1. JPARC Horn 1 Outer Conductor Middle Connection Larry Bartoszek Bartoszek Engineering

2. Horn with insulating gap in the middle Before a connection between the horn and stripline can be worked out, the connection that holds the two halves of the outer conductor must be worked out The outer conductor must be water-tight and hold off the stripline voltage across an insulating gap –I don’t show water seals in the following pictures but they could be like MiniBooNE’s

4. Design Features The design shown has features similar to the Brookhaven horn in that bolts were isolated from the conductors by cup- shaped insulators. –BNL made theirs from G-10 –JPARC probably needs ceramic The ~600V voltage may make the surface path length for hold-off short and easy to satisfy

5. Exploded view of two halves of outer conductor These are threaded rods with nuts welded to the ends because I couldn’t find metric bolts long enough

9. This insulator passes through both halves of the conductor and isolates the threaded rod from the outer conductor

10. This is the downstream insulator that allows the long end of the upstream insulator to nest inside.