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- W2039989463 abstract "At present, two kinds of activation techniques for preparing GaAs NEA photocathode are available. In this paper,according to two kinds of photocurrent curve arising in the activation, the characteristic and mechanism of the two kindsof craft were summed up and compared with each other, and the further theoretical investigation on the mechanism ofactivation was carried out based on the recent research of NEA surface model for GaAs photocathode. It is proposed as aprocess principle that during (Cs, O) alternation phase of the activation process of GaAs photocathode, Cs should alwaysbe in excessive state. Besides, it is also indicated that whether Cs is excessive during (Cs, O) alternation phase and theCs/O ratio may affect directly the final property of photocathode. Finally, a method to modify the craft parameters toguard against the deviation from the principle is presented. The presented study is very necessary and significative foroptimizing the activation techniques so as to enhance the performances of GaAs NEA photocathodes." @default.
- W2039989463 created "2016-06-24" @default.
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- W2039989463 date "2010-05-13" @default.
- W2039989463 modified "2023-09-25" @default.
- W2039989463 title "Contrast study on GaAs photocathode activation techniques" @default.
- W2039989463 doi "https://doi.org/10.1117/12.864161" @default.
- W2039989463 hasPublicationYear "2010" @default.
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