(a)

1
(c)
(a)
(b)
2
(a) position
This seems to violate Biot-Savarts
law. Probably, this is due to the finiteness of
the meshes. Lets see just phi dependence.
3
(b) position
4
(c) position
5
Conclusion
There is 0.5 level non-uniformity around
phi-direction at upstream part. This indicates
that the non-uniformity is primary comes from the
difference of path length between top side and
down side rather than the shape of the ear
part. This non-uniformity can be corrected by the
tuning gap of striplines at upsream If this
uniformity significantly affects neutrino
flux. Present (Larrys) shape of the current
feeding part seems to be O.K.