In-operando Lithium Evaporation Inducing Helium Retention in Long-Pulse HIDRA Helium Plasmas

IF 1.9 4区 工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Andrew Shone, Rabel Rizkallah, Daniel O’Dea, Brandon Kamiyama, Daniel Andruczyk
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Abstract

The Lithium Evaporation EXperiment (LEEX) campaign on the Hybrid Illinois Device for Research and Applications (HIDRA) investigates helium retention effects induced by in-operando lithium evaporations into HIDRA. Lithium droplets were applied to tungsten samples and then exposed to a 600 s helium plasma at different distances, D, from the plasma edge. LEEX data has confirmed previous results at the University of Illinois Urbana-Champaign of in-operando lithium evaporations producing a low recycling regime for HIDRA helium plasmas and additionally proves the retained species is helium. The lithium evaporation from the D = 25 mm case had an 85.3% ± 1% increase in helium retention in the low recycling regime when compared to the steady state plasma of the LEEX control shot. Data presented substantiates previous helium retention claims and advances research surrounding liquid metal PFCs. A retention mechanism has not been identified, but further research utilizing HIDRA aims to investigate this. This study’s outcomes are thoroughly presented and provides additional justification for conducting further research on lithium’s behavior in fusion environments, given its substantial potential impact on the development of PFCs.

Abstract Image

长脉冲HIDRA氦等离子体中锂蒸发诱导氦保留
在混合伊利诺伊研究与应用装置(HIDRA)上进行的锂蒸发实验(LEEX)研究了锂在操作中蒸发到HIDRA中引起的氦保留效应。将锂液滴涂在钨样品上,然后在距离等离子体边缘不同距离处暴露在600 s氦等离子体中。LEEX的数据证实了伊利诺伊大学厄巴纳-香槟分校之前的研究结果,即在操作中锂的蒸发产生了HIDRA氦等离子体的低回收机制,并进一步证明了保留的物质是氦。与LEEX控制弹的稳态等离子体相比,D = 25 mm情况下的锂蒸发在低循环状态下的氦保留率增加了85.3%±1%。提出的数据证实了先前关于液态金属全氟化碳的氦保留主张和研究进展。保留机制尚未确定,但利用HIDRA的进一步研究旨在对此进行调查。这项研究的结果被彻底地提出,并为进一步研究锂在聚变环境中的行为提供了额外的理由,因为它对pfc的发展有巨大的潜在影响。
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来源期刊
Journal of Fusion Energy
Journal of Fusion Energy 工程技术-核科学技术
CiteScore
2.20
自引率
0.00%
发文量
24
审稿时长
2.3 months
期刊介绍: The Journal of Fusion Energy features original research contributions and review papers examining and the development and enhancing the knowledge base of thermonuclear fusion as a potential power source. It is designed to serve as a journal of record for the publication of original research results in fundamental and applied physics, applied science and technological development. The journal publishes qualified papers based on peer reviews. This journal also provides a forum for discussing broader policies and strategies that have played, and will continue to play, a crucial role in fusion programs. In keeping with this theme, readers will find articles covering an array of important matters concerning strategy and program direction.
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