INFLUENCE OF EXPOSURE TO CO, CO2 AND H2O ON THE STABILITY OF GAAS PHOTOCATHODES

被引：53

作者：

WADA, T

NITTA, T

NOMURA, T

MIYAO, M

HAGINO, M

机构：

[1] Research Institute of Electronics, Shizuoka University, Hamamatsu

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 10期

关键词：

Activation; Cs/0; GaAs; NEA; Photocathode; Quantum efficiency; Reactivation with Cs; Residual gas;

D O I：

10.1143/JJAP.29.2087

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of CO, CO2and H2O gases on the stability of negative-electron-affinity (NEA) GaAs photocathodes during operation is investigated in the present work. We have found that exposure both to H2O and CO2decreases the photocurrent of the photocathode. However, exposure to CO, which is known as a harmful gas to various photocathodes, has little effect on the photocathode stability. Furthermore, the effects of these gases on the restoration of the photocurrent by additional cesium deposition are investigated. These results are discussed with regard to the Cs/O activation layer which plays an important role in NEA GaAs photocathodes. © 1990 IOP Publishing Ltd.

引用

页码：2087 / 2091

页数：5

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