کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1567518 | 1514243 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Erosion and deposition behaviour of a-C:H layers in the private flux region of the JET MKII-HD divertor
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Material deposition was measured in the private flux region of JET by means of a quartz microbalance (QMB) for â¼11Â 900Â s of successive plasma discharges with moderate additional heating (2-3Â MW). The QMB was located under the load bearing septum replacement plate with a view towards the inner divertor. In total a â¼270Â nm thick hydrogenated amorphous carbon layer was measured assuming a density of 1Â g/cm3 correlated with a fluence of 2.36Â ÃÂ 1023 D+ ions into a toroidal section of 1Â cm length of the inner divertor. The area of the QMB in the private flux region was deposition dominated when the inner strike point position was on the vertical tiles, line-of-sight with the quartz crystal, and turned into erosion solely by moving the strike point from vertical tile 3 to horizontal tile 4. The most likely reason is a change of the C/D flux ratio of the particles impinging on QMB turning this area from a deposition to an erosion dominated region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volumes 390â391, 15 June 2009, Pages 148-151
Journal: Journal of Nuclear Materials - Volumes 390â391, 15 June 2009, Pages 148-151
نویسندگان
H.G. Esser, A. Kreter, V. Philipps, A.M. Widdowson, J.P. Coad, M. Stamp, JET EFDA Contributors JET EFDA Contributors,