The development of the JT-60 NBI computer system

The neutral beam injection (NBI) is used on the plasma heating system of JT-60, a large scale tokamak equipment built in Japan Atomic Energy Research Institute. The computer system was introduced in order to monitor and operate the NBI system efficiently, and to execute NBI data processing. This computer is effective to reduce the load of the operator. The features of the computer system are as follows; (1) The system uses CAMAC and GP-IB, in order to gather and monitor many NBI data by distribution of system load. (2) The system communicates with a JT-60 central control system (ZENKEI) and sequence controller (SC) etc, and executes the operation sequence. (3) The system has various data processing functions for the saved data of JT-60 NBI. (4) The system takes the icon menu for CRT man-machine communication, and realizes key-board-less man-machine communication, in order to realize easy operation of the NBI system. This report describes the JT-60 NBI computer system. (author)