Real-Time data acquisition Prototype proposal of the ITER radial neutron camera and gamma-ray spectrometer

tThe Radial Neutron Camera (RNC) and the Radial Gamma-Ray Spectrometer (RGRS) are two ITER diag-nostics, devoted, respectively, to the Real-Time (RT) measurement of the neutron emissivity profile andto the measurement of the confined alpha profile and runaway electrons. The two systems are closelyrelated as they share the same equatorial port plug and part of the lines-of-sight and both require theacquisition of event-based signals from radiation detectors.The RNC Data Acquisition and Processing (DAQP) system should be capable of handling peak countrates of the order of 106counts per second for a time duration up to 500 s. Moreover, for a continuousdata throughput, the DAQP system of both diagnostics shall provide two separate DMA channels, capableto transfer simultaneously event-based data and RT processed data from the digitizers to the host. ADAQP prototype will be developed to identify and study critical issues.The present paper will: i) present the RNC DAQP prototype showing its compliancy with the RNC plantsystem Fast Controller; ii) show the scalability of the actual RNC DAQP from the prototype concept; iii)identify the differences between the RNC and RGRS DAQP needs; iv) describe the RGRS DAQP system andits interface to the ITER Control Data Access and Communication.© 2017 Elsevier B.V. All rights reserved