Image sensing of MHD-unstable tokamak plasma with microchannel plates
Image sensing of MHD-unstable tokamak plasma with microchannel plates
复制标题
使用微通道板进行 MHD 不稳定托卡马克等离子体的图像传感
DOI：
10.1088/0029-5515/23/11/006
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发表时间：
1983
期刊：
影响因子：
3.3
通讯作者：
S. Takamura
中科院分区：
文献类型：
--
作者：
S. Takamura
利用串联微通道板，在近真空紫外辐射下，利用比MHD活动时间尺度短的曝光时间，成功地在切向端口拍摄了托卡马克等离子体伴随主要破坏的图像。微通道板检测到的等离子体柱在托卡马克放电过程中的水平运动与一对磁探头测得的位置信号一致。在主要破坏后不久，观察到等离子体柱的破坏。在大断裂之前拍摄的图像似乎显示了磁岛的形成是由于MHD活动的发展，其主要极向和环向模态分别为m = 2和n = 1。
Images of tokamak plasma accompanying a major disruption are taken successfully at a tangential port by using a tandem microchannel plate through near-vacuum ultra-violet emission with an exposure time shorter than the time-scale of MHD activities. The horizontal movement of the plasma column as detected by the microchannel plate during the tokamak discharge is found to be consistent with the position signal obtained from a pair of magnetic probes. Shortly after the major disruption, a destruction of the plasma column is observed. The images taken just before the major disruption seem to show the formation of magnetic islands due to the development of MHD activities with main poloidal and toroidal mode numbers of m = 2 and n = 1, respectively.