Alternate mode for data acquisition and real-time monitoring system based on CAMAC system

Long discharges (about 250 s) have been achieved on HT-7 tokamak experiments in the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP). And in the next generation tokamaks like ITER (I. Yonekawa, Data acquisition and management requirement for ITER, Fusion Eng. Des. 43 (1999) 321 [1]), KSTAR (G.S. Lee, J. Kim, S.M. Hwang, C.S. Chang, M.H. Cho, K. Kim, et al., The design of the KSTAR tokamak, Fusion Eng. Des. 46 (1999) 405 [2]) and EAST (J.R. Luo, L. Zhu, H.Z. Wang, Z.S. Ji, F. Wang, Y. Shu, Towards steady-state operational design for the data and PF control systems of the HT-7U, Nucl. Fusion 43 (9) (2003) 862[3]), the pulses will be about 1000 s. In such steady-state operation, we have to upgrade the CAMAC-based data acquisition system, with higher sampling rates and longer acquisition times. It is necessary to monitor the plasma parameters in real-time so that the operators can change the operational conditions during the discharge to maintain the plasma. A design of the system named alternant data acquisition and real-time monitoring system for steady-state tokamak operation based on CAMAC system has been setup in ASIPP. The application of this system has been demonstrated in the HT-7 and TRIAM-1M tokamaks during their 2004 experiment campaigns.