Power Balance Estimation in Long Duration Discharges on QUEST  

作　　者：K.HANADA H.ZUSHI H.IDEI K.NAKAMURA M.ISHIGURO S.TASHIMA E.I.KALINNIKOVA Y.NAGASHIMA M.HASEGAWA A.FUJISAWA A.HIGASHIJIMA S.KAWASAKI H.NAKASHIMA O.MITARAI A.FUKUYAMA Y.TAKASE X.GAO H.LIU J.QIAN M.ONO R.RAMAN 

机构地区：[1]Research Institute for Applied Mechanics,Kyushu University,Fukuoka 816-8580,Japan [2]Interdisciplinary Graduate School of Engineering Science,Kyushu University,Fukuoka 816-8580,Japan [3]School of Industrial Engineering,Tokai University,Kumamoto 862-8652,Japan [4]Graduate School of Technology,Kyoto University,Kyoto 615-8530,Japan [5]Graduate School of Frontier Science,University of Tokyo,Chiba 277-8561,Japan [6]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China [7]Princeton Plasma Physics Laboratory,Princeton NJ 08540,USA [8]SAeronautics&Astronautics,University of Washington,Seattle WA 98195-2400,USA

出　　处：《Plasma Science and Technology》2016年第11期1069-1075,共7页等离子体科学和技术（英文版）

基　　金：supported by Grant-in-Aid for JSPS Fellows(KAKENHI Grant Number 16H02441,24656559);performed with the support and under the auspices of the NIFS Collaboration Research Program(NIFS05KUTRO14,NIFS11KUTR061,NIFS13KUTR085,NIFS14KUTR103);supported in part by the Collaborative Research Program of the Research Institute for Applied Mechanics,Kyushu University;partly supported by the JSPS-NRF-NSFC A3 Foresight Program in the Field of Plasma Physics(No.11261140328)

摘　　要：Fully non-inductive plasma start-up was successfully achieved by using a well- controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.Fully non-inductive plasma start-up was successfully achieved by using a well- controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.

关 键 词：steady state operation spherical tokamak plasma wall interaction power balance 

分 类 号：O53[理学—等离子体物理] TL631.24[理学—物理]