کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4921296 | 1429342 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of wall conditioning and impurity monitoring systems in Versatile Experiment Spherical Torus (VEST)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
Wall conditioning and impurity monitoring systems are developed in Versatile Experiment Spherical Torus (VEST). As a wall conditioning system, a baking system covering the vacuum vessel wall partially and a glow discharge cleaning (GDC) system using two electrodes with dc and 50Â kHz power supplies are installed. The GDC system operates with hydrogen and helium gases for both chemical and physical desorption. The impurity monitoring system with residual gas analyzer (RGA), operating at <10â5Â Torr with a differential pumping system, is installed along with the optical emission spectroscopy (OES) system to monitor the hydrogen and impurity radiation lines. Effects of these wall conditioning techniques are investigated with the impurity monitoring system for ohmic discharges of VEST. The partial baking and He GDC show limited effects on plasma characteristics but sufficient H2 GDC above 4Â h enables the longer plasma current duration up to â¼15Â ms within 3Â h from the end of treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volumes 109â111, Part B, 1 November 2016, Pages 1082-1086
Journal: Fusion Engineering and Design - Volumes 109â111, Part B, 1 November 2016, Pages 1082-1086
نویسندگان
H.Y. Lee, J. Yang, Y.G. Kim, S.M. Yang, Y.S. Kim, K.H. Lee, Y.H. An, K.J. Chung, Y.S. Na, Y.S. Hwang,