Measurement of velocity and diameter of tungsten particles produced by arcing using high-speed video

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Materials and Energy Pub Date : 2024-08-17 DOI:10.1016/j.nme.2024.101725

Alberto Castillo Castillo , Martin Balden , Volker Rohde , Michael Laux , Peter Siemroth , Heinz Pursch , Juergen Sachtleben , Rudolf Neu

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Abstract

Arcing is a mechanism of dust production and erosion in fusion devices. The masses and velocities of tungsten (W) particles produced by arcing is of special interest given that W is used as wall material in current experimental devices and is planned for use in new machines such as ITER. This work presents a new technique for evaluation of the parameters of particles produced by vacuum arcs in laboratory conditions based on direct observation with a high-speed video camera. Tracking of particle trajectory provides a measurement of velocity and angle of emission. Additionally, the emitted thermal radiation of the particles is measured and its evolution over time is compared with a model of its cooling in order to obtain a measurement of size and temperature at the moment of emission for each individual particle. Surprisingly, temperature measurements reveal the production of initially solid particles. The newly established video technique allows automated measurement of a high number of particles in order to obtain distributions of the particle parameters.

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利用高速视频测量电弧产生的钨粒子的速度和直径

电弧是聚变装置中产生粉尘和侵蚀的一种机制。钨（W）粒子在电弧中产生的质量和速度特别引人关注，因为钨在目前的实验装置中被用作壁材料，并计划用于国际热核聚变实验堆（ITER）等新设备中。这项工作提出了一种新技术，用于评估实验室条件下真空电弧产生的粒子参数，该技术基于高速摄像机的直接观察。对粒子轨迹的跟踪可以测量粒子的速度和发射角度。此外，还可以测量粒子的发射热辐射，并将其随时间的变化与冷却模型进行比较，从而获得每个粒子发射时的尺寸和温度测量值。令人惊讶的是，温度测量结果显示最初产生的是固体颗粒。新建立的视频技术可以对大量粒子进行自动测量，从而获得粒子参数的分布情况。

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.