کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7967701 1514194 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ion flux dependence of atomic hydrogen loss probabilities on tungsten and carbon surfaces
ترجمه فارسی عنوان
وابستگی شار یون به احتمال هیدروژن اتمی در سطوح تنگستن و کربن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی
Concerns over fuel inventory and consequently radiation safety in a fusion device necessitates a better understanding of complex plasma-material interactions. Pulsed induced fluorescence is employed to determine the loss probability of atomic hydrogen on graphite and tungsten in a low-pressure radio-frequency discharge with an applied magnetic field. The interaction between the plasma and sample material surface leads to a two-stage decay in the atomic hydrogen loss rate in the plasma afterglow, from which the loss probability is determined. The loss rates are found to be dependent on the ion flux. An increase in the ion flux from 1.6 × 1020 m−2 s−1 to 5.5 × 1021 m−2 s−1 leads to an increase in the loss probability by a factor of two for both graphite and tungsten in the near afterglow. The results demonstrate that the plasma operating conditions play an important role in the loss probability of atomic hydrogen at surfaces of fusion-relevant materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 451, Issues 1–3, August 2014, Pages 211-215
نویسندگان
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