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Showing 1 to 6 of 6 for “"Boronization"”.
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In situ and post mortem surface chemistry measurements of boronization in the national spherical torus experiment upgrade
Plasma facing component (PFC) conditioning has been shown to improve plasma performance in tokamaks by reducing impurities in the core. The method of PFC conditioning used in the National Spherical Torus eXperiment Upgrade (NSTX-U) during the 2015-2016 experimental campaign was boron conditioning. …
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Plasma Facing Components conditioning techniques and their correlation with plasma performance in the National Spherical Torus eXperiment Upgrade (NSTX-U)
… Plasma Facing Components (PFC) conditioning with boronization on plasma performance in the National Spherical Torus eXperiment Up- grade (NSTX-U) has been investigated in this work. A novel PFC diagnostic, the Materials Analysis Particle Probe (MAPP) was commissioned in NSTX-U and was used as the …
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Study of molybdenum sources and screening in the Alcator C-Mod tokamak
… primarily with a high-Z material. The study of boronization as a surface conditioning method which reduces the molybdenum source rates and core concentration has shown a varying effectiveness dependent on first wall surface location. The beneficial effects of boronization disappear rather fast …
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Characterization of thermally diffused bordie layers on AISI 1018 steel : residual stresses (by synchrotron radiation) and microhardness
Boronization is a thermal diffusion process in which needle like boride layers are formed at the surface of the metallic substrate. The boride coatings formed by the diffusion process have high hardness and strong ware and corrosion resistance. In order for coatings of this nature to be …
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Mitigation of RF sheaths through design and implementation of magnetic field-aligned ICRF antenna
… characteristics: low-Z PFC coatings such as boronization [7]; toroidal phasing of antenna straps [3]; and alignment of antenna Faraday screen elements with the total magnetic field [8]. On Alcator C-Mod we have designed a new magnetic field-aligned ICRF antenna to minimize ICRF-specific …
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Methods for the analysis of low-Z plasma facing surfaces in magnetic fusion applications
… recycling when wall tile conditioning via boronization was performed, and high confinement (H-mode) operating conditions were routinely achieved during operation after conditioning. In order to better understand the impact of surface conditioning and subsequent plasma exposure on wall …