ELECTRON FIELD-EMISSION FROM SELECTIVELY CONTAMINATED CATHODES

被引：7

作者：

JIMENEZ, M ^{[1
]}

NOER, RJ ^{[1
]}

JOUVE, G ^{[1
]}

ANTOINE, C ^{[1
]}

JODET, J ^{[1
]}

BONIN, B ^{[1
]}

机构：

[1] CTR ETUD SACLAY,CEA,INSTN SEPEM,F-91191 GIF SUR YVETTE,FRANCE

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1993年 / 26卷 / 09期

关键词：

D O I：

10.1088/0022-3727/26/9/026

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electron field emission from various kinds of particles (approximately 20 mum) placed on plane cathodes has been measured in a SEM modified by the addition of a scanning anode tip. Results are similar for cathodes of Au (oxide free) and Nb (with thin insulating native oxide). In general no emission is found from insulating particles (Al2O3, SiO2) or particles with insulating oxides (Nb, Ti) under fields at least as high as 100 MV m-1, while oxide free particles (Ag, Au) and those with a conducting oxide (Fe) tend to emit strongly at much lower fields. Anodizing the Nb cathode surface to > 200 nm produces no significant change in emission; after initial emission the particle/substrate contact is found to be conducting. With rare exceptions, these results are consistent with a classic metallic projection model.

引用

页码：1503 / 1509

页数：7

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