Experience with RFX-mod data acquisition system

Abstract Operation of the new RFX machine has started in fall 2004, using a completely renewed version of its MDSplus data acquisition system. The new system runs under Linux and is highly distributed, employing approximately 20 machines which perform local data acquisition and communicate with a central server. The overall experience after several months of operation has been quite successful. In particular, the following aspects represent the major changes, besides the migration from VMS to Linux: - exclusive usage of the MDSplus scripting language TDI to write the device-specific application code; - exclusive usage of Java, and in particular of jScope, for data display in the control room and in the offices; - exclusive usage of Java for the coordination tools.