Refueling for Steady-State Plasma by Repetitive Pellet Injection in Large Helical Device  

作　　者：H.Yamada R.Sakamoto I.Viniar M.Goto K.Kikuchi A.Lukin S.Masuzaki J.Miyazawa S.Morita Y.Oda S.Sudo K.Tanaka 

机构地区：[1]National Institute for Fusion Science, Toki, Japan [2]PELIN Laboratory, Ltd., Moscow, Russia [3]Mitsubishi Heavy Industries, Ltd., Kobe, Japan

出　　处：《Plasma Science and Technology》2004年第3期2275-2280,共6页等离子体科学和技术(英文版)

摘　　要：A repetitive pellet injector has been developed for investigation ofrefueling issues towards the steady-state operation in Large Helical Device (LHD). Continuousoperation of more than 10000 pellet launching at 10 Hz has been demonstrated. The maximum repeatingrate is 11 Hz. No technical constraint for longer operation has been found. The reliability ofpellet launch has exceeded 99.9%. The initial application to the NBI-heated plasmas has beensuccessful in the last experimental campaign of LHD. Although the pulse length is limited by theoperational constraint of NBI, the plasma with a density of 8 X 10^(19) m^(-3) has been sustainedfor 2 s by the pellet injection at 10 Hz. A prospect for the future experiment is discussed on thebasis of the initial result.A repetitive pellet injector has been developed for investigation ofrefueling issues towards the steady-state operation in Large Helical Device (LHD). Continuousoperation of more than 10000 pellet launching at 10 Hz has been demonstrated. The maximum repeatingrate is 11 Hz. No technical constraint for longer operation has been found. The reliability ofpellet launch has exceeded 99.9%. The initial application to the NBI-heated plasmas has beensuccessful in the last experimental campaign of LHD. Although the pulse length is limited by theoperational constraint of NBI, the plasma with a density of 8 X 10^(19) m^(-3) has been sustainedfor 2 s by the pellet injection at 10 Hz. A prospect for the future experiment is discussed on thebasis of the initial result.

关 键 词：cryo-cooler screw extruder solid hydrogen 

分 类 号：O531[理学—等离子体物理]