1. Production of Slow Positrons
W. J. Kossler
S. S. Long
JPos09

3. Geant4 generic arrangement. Converter is to left
2.5mm cube
1 x 4 x 1 mm
1cm spacing
Geant4 generic arrangement. Converter is to left
and moderator is to right. Electrons are in cyan,
gammas in violet, and positrons in orange.
The electron beam enters from the left.

9. Angle in the y-z plane

10. Angle in the y-z plane

15. Moderator is target

16. Moderator is target

26. Conclusions Jlab is an ideal test bed for slow e+ production ideas.
At 140 MeV and 1 mA, if the estimate is correct, the yield of 0.9x1011 slow e+/s is higher than anything else in the world.