DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN Review | Direct submission with log-in | Request submission without log-in
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Title	252: Implement finite-state Off Normal Fault Response system
Name:	Nicholas Eidietis eidietis@fusion.gat.com	Affiliation:	General Atomics
Research Area:	Plasma Control	Presentation time:	Not requested
Co-Author(s):	Humphreys, Walker	ITPA Joint Experiment :	No
Description:	The purpose of this experiment is to test the new Matlab/Stateflow finite state system for off normal fault response (ONFR) on d3d. The goal is to both exercise the basic mechanics of implementation and to demonstrate a comprehensive locked mode response scenario	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	Implement present dud system in new architecture. Implement LM detection/avoidance/mitigation setup/mitigation sequence in new architecture. Piggy-back (no control) to ensure that logic is working correctly. In dedicated session, create locked modes w/ very low density plasmas, and allow logic to try to avoid disruption. If avoidance is too successful, purposely "break" avoidance response so that system has to proceed to mitigation setup and initiation.
Background:	ITER will require an off-normal handling system that can handle ALL off-normal events. At the same time, time is very expensive on ITER, so simply injecting impurities at the first sign of trouble is not an option. The ONFR must be able to decide to recover the shot if possible, avoid disruption without mitigation, or initiate impurity mitigation if necessary. As of now, there is no design for the ITER ONFR system, but its architecture is expected to be finalized late 2013 anyways. D3D is trying to establish some real-world experimental basis for these decisions.
Resource Requirements:	-Programming ONFR system n Stateflow & exporting to PCS -PCS control of mitigation injection systems
Diagnostic Requirements:	locked mode detector
Analysis Requirements:	--
Other Requirements:	--