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Photoemission study of activated GaAs(100) negative electron affinity photocathodes
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10.1063/1.2945276
/content/aip/journal/apl/92/24/10.1063/1.2945276
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/24/10.1063/1.2945276
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A typical activation curve of the GaAs cathode. We turn on the Cs flux first. The QY increases and reaches its maximum. Then the flux is turned on after the QY drops to of the maximum reached. The QY increases again and will reach a higher maximum. We then turn off the and Cs sequentially.

Image of FIG. 2.
FIG. 2.

spectra taken at different time after the activation. There is a significant amount of nitrogen in the activation layer. There are two peaks in all the spectra. The intensity of peak 1 decreases with time and the intensity of peak 2 remains the same.

Image of FIG. 3.
FIG. 3.

spectra taken at different time after the activation. There is only one peak in each spectrum and the intensity of peak decreases with time.

Image of FIG. 4.
FIG. 4.

We calculated the normalized intensities of peaks and peaks at different times after the activation. There is strong correlation between peak 1 and . This indicates that the F atoms in the activation layer are bonded to the N atoms.

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/content/aip/journal/apl/92/24/10.1063/1.2945276
2008-06-17
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photoemission study of Cs–NF3 activated GaAs(100) negative electron affinity photocathodes
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/24/10.1063/1.2945276
10.1063/1.2945276
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