Effects of chemical states of carbon on deuterium retention in carbon-containing materials

Oyaidzu, M.; Kimura, Hiromi; Nakahata, T.; Nishikawa, Yoshinori; Tokitani, M.; Oya, Yasuhisa; Iwakiri, Hirotomo; Yoshida, N.; Okuno, Kenji

doi:10.1016/j.jnucmat.2007.04.015

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…Raman spectroscopy results indicate that hydrogen in the sample mainly exists in the form of compounds formed with C and B. Therefore, the release peaks at around 500 • C and 750 • C could be speculated to correspond to hydrogen isotopes bound to B and C, respectively [28][29][30].…”

Section: Characterization Of In-situ Boronization Filmsmentioning

confidence: 97%

Evolution of hydrogen isotopes retention behavior of in-situ boronization films in EAST

Puyang,

Xu,

Guan

et al. 2024

Nucl. Fusion

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Effective management of hydrogen isotopes retention in plasma-facing materials (PFMs) is crucial, particularly when utilizing tritium (T) as fuel, for the success of burning plasma operations. Boronization, a widely employed technique for controlling fuel recycling and mitigating impurity influx from plasma-surface interactions into the core of burning plasma, significantly influences hydrogen isotopes retention in PFMs. In this study, boronization films were generated on tungsten substrates at EAST, followed by in-situ glow discharge (GD) cleaning and edge-plasma exposure. Employing the MAPES platform, representative samples were analyzed after each process. The resultant carbon-boron films, dense and continuous, exhibited thickness up to 120 nm and were identified as amorphous in structure. It was observed that D2-GD cleaning effectively reduced the H/(H+D) ratio within the carbon-boron films. This hydrogen isotope replacement efficiency was found to be dependent on the thickness of the films. Notably, after boundary plasma exposure, samples with thicker films demonstrated an enhanced capacity to capture D, adsorbing 13.3 times more D than bare tungsten. Our findings offer transformative insights for tritium recycling analysis and the plasma operation of devices like ITER, highlighting the impact of boronization and subsequent treatments on hydrogen isotope retention behavior in PFMs.

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Section: Characterization Of In-situ Boronization Filmsmentioning

confidence: 97%

Evolution of hydrogen isotopes retention behavior of in-situ boronization films in EAST

Puyang,

Xu,

Guan

et al. 2024

Nucl. Fusion

View full text Add to dashboard Cite

show abstract

Deuterium thermal desorption from carbon based materials: A comparison of plasma exposure, ion implantation, gas loading, and C–D codeposition

Писарев

Gasparyan

Rusinov

et al. 2011

Journal of Nuclear Materials

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Thermal desorption spectra from fine grain graphite and carbon fiber composite exposed in different plasma installations have been compared with those obtained after ion implantation, absorption from gas, and those from soft and hard C-D films. Features of the spectra were analysed and led to the conclusion that ion implantation, absorption, and amorphous C:D layer contribute to trapping during plasma irradiation.

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Effects of chemical states of carbon on deuterium retention in carbon-containing materials

Cited by 2 publications

References 16 publications

Evolution of hydrogen isotopes retention behavior of in-situ boronization films in EAST

Evolution of hydrogen isotopes retention behavior of in-situ boronization films in EAST

Deuterium thermal desorption from carbon based materials: A comparison of plasma exposure, ion implantation, gas loading, and C–D codeposition

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