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High brightness and high polarization electron source using transmission photocathode with GaAs-GaAsP superlattice layers
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10.1063/1.2887930
/content/aip/journal/jap/103/6/10.1063/1.2887930
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/6/10.1063/1.2887930
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Conceptual view of a PES gun with a T-PC.

Image of FIG. 2.
FIG. 2.

Schematic view of the JPES-1 system.

Image of FIG. 3.
FIG. 3.

Schematic view of the laser optical system.

Image of FIG. 4.
FIG. 4.

Typical laser spot profile observed by a CCD camera.

Image of FIG. 5.
FIG. 5.

Schematic crystal layer structure of a T-PC, where is the fraction ratio of P element in the GaAsP layer.

Image of FIG. 6.
FIG. 6.

Emission current as a function of extraction voltage for different laser power conditions.

Image of FIG. 7.
FIG. 7.

Emission current as a function of laser power for two different QE surface conditions.

Image of FIG. 8.
FIG. 8.

Observed ESP and QE spectra, indicated by closed circles and open squares, respectively.

Image of FIG. 9.
FIG. 9.

Spin-resolved QE spectra as a function of laser photon energy, where QL and QR are indicated by closed circles and open circles, respectively.

Image of FIG. 10.
FIG. 10.

(a) Schematic images of different laser focus conditions along the vertical axis and (b) ESP dependence on laser focus position on axis.

Image of FIG. 11.
FIG. 11.

(a) Beam radius at downstream from the T-PC and (b) reduced brightness, measured as a function of extraction voltage.

Image of FIG. 12.
FIG. 12.

Reduced brightness as a function of the obtained downstream beam current.

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/content/aip/journal/jap/103/6/10.1063/1.2887930
2008-03-20
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High brightness and high polarization electron source using transmission photocathode with GaAs-GaAsP superlattice layers
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/6/10.1063/1.2887930
10.1063/1.2887930
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