Observations Concerning the Injection of a Lithium Aerosol into the Edge of TFTR Discharges
Observations Concerning the Injection of a Lithium Aerosol into the Edge of TFTR Discharges
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DOI：
10.2172/769316
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发表时间：
2000-12
期刊：
影响因子：
--
通讯作者：
D. Mansfield;D. Johnson;B. Grek;H. Kugel;M. Bell
中科院分区：
文献类型：
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作者：
D. Mansfield;D. Johnson;B. Grek;H. Kugel;M. Bell
在托卡马克聚变试验堆上试验了一种主动改变等离子体-壁相互作用的新方法。使用激光将定向锂气溶胶引入放电刮除层中。以这种方式引入的锂烧蚀并优先迁移到限制器接触点。这使得等离子体壁相互作用的影响，在现场和真实的时间由外部手段。在中性束加热等离子体中，能量约束和聚变中子产生率以及等离子体Zeff的减少都有显着的改善。在等离子体边缘引入金属气溶胶增加了等离子体柱的内部电感，也导致了欧姆等离子体中核心电子的迅速加热。初步证据还表明，气溶胶的引入导致边缘极向速度剪切和边缘电场剪切。
A new method of actively modifying the plasma-wall interaction was tested on the Tokamak Fusion Test Reactor. A laser was used to introduce a directed lithium aerosol into the discharge scrape-off layer. The lithium introduced in this fashion ablated and migrated preferentially to the limiter contact points. This allowed the plasma-wall interaction to be influenced in situ and in real time by external means. Significant improvement in energy confinement and fusion neutron production rate as well as a reduction in the plasma Zeff have been documented in a neutral-beam-heated plasma. The introduction of a metallic aerosol into the plasma edge increased the internal inductance of the plasma column and also resulted in prompt heating of core electrons in Ohmic plasmas. Preliminary evidence also suggests that the introduction of an aerosol leads to both edge poloidal velocity shear and edge electric field shear.