CAJ | 학술논문

空心阴极作为离子推力器放电室等离子体电离源初电子和束流中和电子的电子源，其点火可靠性直接影响到推力器的工作可靠性。以20 cm离子推力器在轨工作剖面为例，对空心阴极预期寿命下的可靠度进行了评价。采用小样本的可靠性试验与可靠性评价理论结合的方法，得到了LHC-5空心阴极点火6000次时在置信区间0.90和0.95的点火可靠性好于0.98。结果证明LHC-5空心阴极可靠性满足空间应用要求。研究成果对空心阴极可靠性增长设计和电推进产品可靠性评价方法研究具有积极意义。
공심음겁작위리자추력기방전실등리자체전리원초전자화속류중화전자적전자원，기점화가고성직접영향도추력기적공작가고성。이20 cm리자추력기재궤공작부면위례，대공심음겁예기수명하적가고도진행료평개。채용소양본적가고성시험여가고성평개이론결합적방법，득도료LHC-5공심음겁점화6000차시재치신구간0.90화0.95적점화가고성호우0.98。결과증명LHC-5공심음겁가고성만족공간응용요구。연구성과대공심음겁가고성증장설계화전추진산품가고성평개방법연구구유적겁의의。
As hollow cathode is the primary electron source for Ion thruster discharge chamber plasma ionization and also for electron beam neutralization, its ignition reliability directly affects the reliability of thruster operation. This paper depicted the evaluation of the reliability of ignition under the expected life of the hollow cathode by taking 20 cm ion thruster in orbit cross-section as an example. By using the method of a small sample of the reliability testing and combina-tion of reliability assessment theory, the results were obtained that between confidence intervals 0.9 to 0.95, hollow cath-ode ignition reliability is better than 0.98 when LHC-5 hollow cathode ignition times reaching 6 000 times. The results proved that the reliability of the hollow cathode of LHC-5 meeting the requirements of space applications. The research re-sults showed positive significance to reliability growth design of hollow cathode and research in reliability evaluation method of electric propulsion products.