The Hall thruster is a high-efficiency spacecraft propulsion device that utilizes plasma to generate thrust. The most common variant of the Hall thruster is the stationary plasma thruster (SPT). Erosion of the SPT discharge chamber wall by plasma sputtering degrades thruster performance and ultimately ends thruster life. Many efforts over the past few decades have endeavored to understand wall erosion so that novel thrusters can be designed to operate for the thousands of hours required by many missions. However, due to the challenges presented by the plasma and material physics associated with erosion, a complete understanding has thus far eluded researchers. Sputtering rates are not well quantified, erosion features remain unexplained, and computational models are not yet predictive. This article reviews the physics of plasma-induced SPT erosion, highlights important experimental findings, provides an overview of modeling efforts, and discusses erosion mitigation strategies.

中文翻译：

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等离子体诱导霍尔推进器侵蚀的回顾

霍尔推进器是一种利用等离子体产生推力的高效航天器推进装置。霍尔推进器最常见的变体是固定等离子体推进器 (SPT)。等离子体溅射对 SPT 放电室壁的侵蚀会降低推进器的性能并最​​终结束推进器的寿命。过去几十年的许多努力都在努力了解壁面侵蚀，以便可以设计新型推进器来运行许多任务所需的数千小时。然而，由于与侵蚀相关的等离子体和材料物理学带来的挑战，迄今为止研究人员还没有完全理解。溅射率没有很好地量化，侵蚀特征仍然无法解释，计算模型尚未预测。这篇文章回顾了等离子体引起的 SPT 侵蚀的物理学，