Light Source Photocathode Performance and Development
EMSL Project ID
47670
Abstract
Accelerator photocathode technology must be advanced to meet the needs of fourth generation light sources. The ultimate output characteristics and cost of next generation UV or X-ray sources, whether based on free electron laser (FEL) or storage ring designs, is heavily dependent upon photocathode brightness and emittance characteristics. Novel photocathode materials could dramatically reduce light source construction costs by significantly simplifying downstream accelerator or FEL design. The international light source community recognizes the need for a more scientific approach to photocathode development and is in the initial stages of addressing this issue by organizing symposia and workshops. It is apparent that the fields of materials science, solid-state photochemistry, surface chemistry and analysis can make an immediate and timely contribution to this essential activity. To this end, staff at Pacific Northwest National Laboratory (PNNL) are working with photocathode specialists at Jefferson Lab (JLab), Argonne National Laboratory (ANL) and Lawrence Berkeley National Laboratory (LBNL).
Project Details
Start Date
2012-08-28
End Date
2013-09-08
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
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El-Khoury PZ, D Hu, VA Apkarian, and WP Hess. 2013. "Raman Scattering at Plasmonic Junctions Shorted by Conductive Molecular Bridges." Nano Letters 13(4):1858-1861. doi:10.1021/nl400733r
El-Khoury PZ, SJ Peppernick, D Hu, AG Joly, and WP Hess. 2013. "The Origin of Surface-Enhanced Raman Scattering of 4,4' -Biphenyldicarboxylate on Silver Substrates." Journal of Physical Chemistry C 117(14):7260-7268. doi:10.1021/jp401026x
He W, S VilayurGanapathy, AG Joly, TC Droubay, SA Chambers, JR Maldonado, and WP Hess. 2013. "Comparison of CsBr and KBr coated Cu photocathodes: Effects of laser irradiation and work function changes." Applied Physics Letters 102(7):Article No. 071604. doi:10.1063/1.4793214
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