real :: random ! random number
real :: tauCell ! local tau
integer :: idirT,idirP ! direction cosine counters
integer :: i, j, nS ! counter
integer :: xP,yP,zP ! cartesian axes indeces
integer :: gP ! grid index
integer :: igpp ! grid index 1=mother 2=sub
integer :: safeLimit =1000 ! safe limit for the loop
type(photon_packet), intent(inout) :: enPacket ! the energy packet
character(len=7) :: packetType ! what line?
logical :: lgScattered ! is the packet scattering with dust?
logical :: lgReturn
if (enPacket%iG == 1) then
igpp = 1
else if (enPacket%iG>1) then
igpp = 2
else
print*, "! fluoPathSegment: insane grid index"
stop
end if
! check that the input position is not outside the grid
if ( (enPacket%iG <= 0).or.(enPacket%iG > nGrids) ) then
print*, "! fluoPathSegment: starting position not in any defined gridhses",&
& enPacket
stop
else if ( (enPacket%xP(igpp) <= 0).or.&
&(enPacket%xP(igpp) > grid(enPacket%iG)%nx) ) then
print*, "! fluoPathSegment: starting position in x is outside the grid",&
& enPacket
stop
else if ( (enPacket%yP(igpp) <= 0).or. &
& (enPacket%yP(igpp) > grid(enPacket%iG)%ny) ) then
print*, "! fluoPathSegment: starting position in y is outside the grid",&
& enPacket
stop
else if ( (enPacket%zP(igpp) <= 0).or.&
& (enPacket%zP(igpp) > grid(enPacket%iG)%nz) ) then
print*, "! fluoPathSegment: starting position in z is outside the grid",&
& enPacket
stop
end if
! define vHat and rVec
rVec = enPacket%position
vHat = enPacket%direction
! initialize xP, yP,zP
xP = enPacket%xP(igpp)
yP = enPacket%yP(igpp)
zP = enPacket%zP(igpp)
gP = enPacket%iG
! initialise distance from walls
dSx = 0.
dSy = 0.
dSz = 0.
if (lg1D) then
radius = 1.e10*sqrt((rVec%x/1.e10)*(rVec%x/1.e10) + &
& (rVec%y/1.e10)*(rVec%y/1.e10) + &
& (rVec%z/1.e10)*(rVec%z/1.e10))
call locate(grid(1)%xAxis, radius, xP)
if (nGrids > 1 .or. gP >1) then
print*, " ! fluorescencePacketRun: multiple grids are not allowed in a 1D simulation"
stop
end if
end if
! initialize optical depth
absTau = 0.
! get a random number
call random_number(random)
! calculate the probability
passProb = -log(1.-random)
! speed up photons that my be trapped
if (lgPlaneIonization) then
safeLimit=5000
else
! safeLimit=500000
safeLimit=1000
end if
do i = 1, safeLimit
do j = 1, safeLimit
if (xP > grid(gP)%nx .or. xP < 1 .or. &
& yP > grid(gP)%ny .or. yP < 1 .or. &
& zP > grid(gP)%nz .or. zP < 1 ) then
print*, "! fluoPathSegment: insanity [gp,xp,yp,zp,j,i]", &
& gp, xp, yp, zp, j, i
stop
end if
if (grid(gP)%active(xP,yP,zP)<0) then
! packet is entering a subgrid
enPacket%xP(1) = xP
enPacket%yP(1) = yP
enPacket%zP(1) = zP
gP = abs(grid(gP)%active(xP,yP,zP))
! where is the packet in the sub-grid?
call locate(grid(gP)%xAxis, rVec%x, xP)
if (xP==0) xP = xP+1
if (xP< grid(gP)%nx) then
if (rVec%x > (grid(gP)%xAxis(xP+1)+grid(gP)%xAxis(xP))/2.) &
& xP = xP + 1
end if
call locate(grid(gP)%yAxis, rVec%y, yP)
if (yP==0) yP=yP+1
if (yP< grid(gP)%ny) then
if (rVec%y > (grid(gP)%yAxis(yP+1)+grid(gP)%yAxis(yP))/2.) &
& yP = yP + 1
end if
call locate(grid(gP)%zAxis, rVec%z, zP)
if (zP==0) zP=zP+1
if (zP< grid(gP)%nz) then
if (rVec%z > (grid(gP)%zAxis(zP+1)+grid(gP)%zAxis(zP))/2.) &
& zP = zP + 1
end if
end if
enPacket%iG = gP
igpp = 2
! find distances from all walls
if (lgSymmetricXYZ) then
if ( rVec%x <= grid(1)%xAxis(1) ) then
if (vHat%x<0.) vHat%x = -vHat%x
rVec%x = grid(1)%xAxis(1)
end if
if ( rVec%y <= grid(1)%yAxis(1) ) then
if (vHat%y<0.) vHat%y = -vHat%y
rVec%y = grid(1)%yAxis(1)
end if
if ( rVec%z <= grid(1)%zAxis(1) ) then
if (vHat%z<0.) vHat%z = -vHat%z
rVec%z = grid(1)%zAxis(1)
end if
end if
if (vHat%x>0.) then
if (xP<grid(gP)%nx) then
dSx = ( (grid(gP)%xAxis(xP+1)+grid(gP)%xAxis(xP))/2.-rVec%x)/vHat%x
if (abs(dSx)<1.e-10) then
rVec%x=(grid(gP)%xAxis(xP+1)+grid(gP)%xAxis(xP))/2.
xP = xP+1
end if
else
dSx = ( grid(gP)%xAxis(grid(gP)%nx)-rVec%x)/vHat%x
if (abs(dSx)<1.e-10) then
rVec%x=grid(gP)%xAxis(grid(gP)%nx)
if (.not.lgPlaneIonization .and. gP==1) return
end if
end if
else if (vHat%x<0.) then
if (xP>1) then
dSx = ( (grid(gP)%xAxis(xP)+grid(gP)%xAxis(xP-1))/2.-rVec%x)/vHat%x
if (abs(dSx)<1.e-10) then
rVec%x=(grid(gP)%xAxis(xP)+grid(gP)%xAxis(xP-1))/2.
xP = xP-1
end if
else
dSx = (grid(gP)%xAxis(1)-rVec%x)/vHat%x
if (abs(dSx)<1.e-10) then
rVec%x=grid(gP)%xAxis(1)
end if
end if
else if (vHat%x==0.) then
dSx = grid(gP)%xAxis(grid(gP)%nx)
end if
if (.not.lg1D) then
if (vHat%y>0.) then
if (yP<grid(gP)%ny) then
dSy = ( (grid(gP)%yAxis(yP+1)+grid(gP)%yAxis(yP))/2.-rVec%y)/vHat%y
if (abs(dSy)<1.e-10) then
rVec%y=(grid(gP)%yAxis(yP+1)+grid(gP)%yAxis(yP))/2.
yP = yP+1
end if
else
dSy = ( grid(gP)%yAxis(grid(gP)%ny)-rVec%y)/vHat%y
if (abs(dSy)<1.e-10) then
rVec%y=grid(gP)%yAxis(grid(gP)%ny)
if(gP==1) return
end if
end if
else if (vHat%y<0.) then
if (yP>1) then
dSy = ( (grid(gP)%yAxis(yP)+grid(gP)%yAxis(yP-1))/2.-rVec%y)/vHat%y
if (abs(dSy)<1.e-10) then
rVec%y=(grid(gP)%yAxis(yP)+grid(gP)%yAxis(yP-1))/2.
yP = yP-1
end if
else
dSy = ( grid(gP)%yAxis(1)-rVec%y)/vHat%y
if (abs(dSy)<1.e-10) then
rVec%y=grid(gP)%yAxis(1)
end if
end if
else if (vHat%y==0.) then
dSy = grid(gP)%yAxis(grid(gP)%ny)
end if
if (vHat%z>0.) then
if (zP<grid(gP)%nz) then
dSz = ( (grid(gP)%zAxis(zP+1)+grid(gP)%zAxis(zP))/2.-rVec%z)/vHat%z
if (abs(dSz)<1.e-10) then
rVec%z=(grid(gP)%zAxis(zP+1)+grid(gP)%zAxis(zP))/2.
zP = zP+1
end if
else
dSz = ( grid(gP)%zAxis(grid(gP)%nz)-rVec%z)/vHat%z
if (abs(dSz)<1.e-10) then
rVec%z=grid(gP)%zAxis(grid(gP)%nz)
if (.not.lgPlaneIonization .and. gP==1) return
end if
end if
else if (vHat%z<0.) then
if (zP>1) then
dSz = ( (grid(gP)%zAxis(zP)+grid(gP)%zAxis(zP-1))/2.-rVec%z)/vHat%z
if (abs(dSz)<1.e-10) then
rVec%z=(grid(gP)%zAxis(zP)+grid(gP)%zAxis(zP-1))/2.
zP = zP-1
end if
else
dSz = ( grid(gP)%zAxis(1)-rVec%z)/vHat%z
if (abs(dSz)<1.e-10) then
rVec%z=grid(gP)%zAxis(1)
end if
end if
else if (vHat%z==0.) then
dSz = grid(gP)%zAxis(grid(gP)%nz)
end if
if (xP > grid(gP)%nx .or. xP < 1 .or. &
& yP > grid(gP)%ny .or. yP < 1 .or. &
& zP > grid(gP)%nz .or. zP < 1 ) then
print*, "! fluoPathSegment: insanity -2- [gp,xp,yp,zp]", &
& gp, xp, yp, zp
stop
end if
end if
if (grid(gP)%active(xP,yP,zP)>=0) exit
end do
! cater for cells on cell wall
if ( abs(dSx)<1.e-10 ) dSx = grid(gP)%xAxis(grid(gP)%nx)
if ( abs(dSy)<1.e-10 ) dSy = grid(gP)%yAxis(grid(gP)%ny)
if ( abs(dSz)<1.e-10 ) dSz = grid(gP)%zAxis(grid(gP)%nz)
! find the nearest wall
dSx = abs(dSx)
dSy = abs(dSy)
dSz = abs(dSz)
if (dSx<=0.) then
print*, '! fluoPathSegment: [warning] dSx <= 0.',dSx
print*, 'grid(gP)%xAxis ', grid(gP)%xAxis
print*, 'gP,xP,grid(gP)%xAxis(xP), rVec%x, vHat%x'
print*, gP,xP,grid(gP)%xAxis(xP), rVec%x, vHat%x
dS = min(dSy, dSz)
else if (dSy<=0.) then
print*, '! fluoPathSegment: [warning] dSy <= 0.', dSy
print*, 'grid(gP)%yAxis ', grid(gP)%yAxis
print*, 'gP,yP,grid(gP)%yAxis(yP), rVec%y, vHat%y'
print*, gP,yP,grid(gP)%yAxis(yP), rVec%y, vHat%y
dS = min(dSx, dSz)
else if (dSz<=0.) then
print*, '! fluoPathSegment: [warning] dSz <= 0.', dSz
print*, 'grid(gP)%zAxis ', grid(gP)%zAxis
print*, 'gP,zP,grid(gP)%zAxis(zP), rVec%z, vHat%z'
print*, gP,zP,grid(gP)%zAxis(zP), rVec%z, vHat%z
dS = min(dSx, dSy)
else
dS = min(dSx,dSy)
dS = min(dS, dSz)
end if
! this should now never ever happen
if (dS <= 0.) then
print*, 'fluoPathSegment: dS <= 0', dSx, dSy, dSz
print*, gP, rVec
stop
end if
! calculate the optical depth to the next cell wall
tauCell = dS*grid(gP)%opacity(grid(gP)%active(xP,yP,zP), enPacket%nuP)
if (lg1D) then
if (nGrids>1) then
print*, '! getVolumeLoc: 1D option and multiple grids options are not compatible'
stop
end if
if (xP == 1) then
dV = 4.*Pi* ( (grid(gP)%xAxis(xP+1)/1.e15)**3)/3.
else if ( xP==grid(gP)%nx) then
dV = Pi* ( (3.*(grid(gP)%xAxis(xP)/1.e15)-(grid(gP)%xAxis(xP-1)/1.e15))**3 - &
& ((grid(gP)%xAxis(xP)/1.e15)+(grid(gP)%xAxis(xP-1)/1.e15))**3 ) / 6.
else
dV = Pi* ( ((grid(gP)%xAxis(xP+1)/1.e15)+(grid(gP)%xAxis(xP)/1.e15))**3 - &
& ((grid(gP)%xAxis(xP-1)/1.e15)+(grid(gP)%xAxis(xP)/1.e15))**3 ) / 6.
end if
dV = dV/8.
else
if ( (xP>1) .and. (xP<grid(gP)%nx) ) then
dx = abs(grid(gP)%xAxis(xP+1)-grid(gP)%xAxis(xP-1))/2.
else if ( xP==1 ) then
if (lgSymmetricXYZ) then
dx = abs(grid(gP)%xAxis(xP+1)-grid(gP)%xAxis(xP))/2.
else
dx = abs(grid(gP)%xAxis(xP+1)-grid(gP)%xAxis(xP))
end if
else if ( xP==grid(gP)%nx ) then
dx = abs(grid(gP)%xAxis(xP) -grid(gP)%xAxis(xP-1))
end if
if ( (yP>1) .and. (yP<grid(gP)%ny) ) then
dy = abs(grid(gP)%yAxis(yP+1)-grid(gP)%yAxis(yP-1))/2.
else if ( yP==1 ) then
if (lgSymmetricXYZ) then
dy = abs(grid(gP)%yAxis(yP+1)-grid(gP)%yAxis(yP))/2.
else
dy = abs(grid(gP)%yAxis(yP+1)-grid(gP)%yAxis(yP))
end if
else if ( yP==grid(gP)%ny ) then
dy = abs(grid(gP)%yAxis(yP) -grid(gP)%yAxis(yP-1))
end if
if ( (zP>1) .and. (zP<grid(gP)%nz) ) then
dz = abs(grid(gP)%zAxis(zP+1)-grid(gP)%zAxis(zP-1))/2.
else if ( zP==1 ) then
if (lgSymmetricXYZ) then
dz = abs(grid(gP)%zAxis(zP+1)-grid(gP)%zAxis(zP))/2.
else
dz = abs(grid(gP)%zAxis(zP+1)-grid(gP)%zAxis(zP))
end if
else if ( zP==grid(gP)%nz ) then
dz = abs(grid(gP)%zAxis(zP)-grid(gP)%zAxis(zP-1))
end if
dx = dx/1.e15
dy = dy/1.e15
dz = dz/1.e15
! calculate the volume
dV = dx*dy*dz
end if
! check if the packet interacts within this cell
if ((absTau+tauCell > passProb) .and. (grid(gP)%active(xP,yP,zP)>0)) then
! packet interacts
! calculate where within this cell the packet interacts
dlLoc = (passProb-absTau)/grid(gP)%opacity(grid(gP)%active(xP,yP,zP), enPacket%nuP)
! update packet's position
rVec = rVec + dlLoc*vHat
if (lgSymmetricXYZ .and. gP==1) then
if ( rVec%x <= grid(gP)%xAxis(1) ) then
if (vHat%x<0.) vHat%x = -vHat%x
rVec%x = grid(gP)%xAxis(1)
end if
if ( rVec%y <= grid(gP)%yAxis(1) ) then
if (vHat%y<0.) vHat%y = -vHat%y
rVec%y = grid(gP)%yAxis(1)
end if
if ( rVec%z <= grid(gP)%zAxis(1) ) then
if (vHat%z<0.) vHat%z = -vHat%z
rVec%z = grid(gP)%zAxis(1)
end if
end if
! add contribution of the packet to the radiation field
if (enPacket%lgStellar) then
grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) = &
grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) + dlLoc*deltaEUsed / dV
else ! if the energy packet is diffuse
if (lgDebug) then
grid(gP)%Jdif(grid(gP)%active(xP,yP,zP),enPacket%nuP) = &
& grid(gP)%Jdif(grid(gP)%active(xP,yP,zP),enPacket%nuP) + dlLoc*deltaEUsed / dV
else
grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) = &
& grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) + dlLoc*deltaEUsed / dV
end if
end if
! check if the position within the cell is still within the outer radius
if ( sqrt( (rvec%x/1.e10)**2 + (rvec%y/1.e10)**2 + (rvec%z/1.e10)**2)*1.e10 >= R_out &
& .and. R_out > 0.) then
! the packet escapes without further interaction
idirT = int(acos(enPacket%direction%z)/dTheta)+1
if (idirT>totangleBinsTheta) then
idirT=totangleBinsTheta
end if
if (idirT<1 .or. idirT>totAngleBinsTheta) then
print*, '! fluorescencePacketRun: error in theta direction cosine assignment',&
& idirT, enPacket, dTheta, totAngleBinsTheta
stop
end if
if (enPacket%direction%x<1.e-35) then
idirP = 0
else
idirP = int(atan(enPacket%direction%y/enPacket%direction%x)/dPhi)
end if
if (idirP<0) idirP=totAngleBinsPhi+idirP
idirP=idirP+1
if (idirP>totangleBinsPhi) then
idirP=totangleBinsPhi
end if
if (idirP<1 .or. idirP>totAngleBinsPhi) then
print*, '! fluorescencePacketRun: error in Phi direction cosine assignment',&
& idirP, enPacket, dPhi, totAngleBinsPhi
stop
end if
if (nAngleBins>0) then
if (viewPointPtheta(idirT) == viewPointPphi(idirP).or. &
& (viewPointTheta(viewPointPphi(idirP))==viewPointTheta(viewPointPtheta(idirT))) .or. &
& (viewPointPhi(viewPointPtheta(idirT))==viewPointPhi(viewPointPphi(idirP))) ) then
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), enPacket%nuP,viewPointPtheta(idirT)) = &
&grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,viewPointPtheta(idirT)) + deltaEUsed
if (viewPointPtheta(idirT)/=0) grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
return
end if
! check if the packet is absorbed or scattered
! NOTE : we are ignoring dust
probSca = KNsigmaT(enPacket%nuP)*&
&grid(gP)%Ne(grid(gP)%active(xp,yp,zp))/&
& (grid(gp)%opacity(grid(gp)%active(xp,yp,zp),&
&enPacket%nuP))
call random_number(random)
random = 1.-random
if (random > probSca) then
lgScattered = .false.
else if (random <= probSca) then
lgScattered = .true.
else
print*, '! fluoPathSegment: insanity occurred and scattering/absorption &
& decision stage.'
stop
end if
if (.not. lgScattered) then
absInt = absInt + 1.
exit
else
scaInt = scaInt + 1.
! packet is compton scattered
! calculate new direction
! for now assume scattering is isotropic, when phase
! function is introduced the following must be changed
enPacket%xP(igpp) = xP
enPacket%yP(igpp) = yP
enPacket%zP(igpp) = zP
if (grid(gP)%active(enPacket%xp(igpp), enPacket%yp(igpp), enPacket%zp(igpp)) < 0.) then
print*, "! fluoPathSegment: new packet cannot be emitted from re-mapped cell -1-"
print*, "nuP, .false., .true., xp,yp,zp, gp"
print*, nuP, .false., .true., xp,yp,zp, gp
stop
end if
call comptonScatter(enPacket)
vHat%x = enPacket%direction%x
vHat%y = enPacket%direction%y
vHat%z = enPacket%direction%z
! initialize optical depth
absTau = 0.
! get a random number
call random_number(random)
! calculate the probability
passProb = -log(1.-random)
end if
else
! the packet is not absorbed within this cell
! add contribution of the packet to the radiation field
if (enPacket%lgStellar) then
grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) = &
grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) + dS*deltaEUsed / dV
else ! if the energy packet is diffuse
if (lgDebug) then
grid(gP)%Jdif(grid(gP)%active(xP,yP,zP),enPacket%nuP) = &
& grid(gP)%Jdif(grid(gP)%active(xP,yP,zP),enPacket%nuP) + dS*deltaEUsed / dV
else
grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) = &
& grid(gP)%Jste(grid(gP)%active(xP,yP,zP),enPacket%nuP) + dS*deltaEUsed / dV
end if
end if
! update absTau
absTau = absTau+tauCell
! update packet's position
rVec = rVec+dS*vHat
! keep track of where you are on mother grid
if (gP>1) then
if (enPacket%xP(1) <= 0 .or. &
& enPacket%yP(1) <= 0 .or. &
& enPacket%zP(1) <= 0 ) then
! locate where we are at on the mother grid
call locate(grid(grid(gP)%motherP)%xAxis, rvec%x, enPacket%xP(1))
if ( enPacket%xP(1)< grid(grid(gP)%motherP)%nx) then
if ( rvec%x > ( grid(grid(gP)%motherP)%xAxis(enPacket%xP(1)) + &
& grid(grid(gP)%motherP)%xAxis(enPacket%xP(1)+1)/2.) ) &
& enPacket%xP(1) = enPacket%xP(1)+1
end if
call locate( grid(grid(gP)%motherP)%yAxis, rvec%y, enPacket%yP(1))
if ( enPacket%yP(1)< grid(grid(gP)%motherP)%ny) then
if ( rvec%y > ( grid(grid(gP)%motherP)%yAxis(enPacket%yP(1)) + &
& grid(grid(gP)%motherP)%yAxis(enPacket%yP(1)+1)/2.) ) &
& enPacket%yP(1) = enPacket%yP(1)+1
end if
call locate(grid(grid(gP)%motherP)%zAxis, rvec%z, enPacket%zP(1))
if ( enPacket%zP(1)< grid(grid(gP)%motherP)%nz) then
if ( rvec%z > ( grid(grid(gP)%motherP)%zAxis(enPacket%zP(1)) + &
& grid(grid(gP)%motherP)%zAxis(enPacket%zP(1)+1)/2.) ) &
& enPacket%zP(1) = enPacket%zP(1)+1
end if
else
if (vHat%x>0.) then
if ( enPacket%xP(1) < grid(grid(gP)%motherP)%nx ) then
if ( rVec%x > (grid(grid(gP)%motherP)%xAxis(enPacket%xP(1))+&
& grid(grid(gP)%motherP)%xAxis(enPacket%xP(1)+1))/2. ) then
enPacket%xP(1) = enPacket%xP(1)+1
end if
else
if ( rVec%x > grid(grid(gP)%motherP)%xAxis(enPacket%xP(1))) then
! print*, '! fluoPathSegment: insanity occurred at mother grid transfer (x axis +)', &
! & rVec%x, gP, grid(gP)%motherP
! stop
end if
end if
else
if ( enPacket%xP(1) > 1 ) then
if ( rVec%x <= (grid(grid(gP)%motherP)%xAxis(enPacket%xP(1)-1)+&
& grid(grid(gP)%motherP)%xAxis(enPacket%xP(1)))/2. ) then
enPacket%xP(1) = enPacket%xP(1)-1
end if
else
if (rVec%x < grid(grid(gP)%motherP)%xAxis(1)) then
! print*, '! fluoPathSegment: insanity occurred at mother grid transfer (x axis-)',&
! & rVec%x, gP, grid(gP)%motherP
! stop
end if
end if
end if
if (vHat%y>0.) then
if ( enPacket%yP(1) < grid(grid(gP)%motherP)%ny ) then
if ( rVec%y > (grid(grid(gP)%motherP)%yAxis( enPacket%yP(1))+&
& grid(grid(gP)%motherP)%yAxis(enPacket%yP(1)+1))/2. ) then
enPacket%yP(1) = enPacket%yP(1)+1
end if
else
if ( rVec%y > grid(grid(gP)%motherP)%yAxis( enPacket%yP(1))) then
! print*, '! fluoPathSegment: insanity occurred at mother grid transfer (y axis +)',&
! & rVec%y, gP, grid(gP)%motherP
! stop
end if
end if
else
if ( enPacket%yP(1) > 1 ) then
if ( rVec%y <= (grid(grid(gP)%motherP)%yAxis( enPacket%yP(1)-1)+&
& grid(grid(gP)%motherP)%yAxis(enPacket%yP(1)))/2. ) then
enPacket%yP(1) = enPacket%yP(1)-1
end if
else
if (rVec%y < grid(grid(gP)%motherP)%yAxis(1)) then
! print*, '! fluoPathSegment: insanity occurred at mother grid transfer (y axis -)', &
! & rVec%y, gP, grid(gP)%motherP
! stop
end if
end if
end if
if (vHat%z>0.) then
if ( enPacket%zP(1) < grid(grid(gP)%motherP)%nz ) then
if ( rVec%z > (grid(grid(gP)%motherP)%zAxis( enPacket%zP(1))+&
& grid(grid(gP)%motherP)%zAxis(enPacket%zP(1)+1))/2. ) then
enPacket%zP(1) = enPacket%zP(1)+1
end if
else
if ( rVec%z > grid(grid(gP)%motherP)%zAxis( enPacket%zP(1))) then
! print*, '! fluoPathSegment: insanity occurred at mother grid transfer (z axis +)', &
! & rVec%z, gP, grid(gP)%motherP
! stop
end if
end if
else
if ( enPacket%zP(1) > 1 ) then
if ( rVec%z <= (grid(grid(gP)%motherP)%zAxis( enPacket%zP(1)-1)+&
& grid(grid(gP)%motherP)%zAxis(enPacket%zP(1)))/2. ) then
enPacket%zP(1) = enPacket%zP(1)-1
end if
else
if (rVec%z < grid(grid(gP)%motherP)%zAxis(1)) then
! print*, '! fluoPathSegment: insanity occurred at mother grid transfer (z axis -)', &
! & rVec%z, gP, grid(gP)%motherP
! stop
end if
end if
end if
end if
end if
if (.not.lg1D) then
if ( (dS == dSx) .and. (vHat%x > 0.) ) then
xP = xP+1
else if ( (dS == dSx) .and. (vHat%x < 0.) ) then
xP = xP-1
else if ( (dS == dSy) .and. (vHat%y > 0.) ) then
yP = yP+1
else if ( (dS == dSy) .and. (vHat%y < 0.) ) then
yP = yP-1
else if ( (dS == dSz) .and. (vHat%z > 0.) ) then
zP = zP+1
else if ( (dS == dSz) .and. (vHat%z < 0.) ) then
zP = zP-1
else
print*, '! fluoPathSegment: insanity occurred in dS assignment &
& [dS,dSx,dSy,dSz,vHat]', dS,dSx,dSy,dSz,vHat
end if
else
radius = 1.e10*sqrt((rVec%x/1.e10)*(rVec%x/1.e10) + &
& (rVec%y/1.e10)*(rVec%y/1.e10) + &
& (rVec%z/1.e10)*(rVec%z/1.e10))
call locate(grid(gP)%xAxis, radius , xP)
end if
! be 6/6/06
if(.not.lgPlaneIonization.and..not.lgSymmetricXYZ) then
lgReturn=.false.
if ( rVec%y <= grid(gP)%yAxis(1)-grid(gP)%geoCorrY .or. yP<1) then
! the energy packet escapes this grid
if (gP==1) then
yP=1
lgReturn=.true.
else if (gP>1) then
xP = enPacket%xP(grid(gP)%motherP)
yP = enPacket%yP(grid(gP)%motherP)
zP = enPacket%zP(grid(gP)%motherP)
gP = grid(gP)%motherP
else
print*, '! fluoPathSegment: insanity occurred - invalid gP', gP
stop
end if
end if
if (rVec%y > grid(gP)%yAxis(grid(gP)%ny)+grid(gP)%geoCorrY .or. yP>grid(gP)%ny) then
if (gP==1) then
! the energy packet escapes
yP = grid(gP)%ny
lgReturn=.true.
else if (gP>1) then
xP = enPacket%xP(grid(gP)%motherP)
yP = enPacket%yP(grid(gP)%motherP)
zP = enPacket%zP(grid(gP)%motherP)
gP = grid(gP)%motherP
else
print*, '! fluoPathSegment: insanity occurred - invalid gP', gP
stop
end if
end if
if ( (rVec%x <= grid(gP)%xAxis(1)-grid(gP)%geoCorrX .or. xP<1) .and. gP==1) then
xP=1
lgReturn=.true.
end if
if ( (rVec%x <= grid(gP)%xAxis(1)-grid(gP)%geoCorrX .or. xP<1) &
& .and. gP>1) then
xP = enPacket%xP(grid(gP)%motherP)
yP = enPacket%yP(grid(gP)%motherP)
zP = enPacket%zP(grid(gP)%motherP)
gP = grid(gP)%motherP
end if
if ( (rVec%x >= grid(gP)%xAxis(grid(gP)%nx)+grid(gP)%geoCorrX &
& .or. xP>grid(gP)%nx) .and. gP==1 )then
xP = grid(gP)%nx
lgReturn=.true.
end if
if ( (rVec%x >= grid(gP)%xAxis(grid(gP)%nx)+grid(gP)%geoCorrX&
& .or. xP>grid(gP)%nx) .and. gP>1) then
xP = enPacket%xP(grid(gP)%motherP)
yP = enPacket%yP(grid(gP)%motherP)
zP = enPacket%zP(grid(gP)%motherP)
gP = grid(gP)%motherP
end if
if ( (rVec%z <= grid(gP)%zAxis(1)-grid(gP)%geoCorrZ .or.zP<1) &
& .and. gP==1) then
zP=1
lgReturn=.true.
end if
if ( (rVec%z <= grid(gP)%zAxis(1)-grid(gP)%geoCorrZ &
& .or.zP<1) .and. gP>1) then
xP = enPacket%xP(grid(gP)%motherP)
yP = enPacket%yP(grid(gP)%motherP)
zP = enPacket%zP(grid(gP)%motherP)
gP = grid(gP)%motherP
end if
if ( (rVec%z >= grid(gP)%zAxis(grid(gP)%nz)+grid(gP)%geoCorrZ &
& .or. zP>grid(gP)%nz) &
& .and. gP==1) then
zP = grid(gP)%nz
lgReturn=.true.
end if
if ((rVec%z >= grid(gP)%zAxis(grid(gP)%nz)+grid(gP)%geoCorrZ &
& .or. zP>grid(gP)%nz) .and. gP>1) then
xP = enPacket%xP(grid(gP)%motherP)
yP = enPacket%yP(grid(gP)%motherP)
zP = enPacket%zP(grid(gP)%motherP)
gP = grid(gP)%motherP
end if
if (lgReturn) then
! the packet escapes without further interaction
idirT = int(acos(enPacket%direction%z)/dTheta)+1
if (idirT>totangleBinsTheta) then
idirT=totangleBinsTheta
end if
if (idirT<1 .or. idirT>totAngleBinsTheta) then
print*, '! fluorescencePacketRun: error in theta direction cosine assignment',&
& idirT, enPacket, dTheta, totAngleBinsTheta
stop
end if
if (enPacket%direction%x<1.e-35) then
idirP = 0
else
idirP = int(atan(enPacket%direction%y/enPacket%direction%x)/dPhi)
end if
if (idirP<0) idirP=totAngleBinsPhi+idirP
idirP=idirP+1
if (idirP>totangleBinsPhi) then
idirP=totangleBinsPhi
end if
if (idirP<1 .or. idirP>totAngleBinsPhi) then
print*, '! fluorescencePacketRun: error in phi direction cosine assignment',&
& idirP, enPacket, dPhi, totAngleBinsPhi
stop
end if
if (nAngleBins>0) then
if (viewPointPtheta(idirT) == viewPointPphi(idirP).or. &
& (viewPointTheta(viewPointPphi(idirP))==viewPointTheta(viewPointPtheta(idirT))) .or. &
& (viewPointPhi(viewPointPtheta(idirT))==viewPointPhi(viewPointPphi(idirP))) ) then
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), enPacket%nuP,&
& viewPointPtheta(idirT)) =grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2),&
& enPacket%nuP,viewPointPtheta(idirT)) + deltaEUsed
if (viewPointPtheta(idirT)/=0) grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
&enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
return
end if
end if
! end be 6/6/06
if(lgPlaneIonization) then
lgReturn=.false.
if ( rVec%y <= grid(gP)%yAxis(1)-grid(gP)%geoCorrY .or. yP<1) then
! the energy packet escapes this grid
if (gP==1) then
yP=1
lgReturn=.true.
else if (gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
else
print*, '! fluoPathSegment: insanity occurred - invalid gP', gP
stop
end if
end if
if (rVec%y > grid(gP)%yAxis(grid(gP)%ny)+grid(gP)%geoCorrY .or. yP>grid(gP)%ny) then
if (gP==1) then
! the energy packet escapes
yP = grid(gP)%ny
lgReturn=.true.
else if (gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
else
print*, '! fluoPathSegment: insanity occurred - invalid gP', gP
stop
end if
end if
if ( (rVec%x <= grid(1)%xAxis(1) .or. xP<1) ) then
xP=1
rVec%x = grid(gP)%xAxis(1)
vHat%x = -vHat%x
end if
if ( (rVec%x <= grid(gP)%xAxis(1)-grid(gP)%geoCorrX .or. xP<1) &
& .and. gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
end if
if ( (rVec%x >= grid(1)%xAxis(grid(gP)%nx) &
& .or. xP>grid(gP)%nx) )then
xP = grid(gP)%nx
rVec%x = grid(gP)%xAxis(grid(gP)%nx)
vHat%x = -vHat%x
end if
if ( (rVec%x >= grid(gP)%xAxis(grid(gP)%nx)+grid(gP)%geoCorrX&
& .or. xP>grid(gP)%nx) .and. gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
end if
if ( (rVec%z <= grid(1)%zAxis(1) .or.zP<1) ) then
zP=1
rVec%z = grid(gP)%yAxis(1)
vHat%z = -vHat%z
end if
if ( (rVec%z <= grid(gP)%zAxis(1)-grid(gP)%geoCorrZ &
& .or.zP<1) .and. gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
end if
if ( (rVec%z >= grid(1)%zAxis(grid(gP)%nz) .or. zP>grid(gP)%nz) &
& ) then
zP = grid(gP)%nz
rVec%z = grid(gP)%zAxis(grid(gP)%nz)
vHat%z = -vHat%z
end if
if ((rVec%z >= grid(gP)%zAxis(grid(gP)%nz)+grid(gP)%geoCorrZ &
& .or. zP>grid(gP)%nz) .and. gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
end if
if (lgReturn) then
! the packet escapes without further interaction
idirT = int(acos(enPacket%direction%z)/dTheta)+1
if (idirT>totangleBinsTheta) then
idirT=totangleBinsTheta
end if
if (idirT<1 .or. idirT>totAngleBinsTheta) then
print*, '! energyPacketRun: error in theta direction cosine assignment',&
& idirT, enPacket, dTheta, totAngleBinsTheta
stop
end if
if (enPacket%direction%x<1.e-35) then
idirP = 0
else
idirP = int(atan(enPacket%direction%y/enPacket%direction%x)/dPhi)
end if
if (idirP<0) idirP=totAngleBinsPhi+idirP
idirP=idirP+1
if (idirP>totangleBinsPhi) then
idirP=totangleBinsPhi
end if
if (idirP<1 .or. idirP>totAngleBinsPhi) then
print*, '! energyPacketRun: error in phi direction cosine assignment',&
& idirP, enPacket, dPhi, totAngleBinsPhi
stop
end if
if (nAngleBins>0) then
if (viewPointPtheta(idirT) == viewPointPphi(idirP).or. &
& (viewPointTheta(viewPointPphi(idirP))==viewPointTheta(viewPointPtheta(idirT))) .or. &
& (viewPointPhi(viewPointPtheta(idirT))==viewPointPhi(viewPointPphi(idirP))) ) then
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), enPacket%nuP,viewPointPtheta(idirT)) = &
&grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,viewPointPtheta(idirT)) + deltaEUsed
if (viewPointPtheta(idirT)/=0) grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
return
end if
end if
! check if the path is still within the simulation region
radius = 1.e10*sqrt((rVec%x/1.e10)*(rVec%x/1.e10) + &
& (rVec%y/1.e10)*(rVec%y/1.e10) + &
& (rVec%z/1.e10)*(rVec%z/1.e10))
if (.not.lgPlaneIonization) then
if ( (.not.lgSymmetricXYZ .and. (rVec%x<=grid(1)%xAxis(1)-grid(1)%geoCorrX .or.&
& rVec%y<=grid(1)%yAxis(1)-grid(1)%geoCorrY .or. rVec%z<=grid(1)%zAxis(1)-&
& grid(1)%geoCorrZ)) .or.&
& (rVec%x >= grid(gP)%xAxis(grid(gP)%nx)+grid(gP)%geoCorrX) .or.&
&(rVec%y >= grid(gP)%yAxis(grid(gP)%ny)+grid(gP)%geoCorrY) .or.&
&(rVec%z >= grid(gP)%zAxis(grid(gP)%nz)+grid(gP)%geoCorrZ) .or. &
& xP>grid(gP)%nx .or. yP>grid(gP)%ny .or. zP>grid(gP)%nz ) then
if (gP==1) then
if (enPacket%xP(1) > grid(1)%nx) xP = grid(1)%nx
if (enPacket%yP(1) > grid(1)%ny) yP = grid(1)%ny
if (enPacket%zP(1) > grid(1)%nz) zP = grid(1)%nz
if (enPacket%xP(1) < 1) xP = 1
if (enPacket%yP(1) < 1) yP = 1
if (enPacket%zP(1) < 1) zP = 1
! the energy packet escapes
! the packet escapes without further interaction
idirT = int(acos(enPacket%direction%z)/dTheta)+1
if (idirT>totangleBinsTheta) then
idirT=totangleBinsTheta
end if
if (idirT<1 .or. idirT>totAngleBinsTheta) then
print*, '! energyPacketRun: error in theta direction cosine assignment',&
& idirT, enPacket, dTheta, totAngleBinsTheta
stop
end if
if (enPacket%direction%x<1.e-35) then
idirP = 0
else
idirP = int(atan(enPacket%direction%y/enPacket%direction%x)/dPhi)
end if
if (idirP<0) idirP=totAngleBinsPhi+idirP
idirP=idirP+1
if (idirP>totangleBinsPhi) then
idirP=totangleBinsPhi
end if
if (idirP<1 .or. idirP>totAngleBinsPhi) then
print*, '! energyPacketRun: error in phi direction cosine assignment',&
& idirP, enPacket, dPhi, totAngleBinsPhi
stop
end if
if (nAngleBins>0) then
if (viewPointPtheta(idirT) == viewPointPphi(idirP).or. &
& (viewPointTheta(viewPointPphi(idirP))==viewPointTheta(viewPointPtheta(idirT))) .or. &
& (viewPointPhi(viewPointPtheta(idirT))==viewPointPhi(viewPointPphi(idirP))) ) then
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), enPacket%nuP,&
& viewPointPtheta(idirT)) = &
&grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,viewPointPtheta(idirT)) + deltaEUsed
if (viewPointPtheta(idirT)/=0) grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
!b2.005
return
else if (gP>1) then
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
if (gP/=1) then
print*, '! fluoPathSegment: nested multigrids still not implemented'
stop
end if
if ( (radius >= R_out .and. R_out >= 0.) .or.&
& (rVec%x >= grid(1)%xAxis(grid(1)%nx)+grid(1)%geoCorrX) .or.&
&(rVec%y >= grid(1)%yAxis(grid(1)%ny)+grid(1)%geoCorrY) .or.&
&(rVec%z >= grid(1)%zAxis(grid(1)%nz)+grid(1)%geoCorrZ) .or. &
& (.not.lgSymmetricXYZ .and. (rVec%x<=grid(1)%xAxis(1)-grid(1)%geoCorrX .or.&
& rVec%y<=grid(1)%yAxis(1)-grid(1)%geoCorrY .or. rVec%z<=grid(1)%zAxis(1)-&
& grid(1)%geoCorrZ))) then
if (xP > grid(gP)%nx) xP = grid(gP)%nx
if (yP > grid(gP)%ny) yP = grid(gP)%ny
if (zP > grid(gP)%nz) zP = grid(gP)%nz
if (xP < 1) xP = 1
if (yP < 1) yP = 1
if (zP < 1) zP = 1
! the energy packet escapes
! the packet escapes without further interaction
idirT = int(acos(enPacket%direction%z)/dTheta)+1
if (idirT>totangleBinsTheta) then
idirT=totangleBinsTheta
end if
if (idirT<1 .or. idirT>totAngleBinsTheta) then
print*, '! energyPacketRun: error in theta direction cosine assignment',&
& idirT, enPacket, dTheta, totAngleBinsTheta
stop
end if
if (enPacket%direction%x<1.e-35) then
idirP = 0
else
idirP = int(atan(enPacket%direction%y/enPacket%direction%x)/dPhi)
end if
if (idirP<0) idirP=totAngleBinsPhi+idirP
idirP=idirP+1
if (idirP>totangleBinsPhi) then
idirP=totangleBinsPhi
end if
if (idirP<1 .or. idirP>totAngleBinsPhi) then
print*, '! energyPacketRun: error in phi direction cosine assignment',&
& idirP, enPacket, dPhi, totAngleBinsPhi
stop
end if
if (nAngleBins>0) then
if (viewPointPtheta(idirT) == viewPointPphi(idirP).or. &
&(viewPointTheta(viewPointPphi(idirP))==viewPointTheta(viewPointPtheta(idirT))).or. &
& (viewPointPhi(viewPointPtheta(idirT))==viewPointPhi(viewPointPphi(idirP))) ) then
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), enPacket%nuP,&
& viewPointPtheta(idirT)) = &
&grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,viewPointPtheta(idirT)) + deltaEUsed
if (viewPointPtheta(idirT)/=0) grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
!b2.005
return
end if
else
print*, '! fluoPathSegment: insanity occurred - invalid gP - ', gP
stop
end if
end if
if (lgSymmetricXYZ ) then
if (lgPlaneIonization) then
print*, '! fluoPathSegment: lgSymmetric and lgPlaneionization flags both raised'
stop
end if
if ( rVec%x <= grid(1)%xAxis(1) .or. (gP==1 .and. xP<1)) then
if (vHat%x<0.) vHat%x = -vHat%x
enPacket%xP(1) = 1
xP = 1
rVec%x = grid(gP)%xAxis(1)
end if
if ( rVec%y <= grid(1)%yAxis(1) .or. (gP==1 .and. yP<1)) then
if (vHat%y<0.) vHat%y = -vHat%y
enPacket%yP(1)=1
yP = 1
rVec%y = grid(gP)%yAxis(1)
end if
if ( rVec%z <= grid(1)%zAxis(1) .or. (gP==1 .and. zP<1)) then
if (vHat%z<0.) vHat%z = -vHat%z
enPacket%zP(1) = 1
zP=1
rVec%z = grid(1)%zAxis(1)
end if
end if
end if
if (gP>1) then
if ( ( (rVec%x <= grid(gP)%xAxis(1) &
&.or. xP<1) .and. vHat%x <=0.) .or. &
& ( (rVec%y <= grid(gP)%yAxis(1) &
& .or. yP<1) .and. vHat%y <=0.) .or. &
& ( (rVec%z <= grid(gP)%zAxis(1) &
& .or. zP<1) .and. vHat%z <=0.) .or. &
& ( (rVec%x >= grid(gP)%xAxis(grid(gP)%nx) &
&.or. xP>grid(gP)%nx) .and. vHat%x >=0.) .or. &
& ( (rVec%y >= grid(gP)%yAxis(grid(gP)%ny) &
& .or. yP>grid(gP)%ny) .and. vHat%y >=0.) .or. &
& ( (rVec%z >= grid(gP)%zAxis(grid(gP)%nz) &
& .or. zP>grid(gP)%nz) .and. vHat%z >=0.) ) then
! go back to mother grid
xP = enPacket%xP(1)
yP = enPacket%yP(1)
zP = enPacket%zP(1)
gP = 1
igpp = 1
end if
end if
end if
if (.not. lgPlaneIonization .and. gP==1 .and. (xP > grid(gP)%nx &
& .or. yP > grid(gP)%ny .or. zP > grid(gP)%nz) ) then
! the energy packet escapes
! the packet escapes without further interaction
idirT = int(acos(enPacket%direction%z)/dTheta)+1
if (idirT>totangleBinsTheta) then
idirT=totangleBinsTheta
end if
if (idirT<1 .or. idirT>totAngleBinsTheta) then
print*, '! energyPacketRun: error in theta direction cosine assignment',&
& idirT, enPacket, dTheta, totAngleBinsTheta
stop
end if
if (enPacket%direction%x<1.e-35) then
idirP = 0
else
idirP = int(atan(enPacket%direction%y/enPacket%direction%x)/dPhi)
end if
if (idirP<0) idirP=totAngleBinsPhi+idirP
idirP=idirP+1
if (idirP>totangleBinsPhi) then
idirP=totangleBinsPhi
end if
if (idirP<1 .or. idirP>totAngleBinsPhi) then
print*, '! energyPacketRun: error in phi direction cosine assignment',&
& idirP, enPacket, dPhi, totAngleBinsPhi
stop
end if
if (nAngleBins>0) then
if (viewPointPtheta(idirT) == viewPointPphi(idirP).or. &
& (viewPointTheta(viewPointPphi(idirP))==viewPointTheta(viewPointPtheta(idirT))) .or. &
& (viewPointPhi(viewPointPtheta(idirT))==viewPointPhi(viewPointPphi(idirP))) ) then
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), enPacket%nuP,&
& viewPointPtheta(idirT)) = &
&grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,viewPointPtheta(idirT)) + deltaEUsed
if (viewPointPtheta(idirT)/=0) grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
else
grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
enPacket%nuP,0) = &
& grid(enPacket%origin(1))%escapedPackets(enPacket%origin(2), &
& enPacket%nuP,0) + deltaEUsed
end if
!b2.005
return
end if
end do ! safelimit loop
if (i>= safeLimit) then
if (.not.lgPlaneIonization) then
print*, '! fluoPathSegment: [warning] packet trajectory has exceeded&
& maximum number of events', safeLimit, gP, xP,yP,zP, grid(gP)%active(xP,yP,zP), &
& rvec, vhat, enPacket
end if
return
end if
if (gP==1) then
igpp = 1
else if (gP>1) then
igpp = 2
else
print*, "! fluoPathSegment: insane grid index "
stop
end if
enPacket%xP(igpp) = xP
enPacket%yP(igpp) = yP
enPacket%zP(igpp) = zP
packetType = 'diffuse'
! the energy packet has beenid absorbed - reemit a new packet from this position
call fluorescencePacketRun(grid, packetType, rvec, enPacket%xP(1:2), enPacket%yP(1:2), &
& enPacket%zP(1:2), gP)
return
end subroutine fluoPathSegment
! determine energy and direction for compton redistribution of fluorescent lines
subroutine comptonScatter(fPacket)
implicit none
real :: newNu,newTheta ! new energy and theta
real :: random ! random number
real :: u,v,w,t ! direction units
type(photon_packet),intent(inout) :: fPacket ! the fluorescent packet
integer :: newNuP,newThetaP ! pointer to new energy and theta
! calculate new direction
call getNu2(KNsigmaArray(fPacket%nuP,1:180),newThetaP)
newTheta = real(newThetaP)*Pi/180.
! calculate u,v,w (Harries & Howarth, 1997)
call random_number(random)
w = 2.*random - 1.
t = sqrt(1-w*w)
u = t*cos(newTheta)
v = t*sin(newTheta)
fPacket%direction%x = u
fPacket%direction%y = v
fPacket%direction%z = w
! calculate new energy
newNu = fPacket%nu*PcompArray(fPacket%nuP,newThetaP)
! find this in the nuArray
call locate(nuArray,newNu,newNuP)
fPacket%Nu = newNu
fPacket%NuP = newNuP
end subroutine comptonScatter
! this subroutine determines the index in the PDFs
! same as getNu2
subroutine getNu2(probDen, nuP)
real, dimension(:), intent(in) :: probDen ! probability density function
real :: random ! random number
integer, intent(out) :: nuP ! frequency index of the new
integer :: isearch,i !
! get a random number
call random_number(random)
do i = 1, 10000
if (random==0 .or. random==1.) then
call random_number(random)
else
exit
end if
end do
if (i>=10000) then
print*, '! getNu2: problem with random number generator', random, i
stop
end if
! see what frequency random corresponds to
nuP=1
do isearch = 1, nbins
if (random>=probDen(isearch)) then
nuP=isearch
else
exit
end if
end do
if (nuP>=nbins) then
print*, 'random: ', random
print*, 'probDen: ', probDen
end if
end subroutine getNu2
end subroutine fluorescencePacketRun
end module fluorescence_mod
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