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Kernel tilting
Consider a point kernel and a transport direction defined for one of the axes.
In diverging beams, the kernel transport angle
θ
varies with location:
2
r
eA
ra
θ
θ
−
• Kernel
h(r)
=
• Define
δ θ θ
+=′
22
θ
δ
θ
• Parameters
c
i
and
d
i
de-
termined from Monte Carlo
data
2
1
1
δ δ
θ
θ
c c A A
+ + =
′
2
1
1
δ δ
θ
θ
d d a a
+ + =
′
• Approximate