The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear device used to develop the source and heating concept for MPEX, an experiment to study plasma–material interactions for future fusion reactors. This article will highlight recent analysis and results on Proto-MPEX using an infrared (IR) camera, a key tool for imaging heat fluxes measured at the material target. The target heat fluxes are crucial to understanding the source and heating concepts. The recent analysis includes the application of homography and 3-D finite-element methods to provide between-shot measurements of the 2-D target heat flux profile. The IR camera inferred heat flux is shown to correlate with Langmuir probe inferred heat fluxes for a range of parameters in helicon only and helicon + electron cyclotron heated discharges. Results show both desirable central and undesirable edge heat flux for helicon source and electron heating on the target. These heat flux measurements are shown to be important for better understanding of the source and heating physics.

中文翻译：

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Proto-MPEX 上红外成像的热流分析

原型材料等离子体暴露实验 (Proto-MPEX) 是一种线性设备，用于开发 MPEX 的源和加热概念，MPEX 是一项研究未来聚变反应堆等离子体-材料相互作用的实验。本文将重点介绍使用红外 (IR) 相机对 Proto-MPEX 的最新分析和结果，红外 (IR) 相机是对材料目标处测量的热通量进行成像的关键工具。目标热通量对于理解源和加热概念至关重要。最近的分析包括应用单应性和 3-D 有限元方法来提供 2-D 目标热通量分布的两次射击之间的测量。红外相机推断的热通量显示与朗缪尔探测器推断的热通量相​​关，仅适用于螺旋和螺旋 + 电子回旋加速器加热放电的一系列参数。结果显示了螺旋源和目标上电子加热的理想中心和不理想边缘热通量。这些热通量测量显示对于更好地理解源和加热物理很重要。