1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Experimental verification of the 3-step model of photoemission for energy spread and emittance measurements of copper and CsBr-coated copper photocathodes suitable for free electron laser applications
Rent:
Rent this article for
USD
10.1063/1.4769220
/content/aip/journal/apl/101/23/10.1063/1.4769220
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/23/10.1063/1.4769220

Figures

Image of FIG. 1.
FIG. 1.

Parallel plate analyzer with Au mesh. The analyzer measures the photoemission current over a 2π solid angle as a function of the retarding potential to determine the electron energy spectrum.

Image of FIG. 2.
FIG. 2.

Comparison of the energy spread of an uncoated single crystal (100) copper photocathode with the single crystal (100) Cu photocathode coated with a 25 A CsBr film when illuminated with a 8 mm CW 257 nm laser beam and a power density of ∼3 W/cm2. (a) Energy spread raw data corrected by the ratio of QE's of CsBr/Cu (4.5 × 10−4) and uncoated Cu 100 crystal (2.8 × 10−5). (b) Same as (a) but with peaks normalized to unity. (c) Error function shaped data obtained with the energy spread analyzer shown in Figure 1 . The energy spread of the uncoated copper sample is 0.31 eV, and the energy spread of the CsBr/Cu sample is 0.77 eV, both obtained from the FWHM of the derivative curve.

Image of FIG. 3.
FIG. 3.

The quantum efficiency as a function of the effective work function for an incident photon of 4.826 eV. The QE has been computed with two sets of parameters for the reflectivity, optical absorption length, and electron scattering length to estimate the systematic error of the effective work function.

Tables

Generic image for table
Table I.

Calculated intrinsic emittance for Cu and CsBr/Cu photocathodes.

Loading

Article metrics loading...

/content/aip/journal/apl/101/23/10.1063/1.4769220
2012-12-04
2014-04-18
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental verification of the 3-step model of photoemission for energy spread and emittance measurements of copper and CsBr-coated copper photocathodes suitable for free electron laser applications
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/23/10.1063/1.4769220
10.1063/1.4769220
SEARCH_EXPAND_ITEM