Reconstructions of the control system for the charge exchange system at the 3 GeV RCS in J-PARC

The charge exchange system at the 3 GeV RCS in J-PARC, which operate to change the foil and drive to injection point in vacuum automatically and remotely. This system composed of the 2 kind system, the drive system and the vacuum system. It is necessary to be control system which required stability and safety, and managed the drive system and the vacuum system. In September 2007, machine trouble that magnetic was caused by the magnetic coupling of the transfer rod decoupling and caught by the gate-valve at operation test before first beam commissioning. This trouble was caused by the magnetic coupling of the transfer rod decoupling and caught by gate-valve. To avoid the machine trouble, we were verified hardware and software to improve this system safety. We will install the new system from beam commissioning in September 2010. This report describes design of the new control system. (author)