An Overview of the Hybrid Illinois Device for Research and Applications Material Analysis Test-stand (HIDRA-MAT)
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ORIGINAL RESEARCH
An Overview of the Hybrid Illinois Device for Research and Applications Material Analysis Test-stand (HIDRA-MAT) A. Shone1 • Z. Koyn2 • R. Rizkallah1 • D. O’Dea1 • A. Kapat1 • G. Golba1 • J. Hoffman1 • D. Kurukulasuriya1 Q. Tang1 • A. de Castro1 • J. P. Allain3 • D. Andruczyk1
•
Accepted: 20 September 2020 Ó Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The Hybrid Illinois Device for Research and Applications (HIDRA) at the University of Illinois at Urbana-Champaign is a toroidal plasma device that enables fusion plasma-material interaction testing with both stellarator and tokamak plasmas. HIDRA’s long-pulse steady state stellarator plasmas provide a testbed for plasma facing component (PFC) plasma exposures. The HIDRA Material Analysis Test-stand (HIDRA-MAT) is a material characterization module attached to HIDRA that is being designed and fabricated to include thermal desorption spectroscopy and laser induced breakdown spectroscopy systems for in-vacuo PFC characterization. A specialized rotatable sample holder positions the sample for liquid metal droplet application from a liquid metal droplet injector on HIDRA-MAT. Early experiments look to investigate the effect liquid lithium has on porous tungsten samples’ retention of H, D, and He after plasma exposure. Preliminary results from a dual residual gas analyzer system show the ability to differentiate D2 and He in HIDRA-MAT. This work aims to advance the understanding of liquid metal PFCs and further the design and development of new fusion PFCs and technologies.
Introduction Plasma facing components (PFCs) play a critical role in the development of fusion energy. The numerous underlying mechanisms responsible for plasma-material interactions (PMI) have a substantial effect on plasma performance and device design. Testing PFCs in fusion devices proves to be a considerably difficult and time-consuming task. These challenges arise from larger fusion devices (EAST, JET, etc.) having strict experimental schedules which collate data on several disciplines of fusion energy research, not just PFCs. Additionally, each device’s unique design constraints can impede the feasibility of efficiently testing multiple PFC concepts and restrict experimental campaigns to focus on a single PFC. The development of an experimental device dedicated to testing a diverse set of PFC
& A. Shone [email protected] 1
University of Illinois At Urbana-Champaign, Urbana, IL, USA
2
Energy Driven Technologies LLC, Champaign, IL, USA
3
Pennsylvania State University, State College, PA, USA
materials in a time efficient manner would accelerate the development of fusion PFCs. Fuel and reaction byproduct interactions with the wall have a significant impact on any fusion relevant PFC. Ion implantation leading to fuzz growth [1, 2] and retention of fuel [3] have highlighted some issues with using solid PFCs. The Center for Plasma–Material Interactions (CPMI) at the University of Illinois at Urb
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