Jun 9 – 15, 2018
Woodlands Conference Center
America/New_York timezone
**** See you at Real Time 2020 ****

Real-time Data Sharing Comparisons Between NSTX-U, DIII-D, and KSTAR

Jun 14, 2018, 2:35 PM
1h 30m
Woodlands Conference Center

Woodlands Conference Center

159 Visitor Center Dr, Williamsburg, VA 23185
Poster presentation Control, Monitoring,Test and Real Time Diagnostics Systems Poster 2


Keith Erickson (Princeton University)


As Plasma Control Systems (PCS) grow beyond the resource constraints of single, monolithic
computers, the need similarly increases for real-time communication between physical
computers. Three experiments sharing a common baseline framework (the General Atomics
(GA) PCS) approach the situation with similar high level concepts manifested through different
lower level implementations. NSTX-U is building a native PCIe interconnect solution based on
Dolphin products. DIII-D recently upgraded to an Infiniband solution. KSTAR is currently using
a reflective memory infrastructure. These three approaches have differing characteristics and
tradeoffs that affect the real-time system determinism, latency, and overall capability. They
similarly have different implementation requirements and difficulties that affect scalability and
flexibility of the resulting real-time systems. The Princeton University Plasma Physics
Laboratory (PPPL) has gained experience working with these various implementations, and has
developed a detailed analysis of appropriate use cases and considerations that affect real-time
system design decisions. Additionally, the laboratory is supporting efforts to create real-time
safe abstractions on top of the underlying architectures to establish a dynamic set of
communication layer features adaptable to the limitations of the enabling technology.

Minioral Yes
Country USA
Institute Princeton University
Speaker Keith Erickson

Primary authors

Keith Erickson (Princeton University) M.D. Boyer (Princeton University)

Presentation materials