Physics of high performance deuterium-tritium plasmas in TFTR
Physics of high performance deuterium-tritium plasmas in TFTR
复制标题
TFTR 中高性能氘氚等离子体物理
DOI：
10.2172/304201
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
S. Batha
中科院分区：
文献类型：
--
作者：
K. McGuire;C. Barnes;S. Batha
在过去的两年中，托卡马克聚变试验堆（TFTR）中的氘-氚（DT）等离子体已被用于研究聚变发电，与氚燃料相关的同位素效应，以及在几个操作制度中的α粒子物理。通过使用增加的等离子体电流和环形磁场以及广泛的锂壁调节，在超级模式下，峰值聚变功率已增加到10.7 MW。在TFTR的高内电感（高锂）制度已扩展到等离子体电流，并已实现8.7兆瓦的聚变功率。氚约束的影响的研究，现在已经进行了欧姆，NBI和ICRF加热的L-模式和反向剪切等离子体。在一般情况下，有一个增强的约束时间在DT等离子体中，这是最明显的supershot和高锂放电，较弱的NBI和ICRF加热的L模式等离子体和欧姆等离子体中仍然较小。在反向剪切放电与足够的氘-NBI加热功率，内部传输势垒已被观察到形成，导致增强的约束。离子热导率和粒子输运的大幅度下降被推断在运输barrier.It似乎需要更高的加热功率来触发与D-T NBI的运输barrier. It的形成和同位素效应的能量约束几乎是不存在的，在这些增强的反向剪切等离子体。许多α粒子的物理问题已经研究了各种操作制度，包括约束的α粒子，它们的重新分布的锯齿，和它们的损失，由于磁流体不稳定性与低环模数。在弱剪切等离子体中，已经观察到环形Alfven本征模的α粒子不稳定。
During the past two years, deuterium-tritium (D-T) plasmas in the Tokamak Fusion Test Reactor (TFTR) have been used to study fusion power production,isotope effects associated with tritium fueling, and alpha-particle physics in several operational regimes. The peak fusion power has been increased to 10.7 MW in the supershot mode through the use of increased plasma current and toroidal magnetic field and extensive lithium wall conditioning. The high-internal-inductance (high -li) regime in TFTR has been extended in plasma current and has achieved 8.7 MW of fusion power. Studies of the effects of tritium on confinement have now been carried out in ohmic, NBI- and ICRF-heated L-mode and reversed-shear plasmas. In general, there is an enhancement in confinement time in D-T plasmas which is most pronounced in supershot and high-li discharges, weaker in L-mode plasmas with NBI and ICRF heating and smaller still in ohmic plasmas. In reversed-shear discharges with sufficient deuterium-NBI heating power, internal transport barriers have been observed to form, leading to enhanced confinement. Large decreases in the ion heat conductivity and particle transport are inferred within the transport barrier.It appears that higher heating power is required to trigger the formation of a transport barrier with D-T NBI and the isotope effect on energy confinement is nearly absent in these enhanced reverse-shear plasmas. Many alpha-particle physics issues have been studied in the various operating regimes including confinement of the alpha particles, their redistribution by sawteeth, and their loss due to MHD instabilities with low toroidal mode numbers. In weak-shear plasmas, alpha-particle destabilization of a toroidal Alfven eigenmode has been observed.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox