| 星型阴极的温度分布研究 |
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| 引用本文： | 窦菊英,朱长纯,皇甫鲁江,杨德清. 星型阴极的温度分布研究[J]. 真空科学与技术学报, 2002, 22(1): 49-52 |
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| 作者姓名： | 窦菊英 朱长纯 皇甫鲁江 杨德清 |
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| 作者单位： | 1. 西安交通大学电子工程系,西安,710049
2. 云南大学物理系,昆明,650091 |
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| 基金项目： | 云南省教委基金 ( 9942 0 95 )，国家自然科学基金，教育部博士点基金资助项目 |
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| 摘 要： | 通过对星型阴极的稳定导热问题进行分析 ,推导出阴极交叉点附近温度分布的近似解析式。并用有限差分数值计算方法对钨基底金属的温度分布进行了计算、分析。数值计算结果和解析结果在常用的阴极温度使用范围内吻合良好 ,表明该解析式在热、热 场、Schottky发射阴极的研究和实际应用中具有实用价值
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| 关 键 词： | 星型阴极 温度分布 数值方法 |
| 文章编号： | 0253-9748(2002)01-0049-04 |
| 修稿时间： | 2001-03-27 |
Study of Temperature Distribution near the Fork of Star Cathode |
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| Dou Juying,Zhu Changchun,Huangfu Lujiang. Study of Temperature Distribution near the Fork of Star Cathode[J]. JOurnal of Vacuum Science and Technology, 2002, 22(1): 49-52 |
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| Authors: | Dou Juying Zhu Changchun Huangfu Lujiang |
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| Abstract: | An analytical formula,used to approximately describe the variations in the temperature distributions near the fork of a star shaped emitter,was developed.The temperature distribution of the tungsten based metal emitters,was calculated with finite difference technique and its results were compared with those obtained by analytical estimation.Both results agree well in cathode operating temperature range.We suggest that the analytical formulas may be of practical interest in studies of various electron emitters used in thermal emission,thermal field emission and Schottky emission. |
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| Keywords: | Star cathode Temperature distribution Numerical method |
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