LOW LEVEL RF CONTROL SYSTEM MODULES FOR J-PARC RCS

After completing the design phase, the VME modules for the Low Level RF Control (LLRF) of the Rapid Cycling Synchrotron of J-PARC [1] are now in the production and debugging phase. First all modules are tested for basic functionality, for example dual harmonic signal generation. Then sets of modules are connected together to check higher-level functions and feedback. Finally, the LLRF modules are interfaced to high voltage components like amplifier and cavities. We present the results of the tests conducted so far, the test methods and test functions on several levels. This way we simulate beam operation working conditions and gain experience in controlling the parameters.