Design of Data Acquisition and Control System for Indian Test Facility of Diagnostics Neutral Beam

Abstract

The Indian Test Facility (INTF) – a negative hydrogen ion based 100kV, 60A, 5Hz modulated NBI system having 3s ON/20s OFF duty cycle. Prime objective of the facility is to install a full-scale test bed for the qualification of all Diagnostic Neutral Beam (DNB) parameters, prior to installation in ITER.The automated and safe operation of the INTF will require a reliable and rugged instrumentation and control system which provide control, data acquisition (DAQ), interlock and safety functions, referred as INTF-DACS. The INTF-DACS has been decided to be design based on the ITER CODAC architecture and ITER-PCDH guidelines since the technical understanding of CODAC technology gained from this will later be helpful in development of plant system I&C for DNB.For complete operation of the INTF, approximately 900 numbers of signals are required to be superintending by the DACS. In INTF conventional control loop time required is within the range of 5–100ms and for DAQ except high-end diagnostics, required sampling rates in range of 5 sample per second (Sps) to 10kSps; to fulfill these requirements hardware components have been selected from the ITER slow and fast controller catalogs. For high-end diagnostics required sampling rates up to 100MSps normally in case of certain events, therefore event and burst based DAQ hardware has been finalized. Combined use of CODAC core software (CCS) and NI-LabVIEW has been finalized due to the fact that full required DAQ support is not available in present version of CCS. Interlock system for investment protection of facility and Safety system for occupational safety of the involved personal, are under design as per ITER-PCDH recommendations, which are based on IEC 61508 standard.This paper described the detail design of INTF DACS based on ITER-PCDH guidelines.