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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Preliminary Test Results of GDC Electrode with Gap Insulation on SWIP Test Bed

Oct 17, 2014, 2:00 PM
4h 45m
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 8


Prof. Hong Bing Xu (Southwest Institute of Physics)


A DC glow discharge system is in preparation for ITER with primary aim to control impurities and particle recycling. On the current design stage, GDC electrode will be integrated into a Diagnostic Port Plug (DPP) as a part of the assembly. A Gap structure is used as electrical insulation among GDC electrode, DFW and DSM. Whiletime, in order to avoid glow discharge generated by the cooling water pipes with high voltage in ITER vacuum vessel and the low pressure gas around, electrical shielding is necessary.Therefore, they need Faraday shielding to restrict the breakdown. From prior test results and experiences, electrode with different gap structures (δ1-δ2-δ3) for electrical insulation is designed. whilemean, in this test, stainless steel net with area 60x100mm2 and a 1x1mm2 mesh size is fixed in surface of stainless case. The electrode is installed on SWIP GDC Test Bed. The test results are given in this paper. The aim is to test on He/H2 breakdown, discharge characteristics and heat load on electrode and to explore the feasibility and reliability of electrical insulation of the gap.The present work provide basis for design of ITER GDC in the future.
Country or International Organisation China
Paper Number FIP/P8-32

Primary author

Prof. Hong Bing Xu (Southwest Institute of Physics)


Dr Li Jun Cai (Southwest Institute of Physics) Mr Long Wan (Southwest Institute of Physics) Prof. Ming Xu Wang (Southwest Institute of Physics) Dr Tao Lin (Southwest Institute of Physics) Dr Yingqiao Wang (Southwestern Insitute of Physics)

Presentation materials