Upgrades toward high-heat flux, liquid lithium plasma-facing components in the NSTX-U
| Autor: | Jonathan Menard, Robert Kaita, M. Ono, P. Rindt, K. Tresemer, N.J. Lopes-Cardozo, Michael Jaworski, A. Brooks |
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| Přispěvatelé: | Science and Technology of Nuclear Fusion, Socio-economic aspects of the deployment of fusion energy, Liquid metal heat shields |
| Jazyk: | angličtina |
| Předmět: |
Liquid metal
Tokamak Divertors Nuclear engineering Flux Nanotechnology Liquid lithium 01 natural sciences 7. Clean energy 010305 fluids & plasmas law.invention law 0103 physical sciences General Materials Science Porous materials 010306 general physics Civil and Structural Engineering Mechanical Engineering Divertor Plasma Upgrade Nuclear Energy and Engineering High heat |
| Zdroj: | Fusion Engineering and Design, 112, 93-101. Elsevier Fusion Engineering and Design |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2016.07.009 |
| Popis: | Liquid metal plasma-facing components (PFCs) provide numerous potential advantages over solid-material components. One critique of the approach is the relatively less developed technologies associated with deploying these components in a fusion plasma-experiment. Exploration of the temperature limits of liquid lithium PFCs in a tokamak divertor and the corresponding consequences on core operation are a high priority informing the possibilities for future liquid lithium PFCs. An all-metal NSTX-U is envisioned to make direct comparison between all high-Z wall operation and liquid lithium PFCs in a single device. By executing the all-metal upgrades incrementally, scientific productivity will be maintained while enabling physics and engineering-science studies to further develop the solid- and liquid-metal components. Six major elements of a flowing liquid-metal divertor system are described and a three-step program for implementing this system is laid out. The upgrade steps involve the first high-Z divertor target upgrade in NSTX-U, pre-filled liquid metal targets and finally, an integrated, flowing liquid metal divertor target. Two example issues are described where the engineering and physics experiments are shown to be closely related in examining the prospects for future liquid metal PFCs. |
| Databáze: | OpenAIRE |
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