In this study, a high specific impulse Hall thruster, HEP-140MF, having a high discharge voltage, was used to accelerate ions. We aimed to obtain a high specific impulse and an acceleration zone moving downstream toward the channel exit to reduce wall sputtering erosion of the walls of the discharge channel, hence ensuring an enhanced lifetime. To study the lifetime characteristics of the high specific impulse Hall thruster, a life test was performed on the HEP-140MF thruster for the first time, and performance parameters, such as thrust, specific impulse, and efficiency, were measured. Changes in the performance parameters and evolutions in the surface profiles of the discharge channel wall were summarized. The reasons contributing to these changes during the life test were analyzed. Moreover, the accelerated life test method was validated on the HEP-140MF.

中文翻译：

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高比冲霍尔推力器HEP-140MF的寿命试验研究

在这项研究中，使用具有高放电电压的高比脉冲霍尔推力器HEP-140MF来加速离子。我们旨在获得高的比冲和加速区，该加速区向下游朝通道出口移动，以减少放电通道壁的壁溅射腐蚀，从而确保延长的使用寿命。为了研究高比冲霍尔推力器的寿命特性，首次在HEP-140MF推力器上进行了寿命测试，并测量了性能参数，例如推力，比冲和效率。总结了性能参数的变化和放电通道壁表面轮廓的演变。分析了在寿命测试中导致这些变化的原因。此外，