The critical breakdown path (CBP) has a significant impact on the breakdown voltage curve and the ignition time of heaterless hollow cathodes (HHCs). To determine the pattern of the variation in the CBP position and its impact on ignition performance, a numerical model named the CBP evaluation (CBPE) was established in this paper to calculate the CBP of a HHC. The CBPE model can be used to screen various potential breakdown paths to identify those that are most likely to satisfy the Townsend breakdown conditions, which are denoted as CBPs. To verify the calculation accuracy of the CBPE model, 4.5 A-level HHC ignition tests were conducted on HHCs with three different structures. By comparing the test results and the calculated results of the breakdown voltage, the calculation errors of the CBPE under three HHC conditions ranged from 1.6% to 5.8%, and the trends of the calculated results were consistent with those of the test results. The ignition test also showed the characterist...

中文翻译：

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临界击穿路径对无加热器空心阴极点火性能的影响

临界击穿路径（CBP）对击穿电压曲线和无加热器空心阴极（HHCs）的着火时间有重大影响。为了确定CBP位置变化的形式及其对点火性能的影响，本文建立了一个名为CBP评估（CBPE）的数值模型来计算HHC的CBP。CBPE模型可用于筛选各种潜在的故障路径，以识别最有可能满足Townsend故障条件的路径，称为CBP。为了验证CBPE模型的计算准确性，对具有三种不同结构的HHC进行了4.5 A级HHC点火测试。通过比较测试结果和击穿电压的计算结果，三种HHC条件下CBPE的计算误差范围为1.6％至5.8％，计算结果的趋势与测试结果一致。点火测试还显示了特征...