||A new injector for the cooler
Synchrotron COSY at FZ Juelich has been foreseen based on half-wave
resonators. The first prototype of the inductive RF power coupler has
recently been built and will be used to operate the prototype cavities
in a vertical bathcryostat. The coupling is adjustable to get a loaded
Q of 106 to 109. Concerning the cavity different mechanical tuning
concepts have been analysed. One solution is now under fabrication
including a piezo fine tuner to compensate the Lorentz-Force-Detuning.
The cryomodul design, which houses four cavities, will be finished -
taking into account the restricted place of the whole linac.