| | RF power couplers for the ERL injector, currently
under construction at Cornell University, have been
fabricated. The couplers were assembled in pairs in the
liquid nitrogen cryostat, built for their tests. First two
prototype couplers were tested using an IOT transmitter
and a resonant ring for additional power amplification.
They were tested up to the goal power level of 50 kW CW
and used later for tests of the first injector cavity.
However, the first pair of couplers showed excessive
temperature rise in some points. Therefore, minor
changes in the design have been done to improve cooling.
The couplers of updated design were successfully tested
from a klystron up to the power level of 60 kW CW. In
situ baking was implemented for coupler installed in the
cryostat. | |