Emission characteristics of dispenser cathodes with a fine-grained tungsten top layer

被引：7

作者：

Kimura, S ^{[1
]}

Higuchi, T ^{[1
]}

Ouchi, Y ^{[1
]}

Ueda, E ^{[1
]}

Nakamura, O ^{[1
]}

Sudo, T ^{[1
]}

Koyama, K ^{[1
]}

机构：

[1] TOSHIBA ELECT ENGN CORP,ISOGO KU,YOKOHAMA,KANAGAWA 235,JAPAN

来源：

APPLIED SURFACE SCIENCE | 1997年 / 111卷

关键词：

D O I：

10.1016/S0169-4332(96)00693-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to improve the emission stability of the Lr-coated dispenser cathode under ion bombardment, a fine-grained tungsten top layer was applied on the substrate porous tungsten plug before Ir coating. The emission characteristics were studied after being assembled in a CRT gun. Cathode current was measured under pulse operation in a range of 0.1-9% duty. Remarkable anti-ion bombardment characteristics were observed over the range of 1-6% duty. The improved cathode showed 1.5 times higher emission current than that of a conventional Ir-coated dispenser cathode at 4% duty. AES analysis showed that the recovering rates of surface Ba and O atoms after ion bombardment were 2.5 times higher. From these results it is confirmed that the Lr coated cathode with a fine-grained tungsten top layer is provided with a good tolerance against the ion bombardment.

引用

页码：60 / 63

页数：4

共 8 条

[1]

HIGUCHI T, 1994, C TRIS NASA CATH WOR, P253

[2]

HIGUCHI T, 1991, P INT EL DEV M WASH, P395

[3] IR-COATED DISPENSER CATHODE FOR CRT [J].

KIMURA, S ;

YAKABE, T ;

MATSUMOTO, S ;

MIYAZAKI, D ;

YOSHII, T ;

FUJIWARA, M ;

KOSHIGOE, S .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 1990, 37 (12) :2564-2567

[4] EMISSION CHARACTERISTICS AND SURFACE-COMPOSITION OF DISPENSER CATHODES IN REALISTIC VACUUM [J].

KIMURA, S ;

MIYAZAKI, D ;

HARA, M ;

FUJIWARA, M .

VACUUM, 1990, 41 (7-9) :1763-1765

[5]

KIMURA S, 1987, P INT EL DEV M WASH, P689

[6]

MANENSCHIJN A, 1994, P TRIS NASA CATH WOR, P177

[7] THE CHARACTERIZATION OF THE SURFACES OF TUNGSTEN-BASED DISPENSER CATHODES [J].

MARRIAN, CRK ;

SHIH, A ;

HAAS, GA .

APPLIED SURFACE SCIENCE, 1983, 16 (1-2) :1-24

[8]

TUCK RA, 1972, 4TH P INT C RES GAS, P277

← 1 →