Preliminary Design Concepts for the Control and Data Acquisition Systems of the Iter Neutral Beam Injector and Associated Test Facility

ITER is a joint international research and development project aiming to demonstrate the scientific and technical feasibility of fusion power. The ITER Neutral Beam Injector (negative H or D ion source, 1MV acceleration voltage, 40A ion current, 16.5MW beam power, 1 hour continuous operation) is a major and innovative component of ITER and will be supported by a dedicated Test Facility. The neutral beam injector and test facility are being designed with the goal to have one injector fully operational on the ITER device in 2016. The two items need separate, but closely interacting, control and data acquisition systems. The first control and data acquisition system will manage the neutral beam injector and will be installed at the ITER site; the second control and data acquisition system will manage the test facility and in particular will enable extensive scientific exploitation of the injector before its final installation at the ITER site. The paper reports on the design activity for both control systems, including the definition of the system requirements, the functional system structure and the preliminary system architecture.