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This paper explores the effect of a liquid lithium curtain on fusion reactor plasma, such curtain is utilized as the first wall for the engineering outline design of the Fusion Experimental Breeder (FEB-E). The relationships between the surface temperature of a liquid lithium curtain and the effective plasma charge, fuel dilution and fusion power production have been derived. Results indicate that under normal operation, the evaporation of liquid lithium does not seriously affect the effective plasma charge, but effects on fuel dilution and fusion power are more sensitive. As an example, it has investigated the relationships between the liquid lithium curtain flow velocity and the rise of surface temperature based on operation scenario II of the FEB-E design with reversed shear configuration and high power density. Results show that even if the liquid lithium curtain flow velocity is as low as 0.5 m/s, the effects of evaporation from the liquid lithium curtain on plasma are negligible. In the present design, the sputtering of liquid lithium curtain and the particle removal effects of the divertor are not yet considered in detail. Further studies are in progress, and in this work implication of lithium erosion and divertor physics on fusion reactor operation are discussed.[第一段] 相似文献
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Similarly to but quite different from the xenon poisoning effects resulting from fission-produced iodine during the restart-up process of a fission reactor, we introduce a completely new concept of the tritium burn-up depth and tritium break-even time in the fusion energy research area. To show what the least required amount of tritium storage is used to start up a fusion reactor and how long a time the fusion reactor needs to be operated for achieving the tritium break-even during the initial start-up phase due to the finite tritium breeding time that is dependent on the tritium breeder, specific structure of breeding zone, layout of coolant flow pipe, tritium recovery scheme, extraction process, the tritium retention of reactor components, unrecoverable tritium fraction in breeder, leakage to the inertial gas container, and the natural decay etc., we describe this new phenomenon and answer this problem by setting up and by solving a set of equations, which express a dynamic subsystem model of the tritium inventory evolution in a fusion experimental breeder (FEB). It is found that the tritium burn-up depth is 317g and the tritium break-even time is approximately 240 full power days for FEB designed detail configuration and it is also found that after one-year operation, the tritium storage reaches 1.18kg that is more than the least required amount of tritium storage to start up three of FEB-like fusion reactors. 相似文献
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HL-1M装置实现了一种新的气体加料改善约束的方法-分子束注入(用多脉冲高速分子束注入加料)。多脉冲分子束注入加料可以控制等离子体密度分布、改善约束性能和提高密度极限。HL-1M托卡马克的多脉冲分子束注入得到了高的加料效率、改进了能量约束并维持了较高的密度峰化截面。分子束加料τE的改善和Qn 值的增加可与HL-1M装置的小弹丸注入和ASDEX的小弹丸注入结果相比拟。脉冲高速分子束是由高压氢分子气体通过拉瓦尔(Laval)喷口形成的。在实验中CCD相机可以用于研究分子束与离子体相互作用的许多复杂物理现象,用它拍摄分子束在等离子体中的辐射云照片是研究分子束辐射过程极其有效的手段。 相似文献
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New Mechanism for Enhancing Ash Removal Efficiency and Reducing Tritium Inventory 总被引:2,自引:0,他引:2 下载免费PDF全文
A new mechanism is suggested to suppress ash particle back streams in the divertor region of our fusion experimental breeder (FEB) reactor for enhancing the ash removal efficiency and reducing the tritium inventory by applications of the nonlinear effect of high power rf ponderomotive force potential which reflects the platereleased and re-ionized He^+ back to the plate. Meanwhile, the potential does not hinder α particles, which are coming from scraping of the layer, flowing to the target plate. However, it does stop tritium ions flowing to the target. Based on the FEB design parameters, our calculations have shown that the ash removal efficiency can be improved by as much as 40% if the parallel component of rf field 150-200 V/cm is applied to the location at a perpendicular distance L = 20 cm apart from the plate and the plate-recycling neutral helium atom energy is' about 0.75eV, at the same time, the tritium inventory can be reduced to some extent. 相似文献
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多发弹丸加料是为稳态聚变堆提出的,它可以控制放电等离子体密度分布,改善约束性能和提高密度极限,是国际受控核聚变研究的重要内容之一。在实验中CCD相机可以用于研究弹丸与等离子体相互作用的许多复杂物理现象,用它拍摄弹丸在等离子体中消融云的照片是研究弹丸消融过程极其有效的手段。1999年用改进后的8发氢弹丸加料系统在水平方向上注入HL-1M等离子体,用SensiCam360LF型CCD相机在弹丸发射线连接法兰轴线上端,进行弹丸消融云的拍摄,观察弹丸的消融过程。 相似文献
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采用等离子体流体模型和线性场理论,导出了在强引导磁场下,一无限薄环形等离子体加载 波纹波导中电磁波传播的色散关系.数值计算并分析了在不同的等离子体填充密度下,低频 等离子体模式的色散特性和行波管的小信号增益.研究发现,低频等离子体模式可与相对论 电子束发生同步互作用使高频信号放大.同时,在无限薄环形等离子体填充条件下,波纹波 导中的低频等离子体模式严格满足Floquet定理所要求的周期性,其上截止频率不再受到等 离子体频率的限制,当密度较大时,等离子体模式还可与TM模式发生耦合.
关键词:
等离子体
波纹波导
色散关系
增益 相似文献