Thermo-oxidation of DIII-D codeposits on open surfaces and in simulated tile gaps

Davis, James W.; Tsui, C.; Chung, Gyo-Bum; Fitzpatrick, B.W.N.; Haasz, A.A.

doi:10.1016/j.jnucmat.2010.11.019

Cited by 9 publications

(10 citation statements)

References 12 publications

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“…It was seen, e.g. in [10,22,11], that the TCR rate shows a non-linear behaviour with time. An intermediate maximum and smaller rates in the beginning and at the end of the removal process, as sketched in Fig.…”

Section: Comparison To Literature Data On Tokamak Deuterated Carbon Cmentioning

confidence: 99%

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Thermally activated reaction–diffusion-controlled chemical bulk reactions of gases and solids

Möller

Kreter

Linsmeier

et al. 2015

Nuclear Materials and Energy

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The chemical kinetics of the reaction of thin films with reactive gases is investigated. The removal of thin films using thermally activated solid-gas to gas reactions is a method to in-situ control deposition inventory in vacuum and plasma vessels. Significant scatter of experimental deposit removal rates at apparently similar conditions was observed in the past, highlighting the need for understanding the underlying processes. A model based on the presence of reactive gas in the films bulk and chemical kinetics is presented. The model describes the diffusion of reactive gas into the film and its chemical interaction with film constituents in the bulk using a stationary reaction-diffusion equation. This yields the reactive gas concentration and reaction rates. Diffusion and reaction rate limitations are depicted in parameter studies. Comparison with literature data on tokamak co-deposit removal results in good agreement of removal rates as a function of pressure, film thickness and temperature.

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Section: Comparison To Literature Data On Tokamak Deuterated Carbon Cmentioning

confidence: 99%

“…Higher gas pressure was seen to increase the removal rate, saturating at pressures above~10 kPa for O 2 as the reactive gas on carbon codeposits [9]. Time-resolved measurements showed a non-linear time evolution of the removal rate during the procedure [10,11]. Several models, e.g.…”

Section: Introductionmentioning

confidence: 99%

Thermally activated reaction–diffusion-controlled chemical bulk reactions of gases and solids

Möller

Kreter

Linsmeier

et al. 2015

Nuclear Materials and Energy

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show abstract

“…Однако они легко мигрируют по трещинам вглубь W-элементов до 100 мкм, где они адсорбируются дефектами, вакансиями и дислокациями на границах и внутри зёрен. При Т < 900 K и флюен-се >10 23 He(Н)/м 2 в W образуются гелиевые и водо-родные блистеры. Водород и гелий собираются на дефектах, деформациях решётки, границах зёрен.…”

Section: день первыйunclassified

“…В этом случае скорость удаления кислорода в 5-7 раз выше, чем в среде Не [10,21]. Вопросы окисления углерода рассматривались также в трёх стендо-вых докладах, представленных на конференции [22][23][24].…”

Section: день третийunclassified

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19th INTERNATIONAL CONFERENCE ON PLASMA SURFACE INTERACTIONS IN CONTROLLED FUSION DEVICES (PSI-19) (SAN DIEGO, USA, 24—28 MAY 2010)

Kolbasov¹

2010

PAST-TF

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Приводится краткий обзор наиболее интересных, по мнению автора, обзорных и приглашённых лекций и устных докладов, прочи-танных на конференции. Они были посвящены в основном нерешённым технологическим проблемам, связанным с сооружением международного термоядерного экспериментального реактора ИТЭР: применению вольфрамовых мишеней в диверторе, локаль-ным и переменным тепловым нагрузкам на первую стенку и дивертор, возможности уменьшить удержание трития в токамаках с углеродными мишенями дивертора, подавлению срывов плазмы и локализованных периферийных мод (ЛПМ).Ключевые слова: ИТЭР, токамак, дивертор, первая стенка, вольфрам. , 24-28 MAY 2010). B.N. KOLBASOV. The author presents a brief overview of the most interesting, in his opinion, review, invited and oral presentations delivered at the conference. They were addressed mainly to unsolved technological problems connected with the construction of International Thermonuclear Experimental Reactor ITER: application of tungsten divertor targets, local and transient heat loads on the first wall and divertor, ability to decrease tritium retention in tokamaks with carbon divertor targets, suppression of plasma disruptions and edge localized modes (ELMs). 19th INTERNATIONAL CONFERENCE ON PLASMA SURFACE INTERACTIONS IN CONTROLLED FUSION DEVICES (PSI-19) (SAN DIEGO, USA

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Post-mortem analyses of gap facing surfaces of tungsten tiles of T-10 ring limiter

Писарев

Arkhipov

Babich

et al. 2021

Fusion Engineering and Design

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Thermo-oxidation of DIII-D codeposits on open surfaces and in simulated tile gaps

Cited by 9 publications

References 12 publications

Thermally activated reaction–diffusion-controlled chemical bulk reactions of gases and solids

Thermally activated reaction–diffusion-controlled chemical bulk reactions of gases and solids

19th INTERNATIONAL CONFERENCE ON PLASMA SURFACE INTERACTIONS IN CONTROLLED FUSION DEVICES (PSI-19) (SAN DIEGO, USA, 24—28 MAY 2010)

Post-mortem analyses of gap facing surfaces of tungsten tiles of T-10 ring limiter

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