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Conceptual engineering method for attenuating He ion interactions on first wall components in the Fusion Test Facility (FTF) employing a low-pressure noble gas

机译:概念工程方法,用于在融合试验设施(FTF)中的第一墙组件上衰减HE离子交互的方法

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摘要

It has been shown that post detonation energetic helium ions can drastically reduce the useful life of the (dry) first wall of an IFE reactor due to the accumulation of implanted helium. For the purpose of attenuating energetic helium ions from interacting with first wall components in the Fusion Test Facility (FTF) target chamber, several concepts have been advanced. These include magnetic intervention (MI), deployment of a dynamically moving first wall, use of a sacrificial shroud, designing the target chamber large enough to mitigate the damage caused by He ions on the target chamber wall, and the use of a low pressure noble gas resident in the target chamber during pulse power operations. It is proposed that employing a low-pressure (~ 1 torr equivalent) noble gas in the target chamber will thermalize energetic helium ions prior to interaction with the wall. The principle benefit of this concept is the simplicity of the design and the utilization of (modified) existing technologies for pumping and processing the noble ambient gas. Although the gas load in the system would be increased over other proposed methods, the use of a ldquogas shieldrdquo may provide a cost effective method of greatly extending the first wall of the target chamber. An engineering study has been initiated to investigate conceptual engineering methods for implementing a viable gas shield strategy in the FTF.
机译:已经表明,由于植入氦的积累,后爆发能量氦离子可以大大降低IFE反应器的(干)第一壁的使用寿命。为了衰减能量氦离子与融合测试设施(FTF)目标室中的第一壁部件相互作用,已经提出了几种概念。这些包括磁性干预(Mi),动态移动的第一壁部署,使用牺牲护罩,设计目标室足够大以减轻目标室壁上的何地造成的损伤,以及使用低压惰性在脉冲功率操作期间驻留在目标室中的气体。提出,在靶室中使用低压(〜1托当量)惰性气体将在与墙壁相互作用之前热化能量氦离子。该概念的原理效益是设计和利用(改进的)现有技术的简单性,用于泵送和加工惰性环境气体。尽管系统中的气体负载将增加其他提出的方法,但是使用Ldquogas Shieldrdquo可以提供具有大大延伸目标室的第一壁的成本有效的方法。已经开始研究工程研究,以调查在FTF中实施可行的气体屏蔽策略的概念工程方法。

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